[hpsdr] A Question for Team Hermes

[Phil Harman]

Hi Bhanu,

Thanks for your question.  The current Hermes test code does not support ALC 
from an external amplifier.

There is provision to input external analogue signals (0-3v)  into Hermes 
via the I/O header. However:

1. Traditionally ALC is a negative going signal so this would need to be 
inverted before connecting to Hermes

2. In my opinion ALC is a very poor way of controlling the output power of 
an amplifier since there is inherently a delay between the RF signal being 
generated and the ALC voltage.  With correctly implemented processing of the 
Tx signal in the PC, and using the gain-per-band controls, then ALC should 
not be needed.

Adding ALC capabilities to the Hermes code is not currently on the 
development schedule.

Good to hear that you enjoyed the Ethernet version of Hermes, you are 
fortunate since I have yet to see one!

73 Phil....VK6APH


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