[hpsdr] Help Needed: PowerSDR TX Frequency Inaccuracy
rfcgf600 at ybb.ne.jp
Fri Jan 11 16:31:16 PST 2013
Frequncy set to 3.560 000 in CW on the display, not 3.650 000.
From: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org]On Behalf Of Tokio Endo
Sent: Saturday, January 12, 2013 9:20 AM
To: hpsdr at lists.openhpsdr.org
Subject: [hpsdr] Help Needed: PowerSDR TX Frequency Inaccuracy
I measured TX frequncy of PowerSDR.
Frequency set to 3.650 000 in CW on the display.
However the measured frequency in transmission is 3.559 9715.
About 28 Hz down. Receiving is quite normal, e.g. in the reception of
strong AM broadcasting station by tuning in the excat frequncy display, LSB
or USB is the same sound. If there is a 28Hz difference we can easily
identify the frequency difference listening music in LSB or USB.
The above is the result of newlly installed PowerSDR V2.2 (11/24/12). The
board is Hermes V2.1. External 10MHz OCXO is used, its accuracy is confimred
after the above measurement.
The infomration about the above is very much appreciated. So far I've
transmitted in the wrong frequncy.
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