XG2 Sig. Generator

[Randy Moore]

I have a trusty Elecraft XG2 S9 Signal Generator that I've used for
years. It produces a nice S9 signal into my K3 at 7040.3 KHz.  I'm
trying to use it for trouble shooting a problem on a transceiver kit and
there's something that I don't understand.  When I try to measure the 50
uV (S9) signal with a Siglent SDS 1102 CML scope, I get nothing (no
signal). I've tried it with the XG2 antenna connector open, and with it
connected to a good 50 ohm dummy load.  I'm measuring at the XG2 antenna
connector (center conductor) with the scope probe grounded on the large
50 uV/1 uV switch which is grounded to the XG2 circuit board ground.

I'm able to measure other signals of about the same amplitude and
frequency.

Are my expectations wrong, or am I doing something wrong???

73,
Randy, KS4L
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[Don Wilhelm]

Randy,

That scope has a sensitivity of 2mV per division on the most sensitive
setting.  That is 2000uV per division.  The 50uV output of the XG2 would
show up as only 1/40th of a division on your 'scope - that may not be
enough to discern easily.
If you are using a 10X probe then the XG2 output would be only 1/400th
of a division - very difficult to see.

73,
Don W3FPR

On 5/9/2017 1:49 PM, Randy Moore wrote:
> I have a trusty Elecraft XG2 S9 Signal Generator that I've used for
> years. It produces a nice S9 signal into my K3 at 7040.3 KHz.  I'm
> trying to use it for trouble shooting a problem on a transceiver kit and
> there's something that I don't understand.  When I try to measure the 50
> uV (S9) signal with a Siglent SDS 1102 CML scope, I get nothing (no
> signal). I've tried it with the XG2 antenna connector open, and with it
> connected to a good 50 ohm dummy load.
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[Elecraft mailing list]

Just a quick thought, are you using a 10:1 probe? If so, you would only be getting 5 uV to the scope.

Harlan
K4HES

Sent from my iPhone

> On May 9, 2017, at 1:49 PM, Randy Moore <[hidden email]> wrote:
>
> I have a trusty Elecraft XG2 S9 Signal Generator that I've used for years. It produces a nice S9 signal into my K3 at 7040.3 KHz.  I'm trying to use it for trouble shooting a problem on a transceiver kit and there's something that I don't understand.  When I try to measure the 50 uV (S9) signal with a Siglent SDS 1102 CML scope, I get nothing (no signal). I've tried it with the XG2 antenna connector open, and with it connected to a good 50 ohm dummy load.  I'm measuring at the XG2 antenna connector (center conductor) with the scope probe grounded on the large 50 uV/1 uV switch which is grounded to the XG2 circuit board ground.
>
> I'm able to measure other signals of about the same amplitude and frequency.
>
> Are my expectations wrong, or am I doing something wrong???
>
> 73,
> Randy, KS4L
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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