[time-nuts] TNC connectors
I'm thinking of buying a Panasonic VIC100 timing antenna with a 50 ohm TNC connector (I assume) from fluke.l on eBay, as the room I use for my den has moved to one without a view to the south, so I can't use the puck antenna mounted just outside the window any more. The T-Bolt manual recommends 75 ohm coax, so will a 75 ohm TNC mate with a 50 ohm TNC without problems? Though I suppose for a short run of cable, 50 ohm will be OK? PS Where do you get the (1 diameter?) threaded poles these antennas screw onto? Cheers David Partridge ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
In a message dated 23/06/2009 09:29:38 GMT Daylight Time, david.partri...@dsl.pipex.com writes: The T-Bolt manual recommends 75 ohm coax, so will a 75 ohm TNC mate with a 50 ohm TNC without problems? Though I suppose for a short run of cable, 50 ohm will be OK? - Hi David There's been some previous discussion on this, perhaps an archive search will throw up past comments, and probably with usual Time-Nuts overkill:-). According to the manual the Thunderbolt antenna input impedance is 50ohms, despite their using an F connector, but they recommend using 75 ohm cable on the basis that it tends to have lower loss for a given size. Unless you're planning on really long runs I'd suggest just sticking with 50 ohm cable and connectors. I've got a couple of commercial antennas that come with predefined lengths of cable, 20 metres if I remember correctly, and these use RG58. I'm not sure if you'll get a TNC to F type adapter anyway, so you might have to revert to BNC on the cable at the Thunderbolt end. The mounting pole thread seems to be fairly standard but not sure on availability of threaded poles. One option would be a stub mounting plate as sold for marine use, one current ebay item for example is 250430681103, and a further search in the marine section might prove useful. regards Nigel GM8PZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
In a message dated 23/06/2009 11:00:13 GMT Daylight Time, d...@uk-ar.co.uk writes: However, it's years since I saw a 75r version, so I don't know for sure. Doing that with BNC's will lead to a flaky connection, as the centre pin on the 75r ones is much smaller. The other way round (50r plug into 75r socket) will damage the socket. As TNC's are very similar to BNC's ??? This belief about BNC connectors seems to be an urban myth, although admittedly one that I shared for many years. Whether or not it has been true at some time in the past, or of some manufacturers, I don't know but the following is a current quote from Amphenol --- Two distinct types of 75 Ω BNCs are available, and both mate with each other and with 50 Ω BNCs. Type 1 is designated 75 Ω BNC-T1 and provides constant 75 Ω performance with low VSWR DC – 4 GHz. Type 2 is designated 75 Ω BNC-T2 and is usable with low reflection DC - 1 GHz. For applications above 1 GHz, Type 1 is recommended. The full text of this can be found at _http://www.amphenolconnex.com/products/bnc.asp_ (http://www.amphenolconnex.com/products/bnc.asp) and I've seen similar comments from other manufacturers. regards Nigel GM8PZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
Hi Dave, The Solartron 7081 is very happy and so am I :-). Thanks yet again for all your help. Re: different sized centre pins - I know that's true of N type connectors, - you really don't want to push an N type male 50R into an N type female 75R connector. However I'm pretty sure that it doesn't apply to BNC - just wasn't sure about TNC. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
David, I used a piece of pvc conduit to mount the antenna. It fits in the vic-100's mounting skirt. If it does not have a mounting skirt, perhaps use a flange and drill the appropriate holes, apply RTV (or your favorite sealant!). Norm (The divider board is working like a charm!! Even impressed the heck out of my new GF!!! GKK!!!) David C. Partridge wrote: Hi Dave, The Solartron 7081 is very happy and so am I :-). Thanks yet again for all your help. Re: different sized centre pins - I know that's true of N type connectors, - you really don't want to push an N type male 50R into an N type female 75R connector. However I'm pretty sure that it doesn't apply to BNC - just wasn't sure about TNC. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
Norman, PVC conduit sounds like a good solution. I'm delighted to hear the frequency divider board is performing good service. I was rather surprised when there was insufficient interest to justify getting a further batch of boards made up. I'm pretty sure it would out-perform any micro based solution (no disrespect to the TAPR board intended) in terms of jitter etc. especially if you used thin film resistors instead of thick film in the clock circuit, but don't have the test equipment to measure that. I wonder if anyone did get round to measuring how good or bad it was - I did try (with a lot of help from Bruce) to design it to minimise that sort of problem. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Norman J McSweyn Sent: 23 June 2009 11:54 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] TNC connectors David, I used a piece of pvc conduit to mount the antenna. It fits in the vic-100's mounting skirt. If it does not have a mounting skirt, perhaps use a flange and drill the appropriate holes, apply RTV (or your favorite sealant!). Norm (The divider board is working like a charm!! Even impressed the heck out of my new GF!!! GKK!!!) David C. Partridge wrote: Hi Dave, The Solartron 7081 is very happy and so am I :-). Thanks yet again for all your help. Re: different sized centre pins - I know that's true of N type connectors, - you really don't want to push an N type male 50R into an N type female 75R connector. However I'm pretty sure that it doesn't apply to BNC - just wasn't sure about TNC. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
Dave Baxter wrote: Doing that with BNC's will lead to a flaky connection, as the centre pin on the 75r ones is much smaller. The other way round (50r plug into 75r socket) will damage the socket. As TNC's are very similar to BNC's ??? You are thinking of the incompatibility between 50 ohm and 75 ohm *N* connectors. 75 ohm BNC are use the same center pin hardware as 50 ohm BNC. The only difference is in the white plastic (teflon) insulator. In the 50 ohm BNC, the center insulator goes all the way to the tip of the center pin. In the 75 ohm BNC, the center insulator is abbreviated. HP/Agilent uses 75 OHM BNC's on several of its devices that have switchable impedances. For example, the 3586C. -Chuck Harris ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
Message: 3 Date: Tue, 23 Jun 2009 07:54:02 -0400 From: Chuck Harris cfhar...@erols.com Subject: Re: [time-nuts] TNC connectors To: Discussion of precise time and frequency measurement time-nuts@febo.com Message-ID: 4a40c25a.7080...@erols.com Content-Type: text/plain; charset=ISO-8859-1; format=flowed Dave Baxter wrote: Doing that with BNC's will lead to a flaky connection, as the centre pin on the 75r ones is much smaller. The other way round (50r plug into 75r socket) will damage the socket. As TNC's are very similar to BNC's ??? You are thinking of the incompatibility between 50 ohm and 75 ohm *N* connectors. 75 ohm BNC are use the same center pin hardware as 50 ohm BNC. The only difference is in the white plastic (teflon) insulator. In the 50 ohm BNC, the center insulator goes all the way to the tip of the center pin. In the 75 ohm BNC, the center insulator is abbreviated. HP/Agilent uses 75 OHM BNC's on several of its devices that have switchable impedances. For example, the 3586C. -Chuck Harris Indeed looking as some more data sheets. However, I have somewhere in the deed box at home, some Ex BT BNC's, marked up as 75 Ohm, that have very much smaller center pin's than the common or garden 50r types, as well as less plastic in there too. We once had a Novell computer network in the office, that used 93r coax cable, and 50r BNC's, at 100MBPS. Using Thomas Conrad cards I seem to remember. We still have the real of 93r coax. (It was very much faster end to end, and much more stable than the TCP/IP based Microsoft network we have now, but I digress.) In general, yes indeed size for size, 75r coax will be less lossy than 50r types, but if the RX does present a nominal 50r load, they may be some potential issues. However, if the antenna is an active type, it's probably not worth fussing over. Enough people have used what's recomended I guess and found no problems. Just use good quality cable, not the so called Low loss TV coax. I'd guess the foam dielectric Satelite LNB cable would do. It fit's 'F' connectors too. Cheers All. Dave B. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
Hmmm now all I have to do is find a TNC connector to fit FT100 (or RG6) without paying 5 times thet value of the connector for shipping - or just use RG58 as I've got BNC for this, and can easily get TNC for it too. Thanks to all Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Dave Baxter Sent: 23 June 2009 13:40 To: time-nuts@febo.com Subject: Re: [time-nuts] TNC connectors Message: 3 Date: Tue, 23 Jun 2009 07:54:02 -0400 From: Chuck Harris cfhar...@erols.com Subject: Re: [time-nuts] TNC connectors To: Discussion of precise time and frequency measurement time-nuts@febo.com Message-ID: 4a40c25a.7080...@erols.com Content-Type: text/plain; charset=ISO-8859-1; format=flowed Dave Baxter wrote: Doing that with BNC's will lead to a flaky connection, as the centre pin on the 75r ones is much smaller. The other way round (50r plug into 75r socket) will damage the socket. As TNC's are very similar to BNC's ??? You are thinking of the incompatibility between 50 ohm and 75 ohm *N* connectors. 75 ohm BNC are use the same center pin hardware as 50 ohm BNC. The only difference is in the white plastic (teflon) insulator. In the 50 ohm BNC, the center insulator goes all the way to the tip of the center pin. In the 75 ohm BNC, the center insulator is abbreviated. HP/Agilent uses 75 OHM BNC's on several of its devices that have switchable impedances. For example, the 3586C. -Chuck Harris Indeed looking as some more data sheets. However, I have somewhere in the deed box at home, some Ex BT BNC's, marked up as 75 Ohm, that have very much smaller center pin's than the common or garden 50r types, as well as less plastic in there too. We once had a Novell computer network in the office, that used 93r coax cable, and 50r BNC's, at 100MBPS. Using Thomas Conrad cards I seem to remember. We still have the real of 93r coax. (It was very much faster end to end, and much more stable than the TCP/IP based Microsoft network we have now, but I digress.) In general, yes indeed size for size, 75r coax will be less lossy than 50r types, but if the RX does present a nominal 50r load, they may be some potential issues. However, if the antenna is an active type, it's probably not worth fussing over. Enough people have used what's recomended I guess and found no problems. Just use good quality cable, not the so called Low loss TV coax. I'd guess the foam dielectric Satelite LNB cable would do. It fit's 'F' connectors too. Cheers All. Dave B. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
Dave Baxter wrote: Indeed looking as some more data sheets. However, I have somewhere in the deed box at home, some Ex BT BNC's, marked up as 75 Ohm, that have very much smaller center pin's than the common or garden 50r types, as well as less plastic in there too. Connectors that deviate from standards were at one time pretty common. The Ex BT BNC's in your junk box are undoubtedly an example. I have run into carbon copies of the old PL259/SO239 UHF connectors that were identical in all respects, including the nomenclature markings, but were metric threaded. And, I have run into alleged BNC's that looked like they were ok, but wouldn't mate with anything I could find. They were a silly millimeter bigger in diameter. We once had a Novell computer network in the office, that used 93r coax cable, and 50r BNC's, at 100MBPS. Using Thomas Conrad cards I seem to remember. We still have the real of 93r coax. 93 ohm coax is standard fare for automobile AM radios in the US. Its claim to fame is its very low capacitance per foot. (It was very much faster end to end, and much more stable than the TCP/IP based Microsoft network we have now, but I digress.) In general, yes indeed size for size, 75r coax will be less lossy than 50r types, but if the RX does present a nominal 50r load, they may be some potential issues. Unlikely. The biggest issue would be edge smearing caused by the received signal bouncing up and down the length of the coax. This effect is minimized because the mismatch is small, and the loss of the coax is pretty high. However, if the antenna is an active type, it's probably not worth fussing over. Enough people have used what's recomended I guess and found no problems. Just use good quality cable, not the so called Low loss TV coax. What a thing to say! Quad shielded RG-6 is the minimum quality you will find for today's TV and cable systems. Even RadioShack sells it. It is the same stuff used by the satellite TV guys. I'd guess the foam dielectric Satelite LNB cable would do. It fit's 'F' connectors too. That is because Satellite LNB's use Quad RG 6. Normal TV coax. -Chuck Harris ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
I just bought two of these antennas from Bob (fluke.l) and asked him to throw in adapters from TNC on the antenna to female F so I can use ordinary 75 ohm cable TV coax from rat shack. He charged an extra $5 for the adapters which I think is a pretty good deal. Still waiting on delivery so I don't know for sure what was thrown in the box but I'll let you guys know if there was a problem. -Bob On Tue, Jun 23, 2009 at 7:50 AM, David C. Partridge david.partri...@dsl.pipex.com wrote: Hmmm now all I have to do is find a TNC connector to fit FT100 (or RG6) without paying 5 times thet value of the connector for shipping - or just use RG58 as I've got BNC for this, and can easily get TNC for it too. Thanks to all Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Dave Baxter Sent: 23 June 2009 13:40 To: time-nuts@febo.com Subject: Re: [time-nuts] TNC connectors Message: 3 Date: Tue, 23 Jun 2009 07:54:02 -0400 From: Chuck Harris cfhar...@erols.com Subject: Re: [time-nuts] TNC connectors To: Discussion of precise time and frequency measurement time-nuts@febo.com Message-ID: 4a40c25a.7080...@erols.com Content-Type: text/plain; charset=ISO-8859-1; format=flowed Dave Baxter wrote: Doing that with BNC's will lead to a flaky connection, as the centre pin on the 75r ones is much smaller. The other way round (50r plug into 75r socket) will damage the socket. As TNC's are very similar to BNC's ??? You are thinking of the incompatibility between 50 ohm and 75 ohm *N* connectors. 75 ohm BNC are use the same center pin hardware as 50 ohm BNC. The only difference is in the white plastic (teflon) insulator. In the 50 ohm BNC, the center insulator goes all the way to the tip of the center pin. In the 75 ohm BNC, the center insulator is abbreviated. HP/Agilent uses 75 OHM BNC's on several of its devices that have switchable impedances. For example, the 3586C. -Chuck Harris Indeed looking as some more data sheets. However, I have somewhere in the deed box at home, some Ex BT BNC's, marked up as 75 Ohm, that have very much smaller center pin's than the common or garden 50r types, as well as less plastic in there too. We once had a Novell computer network in the office, that used 93r coax cable, and 50r BNC's, at 100MBPS. Using Thomas Conrad cards I seem to remember. We still have the real of 93r coax. (It was very much faster end to end, and much more stable than the TCP/IP based Microsoft network we have now, but I digress.) In general, yes indeed size for size, 75r coax will be less lossy than 50r types, but if the RX does present a nominal 50r load, they may be some potential issues. However, if the antenna is an active type, it's probably not worth fussing over. Enough people have used what's recomended I guess and found no problems. Just use good quality cable, not the so called Low loss TV coax. I'd guess the foam dielectric Satelite LNB cable would do. It fit's 'F' connectors too. Cheers All. Dave B. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
[snip] On my FTS antenna it's just a standard 1 NPT male thread (NPT = National Pipe Thread). Any US plumbing supply store or home improvement store will sell you iron pipe threaded that way or adapters to go to PVC or copper. -John PS Where do you get the (1 diameter?) threaded poles these antennas screw onto? Cheers David Partridge ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
If the thread measures 1 inch, it isn't 1 inch pipe thread. It is more likely 1/2 inch pipe thread, or possibly 3/4 inch, depending on how accurately you measured. 1 inch pipe is 1-3/8 inch OD, 3/4 inch pipe is 1-1/16 inch OD, and 3/4 inch pipe is 7/8 inch OD. -Chuck Harris J. Forster wrote: [snip] On my FTS antenna it's just a standard 1 NPT male thread (NPT = National Pipe Thread). Any US plumbing supply store or home improvement store will sell you iron pipe threaded that way or adapters to go to PVC or copper. -John PS Where do you get the (1 diameter?) threaded poles these antennas screw onto? Cheers David Partridge ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
I just took the antenna to Home Depot and looked through the bins, found something that fit well, paid, and left. LoL. Whatever the nominal Pipe size, mine is NPT for sure. -John == If the thread measures 1 inch, it isn't 1 inch pipe thread. It is more likely 1/2 inch pipe thread, or possibly 3/4 inch, depending on how accurately you measured. 1 inch pipe is 1-3/8 inch OD, 3/4 inch pipe is 1-1/16 inch OD, and 3/4 inch pipe is 7/8 inch OD. -Chuck Harris J. Forster wrote: [snip] On my FTS antenna it's just a standard 1 NPT male thread (NPT = National Pipe Thread). Any US plumbing supply store or home improvement store will sell you iron pipe threaded that way or adapters to go to PVC or copper. -John PS Where do you get the (1 diameter?) threaded poles these antennas screw onto? Cheers David Partridge ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
Hello Dave, I looked for that antenna but could not find it, to understand how to mate to it. Consider using to a coaxial adapter at the antenna, TNC male to BNC female. Then put a BNC male connector on whatever coax you will be using. In an ideal world, a 75 ohm TNC will NOT mate a 50 ohm TNC. May feel like it is screwed in properly but the diameter of the center pin is smaller for the 75 ohm version. So, if you jam in a larger 50 ohm male center pin into a smaller 75 ohm female center pin, you will destroy it. Having said that, most connectors you find will be 50 ohm, just be watchful for the odd ball. I got my chromed pipe for the GPS antenna from a friend. Actual O.D. is 1.007 and the male thread looks to be a straight thread. Check the specs on the Panasonic antenna for the mating thread required. Check out the Home Depot's plumbing section for either galvi pipe or white PVC pipe. The electrical section will have a grey PVC pipe that may be more suitable and UV proof. Stan, W1LE Cape Cod FN41sr David C. Partridge wrote: I'm thinking of buying a Panasonic VIC100 timing antenna with a 50 ohm TNC connector (I assume) from fluke.l on eBay, as the room I use for my den has moved to one without a view to the south, so I can't use the puck antenna mounted just outside the window any more. The T-Bolt manual recommends 75 ohm coax, so will a 75 ohm TNC mate with a 50 ohm TNC without problems? Though I suppose for a short run of cable, 50 ohm will be OK? PS Where do you get the (1 diameter?) threaded poles these antennas screw onto? Cheers David Partridge ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] OT: Re: TNC connectors
Chuck, please realise we're in the UK, not the US, so things are significantly different in many ways... TV coax hear is really cheap cruddy stuff, if you're very lucky you might get 50% braid/shielding coverage! There was no real need to prevent ingress or egress of signals, as (other than channel 36 around some airports) that band was dedicated to broadcast TV. Unlike in the US, where your cable distribution systems had to be buttoned up quite well, as the same frequencies are also used over the air for other services etc. The Satellite LNB coax that you regard as standard TV coax, has only recently become common over here, since the rise in popularity of Satellite TV, and the need to use good quality cable, as well as keeping stuff in or out as needed. Yes, I'm aware of the old AM car radio aerial cable. But from what I've seen (still got in places) that was a very poor imitation of the 93r coax we used for the network. Almost no braid, and the very thin wire (much thinner than in the network cable) just floating about in the tube dielectric, no spiral filament to hold it in the centre. But it was no doubt cheap to produce. (That reminds me, I need a replacement broadcast antenna for the 4x4, the last one argued with a tree, and lost, not as rugged as advertised!) Metric vs Imperial: Wasn't the USA supposed to go Metric decades ago? Many instrument makers managed it (IBM, HP, TEK etc.) But the folklore I remember when I was in the US just down 101 from San Jose back in the early 90's, states that most small (jobbing) metal bashing suppliers just plain refused to push the Metric button on their CNC machines ;-)Certainly, the ones we used would and could do metric if you really wanted, but they didn't half grumble about it... (They did a good job though!) Non standard connectors, yes, it happens. BT in this context is British Telecom, and I guess they could have had connectors made especially for them. But I've also seen the same things on Ex BBC broadcast and other kit. Closely allied to BT or the GPO as it used to be it has to be said, so no surprise there I guess. In either case, I suspect it effectively became a Standard over hear within that industry. Metric UHF connector threads. Yep, whatever the thread is supposed to be, there are many variations on that theme (and also the exact size of the centre pin!) Another reason I avoid them like the plague!. Not least their tendency to explode in flames with a kilowatt flowing through them! There again, I've also destroyed good clean N connectors with less RF than that. (Bad VSWR problems!) Radio Shack never existed in the UK. There was a brief period where Tandy was on the high street, with Rat Shack branded products. RS over hear stands for what used to be Radio Spares. Now RS Components, one of the big (huge) catalogue based component suppliers, like your Mouser or DigiKey (who are also over hear in a small but expensive way.) Even then, Tandy went for the Gadget toy and phone market, abandoning even the small line of components they had, their products were of doubtful quality as well from what I remember. The closest now in the UK would be Maplin, though they are slowly moving away from components, towards toys, gadgets, PC's and phones etc. Go in to there and start asking for TNC connectors, and you'll probably get a blank stare... What you call RCA connectors, we call Phono connectors. Another example. Interestingly, Maplin do this... http://www.maplin.co.uk/Module.aspx?ModuleNo=1587C=SOU=strat15 A TNC Male, to BNC Female adapter. For the impressive cost of £1.89 Useful to know. Now all you have to do, is find a store with one in stock, and what the Quality is like is anyone's guess at that price. Pipe threads and mounting poles... We can't just go to Any US plumbing supply store. There are DIY equivalent stores here of course, but you'd be very lucky indeed to find any iron water piping for domestic use these days. Threaded or otherwise! Even our water plumbing (Hot as well as cold) is moving towards plastic and push fit fittings. (!) Again, please be aware we are not in the USA, and 90+% of all our suppliers are exclusively metric, so it can be an issue to get the correct stuff, when it is critical, and it is some odd (to us) imperial size or thread fitting.. Strangely, the more common it is in the US, the scarcer it is over hear it seems. Bit like trying to by Tea bags and Branston Pickle in the US. Not to say a decent electric kettle! :-) 'Nuff said I think. Regards to all. Dave B. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT: Re: TNC connectors
Chuck, please realise we're in the UK [snip] Metric vs Imperial: Wasn't the USA supposed to go Metric decades ago? Many instrument makers managed it (IBM, HP, TEK etc.) But the folklore I remember when I was in the US just down 101 from San Jose back in the early 90's, states that most small (jobbing) metal bashing suppliers just plain refused to push the Metric button on their CNC machines ;-) Certainly, the ones we used would and could do metric if you really wanted, but they didn't half grumble about it... (They did a good job though!) Yes, but it really didn't happen. HP and maybe Tek did switch for the world market as did the car makers, but metric fastners are still a minority here. Most 'home centers' do carry some sizes in small quantities at high prices. [snip] Radio Shack never existed in the UK. There was a brief period where Tandy was on the high street, with Rat Shack branded products. RS over hear stands for what used to be Radio Spares. Now RS Components, one of the big (huge) catalogue based component suppliers, like your Mouser or DigiKey (who are also over hear in a small but expensive way.) Their motto is You got questions, we got cell phones. Actually, they do have a minimal selection of parts (about the only people in most areaws that do) but it's really cell phones, toys, and consumer electronics like TVs. Even then, Tandy went for the Gadget toy and phone market, abandoning even the small line of components they had, their products were of doubtful quality as well from what I remember. The closest now in the UK would be Maplin, though they are slowly moving away from components, towards toys, gadgets, PC's and phones etc. Go in to there and start asking for TNC connectors, and you'll probably get a blank stare... What you call RCA connectors, we call Phono connectors. Another example. Both names are used in the US. Interestingly, Maplin do this... http://www.maplin.co.uk/Module.aspx?ModuleNo=1587C=SOU=strat15 A TNC Male, to BNC Female adapter. For the impressive cost of £1.89 Useful to know. Now all you have to do, is find a store with one in stock, and what the Quality is like is anyone's guess at that price. Pipe threads and mounting poles... We can't just go to Any US plumbing supply store. There are DIY equivalent stores here of course, but you'd be very lucky indeed to find any iron water piping for domestic use these days. Threaded or otherwise! Even our water plumbing (Hot as well as cold) is moving towards plastic and push fit fittings. (!) Iron pipe comes in two types: Black and galvanized. The former is for gas, the later for water (and is rarely used, except for old work these days). The water systems in the UK used to be very different than here, with supply pressures from 30 to 120 PSI. There have also been some massive problems with plastic pipe fittings leaking. Copper w/ soldered connections has been the best choice although that may be cfhanging. Plastic, because it's flexible, is cheaper to install. Again, please be aware we are not in the USA, and 90+% of all our suppliers are exclusively metric, so it can be an issue to get the correct stuff, when it is critical, and it is some odd (to us) imperial size or thread fitting.. I don't know if there is a Metric standard corresponding to NPT, but 've seen fittings (like Swageloc) for Metric tubing with NPT threads. Strangely, the more common it is in the US, the scarcer it is over hear it seems. Bit like trying to by Tea bags and Branston Pickle in the US. Not to say a decent electric kettle! :-) The first and third are common. -John 'Nuff said I think. Regards to all. Dave B. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lady Heather update in progress
Lady Heather is undergoing her periodic trip to the beauty parlor. A few new gratuitous features have already crept in: * You can specify a time/date for the program to exit * The satellite elevation shows if the satellite is rising or setting * You can show the times in your local time zone * Periods of holdover are flagged in the plot * The tbolt version and serial info is written to the log file * You can specify command line options in a .CFG file Now would be a good time to suggest any new features that you can't live without... _ Microsoft brings you a new way to search the web. Try Bing™ now http://www.bing.com?form=MFEHPGpubl=WLHMTAGcrea=TEXT_MFEHPG_Core_tagline_try_bing_1x1 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT: Re: 1 poles in UK
The 1 mounts used for many GPS antennas are available in the UK. They are common on boats and available from most ships chandler's (price is another thing). I have a Shakespear adjustable mount and fibreglass extension. Then there is always *bay. Robert G8RPI. --- On Tue, 23/6/09, Dave Baxter d...@uk-ar.co.uk wrote: From: Dave Baxter d...@uk-ar.co.uk Subject: [time-nuts] OT: Re: TNC connectors To: time-nuts@febo.com Date: Tuesday, 23 June, 2009, 5:49 PM Chuck, please realise we're in the UK, not the US, so things are significantly different in many ways... TV coax hear is really cheap cruddy stuff, if you're very lucky you might get 50% braid/shielding coverage! There was no real need to prevent ingress or egress of signals, as (other than channel 36 around some airports) that band was dedicated to broadcast TV. Unlike in the US, where your cable distribution systems had to be buttoned up quite well, as the same frequencies are also used over the air for other services etc. The Satellite LNB coax that you regard as standard TV coax, has only recently become common over here, since the rise in popularity of Satellite TV, and the need to use good quality cable, as well as keeping stuff in or out as needed. Yes, I'm aware of the old AM car radio aerial cable. But from what I've seen (still got in places) that was a very poor imitation of the 93r coax we used for the network. Almost no braid, and the very thin wire (much thinner than in the network cable) just floating about in the tube dielectric, no spiral filament to hold it in the centre. But it was no doubt cheap to produce. (That reminds me, I need a replacement broadcast antenna for the 4x4, the last one argued with a tree, and lost, not as rugged as advertised!) Metric vs Imperial: Wasn't the USA supposed to go Metric decades ago? Many instrument makers managed it (IBM, HP, TEK etc.) But the folklore I remember when I was in the US just down 101 from San Jose back in the early 90's, states that most small (jobbing) metal bashing suppliers just plain refused to push the Metric button on their CNC machines ;-) Certainly, the ones we used would and could do metric if you really wanted, but they didn't half grumble about it... (They did a good job though!) Non standard connectors, yes, it happens. BT in this context is British Telecom, and I guess they could have had connectors made especially for them. But I've also seen the same things on Ex BBC broadcast and other kit. Closely allied to BT or the GPO as it used to be it has to be said, so no surprise there I guess. In either case, I suspect it effectively became a Standard over hear within that industry. Metric UHF connector threads. Yep, whatever the thread is supposed to be, there are many variations on that theme (and also the exact size of the centre pin!) Another reason I avoid them like the plague!. Not least their tendency to explode in flames with a kilowatt flowing through them! There again, I've also destroyed good clean N connectors with less RF than that. (Bad VSWR problems!) Radio Shack never existed in the UK. There was a brief period where Tandy was on the high street, with Rat Shack branded products. RS over hear stands for what used to be Radio Spares. Now RS Components, one of the big (huge) catalogue based component suppliers, like your Mouser or DigiKey (who are also over hear in a small but expensive way.) Even then, Tandy went for the Gadget toy and phone market, abandoning even the small line of components they had, their products were of doubtful quality as well from what I remember. The closest now in the UK would be Maplin, though they are slowly moving away from components, towards toys, gadgets, PC's and phones etc. Go in to there and start asking for TNC connectors, and you'll probably get a blank stare... What you call RCA connectors, we call Phono connectors. Another example. Interestingly, Maplin do this... http://www.maplin.co.uk/Module.aspx?ModuleNo=1587C=SOU=strat15 A TNC Male, to BNC Female adapter. For the impressive cost of £1.89 Useful to know. Now all you have to do, is find a store with one in stock, and what the Quality is like is anyone's guess at that price. Pipe threads and mounting poles... We can't just go to Any US plumbing supply store. There are DIY equivalent stores here of course, but you'd be very lucky indeed to find any iron water piping for domestic use these days. Threaded or otherwise! Even our water plumbing (Hot as well as cold) is moving towards plastic and push fit fittings. (!) Again, please be aware we are not in the USA, and 90+% of all our suppliers are exclusively metric, so it can be an issue to get the correct stuff, when it is critical, and it is some odd (to us) imperial size or thread fitting.. Strangely, the more common it is in the US, the scarcer it is over
[time-nuts] Lady Heather Request Sig Str vs 0- 24 Sidereal hrs
Hi Mark: I've been told that by plotting the signal strength for each satellite you can see multipath distortion as oscillations near rise and set. Is there a way to see a plot of SV signal strength for all 32 satellites? Since each GPS satellite has the same ground track they would overlay each other if the signal strength plot used siderial time instead of UTC. Is there a way to plot the signal strength for each SV vs. sidereal time 0 to 24 hours? -- Have Fun, Brooke Clarke http://www.prc68.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lady Heather update in progress
Mark Sims skrev: Lady Heather is undergoing her periodic trip to the beauty parlor. A few new gratuitous features have already crept in: * You can specify a time/date for the program to exit * The satellite elevation shows if the satellite is rising or setting * You can show the times in your local time zone * Periods of holdover are flagged in the plot * The tbolt version and serial info is written to the log file * You can specify command line options in a .CFG file Now would be a good time to suggest any new features that you can't live without... Last time I was down in Lady Heathers dungeon she didn't have any PLL control options and other related time configuration parameters... Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lady Heather update in progress
On Tue, 23 Jun 2009 18:08:20 +, Mark Sims wrote: Lady Heather is undergoing her periodic trip to the beauty parlor. A few new gratuitous features have already crept in: * You can specify a time/date for the program to exit * The satellite elevation shows if the satellite is rising or setting * You can show the times in your local time zone * Periods of holdover are flagged in the plot * The tbolt version and serial info is written to the log file * You can specify command line options in a .CFG file Now would be a good time to suggest any new features that you can't live without... Hello Mark, normally I do run LH without the log option tick. but in some cases it would be fine for me to have still the option to save (or discard) the data when stopping the program. I think the data are still in the memory because I can walk back in the graphics part... Is there a way to put in that feature? Many thanks so far for this very practical and useful tool! regards Arnold ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] LF power supply noise
Magnus wrote: Mike wrote: So about the only thing left of interest is histograms of the jitter. Unfortunately, the 543310A cannot store enough samples to really make an interesting graph. What I would like to be able to do is similar to an invention I made for the disk industry long ago, called Phase Margin Analysis. There is a brief description on my web page at http://pstca.com/patents.htm#phasemargin Somewhere in my map of apps there is a HP appnote for doing the same, to discs, intended for disc industry, back in the days. That may very well be a result of my invention, which occurred in 1970, was published in 1979, and was copied by IBM in the 1990's. But I have all the HP appnotes for disk. I don't recall any of them describing what I show above. Can you provide more information? I found it. AN 191-7, 8.34 MB PDF, for the 5370B Universal Time Interval Counter Dated 1987-06-01 url: http://cp.literature.agilent.com/litweb/pdf/5952-7908.pdf web page: http://www.home.agilent.com/agilent/facet.jspx?c=153627.i.2to=80030.k.1cc=USlc=eng There are so many thing wrong with that app note I don't have time to list them all. First, it is dated June, 1987. That is 17 years after I invented Phase Margin Analysis, and 8 years after the Katz Campbell article was published in IEEE Transactions on Magnetics. By this time, the technique of Phase Margin Analysis was used in every hard disk company all over the world. You simply could not design, analyze, or manufacture a hard disk without it. So it was well known and understood. But in this case, it looks like some junior applications engineer got a brilliant idea to advance his career and publish this app note. He has no clue about magnetic recording and what it takes to store data on the disk and read it back. The article was written for floppy disks. The maximum rate of data collection is mentioned at 8,000 samples/sec. That is useless. In order to detect the loss in margin caused by a single bit defect, you must collect data on each and every transition. For example, see Figs 6 and 7 in the Katz paper: http://pstca.com/pdfs/katz.pdf Thus, 8,000 samples/sec is far below the data rate needed for floppy, and hopelessly inadequate for hard disk. The timing measurement described in the app note does not clearly describe where the data and clock signals come from. Ideally, the timing measurement should be made at the output of the PFD in order to include any offsets in the phase detector, and to include the loop dynamics in the measurement. For example, the heads on a hard disk flutter as they move across bumps and imperfections in the surface. This causes a phase error in the loop that can turn a minor disk defect into a hard error, or mask an error by shifting the phase in the opposite direction. A similar effect occurs on floppy disk with imperfections and variations in the coating thickness. The next time the sector is written, the timing shifts slightly. So what was previously an error-free disk suddenly turns into a hard error. Or vice-versa. For example, see my micro-defect patent at http://pstca.com/patents.htm#microdefect These issues are not emphasized in the app note, so it is unlikely the author is even aware of them. It is not clear how the 5370B is connected to the electronics. Just blindly hooking up cables could cause all sorts of loading and grounding problems. These issues are not emphasized in the app note, so it is unlikely the author is even aware of them. The Gaussian curve is a parabola when measured on log-linear plot. Any deviation from a parabolic curve on the side of the margin plot is an indication of problems that need to be addressed. The plots in the Katz paper all show the parabolic drop. But the plots in the app note have any kind of shape you may want, and the software allows you to select various parameters for the curve fit. This is wrong. The plots shown in the app note are useless for making analytical measurements of the performance of the channel. The app note is wrong, misleading, propagates false information about data channels and measuring Phase Margin, and should never have been published. I could go on, and will probably kick myself for forgetting some hugely important issue. But I have to stop and work on several other issues that suddenly came up. (Nothing terribly important. My landlord needs some help with urgent problems in the laundromat and kitchen. He is a nice guy so I try to help whenever I can, and he counts on me when problems crop up. So one minute I am analyzing one of the most exotic measurement capabilities available on the planet, and the
Re: [time-nuts] TNC connectors
Hi John, I only mentioned it so that someone wouldn't measure 1 inch, and walk off to Home Depot and ask for 1 inch, only to be in for a big surprise. -Chuck Harris J. Forster wrote: I just took the antenna to Home Depot and looked through the bins, found something that fit well, paid, and left. LoL. Whatever the nominal Pipe size, mine is NPT for sure. -John == If the thread measures 1 inch, it isn't 1 inch pipe thread. It is more likely 1/2 inch pipe thread, or possibly 3/4 inch, depending on how accurately you measured. 1 inch pipe is 1-3/8 inch OD, 3/4 inch pipe is 1-1/16 inch OD, and 3/4 inch pipe is 7/8 inch OD. -Chuck Harris ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TNC connectors
True. I always take the to be mated part w/ me to avoid repeat trips. -John = Hi John, I only mentioned it so that someone wouldn't measure 1 inch, and walk off to Home Depot and ask for 1 inch, only to be in for a big surprise. -Chuck Harris J. Forster wrote: I just took the antenna to Home Depot and looked through the bins, found something that fit well, paid, and left. LoL. Whatever the nominal Pipe size, mine is NPT for sure. -John == If the thread measures 1 inch, it isn't 1 inch pipe thread. It is more likely 1/2 inch pipe thread, or possibly 3/4 inch, depending on how accurately you measured. 1 inch pipe is 1-3/8 inch OD, 3/4 inch pipe is 1-1/16 inch OD, and 3/4 inch pipe is 7/8 inch OD. -Chuck Harris ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lady Heather update in progress
Hello Arnold, That feature is already in the current release (v 2.0). You can use the 'w' keyboard command to write the data to a file. You can select either the complete buffer or just the time span displayed on the screen. --- normally I do run LH without the log option tick. but in some cases it would be fine for me to have still the option to save (or discard) the data when stopping the program. _ Hotmail® has ever-growing storage! Don’t worry about storage limits. http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutorial_Storage_062009 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lady Heather update in progress
Hello Arnold, That feature is already in the current release (v 2.0). You can use the 'w' keyboard command to write the data to a file. You can select either the complete buffer or just the time span displayed on the screen. --- normally I do run LH without the log option tick. but in some cases it would be fine for me to have still the option to save (or discard) the data when stopping the program. _ Lauren found her dream laptop. Find the PC that’s right for you. http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lady Heather update in progress
Hello Magnus, The current version (v 2.0) already supports modifying the pll and oscillator parameters. Use the '' keyboard command. _ Lauren found her dream laptop. Find the PC that’s right for you. http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lady Heather update in progress
Hello Mark, I appreciate LH and your development effort. I do not log data, but rather I periodically do a screen grab as a graphics file. From this saved single screen I would like to know the program info, version and date. Granted this data is on a second help screen, but I would prefer it to be on the main screen along with tabular data and plotted data. Thanks Stan, W1LECape Cod FN41sr Mark Sims wrote: Lady Heather is undergoing her periodic trip to the beauty parlor. A few new gratuitous features have already crept in: * You can specify a time/date for the program to exit * The satellite elevation shows if the satellite is rising or setting * You can show the times in your local time zone * Periods of holdover are flagged in the plot * The tbolt version and serial info is written to the log file * You can specify command line options in a .CFG file Now would be a good time to suggest any new features that you can't live without... _ Microsoft brings you a new way to search the web. Try Bing™ now http://www.bing.com?form=MFEHPGpubl=WLHMTAGcrea=TEXT_MFEHPG_Core_tagline_try_bing_1x1 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] LF power supply noise
Magnus wrote: I has issues with the big permanent magnet of one of my speakers made one of my screens going all strange in colours. I had some backsides from a pair of racks which I put inbetween, and the steel was doing a good job as finding a better path for the magnetic fields than through my screen. Maybe you should put a few slabs of steel around that HP543310A to at least guide most of the magnetic fields back into the core. Cheers, Magnus I was wondering where that funny HP number came from. The HP543310A was from your post above, and I just copied and pasted it everywhere as needed. Then you blamed me for the mistake! Way to go Magnus. I'll check things a bit more carefully now. Regards, Mike ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Ideas for a long-wave receiver sought
Are you doing DGPS? An an alterative to the roll-your-own SDR, tou can build a direct conversion small receiver or IF converter with a SA602 chip, which contains a Gilbert cell mixer and a local oscillator. Here is a board that will do most of what you want, if you're willing to live with the SA602 limitation. http://home.att.net/~jacksonharbor/lfconv.htm You will get out of this board LO + (0 to 500 Khz), which you can the receive with an existing receiver that can receive the LO frequency. It comes with 4.0 and 10.0 MHz crystals. Here's an article about better input filtering against AM broadcast band interference, which will be useful for you no matter what route you take for LF and VLF reception. http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm There are many ham and non-hams who are using very low bit-rate signals in LF and VLF at micro power levels. As a result, they care about frequency stability, and some are building their own RX equipment. Here's a random sample: http://www.qrss.thersgb.net/Receiving-QRSS.html . Murray Greenman who is a member of this group did some pioneering work in VLF TX using the FE5680A as a transmitter, and he may have something to contribute on RX as well. If you need better phase noise and frequency stability, you won't get that from a product like the SA602, not the least because of its internal oscillator. You can build a receiver or IF converter yourself out of discrete mixers from Mini-Circuits, but you'll likely need a preamp as well as they generally require higher drive points (more loss), and output filters as well to deal with the image rejection. Leigh. Hi I want to build a small, cheap, yet precise long-wave receiver which can be tuned from the computer in the 2KHz - 200 KHz range (the intended use is to receive various time signal stations). Does a chip for such a receiver exist? Should I take the SDR route? I designed a DCF77 receivers some years ago, but I need something more flexible (and a bit more modern...) - Marc Balmer ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Introduction of Z38XX
Hi Ulrich, since our FireFly and Fury GPSDO's support GPSCon as well, I tried your plot program. We use 115.200 baud by default, but when I set your program to that speed, it defaults back to 57600 for some reason. Changing our board's baud rate fixed that problem. Our status output is shown properly in your status window (see below), and the *IDN? string is shown as well, but the program says the last smartclock status is undefined. What commands do you use to query the GPSDO that it may be getting hung up on? Your software looks quite nice, and It would be great if your software could support our units like GPSCon does. Thanks in advance, Said The status window in your software shows the following: :SYSTEM:STATUS? AQUISITION Tracking:10 Not Tracking: 3 PRN El Az SS PRN El Az 2 42 175 2414 0 331 4 59 119 2128 17 101 9 59 283 3351 44 156 12 27 30325 15 6 21811 17 36 4929 20 1 4719 26 18 26729 27 65 25033 48 45 19739 UTC 4:12:45 24 Jun 2009 LAT N 37:16:17.915 LON W 121:57:26.719 HGT 71.20 m (MSL) HEALTH MONITOR OCXO Current: OKEFC: OK GPS Receiver Status: 3D Fix 1PPS SOURCE MODE : GPS 1PPS SOURCE STATE : GPS GPSDO Status : Locked In a message dated 6/23/2009 02:29:05 Pacific Daylight Time, df...@ulrich-bangert.de writes: Z38XX talks to the Z3801/5/16 with a exact 10 s time base which means the PPS TI delivered can be used for the computation of Allan deviation (and other measures) of the internal phase comparator with a Tau0 = 10 s (which is done internally in Z38XX similar as in Lady Heather). The sat's horizont line in the Azimuth / Elevation chart will look strange in the first hours after program start. Give it some days until it looks as attched or even better. Have fun Ulrich Bangert ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
