Slava,
Most external reference sources have an output of +10 dBm or somewhere
around that level.
It is not a matter of simply calibrating, the external reference is
intended to be connected continuously.
Yes, there is a data table created that can be used when the reference
is not present.
I really can't answer about the level of the XG3, but I am certain the
frequency accuracy it is not as tight as a real external reference -
rubidium standard or GPS disiplined oscillator. The spec for the XG3 is
+/- 50 ppm while an external reference is typically stated in parts per
billion.
73,
Don W3FPR
On 4/29/2014 11:18 PM, Slava Baytalskiy wrote:
Hello again, everyone!
I just installed the K3EXREF board in my K3 and i also have the KTCXO3 unit in
there from before.
The idea was to use the XG3 as the external 10 MHz reference for calibration.
I wasn't thrilled with the accuracy of the zero-beat method that i was using
(or rather i wasn't thrilled with MY accuracy).
I think i did the procedure correctly: went to REF CAL menu, enabled the
K3EXREF, hooked up the BNC cable, the asterisk started flashing, the frequency
changed (clearly the zero-beat i did before wasn't correct).
My only question is about the output level of the XG3: i used the zero dBm. But
the calibration procedure mentioned that the reference signal should be between
+4 dBm and something else (higher).
XG3 doesn't seem to go that high though. Is that ok? Using zero dBm for this?
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
