[hpsdr] Mercury sensitivity problem

[Phil Harman]

Hi Jose,

Check the input relay that switches the 20 dB attenuator in/off circuit for 
a possible dry joint.  Do you hear a 'click' when you select the attenuator 
in PowerSDR?

73 Phil...VK6APH



-----Original Message----- 
From: Jose V. Gavila
Sent: Saturday, September 08, 2012 4:52 PM
To: hpsdr at lists.openhpsdr.org
Subject: [hpsdr] Mercury sensitivity problem

***** High Performance Software Defined Radio Discussion List *****

Hi all,

I have just got a barely used set of Mercury-EU + Metis + Atlas and have
got it working fine with last svn release of PowerSDR 2.2.3. I had
previously checked with a previous 2.2.3 version, but the problem is the
same: it starts OK, receiving with a good sensitivity. Then, from time
to time, sensitivity drops a lot (about 4 or so S-meter units), so you
can only receive strong signals. Then, sometimes, it gets back to normal
and sometimes is stays that way.

I have 20+ years of experience in radio and 10+ fixing all kind of rigs
(in fact, now I work full time on that), and my gut feeling is that
there is an analog problem in the unit, due to a bad soldering joint or,
what I am afraid, a aproblem on the A/D

Is there a way to check (by software) my Mercury to be sure where is the
fault located?. At the end, I can resort to schematics and treat this as
any other rig but, if there are software tools, I would prefer that
approach as a first attempt to pinpoint the fault.

Thanks for your help and best regards,

JOSE

-- 
73 EB5AGV - JOSE V. GAVILA - IM99sm La Canyada - Valencia(SPAIN)
    http://agvradio.com  AGVradio
    http://jvgavila.com  Personal WEB
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