[time-nuts] Data Precision 8200 Voltage Standard

[Bill Hawkins]

Completely agree with Brooke, with one addition.

Measure power supply voltages at the supply and at the chips. If the
power
is not right, there's no need to look for something more complex.

If the voltages look OK, check for noisy power.

Bill Hawkins
 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Brooke Clarke
Sent: Tuesday, May 05, 2009 9:52 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Data Precision 8200 Voltage Standard

Hi Skip:

Don't know this unit, but can comment on this kind of problem.  The most
likely cause is a poor (oxidized) electrical connection.  So if there
are switches, connectors, sockets, etc. involved then they need to be
cycled a few times.  See What Goes Wrong:
http://www.prc68.com/I/HaT.shtml#Wgw

Another possible problem relates to electrolytic caps where the
electrolyte has gone bad.  You need an Effective Series Resistance (ESR)
meter to check them, see Capacitor Failure:
http://www.prc68.com/I/HaT.shtml#CF

Have Fun,

Brooke Clarke
http://www.prc68.com