[hpsdr] Gain problem. Hardware??

[Helmut]

Mike, on the Mercury board the 20 dB att. is switched on/off by a small
smd-relay. Please check this device for proper operation.

73, Helmut, DC6NY

-----Ursprüngliche Nachricht-----
Von: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Mike F
Gesendet: Samstag, 26. November 2016 04:12
An: hpsdr at lists.openhpsdr.org
Betreff: [hpsdr] Gain problem. Hardware??

***** High Performance Software Defined Radio Discussion List *****

My system is a HPSDR 3 cca configuration. Running PSDR 3.3.6.

In the last couple of weeks, occasionally I have experienced a problem. 
At the end of a transmission the receive signal is about 20db down, 
although on psdr the ATT shows the gain switched back to 0db. If I 
switch ATT to -20 then the display looks like the signal level is 
correct. Switching back to 0 sometimes fixes the problem and sometimes 
doesn't. I can see that this problem could be caused by the hardware 
input attenuator not reliability switching.

Any thoughts would be appreciated.

Thanks

Mike, K7SR


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