[hpsdr] Using Mercury to monitor final amplifier transmit signal

[Joe Martin K5SO]

…of course, if distortion/cleanliness of the Tx signal is what you’re wanting to see, not simply avoiding damage to the Rx board,  you should make sure the level into the Rx is low enough to ensure that the ADC does not over range.  20 dB over S-9 on the receiver meter is about -50 dBm, which is a good level to use I think, with plenty of dynamic range for most things. 

73,  Joe K5SO

On Feb 10, 2013, at 9:06 AM, Joe Martin K5SO wrote:

> ***** High Performance Software Defined Radio Discussion List *****
> 
> The ADC overload status bit comes on at around -10 dBm;  that’s certainly a safe level.  I try not to use more than that here.  I’ve not experienced any problems with even 0 dBm but as I said I tend to use less than that.  Yes, levels are similar for Hermes, Angelia, and Mercury. 
> 
> 73, Joe K5SO
> 
> 
> On Feb 10, 2013, at 8:51 AM, Jean-Claude JCA. Abauzit wrote:
> 
>> ***** High Performance Software Defined Radio Discussion List *****
>> 
>> What is the safe level in dBm to use when monitoring the transmit signal? Here I have Hermes and I suppose the max level on RX is the same as for Mercury.
>>  
>> Thanks,
>> Jean-Claude PJ2BVU
>>  
>> _______________________________________________
>> HPSDR Discussion List
>> To post msg: hpsdr at openhpsdr.org
>> Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
>> HPSDR web page: http://openhpsdr.org
>> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
> 
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20130210/55024067/attachment-0004.htm>