Nick,
Yes, you set CAL S Lo with the antenna removed.
The order of adjustment is: 1) AGC Threshold, 2) CAL S-LO, 3) CAL S HI. You
may have to cycle through 2 and 3 a couple times, there is a small amount of
interaction.
When setting CAL S HI, first set it for full scale deflection, and then
check the S-9 level with the XG1 - if the meter reads a bit below S-9, you
can increase it with CAL S HI, but if it is higher than S-9, go back and
change the AGC Threshold by a small amount (I suggest 0.2 volts at a time)
and re-do CAL S LO and CAL S HI again. Repeat the process until you have
the S-meter deflection that you want. If you use CAL S HI alone to REDUCE
the reading with a 50 uV input the result will be a lack of full S-meter
deflection.
I know that is a bit more involved than the instructions in the manual, but
such are the problems involved in 'fine-tuning' several parameters - they
interact.
Once you have adjusted everything with no antenna and the XG1, if you see
S-9 when you connect the antenna, then you may conclude that you have an S-9
noise level!
73,
Don W3FPR
> -----Original Message-----
>
> S-meter alignment... Page 47, I've been through it but it doesn't seem
> to give me a useful range, I feel it should be peaking when I tune a
> strong signal and dropping off when there's just background noise. I
> have XG1, can tune it, can adjust "CAL S HI" to S9, but then just about
> everything seems to be S9. I can't help wondering if I've done something
> wrong. Am I supposed to be doing "CAL S LO" with antenna removed or
> anything? Is there another "CAL S" process I can follow, or is my QTH
> really surrounded by S9 noise on all bands or something?
>
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