Re: [time-nuts] HP 3586B Selective Level Meter

2012-07-28 Thread Robert Benward
Chuck, Got two of these guys, the B and the C. The C is the desirable one, 50ohms, but you will pay about three times the price. Use the adapter, it's $16 from the link below, it just isn't worth taking apart. Also, you will need a 50ohm BNC feed thru termination, then set the front panel

Re: [time-nuts] FE-5680A adjustment screw?

2012-01-18 Thread Robert Benward
Sent: Wednesday, January 18, 2012 1:34 AM Subject: Re: [time-nuts] FE-5680A adjustment screw? On Tue, Jan 17, 2012 at 7:00 PM, Robert Benward rbenw...@verizon.net wrote: Hi all, Anyone know what the little adjustment hole is on the side of the FE-5680A? Is this a frequency adjustment? I tried

Re: [time-nuts] FE-5680A won't lock

2012-01-18 Thread Robert Benward
It would be interesting to see if you can remotely mount the Rb lamp. The high temps certainly do nothing for the long term reliability of the electronics. A fan is a good start. Bob - Original Message - From: Peter Gottlieb n...@verizon.net To: time-nuts@febo.com Sent: Wednesday,

Re: [time-nuts] FE-5680A won't lock

2012-01-18 Thread Robert Benward
I got my first one from nichegeek and it took a long time to lock. Someone suggested I adjust C217 which worked, but if I jarr the oscillator it will go out of lock, and may or may not relock so it's still not up to 100%. I'm going to use this as my experimental unit for EFC and the like.

[time-nuts] FE-5680A adjustment screw?

2012-01-17 Thread Robert Benward
Hi all, Anyone know what the little adjustment hole is on the side of the FE-5680A? Is this a frequency adjustment? I tried adjusting it but nothing happened. Was the adjustment range too small to see a change on a counter? Also, I just got another Z3805A. Although I had success adjusting

Re: [time-nuts] Adding adjustment pot to 5680

2012-01-11 Thread Robert Benward
Arthur, 800mW will give you a 52C rise in junction temperature over ambient when not mounted to anything. The 5680s get pretty hot, probably 50C internally (has anyone measured it?). That will put you at 102C. Make sure the flavor of 7805 you selected is rated for that (most are rated for

Re: [time-nuts] HP Z3817A Reverse Engineering

2012-01-09 Thread Robert Benward
' E1938, have you grabbed the schematics and circuit description from http://www.prc68.com/I/HPE1938.shtml ? Ed On 1/8/2012 5:58 PM, Robert Benward wrote: Hi Ed, May I ask where did you get your STLN4096A and what you paid for it? Do they have any more? My E1938 recently crapped out

Re: [time-nuts] HP Z3817A Reverse Engineering

2012-01-08 Thread Robert Benward
Hi Ed, May I ask where did you get your STLN4096A and what you paid for it? Do they have any more? My E1938 recently crapped out. If I put a substitute 10MHz near the first buffer, the PIC processor comes alive, then I can remove the 10MHz and it begins to oscillate on it's own. I can

Re: [time-nuts] FE-5680A performance - 1 PPS output issue

2012-01-05 Thread Robert Benward
You've had more progress than I did, I don't get anything out of pin 6. I did see the levels toggle, but that was about it. On various websites I read to get exactly 1pps, you need a programmable 5680 because it needs to be set to something like 8.388MHz (2^23) to divide down properly. I

Re: [time-nuts] FE 5680a 3pay 36.89 includes shipping. Finally ordered one

2012-01-03 Thread Robert Benward
I got mine for around $25 in a regular bidding affair. Mine had trouble locking, It only locked a handful of times, and that took forever, but most of the time it just sat there and cooked. The seller replaced it and the new locks up in 2 or 3 minutes. I did not have to ship the old one

Re: [time-nuts] FE 5680a 3pay 36.89 includes shipping. Finally ordered one

2012-01-03 Thread Robert Benward
Peter, Sure, If I can have a copy of what you produce. Send me your address. I assume you are in the US? If you look on Ebay, this is one of those that was mounted on a PCB with an aux 68MHz osc and DB9 connector. Bob - Original Message - From: Peter Gottlieb n...@verizon.net

Re: [time-nuts] FE 5680a 3pay 36.89 includes shipping. Finally ordered one

2012-01-03 Thread Robert Benward
Subject: Re: [time-nuts] FE 5680a 3pay 36.89 includes shipping. Finally ordered one On 1/3/2012 8:20 AM, Robert Benward wrote: I got mine for around $25 in a regular bidding affair. Mine had trouble locking, It only locked a handful of times, and that took forever, but most of the time

[time-nuts] Z3801A EFC error

2012-01-02 Thread Robert Benward
To Jarl and others, A few months ago I wrote about my Z3801A having a EFC error and an inability to generate a lock. With the help of Jarl and others, I was able to correct the situation. I simply disassembled the double oven (what a mess!) and made a manual adjustment to the frequency.

Re: [time-nuts] Z3801 EFC error

2011-11-01 Thread Robert Benward
Joe, Good guess. It's a 10811 with an additional oven wrapped around it for better thermal control. I'll check it in a couple days when I get home. Is this thermal fuse on the outside? Anyone have a schematic of this unit? Bob - Original Message - From: J. L. Trantham

Re: [time-nuts] WeirdStuff tbolt $75

2010-09-03 Thread Robert Benward
Robert Benward rbenw...@verizon.net: Leigh, What was your search term? The link does not produce anything. Bob - Original Message - From: Leigh L. Klotz, Jr WA5ZNU le...@wa5znu.org To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent

Re: [time-nuts] WeirdStuff tbolt $75

2010-09-02 Thread Robert Benward
Leigh, What was your search term? The link does not produce anything. Bob - Original Message - From: Leigh L. Klotz, Jr WA5ZNU le...@wa5znu.org To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 02, 2010 12:06 PM Subject:

Re: [time-nuts] Advise on HP/Agilent 54111D

2010-08-30 Thread Robert Benward
Jason Be carefull with some of the older digital scopes, some them only sampled at a low rate, yet boasting front ends of hundreds of MHz. You need to look for sampling rate in hundreds of mega-samples per second to get real time performance. This particular scope is 1G/S but only 8K memory

Re: [time-nuts] HP-3586B receiver...

2010-07-24 Thread Robert Benward
Burt I believe the voltmeter is calibrated for 75 ohms, not 50, otherwise they are very similar. You can apply a dB offset to correct for the measurement error, run the input at 10Kohms, and use a 50ohm feedthrough termination. I own both (the B is has problems now), but I use the voltage

Re: [time-nuts] HP-3586B Tunable Voltmeter...

2010-07-24 Thread Robert Benward
of the A being a 50 Ohm instrument. I have a pdf service manual for the A,B C instruments. Do you need a copy for working on your B? What kind of problems does your B have? I've repaired a few and have a little knowledge in repairing them. Burt From: Robert Benward rbenw...@verizon.net

Re: [time-nuts] Yet another GPSDO - locking to 10MHz

2010-06-27 Thread Robert Benward
All this talk about interpolation reminds me of a little neat chip by Analog Devices, AD9500. It's programmable digital delay, bit, with lops resolution with a loons full-scale range. I believe (from app notes) you can push it to 100us FS, giving 390ns resolution. I think the minimum jitter

Re: [time-nuts] Substitute GPS in a Z3801A

2010-06-25 Thread Robert Benward
OK, I'll give you that. But, how does it account for the rapid change in slope, or the abrupt change for that matter? It doesn't look like an aging crstal to me (maybe one with a problem that jumps in freq). For the most part, there is no jumping DURING the slope, it seems to change on the

Re: [time-nuts] Clearing the data in Z38XX software

2010-06-24 Thread Robert Benward
that hold data worth one calendar week and that the calendar week's number is clearly to be recognized in the filename. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Robert Benward Gesendet: Donnerstag

Re: [time-nuts] Substitute GPS in a Z3801A

2010-06-24 Thread Robert Benward
...@flatsurface.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, June 24, 2010 9:01 AM Subject: Re: [time-nuts] Substitute GPS in a Z3801A At 10:48 PM 6/23/2010, Robert Benward wrote... Has anyone ever put another GPS in a Z3801A? Will the software

Re: [time-nuts] Substitute GPS in a Z3801A

2010-06-24 Thread Robert Benward
I really don't have anything to cause multipath from where I'm situated. The minimum number of sats I track is 4 and the max is 12 on a day, night cycle and the average is about 6. Steve On 25 June 2010 02:01, Robert Benward rbenw...@verizon.net wrote: Mike, Thanks for the info!. Does anyone

Re: [time-nuts] Substitute GPS in a Z3801A

2010-06-24 Thread Robert Benward
When you say you changed location, are we speaking of moving the antenna to the other side of the roof, or across town? Sounds suspciously like interference. Bob - Original Message - From: Matthew Kaufman matt...@matthew.at To: Discussion of precise time and frequency measurement

Re: [time-nuts] Substitute GPS in a Z3801A

2010-06-24 Thread Robert Benward
of those are quite low horizon, although I really don't have anything to cause multipath from where I'm situated. The minimum number of sats I track is 4 and the max is 12 on a day, night cycle and the average is about 6. Steve On 25 June 2010 02:01, Robert Benward rbenw...@verizon.net wrote: Mike

Re: [time-nuts] Substitute GPS in a Z3801A

2010-06-24 Thread Robert Benward
is currently tracking 9 birds but 3 of those are quite low horizon, although I really don't have anything to cause multipath from where I'm situated. The minimum number of sats I track is 4 and the max is 12 on a day, night cycle and the average is about 6. Steve On 25 June 2010 02:01, Robert Benward rbenw

[time-nuts] Substitute GPS in a Z3801A

2010-06-23 Thread Robert Benward
Has anyone ever put another GPS in a Z3801A? Will the software accommodate another GPS that tracks say, 12 channels? Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] crystal oscillators TPLL

2010-06-22 Thread Robert Benward
So now we, those that want a little more than faith, are nuts. Some day when you learn how to speak to people with respect, you too may get some respect of your own. Never argue with a fool, onlookers may not know the difference. Never wrestle with a pig, you will only get dirty, and the pig

Re: [time-nuts] crystal oscillators TPLL

2010-06-22 Thread Robert Benward
After reading the content in some of your private emails to me, and hearing you call others derogatory names, it is obvious you tend speak to others with disdain and disrespect. I'm not convinced you were refering to us as in an endearing manner. Bob - Original Message - From:

Re: [time-nuts] crystal oscillators TPLL

2010-06-22 Thread Robert Benward
Steve, It is admirable that you stick up for Warren. Part of Warren's problem is his disrespect for some of the other commenters of his work. The name calling and put downs just does not endear him to anyone. Saying to someone that they made a dumb mistake, and if they can't see the obvious

Re: [time-nuts] crystal oscillators

2010-06-21 Thread Robert Benward
Great tutorial, 300 pages worth! Thanks, Bob - Original Message - From: Don Latham d...@montana.com To: time nuts time-nuts@febo.com Sent: Monday, June 21, 2010 7:46 PM Subject: [time-nuts] crystal oscillators I just found this while noodling around. Looks very good, probably

Re: [time-nuts] (no subject)

2010-06-20 Thread Robert Benward
looking for someone else to fix it for you (your postings need clarifying)? Steve On 20 June 2010 16:23, Robert Benward rbenw...@verizon.net wrote: Adrian, I have all this stuff. I really don't want to open this thing up, and my oscillator trouble shooting skills are not that great

Re: [time-nuts] Advantages Disadvantages of the TPLL Method

2010-06-20 Thread Robert Benward
this one. On 20 June 2010 04:36, Robert Benward rbenw...@verizon.net wrote: Warren, I was responding to ke5fx comment using a 12-bit, 480-Hz serial DAQ in place of the voltage-to-frequency converter in the diagram above. A DAQ is a multifaceted data acquisition system, where as in your

Re: [time-nuts] (no subject)

2010-06-20 Thread Robert Benward
...@febo.com] On Behalf Of Robert Benward Sent: Sunday, June 20, 2010 8:53 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] (no subject) Steve, I was looking for insight. For instance, is there a power up sequence for the +5 +12V? Anything I can

Re: [time-nuts] AVAR Femtoseconds

2010-06-20 Thread Robert Benward
, Robert Benward wrote: Steve, I am a professional engineer, but in this arena I am an amateur. That is why I'm asking the questions, not to put down, but to understand some of the claims made. And as I said in one of my previous emails, I've seen amateurs run circles around

Re: [time-nuts] Advantages Disadvantages of the TPLL Method

2010-06-19 Thread Robert Benward
to try and answer your question on digital logic which was: How do you do fs when most digital logic has jitter several of orders of magnitude greater? ws *** [time-nuts] Advantages Disadvantages of the TPLL Method Robert Benward rbenward at verizon.net Sat Jun

Re: [time-nuts] Advantages Disadvantages of the TPLL Method

2010-06-19 Thread Robert Benward
and learned by my past mistakers and stuck to the TPLL performance issues. Which TPLL graph or plot do you not understand? You need to ask the experts about the rest. ws [time-nuts] Advantages Disadvantages of the TPLL Method Robert Benward rbenward at verizon.net

Re: [time-nuts] Advantages Disadvantages of the TPLL Method

2010-06-19 Thread Robert Benward
Hi Pete, I calculated about 0.5uV/V for 10fs, so we are on the same page. I will need to read this several times for it to sink in, but I much appreciate the calculations and technical reply! Thanks! Bob - Original Message - From: Pete Rawson To: Discussion of precise time

[time-nuts] (no subject)

2010-06-19 Thread Robert Benward
All, Anybody out there know how to fix an E1938 oscillator? Something in the metal can has crapped out. No 10MHz, and in turn, no processor action. It worked a few months ago, turn it on today, and worked after about an hour. Turned it on again this evening and nothing. I would hate to take

Re: [time-nuts] (no subject)

2010-06-19 Thread Robert Benward
Subject: Re: [time-nuts] (no subject) Bob, guess you know that detailed documentaion is available here: http://www.prc68.com/I/HPE1938.shtml http://www.leapsecond.com/museum/e1938a/ Open the can and report back! Adrian Robert Benward schrieb: All, Anybody out there know how

Re: [time-nuts] Galvanic decoupling of GPS antenna

2010-06-18 Thread Robert Benward
I don't think the shield is rated for +/-250V, and I'm not sure I would want to handle RG-58 with 250V on the shield.If you do this, use triax cable and ground the outter shield, and make sure the breaker can interrupt the fault current (if the fault currrent is in the hundreds, or even

Re: [time-nuts] Galvanic decoupling of GPS antenna

2010-06-18 Thread Robert Benward
: jimlux jim...@earthlink.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, June 18, 2010 10:23 AM Subject: Re: [time-nuts] Galvanic decoupling of GPS antenna Robert Benward wrote: I don't think the shield is rated for +/-250V, and I'm not sure I would want

Re: [time-nuts] Galvanic decoupling of GPS antenna

2010-06-18 Thread Robert Benward
boiler, then BX is acceptable. Bob - Original Message - From: jimlux jim...@earthlink.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, June 18, 2010 1:46 PM Subject: Re: [time-nuts] Galvanic decoupling of GPS antenna Robert Benward wrote

Re: [time-nuts] Advantages Disadvantages of the TPLL Method

2010-06-18 Thread Robert Benward
Warren, I'm a newbie, so can you explain it to me? Femto anything is something mostly reserved for a well equipped lab. How do you do it when most digital logic has jitter several of orders of magnitude greater? Bob - Original Message - From: WarrenS warrensjmail-...@yahoo.com

Re: [time-nuts] Advantages Disadvantages of the TPLL Method

2010-06-18 Thread Robert Benward
for a well equipped lab. How do you do it when most digital logic has jitter several of orders of magnitude greater? Bob * [time-nuts] Advantages Disadvantages of the TPLL Method Robert Benward rbenward at verizon.net Fri Jun 18 20:23:40 UTC 2010 Previous message: [time-nuts

Re: [time-nuts] Galvanic decoupling of GPS antenna

2010-06-17 Thread Robert Benward
Yuri, Another suggestion would be to look for a low power GPS; I can't image with all the GPSs out there in all those cell phones, that they all take 40mA or more. If you find one that does have low power, then locate it at the antenna and then you won't need an active antenna. (canabalize a

Re: [time-nuts] Galvanic decoupling of GPS antenna

2010-06-16 Thread Robert Benward
Yuri, Why don't you get a small GPS and keep it with the antenna, and isolate the digital side of the GPS with opto couplers? Supply power to the GPS, and the GPS supplies power to the antenna. Optically couple the digital side to your controller. The RF transformer you might come across

[time-nuts] Allan Deviation

2010-06-15 Thread Robert Benward
Hi All, How does one measure allan deviation? How does my computer measure the stability of an oscillator? Is this coming from the Z3801A? Thanks, Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] 5061A Problem Child

2010-06-15 Thread Robert Benward
A VHF scanner might work as well. Use a scope on the audio. Alternately, I have purchased modulation analyzers real cheap on EBAY. Bob - Original Message - From: Didier Juges did...@cox.net To: Time-Nuts time-nuts@febo.com Sent: Tuesday, June 15, 2010 10:54 PM Subject: Re:

Re: [time-nuts] 5061A Problem Child

2010-06-15 Thread Robert Benward
Charles wrote: I like Didier's suggestion of the FM tuner, but the phase modulation will need to be substantial to detect it that way. The deviation (modulation index) of a FM broadcast signal is very large, on the order of +/-75KHz. The phase modulation will need to produce large frequency

Re: [time-nuts] 5061A Problem Child

2010-06-14 Thread Robert Benward
Re-seat all of the boards several times. Just to eliminate oxidation as a possible cause. Bob - Original Message - From: J. L. Trantham jlt...@att.net To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Sunday, June 13, 2010 11:31 PM Subject: Re:

Re: [time-nuts] Odd FTS 4060 Behavior

2010-06-14 Thread Robert Benward
Gold doesn't always solder that well either. Yes, it doesn't oxidize, but often in a production environment, we dip the leads and pre-tin them just to make sure they take in the wave. Bob - Original Message - From: Hal Murray hmur...@megapathdsl.net To: Discussion of precise time

Re: [time-nuts] My stubborn Z3801A

2010-06-14 Thread Robert Benward
: [time-nuts] My stubborn Z3801A It's in the same menu where you start / stop communication, just below the 'Port Open' command. CommPort Settings Baud Rate Adrian Robert Benward schrieb: The minimum voltage is +/-3 volts, I'm getting about +/-6 right now. How does one change the serial

Re: [time-nuts] My stubborn Z3801A

2010-06-14 Thread Robert Benward
be established, and the main form should begin to periodically update every few seconds. Shoot me a PM if you don't have the manual. Btw. I've now installed Ulrich's superb Z38XX that is much more versatile than the basic SatStat. Adrian Robert Benward schrieb: Adrian, I thought

[time-nuts] My stubborn Z3801A

2010-06-13 Thread Robert Benward
To All, An update to my Z3801A saga. Summary: As you know, I purchased this Z3801A at the Dayton Hamfest. The person who sold it to me said it was modified for RS-232. I powered the unit up and the only thing it ever did was go into the holdover mode. Tried hooking RS-232, but got no

Re: [time-nuts] My stubborn Z3801A

2010-06-13 Thread Robert Benward
-Original Message- From: Robert Benward rbenw...@verizon.net Sent: Jun 13, 2010 8:01 PM To: time-nuts time-nuts@febo.com Subject: [time-nuts] My stubborn Z3801A To All, An update to my Z3801A saga. Summary: As you know, I purchased this Z3801A at the Dayton Hamfest. The person who sold

Re: [time-nuts] My stubborn Z3801A

2010-06-13 Thread Robert Benward
The minimum voltage is +/-3 volts, I'm getting about +/-6 right now. How does one change the serial port speed, I don't see anything in SatStat. Bob - Original Message - From: John Miles jmi...@pop.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent:

Re: [time-nuts] HP 3458A schematic/service manual request

2010-06-07 Thread Robert Benward
Hi Jeff, I checked the Agilent website, and I assume you did also. There is no schematic to be had. What I have discovered with Agilent, is that certain instruments are made by particular divisions. Some of those divisions consider those schematics to be proprietary and they will not release

Re: [time-nuts] Z3816a

2010-06-06 Thread Robert Benward
on ADEV at tau = 1 second. In a very stable environment the rare 10811 with the 5x10^-13 at 1 second crystal will beat most of the production 10811's or 1938's. It's sort of luck of the draw in that respect. Bob On Jun 5, 2010, at 11:31 PM, Robert Benward wrote: Joe, Thank you for your inputs

Re: [time-nuts] Z3816a

2010-06-05 Thread Robert Benward
) and the other powered by 120 VAC. I don't know about the Z3815A. Good luck, Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Robert Benward Sent: Friday, June 04, 2010 7:13 PM To: time-nuts Subject: [time-nuts] Z3816a Hi All

Re: [time-nuts] Flood of low end priced VNAs on FleeBay

2010-06-02 Thread Robert Benward
I've fix a few pieces of HP equipment simply by re-seating all the PCBs. After all the years, sometimes not in the best humidity environment, those contacts can become intermittant. Re-seating will wipe all the contact surfaces restoring continuity. Bob - Original Message - From:

Re: [time-nuts] Motorola GPS Z3801A

2010-06-02 Thread Robert Benward
02, 2010 12:49 AM Subject: Re: [time-nuts] Motorola GPS Z3801A Robert Benward wrote: Matt, It's been modified. I was told that when I bought it, and confirmed it myself. I don't get the right voltages; I need a new RS-232 interface chip. Bob I never heard an answer about if you had

Re: [time-nuts] Motorola GPS Z3801A

2010-06-02 Thread Robert Benward
Sent: Wednesday, June 02, 2010 12:50 AM Subject: Re: [time-nuts] Motorola GPS Z3801A Robert Benward wrote: Matt, It's been modified. I was told that when I bought it, and confirmed it myself. I don't get the right voltages; I need a new RS-232 interface chip. Did you double-check the mod

[time-nuts] Motorola GPS Z3801A

2010-06-01 Thread Robert Benward
Hi, Does anyone have the pinouts for the Motorola GPS within the Z3801A? It's a ten pin header and I would like to intercept the data stream to see if it's working. Also, I read about some of the Motorolas putting out binary data, not NEMA protocol. Thanks, Bob

Re: [time-nuts] Motorola GPS Z3801A

2010-06-01 Thread Robert Benward
antennas, or a bad Z3801A (beyond the RS-232). Thanks again, Bob - Original Message - From: Rex r...@sonic.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, June 01, 2010 8:28 PM Subject: Re: [time-nuts] Motorola GPS Z3801A Robert Benward

Re: [time-nuts] Motorola GPS Z3801A

2010-06-01 Thread Robert Benward
measurement time-nuts@febo.com Sent: Tuesday, June 01, 2010 8:28 PM Subject: Re: [time-nuts] Motorola GPS Z3801A Robert Benward wrote: Hi, Does anyone have the pinouts for the Motorola GPS within the Z3801A? It's a ten pin header and I would like to intercept the data stream to see if it's

Re: [time-nuts] Motorola GPS Z3801A

2010-06-01 Thread Robert Benward
of the Motorola Oncore VP receiver. Manual is at http://www.ko4bb.com/Manuals/05)_GPS_Timing/OncoreVPZ.pdf Robert Benward wrote: Hi, Does anyone have the pinouts for the Motorola GPS within the Z3801A? It's a ten pin header and I would like to intercept the data stream to see if it's working. Also

Re: [time-nuts] Training period for a Rb clock using GPS

2010-06-01 Thread Robert Benward
Abhay, The microprocessor learns the drift of the oscillator while it is connected, so that when GPS is lost, it can make those corrections in anticipation of drift. The longer it's locked to GPS, the better it learns the drift (more history). Don't confuse the word drift with locked, even

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-24 Thread Robert Benward
difficult. In addition to the wiring options you can (obviously) have either a male or female on either end. There are so many odd pieces of gear out there that you can have pretty much any combination. Bob On May 23, 2010, at 11:22 PM, Robert Benward wrote: My experience with the term straight

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-24 Thread Robert Benward
of precise time and frequency measurement time-nuts@febo.com Sent: Monday, May 24, 2010 10:01 AM Subject: Re: [time-nuts] Z3805 utility, Was: AW: (no subject) On 25 May 2010 00:20, Robert Benward rbenw...@verizon.net wrote: Steve, If you are worried about ground loops you should be using RS-422. I can

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-24 Thread Robert Benward
: (no subject) Bob, On 25 May 2010 00:27, Robert Benward rbenw...@verizon.net wrote: Bob, I just went out an ordered a bunch of gender changers and null modem cables, and a DB9 tester (with a NM switch!). I started doing the same as you, using a sharpie to mark my cable. An update, the unit has

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-24 Thread Robert Benward
Ah man!!! I had some of those red APC UPS cables!!! Drove me crazy!!! Bob - Original Message - From: Hal Murray hmur...@megapathdsl.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, May 24, 2010 2:51 PM Subject: Re: [time-nuts] Z3805

Re: [time-nuts] Thunderbolt, Rb, Scopes at SF Bay Maker Faire this weekend

2010-05-24 Thread Robert Benward
This outreach to the public stuff can be quite gratifying. My astronomy club used to do it all the time, as the ham operators. ARRL field day is coming up in June. Good job! Bob - Original Message - From: Leigh L. Klotz, Jr. WA5ZNU le...@wa5znu.org To: Discussion of precise time

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
exactly but I don't remember the day that I made the cable and I currently cannot access the back of my Z3805. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Robert Benward Gesendet: Sonntag, 23. Mai

[time-nuts] (no subject)

2010-05-23 Thread Robert Benward
Hi All, Does anyone have a manual for this Z3805A? Schematics? Thanks, Bob ___ 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] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
on the early 3805's. Bob On May 23, 2010, at 11:30 AM, Robert Benward wrote: Ulrich, On pin 2 of the DB9, I get -0.5V, and on pin 3 (TX) I get +2.0V. Doesn't sound good. I have a 3805 that has only the bottom DB25 connector. The person who sold it to me made a 3 wire cable, DB25 to DB9, with pins

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
OK, It does flash, then it sequences. I guess that's a start. I suspect it's been a long time since it's been on, this was the previous owner's spare. As far as location, I bought it at the Dayton Hamfest, so it could be anywhere from New York or Pennsylvania, to as far as the midwest for

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
, 2010, at 3:02 PM, Robert Benward wrote: OK, It does flash, then it sequences. I guess that's a start. I suspect it's been a long time since it's been on, this was the previous owner's spare. As far as location, I bought it at the Dayton Hamfest, so it could be anywhere from New York

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
(or two...). I'd hit Linear up for a sample of the converter chip. Bob On May 23, 2010, at 4:12 PM, Robert Benward wrote: Bob, I have an update! Possibly some good news. After a few hours of nothing, I unplugged the antenna, and the hold over light came on! So something happened

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
Jeff, Generally for a given DTE, there is a swap of 23 when going from DB9 to DB25 and vice-versa. For a normal serial cable, DTE to DCE, pins 23 are swapped. RS-232 states that pin 2 is the TX data, DCE or DTE, on a DB25. It's TX on pin 3 for a DB9. Therefore to hook a DCE to a DTE, you

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
Jeff, A plain serial cable will have 23 swapped, a straight through is 2-2 and 3-3. There were a lot of DB25 to DB25 that were NOT serial cables, they were just 25 pin cable using DB9. Bob - Original Message - From: Jeff Hook jeffh...@comcast.net To: Discussion of precise time and

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
- From: Robert Benward rbenw...@verizon.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, May 23, 2010 4:41 PM Subject: Re: [time-nuts] Z3805 utility, Was: AW: (no subject) Jeff, A plain serial cable will have 23 swapped, a straight through is 2-2

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
It runs thru all baud rates, trying to communicat with the 38xx You could give that a try. Jeff - Original Message - From: Robert Benward rbenw...@verizon.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, May 23, 2010 4:41 PM Subject: Re

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
. Their is also a program called GPS-dos2 that you can download from http://www.realhamradio.com/gps-satstat-software.htm It runs thru all baud rates, trying to communicat with the 38xx You could give that a try. Jeff - Original Message - From: Robert Benward rbenw...@verizon.net To: Discussion

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
OK. I think I know where some of this confusion I'm having is coming from.. All these descriptions are misleading in that they (Wiki) call pin 2 TX. On wiki's page, both DCE and DTE are TX=2. The table below shows the same except that TX is defined from the DTE's point of view. Thus DTE to

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
My previous email is my mea culpa The box is now in holdover mode. I don't what that means, it's been running for a few hours now. Bob - Original Message - From: Jeff Hook jeffh...@comcast.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent:

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
My experience with the term straight through is that I've seen RS-232 cable that have the ground pin connected to the shell. In a straight through the pins are one to one and the only thing connected to the shell would be the shield if one is available. Bob - Original Message -

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-23 Thread Robert Benward
to the confusion. Bob - Original Message - From: Mike S mi...@flatsurface.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, May 23, 2010 10:29 PM Subject: Re: [time-nuts] Z3805 utility, Was: AW: (no subject) At 09:27 PM 5/23/2010, Robert Benward

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-22 Thread Robert Benward
-Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Robert Benward Gesendet: Samstag, 22. Mai 2010 03:15 An: time-nuts@febo.com Betreff: [time-nuts] (no subject) Hi, I just purchased a Z3805A at the Dayton hamfest this past weekend. How

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-22 Thread Robert Benward
. Everything is warm, but nothing else. Any ideas? Bob - Original Message - From: Robert Benward rbenw...@verizon.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Saturday, May 22, 2010 9:49 AM Subject: Re: [time-nuts] Z3805 utility, Was: AW

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

2010-05-22 Thread Robert Benward
Hawkins -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Robert Benward Sent: Saturday, May 22, 2010 2:08 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3805 utility, Was: AW: (no subject) Hi All, I

[time-nuts] (no subject)

2010-05-21 Thread Robert Benward
Hi, I just purchased a Z3805A at the Dayton hamfest this past weekend. How do I get it to work? Do I need software to run this, or can it run stand alone. I have turned it on, but only the power light comes on, the GPS lock, and more importantly, the enable light is not on. There is an 10MHz

Re: [time-nuts] (no subject)

2010-05-21 Thread Robert Benward
on the net. Hope that helps a bit. -Rex Robert Benward wrote: Hi, I just purchased a Z3805A at the Dayton hamfest this past weekend. How do I get it to work? Do I need software to run this, or can it run stand alone. I have turned it on, but only the power light comes on, the GPS lock