I've used the XG3 as signal source for testing/aligning VHF to mw
gear and do not worry about its accuracy/stability. Instead I use my
EIP538 counter which is good to 26.5 GHz using either the internal
TCXO or my Rb source into the counter reference port. At turn-on the
XG3 drifts quite a
Hi Maverick,
The accuracy of the DG1022A stinks with the internal oscillator. Counter
likewise is inaccurate. Look at the specs -- something like 50 ppm.
I had one and measured how bad it really was. In all other respects, it
was a decent product. Apparently waveform synthesis is cheap and
I have a Rigol DG1022A Arbitrary Waveform Function Generator that has a
counter that can measure 1 Hz to 200 MHz at 200 mVpp to 5 Vpp. My GPSDO is
within this range for 10 MHz output (5 Vpp knocked down 3 dB). Seems the XG3
and XG3 should work fine, eh?
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Please realize that while the XG3 can be calibrated, it does not employ a
temperature compensated or ovenized crystal oscillator as is found in higher
end test equipment. The unit can be susceptible to temperature swings,
holding it in your hand for several minutes, for example, will affect the
Bret, Don brings up a great point if you don't have a frequency counter.
Per Don's suggestion you could even get very close if you zero beat your K3
to a WWV carrier on 10, 15 or 20 mhz. This is really easy to do with the K3
reference offset setting in the Config menu...
Tune into the WWV 10mhz
If you do not have a frequency counter, there is another way.
Use XG3 Utility to set the XG3 to provide a 10 MHz output.
Listen to the 10 MHz reference in your receiver in CW mode and peak the
signal at your sidetone pitch. Then listen to the XG3 without touching
the receiver. Adjust the XG3
Hi, normally, you would drive a frequency counter with your 10mhz GPSDO
output... i.e. you need to have a frequency counter that accepts a 10mhz
input as a reference. Then you would measure the output of the XG3 for any
given frequency and adjust the parameters in the software that programs the
I'm not quite sure how to calibrate my XG3 against the 10MHz output of a
GPSDO. Appreciate help on correct tab, button, etc, or XG3 Utility and how
best to connect the GPSDO to XG3, or through my K3S which is connected to
the GPSDO.
Thanks, Bret/N4SRN
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