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Re: Constant carrier

"g7kse"
 

Thanks for the quick response Hans,

hope this helps better diagnose if there is a problem

The software version is 1.02
Kit bought in August
Receiver is connected to PC running Argo
Mode selected (nominally) CW
RF load on kit 20dBm
Rx RF Gain backed off

Powering up is a bit hit and miss - Occasionally it doesn't start up, sometimes it'll start up with what I assume is a corrupted set of characters on the LCD. Sometimes its fine. I can't find a fault with wiring here although any pointers would be helpful

In test mode I was expecting to see the frequency shift every second (Speed set to 01)with an output on Argo pretty much as per the build instructions section 7. What I actually get is what looks and sounds like a carrier without any frequency shift. Or nothing at all.

In CW mode I get a similar situation where I get a constant carrier heard through the receiver speaker and shown on Argo. The output looks like the carrier is on and keying produces the correct code but he carrier never drops off. I'll put a capture from Argo into the photos folder.

Hope this is enough. I will keep on experimenting here and hopefully will get it sorted out.

Alex, g7kse

--- In QRPLabs@..., Hans Summers <hans.summers@...> wrote:

Hi Alex,

I'm sorry but it's not quite clear to me what you're seeing here, and what
you're expecting to see.

Please can you confirm your version is v1.02? Versions before that had an
on/off keying problem but that was fixed in v1.02. FYI the full version
history is here: .

You mention the "Test" mode - in this mode the signal should be constant
carrier, with a frequency shift every N seconds where N is the speed
setting you have entered.

How are you monitoring the signal and what load are you using at the RF
output of the kit? Are you using Argo to monitor, or just listening on the
receiver audio?

I think more information is necessary, to help to either diagnose the
problem, or even if there IS an actual problem :-)

73 Hans G0UPL



--- In QRPLabs@..., "Alex" <g7kse@> wrote:

I've got a little problem that I think isn't a result of my mistake. I
get a constant carrier and can not see anything whilst in test mode. I
don't have sophisticated test gear just a reiver and dmm.

the kit powers up and if I use the cw mode for example there is a
constant carrier on just about the right frequency and the cw dit and dahs
will go on nicely but the carrier doesn't drop off. Its making the PA quite
hot and I'm sure (well fairly) it not something I've done. the software
version is 1.2

Any clues?

Alex, g7kse
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