Re: [time-nuts] Lassen IQ receiver APRS beacon pictures
On Sun, Oct 12, 2008 at 9:23 PM, Mike Monett <[EMAIL PROTECTED]> wrote: > Here's the board: http://www.losalamostech.com/gps_board.jpg > > Thanks - that gives a good idea how bug the GPS is. > > But don't the connectors add a lot of weight? > It adds some weight. I have another board with a Lassen SQ receiver that I'll probably end up using for the balloon project. > > > Here's their gadget: > > >http://www.lanl.gov/orgs/tt/pdf/techs/hands_off_gun.pdf > > Shades of Star Trek. We can see it happening right before our eyes. Yep, and it was designed nearly 5 years ago. My company got the contract to clone the device and design/build anything that was impossible to find. Our clones were sent out as demo units by the technology transfer group at the lab. I guess it's so companies can license the technology and develop commercial units. We made one clear, and one transparent blue. The most fun was polishing up the parts that were made on an ObJet printer. They were yellow but polished up clear. Very cool. > > >> 2. How well do they work indoors? Do you have to be near a > >> window? What about inside a multi-story building? > I've been running it for the past 24 hours with the antenna in a west facing window. I'm picking up 4-5 satellites and only getting a 2D fix. 6 allows for a 3D fix, but it might be more of a reception issue than number of satellites. I would think 4 would be sufficient. > >> 4. Have you ever taken the shield off and looked inside? If so, > >> can you see the crystal oscillator and tell whether it is a bare > >> crystal or a complete oscillator module? > http://www.nerdhouse.org/gallery/v/gps I'm very interested in antennas these days. I know nothing about > them, but find they can have a lot to do with time errors. Such as > multipath from passing cars. > > What happens if a pigeon sits on your GPS antenna? > I imagine that it would attenuate the signal sufficiently to lose a fix, but the realtime clock would take over. I setup the Lassen iQ to only give a PPS signal when it has a satellite fix so in this case, it should stop. > The really interesting thing is that the manual states that the > > PPS output is within 50ns of reality. I plan on using one to > > discipline that Efratom rubidium standard I was asking about > > earlier in the week. By the way, the connector from Mouser > > electronics came in and I'm ready to go, just waiting on the part > > to come in from China. > > Me too! I just got news that my rubidium has already shipped, which > is surprising. PayPal hasn't cleared yet, so I guess he has a lot of > confidence in the system. > > Which Efratom do you have? And who are you dealing with in China? > It's an Efratom FRS-C purchased on eBay from "fluke.l", http://myworld.ebay.com/fluke.l/ He's got nearly 500 positive feedback ratings so I figure it's a good risk. $100 delivered. A couple weeks ago I picked up an HP time mark generator for calibrating my oscilloscopes. It has a 10MHz TCXO inside but can accept an external 10MHz reference source. Buttons on the front divide the signal, there's also an amplifier built in, etc. So before adjusting anything on the scope, but after hooking it up and playing with it, I started wondering how accurate it was -nevermind the parallax error associated with using my Mk. I eyeball viewing the CRT! Then I started thinking about calibrating it against another time mark generator I had in the cabinet and wondered how I could know if that was accurate. Then I started thinking about how I could trust any clocks and to what precision I need for my measurements. I guess I caught the bug late in the game but when I got it, it hit rather fast. Today I was questioning why the PPS period of this GPS was reading 1.02527 seconds (it was fluctuating by about 300ns too!) on an HP frequency counter from the 80s. Using the PPS signal to gate it I was getting 10,000,0025 to 10,000,027 counts pretty consistantly using the internal 10MHz source. Sounds like it needs adjustment, but I don't dare fiddle with it till I feel a lot more comfortable in this area. The good news? Both the time mark generator and the frequency counter will accept a 10MHz source. The Efratom unit spits out a 10MHz TTL signal that should be just fine, especially after using a GPS PPS signal for feedback. I have a lot to learn in this area but thankfully my business partner knows a lot about this stuff. He was one of the Navy/DoD electronics weenies that serviced *the* clocks and was responsible for portable units in case ground stations were destroyed. This would allow for surface fleets to contact subs, and military coordination in general in the case of nuclear war. A true keeper of the time during the late 80s early 90s. -Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.co
Re: [time-nuts] Lassen IQ receiver
"Morris Odell" <[EMAIL PROTECTED]> wrote: > Hi Mike, > The Lassen IQ is a little PCB mounted 12 channel receiver about > half the size of a matchbox, which is intended for OEM > applications. It's not easy to open to see what's inside. It uses > tiny surface mount connectors to get signals in and out but > there's no access to the oscillator if you want to use an external > osc. It doesn't have a built in antenna so the performance depends > on the external antenna connected to it. It seems to handle > constellation changes quite well as far as I can see. The > application info says it can be used for navigation as well as > timekeeping. Thanks - that is good info. > It has 2 serial ports as well as a 1 pps output. One serial port > is used to control and read it using Trimble's TSIP binary > protocol. > There is free DOS and Windows software available from Trimble to > do this. The other port can be configured to use TSIP, NMEA or > Trimble's own ASCII protocol called TAIP. Very very good info. Thanks. > I paid AU$70 about 2 years ago, which at the time was equivalent > to about US$60. You could probably do better these days. I bought > a bunch of old 6 channel VP Oncore receivers about a year ago on > ebay for AU12 each. They are ideal for timing aplications and > clocks. I couldn't seem to find any VP, so I got two UP+. Are they usable? > HTH, > Morris Thanks for your help. Best Regards, Mike Monett ___ 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] Lassen IQ receiver APRS beacon pictures
Hi Robert "Robert Darlington" <[EMAIL PROTECTED]> wrote: > Hi Mike, I'll answer the questions in line with your email > message, below. [...] >> These units look interesting. Do you mind if I ask some questions? >> 1. What kind of non-time keeping uses have you found for them? > The first project was an APRS beacon for a high altitude balloon > project which hasn't launched yet, but was tested in my car. The > last project was for the local laboratory. They developed a > sampling system which had every gadget but the kitchen sink in it, > and every part was made out of unobtanium. In this case the gps > board had been discontinued for about 4 years so I had to design a > new one that would be the same physical size, same hole spacing, > and same pinout. That is very interesting. Making things fit can be fun! > I figured if I was going to do this and have a minimum run of 5 > boards, I was going to make 2 for me (they needed 3 total). In the > picture you'll see the top half with the GPS module has a white > box around it. This part I cut off after programming the GPS > receiver modules and installed in their gadget, the rest of the > board gave me a MAX232 (3.3 volt version if I remember right) and > broke out both serial ports to DB9 for easy hookup to a PC. I > should've added a PPS line but was too concerned with keeping the > board working when I cut it in half to really think about more > than what they needed. What you can't see is the button cell > battery on the back for retaining constellation data Too bad about losing the 1PPS. Maybe you can persuade them to get some spares. > Here's the board: http://www.losalamostech.com/gps_board.jpg Thanks - that gives a good idea how bug the GPS is. But don't the connectors add a lot of weight? > Here's their gadget: >http://www.lanl.gov/orgs/tt/pdf/techs/hands_off_gun.pdf Shades of Star Trek. We can see it happening right before our eyes. >> 2. How well do they work indoors? Do you have to be near a >> window? What about inside a multi-story building? > We only tried it outside. Their gadget got the short little > ceramic patch antenna. I used the longer (5 meter I think) mag > mount version in my car when testing the APRS beacon. I wonder about the GPS chips used in cellphones. Would they be suitable for this project? They might save some weight. >> 4. Have you ever taken the shield off and looked inside? If so, >> can you see the crystal oscillator and tell whether it is a bare >> crystal or a complete oscillator module? > No, but it comes off easy enough when not soldered down. I'll try > to pop mine open and take some pictures of the guts for you later > today. Thanks, I would really appreciate that. >> 5. How much do they cost? Do you know of any others that are >> cheaper? > We paid somewhere on the order of $50 + the antenna. Sparkfun > sells them here for $56: > http://www.sparkfun.com/commerce/product_info.php?products_id=163 Great - thanks for the link. > They also sell the antennas and breakout boards that already have > the tiny little surface mount sockets (I have a few left if you > end up buying one of these). I'm very interested in antennas these days. I know nothing about them, but find they can have a lot to do with time errors. Such as multipath from passing cars. What happens if a pigeon sits on your GPS antenna? > The really interesting thing is that the manual states that the > PPS output is within 50ns of reality. I plan on using one to > discipline that Efratom rubidium standard I was asking about > earlier in the week. By the way, the connector from Mouser > electronics came in and I'm ready to go, just waiting on the part > to come in from China. Me too! I just got news that my rubidium has already shipped, which is surprising. PayPal hasn't cleared yet, so I guess he has a lot of confidence in the system. Which Efratom do you have? And who are you dealing with in China? > -Bob >> Thanks for your help! Best Regards, Mike Monett ___ 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] Lassen IQ receiver
Hi Morris, The $ character should come before every NMEA sentence, and there should be several of these in each data burst. You probably can configure these modules to only have one, and that might be what you're seeing. Out of the box the Lassen IQ spits out about 10 lines every second, each beginning with the $ like this: $GPGGA,184050.84,3907.3839,N,12102.4772,W,1,05,1.8,00543,M*33 $GPRMC,184050.84,A,3907.3839,N,12102.4772,W,00.0,000.0,080301,15,E*54 $GPGSA,A,3,24,07,09,26,0503.6,01.8,03.1*05 $PMGNST,02.12,3,T,534,05.0,+03327,00*40 $GPGLL,3907.3839,N,12102.4771,W,184051.812,A*2D $GPGGA,184051.81,3907.3839,N,12102.4771,W,1,05,1.8,00543,M*34 $GPRMC,184051.81,A,3907.3839,N,12102.4771,W,00.0,000.0,080301,15,E*53 $GPGSA,A,3,24,07,09,26,0503.6,01.8,03.1*05 $GPGSV,3,1,08,07,57,045,43,09,48,303,48,04,44,144,,02,39,092,*7F $GPGSV,3,2,08,24,18,178,44,26,17,230,41,05,13,292,43,08,01,147,*75 $GPGSV,3,3,08*71 $GPGLL,3907.3840,N,12102.4770,W,184052.812,A*21 This was spit out of a Magellan GPS and found randomly on the net here: http://www.gpsinformation.org/dale/nmea.htm Hook up your gps and watch it with Hyperterm or your terminal program of choice. It should fire up and start spitting this stuff out. Can I ask what you're doing with it? Just curious. -Bob On Sat, Oct 11, 2008 at 5:51 AM, Morris Odell <[EMAIL PROTECTED]>wrote: > Thanks again Bob, > > Yes, that's what I thought it would do, but It doesn't seem to be so. My > micro is programmed to identify the beginning of an NMEA string by the $ > character and there's only one per sec. Maybe the second string is > concatenated onto the first one without the dollar symbol. > > Having said all that, in the time between my original post and this one I > managed to get the TAIP output working and the micro to recognise it so I'm > a happy man :-) > > Morris > > > Date: Sat, 11 Oct 2008 00:29:07 -0600 > > From: "Robert Darlington" <[EMAIL PROTECTED]> > > Subject: Re: [time-nuts] Lassen IQ receiver > >> > > As far as alternating, you'll get the various NMEA strings in the order > > you > > choose (and the strings you choose) once a second. You won't get one, > > then > > the other, then back to the first. It'll be several all at once, and > > that > > block will repeat once a second. I suppose you could select just the two > > you want, but they'd come in on the same data burst, repeating once a > > second. > > > > first string > > second string > > <1 second pause> > > first string > > second string > > <1 second pause> > > etc. > > > > I don't know for sure if you can have port 1 setup with a particular set > > of > > NMEA data strings and port 2 setup with a different set. Assuming you > > can't > > do that (meaning they have to be the same NMEA data), you can probably > > have > > both ports spit out everything you'd need and ignore what you don't need > > in > > software. > > > > -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. > ___ 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] Lassen IQ receiver
Hi Mike, I'll answer the questions in line with your email message, below... On Sat, Oct 11, 2008 at 12:40 AM, Mike Monett <[EMAIL PROTECTED]> wrote: > "Robert Darlington" <[EMAIL PROTECTED]> wrote: > > > I use them for non-time keeping things. You need to use the > > configuration tool to configure the ports so that they both spit > > out NMEA, and the particular NMEA strings you want to see, and > > then save the configuration. > > > Otherwise you get NMEA out of one port and the Trimble binary > > format out of the other. Do you have a copy of the software? You > > can find it here: > > >http://www.trimble.com/embeddedsystems/lasseniq.aspx?dtID=support > > > Also, make sure you have the IQ and not the SQ. The SQ only has > > one port but is otherwise pin compatible. > > Robert, > > These units look interesting. Do you mind if I ask some questions? > > 1. What kind of non-time keeping uses have you found for them? The first project was an APRS beacon for a high altitude balloon project which hasn't launched yet, but was tested in my car. The last project was for the local laboratory. They developed a sampling system which had every gadget but the kitchen sink in it, and every part was made out of unobtanium. In this case the gps board had been discontinued for about 4 years so I had to design a new one that would be the same physical size, same hole spacing, and same pinout. I figured if I was going to do this and have a minimum run of 5 boards, I was going to make 2 for me (they needed 3 total). In the picture you'll see the top half with the GPS module has a white box around it. This part I cut off after programming the GPS receiver modules and installed in their gadget, the rest of the board gave me a MAX232 (3.3 volt version if I remember right) and broke out both serial ports to DB9 for easy hookup to a PC. I should've added a PPS line but was too concerned with keeping the board working when I cut it in half to really think about more than what they needed. What you can't see is the button cell battery on the back for retaining constellation data Here's the board: http://www.losalamostech.com/gps_board.jpg Here's their gadget: http://www.*lanl* .gov/orgs/tt/pdf/techs/hands_off_gun.pdf > 2. How well do they work indoors? Do you have to be near a window? > What about inside a multi-story building? We only tried it outside. Their gadget got the short little ceramic patch antenna. I used the longer (5 meter I think) mag mount version in my car when testing the APRS beacon. > > > 3. How well do they handle constellation changes? Is there an abrupt > shift in position? > No clue! Sorry. > > 4. Have you ever taken the shield off and looked inside? If so, can > you see the crystal oscillator and tell whether it is a bare crystal > or a complete oscillator module? > No, but it comes off easy enough when not soldered down. I'll try to pop mine open and take some pictures of the guts for you later today. > > 5. How much do they cost? Do you know of any others that are > cheaper? > We paid somewhere on the order of $50 + the antenna. Sparkfun sells them here for $56: http://www.sparkfun.com/commerce/product_info.php?products_id=163 They also sell the antennas and breakout boards that already have the tiny little surface mount sockets (I have a few left if you end up buying one of these). The really interesting thing is that the manual states that the PPS output is within 50ns of reality. I plan on using one to discipline that Efratom rubidium standard I was asking about earlier in the week. By the way, the connector from Mouser electronics came in and I'm ready to go, just waiting on the part to come in from China. -Bob > > Thanks for your help! > > Best Regards, > > Mike Monett > > ___ > 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] Lassen IQ receiver
Hi Mike, The Lassen IQ is a little PCB mounted 12 channel receiver about half the size of a matchbox, which is intended for OEM applications. It's not easy to open to see what's inside. It uses tiny surface mount connectors to get signals in and out but there's no access to the oscillator if you want to use an external osc. It doesn't have a built in antenna so the performance depends on the external antenna connected to it. It seems to handle constellation changes quite well as far as I can see. The application info says it can be used for navigation as well as timekeeping. It has 2 serial ports as well as a 1 pps output. One serial port is used to control and read it using Trimble's TSIP binary protocol. There is free DOS and Windows software available from Trimble to do this. The other port can be configured to use TSIP, NMEA or Trimble's own ASCII protocol called TAIP. I paid AU$70 about 2 years ago, which at the time was equivalent to about US$60. You could probably do better these days. I bought a bunch of old 6 channel VP Oncore receivers about a year ago on ebay for AU12 each. They are ideal for timing aplications and clocks. HTH, Morris > > These units look interesting. Do you mind if I ask some questions? > > 1. What kind of non-time keeping uses have you found for them? > > 2. How well do they work indoors? Do you have to be near a window? > What about inside a multi-story building? > > 3. How well do they handle constellation changes? Is there an abrupt > shift in position? > > 4. Have you ever taken the shield off and looked inside? If so, can > you see the crystal oscillator and tell whether it is a bare crystal > or a complete oscillator module? > > 5. How much do they cost? Do you know of any others that are > cheaper? > > Thanks for your help! > > Best Regards, > > Mike Monett > > ___ 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] Lassen IQ receiver
Thanks again Bob, Yes, that's what I thought it would do, but It doesn't seem to be so. My micro is programmed to identify the beginning of an NMEA string by the $ character and there's only one per sec. Maybe the second string is concatenated onto the first one without the dollar symbol. Having said all that, in the time between my original post and this one I managed to get the TAIP output working and the micro to recognise it so I'm a happy man :-) Morris > Date: Sat, 11 Oct 2008 00:29:07 -0600 > From: "Robert Darlington" <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] Lassen IQ receiver >> > As far as alternating, you'll get the various NMEA strings in the order > you > choose (and the strings you choose) once a second. You won't get one, > then > the other, then back to the first. It'll be several all at once, and > that > block will repeat once a second. I suppose you could select just the two > you want, but they'd come in on the same data burst, repeating once a > second. > > first string > second string > <1 second pause> > first string > second string > <1 second pause> > etc. > > I don't know for sure if you can have port 1 setup with a particular set > of > NMEA data strings and port 2 setup with a different set. Assuming you > can't > do that (meaning they have to be the same NMEA data), you can probably > have > both ports spit out everything you'd need and ignore what you don't need > in > software. > > -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] Lassen IQ receiver
"Robert Darlington" <[EMAIL PROTECTED]> wrote: > I use them for non-time keeping things. You need to use the > configuration tool to configure the ports so that they both spit > out NMEA, and the particular NMEA strings you want to see, and > then save the configuration. > Otherwise you get NMEA out of one port and the Trimble binary > format out of the other. Do you have a copy of the software? You > can find it here: >http://www.trimble.com/embeddedsystems/lasseniq.aspx?dtID=support > Also, make sure you have the IQ and not the SQ. The SQ only has > one port but is otherwise pin compatible. Robert, These units look interesting. Do you mind if I ask some questions? 1. What kind of non-time keeping uses have you found for them? 2. How well do they work indoors? Do you have to be near a window? What about inside a multi-story building? 3. How well do they handle constellation changes? Is there an abrupt shift in position? 4. Have you ever taken the shield off and looked inside? If so, can you see the crystal oscillator and tell whether it is a bare crystal or a complete oscillator module? 5. How much do they cost? Do you know of any others that are cheaper? Thanks for your help! Best Regards, Mike Monett ___ 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] Lassen IQ receiver
As far as alternating, you'll get the various NMEA strings in the order you choose (and the strings you choose) once a second. You won't get one, then the other, then back to the first. It'll be several all at once, and that block will repeat once a second. I suppose you could select just the two you want, but they'd come in on the same data burst, repeating once a second. first string second string <1 second pause> first string second string <1 second pause> etc. I don't know for sure if you can have port 1 setup with a particular set of NMEA data strings and port 2 setup with a different set. Assuming you can't do that (meaning they have to be the same NMEA data), you can probably have both ports spit out everything you'd need and ignore what you don't need in software. -Bob On Sat, Oct 11, 2008 at 12:12 AM, Morris Odell <[EMAIL PROTECTED]>wrote: > Thanks for the reply Bob! > > Does this mean it's not possible to get two alternating NMEA messages from > the same port? I have all the Trimble (IQ_chat and IQ_monitor) utilities > and > use port 1 to communicate with a PC using TSIP. I have port 2 connected to > a > microcontroller and I want to get both strings alternating with each other > so I can translate them into a different serial code for a particular > application. Alternatively the TAIP message TM has all the info I need in > one sentence, but I can't seem to make it appear :-( > > It's definitely an IQ not a SQ. > > Thanks, > > Morris > > > > From: "Robert Darlington" <[EMAIL PROTECTED]> > > > I use them for non-time keeping things. You need to use the > configuration > > tool to configure the ports so that they both spit out NMEA, and the > > particular NMEA strings you want to see, and then save the configuration. > > Otherwise you get NMEA out of one port and the Trimble binary format out > > of > > the other. Do you have a copy of the software? You can find it here: > > > > http://www.trimble.com/embeddedsystems/lasseniq.aspx?dtID=support > > > > Also, make sure you have the IQ and not the SQ. The SQ only has one port > > but is otherwise pin compatible. > > > > On Fri, Oct 10, 2008 at 8:36 PM, Morris Odell > > <[EMAIL PROTECTED]>wrote: > > > >> Hi all, > >> > >> I'm using a Trimble Lassen IQ receiver for a Shera style GPSDO. That > part > >> works OK but I would also like to get serial data from the receiver's > >> output > >> port #2. > >> > >> The receiver seems to respond to commands sent to port #1 but the > desired > >> outputs don't seem to appear. > >> > >> Specifically I want to get two NMEA messages, GGA and ZDA, or > >> alternatively > >> the TAIP TM timing message. No matter how I instruct the receiver I > don't > >> see two NMEA messages, just the first one on the list I've sent to the > >> receiver. The TAIP doen't seem to work at all. > >> > >> Am I missing something here? Has anyone had any success with this > device? > >> > >> Thanks, > >> > >> Morris > >> > >> > > > > Looking more closely at the software list, I don't see the utility that I > > use. Whatever it is, it's a DOS based thing or is at least a shell ap > > with > > just text. I'll dig up the zip file at work when I'm in the office over > > the > > weekend and get it over to you if I still have it. I've used it > > successfully to configure both ports to dump NMEA with varying output > > strings. > > > > -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. > ___ 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] Lassen IQ receiver
Thanks for the reply Bob! Does this mean it's not possible to get two alternating NMEA messages from the same port? I have all the Trimble (IQ_chat and IQ_monitor) utilities and use port 1 to communicate with a PC using TSIP. I have port 2 connected to a microcontroller and I want to get both strings alternating with each other so I can translate them into a different serial code for a particular application. Alternatively the TAIP message TM has all the info I need in one sentence, but I can't seem to make it appear :-( It's definitely an IQ not a SQ. Thanks, Morris > From: "Robert Darlington" <[EMAIL PROTECTED]> > I use them for non-time keeping things. You need to use the configuration > tool to configure the ports so that they both spit out NMEA, and the > particular NMEA strings you want to see, and then save the configuration. > Otherwise you get NMEA out of one port and the Trimble binary format out > of > the other. Do you have a copy of the software? You can find it here: > > http://www.trimble.com/embeddedsystems/lasseniq.aspx?dtID=support > > Also, make sure you have the IQ and not the SQ. The SQ only has one port > but is otherwise pin compatible. > > On Fri, Oct 10, 2008 at 8:36 PM, Morris Odell > <[EMAIL PROTECTED]>wrote: > >> Hi all, >> >> I'm using a Trimble Lassen IQ receiver for a Shera style GPSDO. That part >> works OK but I would also like to get serial data from the receiver's >> output >> port #2. >> >> The receiver seems to respond to commands sent to port #1 but the desired >> outputs don't seem to appear. >> >> Specifically I want to get two NMEA messages, GGA and ZDA, or >> alternatively >> the TAIP TM timing message. No matter how I instruct the receiver I don't >> see two NMEA messages, just the first one on the list I've sent to the >> receiver. The TAIP doen't seem to work at all. >> >> Am I missing something here? Has anyone had any success with this device? >> >> Thanks, >> >> Morris >> >> > > Looking more closely at the software list, I don't see the utility that I > use. Whatever it is, it's a DOS based thing or is at least a shell ap > with > just text. I'll dig up the zip file at work when I'm in the office over > the > weekend and get it over to you if I still have it. I've used it > successfully to configure both ports to dump NMEA with varying output > strings. > > -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] Lassen IQ receiver
Looking more closely at the software list, I don't see the utility that I use. Whatever it is, it's a DOS based thing or is at least a shell ap with just text. I'll dig up the zip file at work when I'm in the office over the weekend and get it over to you if I still have it. I've used it successfully to configure both ports to dump NMEA with varying output strings. -Bob On Fri, Oct 10, 2008 at 8:36 PM, Morris Odell <[EMAIL PROTECTED]>wrote: > Hi all, > > I'm using a Trimble Lassen IQ receiver for a Shera style GPSDO. That part > works OK but I would also like to get serial data from the receiver's > output > port #2. > > The receiver seems to respond to commands sent to port #1 but the desired > outputs don't seem to appear. > > Specifically I want to get two NMEA messages, GGA and ZDA, or alternatively > the TAIP TM timing message. No matter how I instruct the receiver I don't > see two NMEA messages, just the first one on the list I've sent to the > receiver. The TAIP doen't seem to work at all. > > Am I missing something here? Has anyone had any success with this device? > > Thanks, > > Morris > > > ___ > 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] Lassen IQ receiver
I use them for non-time keeping things. You need to use the configuration tool to configure the ports so that they both spit out NMEA, and the particular NMEA strings you want to see, and then save the configuration. Otherwise you get NMEA out of one port and the Trimble binary format out of the other. Do you have a copy of the software? You can find it here: http://www.trimble.com/embeddedsystems/lasseniq.aspx?dtID=support Also, make sure you have the IQ and not the SQ. The SQ only has one port but is otherwise pin compatible. On Fri, Oct 10, 2008 at 8:36 PM, Morris Odell <[EMAIL PROTECTED]>wrote: > Hi all, > > I'm using a Trimble Lassen IQ receiver for a Shera style GPSDO. That part > works OK but I would also like to get serial data from the receiver's > output > port #2. > > The receiver seems to respond to commands sent to port #1 but the desired > outputs don't seem to appear. > > Specifically I want to get two NMEA messages, GGA and ZDA, or alternatively > the TAIP TM timing message. No matter how I instruct the receiver I don't > see two NMEA messages, just the first one on the list I've sent to the > receiver. The TAIP doen't seem to work at all. > > Am I missing something here? Has anyone had any success with this device? > > Thanks, > > Morris > > > ___ > 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] Lassen IQ receiver
Hi all, I'm using a Trimble Lassen IQ receiver for a Shera style GPSDO. That part works OK but I would also like to get serial data from the receiver's output port #2. The receiver seems to respond to commands sent to port #1 but the desired outputs don't seem to appear. Specifically I want to get two NMEA messages, GGA and ZDA, or alternatively the TAIP TM timing message. No matter how I instruct the receiver I don't see two NMEA messages, just the first one on the list I've sent to the receiver. The TAIP doen't seem to work at all. Am I missing something here? Has anyone had any success with this device? Thanks, Morris ___ 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.
