If that is the one with the High Impedance setting, try that! The direct
setting may not work right. CL

"Ken" wrote in message
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On Mon, 08 Mar 2004 12:39:08 -0600, Bob Miller
wrote:

I have an mfj frequency counter -- inexpensive.
It works okay on strong signals; about 10 watts & up. Doesn't do worth
a darn on QRP signals, 5 watts or less. I'm guessing your chip doesn't
put out enough power for the frequency to be detected. You may need a
more sensitive lab quality detector.

The TTL input is hard-wired to the source; there is no sniffing.

The specs for this meter say 1.5 V max for the TTL signal. I do have
an RF voltage probe; maybe it can measure a square wave digital signal
that is always positive. Maybe the signal is something like 10 mV and
the meter won't read that low.

Ken KC2JDY

Ken
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On Mon, 8 Mar 2004 17:28:33 -0500, "CL"
wrote:

If that is the one with the High Impedance setting, try that! The direct
setting may not work right. CL

Tried 'em both. No help.

Also, I measured the voltage at the subject pin with a Fluke RF
voltage probe: 7 millivolts. That is probably 1/100 of what the
meter needs on the TTL setting.

This is starting to look like an oscilloscope job. To bad I just
returned one I had borrowed [for six months].

Ken KC2JDY


Ken
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On Mon, 8 Mar 2004 17:28:33 -0500, "CL"
wrote:

If that is the one with the High Impedance setting, try that! The direct
setting may not work right. CL

Tried 'em both. No help.

Also, I measured the voltage at the subject pin with a Fluke RF
voltage probe: 7 millivolts. That is probably 1/100 of what the
meter needs on the TTL setting.

This is starting to look like an oscilloscope job. To bad I just
returned one I had borrowed [for six months].

Ken KC2JDY


Ken
(to reply via email
remove "zz" from address)