[hpsdr] Using Mercury to monitor final amplifier transmit signal

[Joe Martin K5SO]

Hi Tom, 

Sorry for the confusion.  To run DUPLEX mode with PowerSDR you need to run Doug W5WC’s RX1 version of PowerSDR v2.2 (11/24/12).  It has a “DUP” button on the front panel that the RX2 version does not have.  

When you transmit with the DUP button active your panadapter display shows the Rx spectrum during transmit as well as during receive.  By tuning your Mercury Rx freq to your Tx freq you may monitor the frequency on which you are transmitting.  This displayed signal is the signal that arrives at the BNC input connector on Mercury when running in DUP mode. 

Works here. 

Maybe this info helps? 

73,  Joe K5SO


On Feb 7, 2013, at 10:03 PM, Tom Cathey wrote:

> ***** High Performance Software Defined Radio Discussion List *****
> 
> 
> Joe and Phil,
> 
> I tried to disable the signal displayed by Mercury when Penny is transmitting.  It is always there, even when I remove the ant BNC plug off the back of Merc's board.  It appears to be coming in from somewhere else, like thru the board connector.
> 
> Is this the way it should be?  Or am I toggled on for the duplex mode without realizing it?  How is the duplex mode enabled?
> 
> Bottom line is, with or without an antenna or even a connector on the ant input to the Merc, when Penny is transmitting,  Penny's signal is strong and stable on the Merc pan display. This is with no external amplifier connected. I would like to see this low level signal disappear so that I can then inject some external sampled RF from the amplifier into Merc's ant input.
> 
> What am I missing?
> 
> Tom, k1JJ
> 


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