On 8 Sep 96 08:38am, Bill Cheek wrote to Bill Funk:
 BF>> Neat, for sure. I just do it another way. Although, to be honest,
 BF>> I've never found a birdie on the R-7100. It's neat to hook it up to
 BF>> Grove's spectrum analyzer, and watch internal signals march up and
 BF>> down when searching. But the radio never stops on them. *Yet*
 BC> Does the radio hit them?  Why won't it stop on 'em?  And what happens
 BC> if you manually stop on one?
 I'm far from an electronic tech.
 I can (and have) tried to get the radio to stop on the travelling signals,
 but it won't, so far. The output to the Grove SDU 100 is out of the IF. I
 don't know, and can't read the schematic well enough to tell (and it sure
 isn't mentioned in the service manual!), but there may be a discriminator of
 some sort that will allow the radio to tell the spurious signals from the
 real ones.
 Using the tuning wheel, tuning to one of the internal signals, the S-meter
 won't move, I get nothing with the squelch turned all the way down except
 the normal hash, the radio just doesn't seem to know the signal's there.
 It is interesting to watch, though. When searching the 800 bands,
 especially, some of the time it's difficult to *see* which are internal
 signals, and which are received signals (they aren't all going the wrong way
 on the screen), but of two signals of the same strength on the screen, the
 radio will stop on the real one, and ignore the other. (Which, of course, is
 no guarantee that the ignored one is spurious. But, I can't see any reason
 for it to be skipped, otherwise. I try changing modes,and the result is the
 same.)
 Like I said, I'm no tech, so I may not be describing this right.
Bill Funk:  Internet:  skypilot@starlink.com
	    ASCIi User Group: http://www.starlink.com:80/~ascii
... It is a miracle that curiosity survives formal education. -Albert Ein
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