The minimum voltage is +/-3 volts, I'm getting about +/-6 right now.
How does one change the serial port speed, I don't see anything in SatStat.
Bob
----- Original Message -----
From: "John Miles" <[email protected]>
To: "Discussion of precise time and frequency measurement" <[email protected]>
Sent: Sunday, June 13, 2010 8:21 PM
Subject: Re: [time-nuts] My stubborn Z3801A
Still to go: The RS-232 signals look fine going into the cable,
+/-5V, any
ideas why the computer won't read it? Am I missing something? I
tried two
different ports in case I screwed one up one of the ports, but no luck.
Haven't been following the thread so someone may have suggested this before,
but: try another computer, a shorter cable, or perhaps a slower baud rate.
5 volts is near the bottom of the range for RS232 (the signalling levels are
supposed to be closer to +/- 15V, or at least +/- 12V).
Some RS-232 gear is happy with 5V but it isn't optimal in all cases. The
problem you mention is more likely to be either a physical or protocol-level
mismatch than a real hardware fault.
-- john, KE5FX
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
