[hpsdr] Using Mercury to monitor final amplifier transmit signal

[Phil Harman]

Hi Tom,

You could use one of the open collector outputs in Penny to operate an RF
relay that, when on Transmit, connected the antenna on Mercury to an RF
sampler at the output of the amplifier.

73 Phil...VK6APH




> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Tom,
>
> Predistortion possibilities aside, it seems to me that operating in duplex
> mode with the Rx1 freq set to the Tx freq might work for you with a single
> Mercury.  Take care that the input rf level to Mercury is within safe
> limits, of course.
>
> 73,  Joe K5SO
>
> On Feb 6, 2013, at 8:01 PM, Tom Cathey wrote:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Mercury is presently set up to monitor the low level Penny output
>> spectrum when transmitting.
>>
>> Is there a software or hardware modification to input some sampled FINAL
>> amplifier RF (1 KW or whatever) into Mercury to monitor the high level
>> amplifier spectrum?   (IE, disconnect the Penny sampling and connect in
>> the final amplifier sampling instead)
>>
>> Or is a second Mercury required that is dedicated to monitoring through
>> it’s normal antenna input?
>>
>> Thanks.
>>
>> Tom, K1JJ
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