[time-nuts] HP Z3801A - How to convert the 1PPS & 10MHz Differential Pseudo ECL Output?
John Ackermann N8UR
jra at febo.com
Sun Apr 9 21:06:29 EDT 2006
I didn't convert the PECL signals, but instead went inside the unit and
tapped off the 1pps and 10MHz signals. I have details at
http://www.febo.com/time-freq/gps/z3801a/mods/index.html
John
----
Don Mimlitch said the following on 04/09/2006 08:41 PM:
> I have a HP Z3801A which outputs the 1 PPS and 10MHz as Differential Pseudo ECL. What is this?
>
> How do I access these signals? How do I convert them to TTL or CMOS Levels. Are there any IC's (DIP Package) to do the conversion? For short cable runs (2 or 3 Ft.) is there a simple circuit for conversion? Also, how might I convert the 1PPS to an RS232 Level. Can I use an RS422/RS485 converter?
>
> I should mention that this unit was converted to RS232 for the RS422 transmit/receive signals which includes a jumper header with only 6 of the jumpers inserted. I wonder if the Z3801A already has circuitry to convert these signals like it does for the RS422 to RS232?
>
> Any help would be appreciated.
>
> Thanks
> Don Mimlitch
> donmeis at yahoo.com
>
>
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