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v2.02k - Twice the fun, WSPR and QRSS together!
Hans Summers
Good morning all, This is all the fault of Keith Maton G6NHU, who asked for a special version. Then we thought others might like it too. So that became v2.02k.?
It is based on v2.02 but the difference is, it ALWAYS sends a WSPR transmission in the first 2 minutes, followed by the selected QRSS mode. The intended use, is to send WSPR for 2 minutes, followed by 8 minutes of FSK/CW (or other mode). You have to use Frames in this version. They don't have to be 10 minutes, but need to be long enough to fit WSPR and your message, and if you are using GPS, you need 13 seconds free at the end of each frame to do the calibration.
This means you can play with WSPR, and QRSS modes, at the same time. You can select a different frequency for the WSPR transmission and the FSK/CW (or other QRSS mode) transmission.
The summary of the "version k" is here??and you can also download its own operating manual, specific to this version, which details all the differences.
If you want, you can buy this version of the chip here?
73 Hans G0UPL |
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v2.02 released
Hans Summers
All Thanks for waiting patiently. The new v2.02a version is now officially released. Many thanks to Andy G0FTD, Eddie G3ZJO and Keith G6NHU who beta-tested the new version. The final version is v2.02a which is only slightly different from the v2.02 discussed before.?
The list of fixes and features is here:??
Most notable features are: - Full accurate operation up to 10m and higher - GPS interface is similar now to the U1 - Support for WSPR-15, and support for a wideband fast FSK mode
- No set-to-zero when changing FSK, makes the DDS output purity much cleaner v2.02 is known to work with the Adafruit GPS module and the Rayax 501 module. Eddie still has trouble with it working with his Trimble and I have made a note of this on the web page. I will work with Eddie to resolve those problems and perhaps incorporate into the next version. In the mean time, I did not want to delay everyone else who is waiting for v2.02 features so decided to go ahead anyway.?
You can order the new version in the shop??or as I mentioned before, if you feel you should be entitled to a free upgrade then please email me.?
73 Hans G0UPL . |
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Re: Argo - Display Actual Radio Frequency
"Alan"
I don't think you should assume your receiver calibration is absolutely correct or that the sound card frequency display is spot on.
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This is what I do to set up a QRSS transmitter. I set Argo to display audio frequencies i.e. no offset. Tune the receiver, in CW mode, to 9.996 MHz to pick up the Russian standard frequency station RWM. If everything was perfect, I would expect to get a 600 Hz tone displayed in Argo when the receiver displays 9.996000 MHz. In fact I get 618 Hz, presumably the receiver oscillator is slightly off. Then I retune to 10.140050 MHz - the centre of the QRSS band - and tweak the trimmer cap to get the space frequency as near to 618Hz as possible. Matching the transmitter to RWM in this way eliminates calibration errors, assuming the receiver offset is the same at both frequencies which I think is reasonable. Hope this helps. Regards, Alan G0RWB --- In QRPLabs@..., Chris Mac <chrismac@...> wrote:
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Re: Argo - Display Actual Radio Frequency
Chris Mac
¿ªÔÆÌåÓýArgo v1 build 143 :? I set the two left-hand boxes to 1000 and the right-hand to 10138700. This allows QRSS and WSPR to run simultaneously.? Obviously you need a filter bandwidth of at least 1.3 kHz but WSPR prefers 2.5 kHz I think.? The RX dial frequency should be 10138.7 kHz USB.? You then drag the Argo scale UP to show 1014100 down to about 10139930 and can expand the span of the window using the shift and the + or - key.? If you don't want WSPR then it's 1000 1000 10139000.? Chris.? Sent from Chris Mac's battery-powered transistor radio telephone.?Amateur radio: G?MQW? On 14 Jun 2013, at 16:48, "Philip" <pcteee@...> wrote:
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Re: Argo - Display Actual Radio Frequency
"Philip"
I set my receiver to 10.139000 USB
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Also set Argo to 10139000 Setup/calibration This takes care of the offset and you get a proper read out in the LHS Hope that helps Philip G4JVF --- In QRPLabs@..., "Mark" <mark.g0mgx@...> wrote:
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Argo - Display Actual Radio Frequency
"Mark"
Hi Gang
Just built my 3rd QRSS beacon - this time it's the Hans Arduino shield. Mighty fine piece of kit too! I've managed to completely confuse myself with the setup of Argo and hence the frequency adjustment. Whilst I am sure this is a question every idiot like me asks, but I cant find the answer by searching the group. I have my Yaesu radio tuned to 10.140.00 and in USB mode. How do I configure Argo so the RHS shows me the actual frequency rather than the reading in Hz that I see right now. I think I need to worry about carrier offsets and other such complications, but not too sure. The example in the instructions shows the Argo screen with 1230 - 1320 Hz shown and I'm struggling with my little brain to understand how that relates to 10.140.00 through 10.140.10. If someone can point me at a suitable idiots guide to setting this beacon up I would be very grateful. If all goes to plan this week I will be putting this on the air as A71/G0MGX next week from Doha. Many thanks, Mark. G0MGX |
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Re: GPS behaviour very inconsistent
Barry Chambers
¿ªÔÆÌåÓýOn 12/06/2013 13:15, Andy Cutland
wrote:
?Andy I would certainly place the GPS outside. An initial fix will take a few minutes or more, depending on where satellites are in your visible piece of sky. A good way to check whether a fix has been found is to set up a spurious locator using the U2 menu and then see later whether it has been corrected. -- 73 Barry, G8AGN |
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Re: GPS behaviour very inconsistent
Andy Cutland
Hi Barry, Well I fired it up this morning but couldn't get anything out of it. Not sure if it was able to get a fix from where the unit is located so I will take the whole thing outside to give it a chance to see some satellites. I checked the feed voltage and that was a stable 3.3v. The earth checked out fine too so I hope all will be good once a fix is made. Here's hoping ! 73's De Andy From: Andy Cutland To: qrplabs@... Sent: Tuesday, June 11, 2013 3:31 PM Subject: Re: [QRPLabs] GPS behaviour very inconsistent
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That's great Barry, thanks for the info. I hope to fix it up later tonight. 73"s de Andy ------------------------------ On Tue, Jun 11, 2013 6:25 AM PDT Barry Chambers wrote: >On 10/06/2013 18:27, Andy Cutland wrote: >> Hi Barry, >> >> My up501 has just arrived from taiwan and am eager not to blow this >> one up ! >> >> Did you place any resistors on the unit and if so what value did you >> use. I will be supplying the unit from a dedicated 3.3v reg supply. Am >> I right in thinking that pin 4 and 5 can be connected together (vdd >> and vdd b) ? >> >> 73's >> De Andy >> >> >> ---------------------------------------------------------- >> *From:* Barry Chambers <b.chambers@...> >> *To:* QRPLabs@... >> *Sent:* Friday, May 31, 2013 12:18 PM >> *Subject:* Re: [QRPLabs] GPS behaviour very inconsistent >> >> Afternoon All >> >> For several weeks, I've been struggling to get my U2 kit working with a >> EM-406A GPS module. The problem seems to be with the 1pps signal. as the >> NEMA data is read correctly. >> >> Today, I got through the post a Fastrax (Reyax) UP501 GPS module (from >> Taiwan via E-Bay, ?17, about 10 days delivery time). Hans lists this >> module on the U2 kit web pages. It requires a 3.3v supply and the modem >> setting is 09600,10,1,8. Hey presto! It works! I found that the "Inv >> GPS" setting needs to be "On". The clock keeps perfect time (as compared >> against my wireless clock), the Locator is set correctly and the DDS >> 125MHz oscillator frequency is corrected (mine is now slightly lower >> than 125 MHz). At present I have "Start" set at 02 and "Frame" at 04 and >> the U2 is on soak test on 20m WSPR with a "loop" made from two pieces of >> wire about 15cm long, joined by a 47R resistor. >> >> 73 >> >> Barry, G8AGN >> >> >> ------------------------------------ >> >> Yahoo! Groups Links >> >> >> QRPLabs-fullfeatured@...> >> >> >> >> >> > >Andy > >I didn't use any pull-up resistors. I connected GPS pins 4 and 5 >together and fed them from a 3.3v regulator ( TS2950CT-3.3, N68CA from >Maplin). > >GPS pin 1 was left floating. > >In the U2 menu, "Inv GPS" should be set "On". > >Once a 3D fix has been obtained, the clock should run correctly >(including the seconds). When using the WSPR mode, the Maidenhead >location should be correct for your location and the DDS frequency >should be slightly different from the default of 125,000,000. > >Hope this helps. > >-- > >73 > >Barry, G8AGN > |
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Re: WSPR TX Time Charts
g3zjo
On 11/06/2013 15:35, andyfoad@... wrote:
The moral of the story is ALWAYS recalibrate the systemn clockHmm I was hoping for better than that, I have several Home Brew WSPR PIC MEPT's, PIC Xtal Clock sets the timing, WSPR time is accurate for months, I switch them on and off at will and they are always stable. I fetched an un used one out of the drawer after 2 years and it was still spot on. Mind you with a GPS connected its irrelevant. 73 Eddie G3ZJO (stable sort of fellow) |
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Re: WSPR TX Time Charts
"andyfoad@..."
I am watching this one with interest too.
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I have a U2 which I initially used with no GPS. I calibrated the clock frequency correctly and left the U2 on WSPR witn NO problems. After a day the U2 was transmitting correctly in each assigned time slot. BUT - if yiou switch the U2 off and then restart it (perhaps after an LPF change) then you MUST recalibrate the system clock again, because quartz xtals have a habit of not returning to their original operating frequency even after warming up. That would make the WSPR timings start to wander, e.g start at 10 seconds past the minute and getting progressively worse as time goes on (timings maybe lagging or leading). The moral of the story is ALWAYS recalibrate the systemn clock to the xtal frequency after switching off ;-) 73 de Andy --- In QRPLabs@..., "Paul KE7HR" <ke7hr@...> wrote:
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Re: GPS behaviour very inconsistent
Andy Cutland
That's great Barry, thanks for the info.
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I hope to fix it up later tonight. 73"s de Andy ------------------------------ On Tue, Jun 11, 2013 6:25 AM PDT Barry Chambers wrote:
On 10/06/2013 18:27, Andy Cutland wrote:Hi Barry,Andy |
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Re: WSPR TX Time Charts
"Paul KE7HR"
Hans,
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I may be in error and was only thinking of when I was testing with frame of 02, so it would start as soon as possible. I do find it interesting that for the frame settings that do not come out equal into the 60 minutes, that there is a "short" interval before it resets to the start time value. That was one of the things that caused me to build the chart. Paul KE7HR --- In QRPLabs@..., Hans Summers <hans.summers@...> wrote:
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Re: GPS behaviour very inconsistent
Barry Chambers
¿ªÔÆÌåÓýOn 10/06/2013 18:27, Andy Cutland
wrote:
? Andy I didn't use any pull-up resistors. I connected GPS pins 4 and 5 together and fed them from a 3.3v regulator ( TS2950CT-3.3, N68CA from Maplin). GPS pin 1 was left floating. In the U2 menu, "Inv GPS" should be set "On". Once a 3D fix has been obtained, the clock should run correctly (including the seconds). When using the WSPR mode,? the Maidenhead location should be correct for your location and the DDS frequency should be slightly different from the default of? 125,000,000. Hope this helps. -- 73 Barry, G8AGN |
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Re: WSPR TX Time Charts
Hans Summers
Hi Paul?
It's obviously not a particularly critical thing, but this one is interesting. Are you sure? I just checked in the code and I couldn't see how that would happen? I'll try to reproduce it here too!
73 Hans G0UPL |
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Re: GPS behaviour very inconsistent
Andy Cutland
Thanks for the info Andy.
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I think your reply is a yes to my question in that the two pins can be connected to the same voltage source. 73's De Andy ------------------------------ On Mon, Jun 10, 2013 10:50 AM PDT andyfoad@... wrote:
Am I right in thinking that pin 4 and 5 can be connected togetherWire the back up battery line I think it is to the 3.3vdc supply. |
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WSPR TX Time Charts
"Paul KE7HR"
I put a series of WSPR TX time charts in the Photos section. They show the time slot for various start times and frame settings. For the 00 start time, the chart will be valid after the first hour since the transmit starts in the first available slot and that it likely to be a random time. It was easier for me to see the transmit times on a chart...
Paul KE7HR |
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DDS Oscillator spreadsheet
"Paul KE7HR"
I put a spreadsheet to help calculate the true DDS oscillator frequency in the Files section. It allows a normal operating frequency to be used instead of an out of band frequency.
Make sure that you have an adequately warmed up oscillator and receiver since you are likely measuring the offset in single or tens of Hertz only. Then your on the air transmissions can be confirmed with receiving stations of good quality. In my case there are several WSPR stations on 80 meters that have rubidium or GPS disciplined receivers. When they all agree on my frequency, I have confidence in it. Paul KE7HR in Phoenix, AZ |
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Re: GPS behaviour very inconsistent
"andyfoad@..."
Am I right in thinking that pin 4 and 5 can be connected togetherWire the back up battery line I think it is to the 3.3vdc supply. Then just wire the data and 1pps direct to the U2. No pull up / down / sideways resistors - no nothing ;-) Just make the small adjustment on the U2 menu as per Hans' website and enjoy hassle free GPS working. 73 de Andy (UP501 user on U1/U2). |
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Re: GPS behaviour very inconsistent
Andy Cutland
Hi Barry, My up501 has just arrived from taiwan and am eager not to blow this one up ! Did you place any resistors on the unit and if so what value did you use. I will be supplying the unit from a dedicated 3.3v reg supply. Am I right in thinking that pin 4 and 5 can be connected together (vdd and vdd b) ? 73's De Andy From: Barry Chambers To: QRPLabs@... Sent: Friday, May 31, 2013 12:18 PM Subject: Re: [QRPLabs] GPS behaviour very inconsistent Afternoon All For several weeks, I've been struggling to get my U2 kit working with a EM-406A GPS module. The problem seems to be with the 1pps signal. as the NEMA data is read correctly. Today, I got through the post a Fastrax (Reyax)? UP501 GPS module (from Taiwan via E-Bay, ?17, about 10 days delivery time). Hans lists this module on the U2 kit web pages. It requires a 3.3v supply and the modem setting is 09600,10,1,8. Hey presto!? It works! I found that the "Inv GPS" setting needs to be "On". The clock keeps perfect time (as compared against my wireless clock), the Locator is set correctly and the DDS 125MHz oscillator frequency is corrected (mine is now slightly lower than 125 MHz). At present I have "Start" set at 02 and "Frame" at 04 and the U2 is on soak test on 20m WSPR with a "loop" made from two pieces of wire about 15cm long, joined by a 47R resistor. 73 Barry, G8AGN ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: ? ? <*> Your email settings: ? ? Individual Email | Traditional <*> To change settings online go to: ? ? ? ? (Yahoo! ID required) <*> To change settings via email: ? ? QRPLabs-digest@... ? ? QRPLabs-fullfeatured@... <*> To unsubscribe from this group, send an email to: ? ? QRPLabs-unsubscribe@... <*> Your use of Yahoo! Groups is subject to: ? ? |
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