I don't think you should assume your receiver calibration is absolutely correct or that the sound card frequency display is spot on.
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
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--- In QRPLabs@..., Chris Mac <chrismac@...> wrote:
Argo 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:
I set my receiver to 10.139000 USB
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:
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
