[time-nuts] Re: Fei FE-5680A RS-232 interface.

[Bryan _]

You could pop it open to check to double confirm or scope the output for the RS232 levels. I believe all have a Max232 IC near the RS232 serial port. At least mine does. However they made so many revisions it's possible the buyer for a batch never spec'd it as the RS232 was never to be sued, but he board probably has a spot for it.

-=Bryan=-
________________________________
From: Rob040 . via time-nuts <time-nuts at lists.febo.com>
Sent: July 25, 2023 1:30 PM
To: time-nuts at lists.febo.com <time-nuts at lists.febo.com>
Cc: Rob040 . <rob040 at live.nl>
Subject: [time-nuts] Fei FE-5680A RS-232 interface.

Dear all,

I bought myself a Fei FE-5680A with P/N 217400-30352-1, see the picture.
I found out that this is a 10MHz version, also has a 1PPS output, lock indicator and a RS-232 interface. My question is about that latter, is it a real RS-232 port, or do I need to add an external MAX232 or MAX3232 to get it going with the proper levels?
Could not find a clear answer on the wide web...

Best regards, Rob