[hpsdr] Mercury Calibration with PWRSDR

[Graham / KE9H]

Tim:

I don't think the frequency calibration function does anything on HPSDR.
I think it is a legacy control from SDR.

As far as I know, to get it spot-on, you need to feed it an accurate 10 MHz
signal to the Atlas bus.  It should then lock to this signal with whatever
level of accuracy you are feeding it. 

A nice HP10811 should keep everything locked to about one part in 10^8,
or about 0.1 Hertz at 10 MHz.

I have not tried this yet, but it is on my list of things to do soon.

--- Graham

==

Tim O'Rourke wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> I am using the first issue of PWRSDR that was released for Mercury.
> May be a moot point in the later releases, but I have not been able to get the frequency calibration spot on, the level calibration workks FB but even zoomed all the way in and 25Hz filter selected I an still off by around 200Hz on 40 meters, little bit worse on 20 meters.
> Not a problem just an observation.
> 73 Keep up the FB work, Mercury rocks! Tim W4YN
>
> Tim O'Rourke 
> W4YN at ARRL.Net
> Low Power Amateur Radio Rocks 
> Member of Flying Pigs,ARCI,GQRP,RSGB,ARRL Life Member
> NHRA Life Member
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