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AE9RB • View topic - HDSDR & Tx questions

HDSDR & Tx questions

General discussion and support for the Peaberry SDR V2.

HDSDR & Tx questions

Postby pilotcfii » Mon Mar 09, 2015 1:59 pm

I have had several JT65 QSO's using the PB and have received good signal reports (@ 200mW indicated output) but of course I am not yet satisfied that the signal is clean enough. When I run through the Tx alignment as shown on page 25 of the assembly instructions, I can't the the adjustment making any difference in the signal. During a QSO though I see several signals adjacent to my main signal on my monitoring receiver. The monitoring receiver is a Yaesu FT-950 that is disconnected from an antenna but is connected to the same Alpha-Delta antenna switch the PB is connected to. That leads me to believe I have some cleanup work to to. Any help here would be appreciated.

Second problem is with HDSDR. When I first start up the PB/HDSDR/HRD/WSJTX chain, I find it's necessary to stop at the HDSDR point and exercise the Tx button. If I don't I will later have problems the Tx from HRD. First there will be a 1 or 2 second delay in Tx start and then at the end of the Tx period, Tx may not stop. In order to stop Tx, sometimes clicking the HDSDR Tx button will work but usually I need to just power off the PB, and then restart all the software. HDSDR is set to use the HRD (DDE) button.
73
Dan Malcolm
K4SHQ CFI/II
pilotcfii
 
Posts: 130
Joined: Sat Dec 07, 2013 6:52 pm
Location: Alabama

Re: HDSDR & Tx questions

Postby AE9RB » Tue Mar 10, 2015 4:24 pm

Half-power and the inability to null the TX image means one of the two I/Q signals of the transmitter is not connected or both channels are shorted together. Either way you are looking for soldering errors.

However, you said Peaberry CW puts out 2W. That is definitely not half-power. So maybe you have a software problem.

Not sure why HRD has trouble keying HDSDR. I don't use HRD. This also smells like software.
73 David AE9RB
AE9RB
Site Admin
 
Posts: 511
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Re: HDSDR & Tx questions

Postby pilotcfii » Tue Mar 10, 2015 8:58 pm

73
Dan Malcolm
K4SHQ CFI/II
pilotcfii
 
Posts: 130
Joined: Sat Dec 07, 2013 6:52 pm
Location: Alabama

Re: HDSDR & Tx questions

Postby pilotcfii » Thu Mar 12, 2015 2:59 pm

73
Dan Malcolm
K4SHQ CFI/II
pilotcfii
 
Posts: 130
Joined: Sat Dec 07, 2013 6:52 pm
Location: Alabama


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