[time-nuts] New Acquisition: HP-53132A

Michael Perrett mkperrett at gmail.com
Sat Feb 1 22:55:06 EST 2014

According to the manual (in several places):

*It is normal operation for the fan in the Counter to continue to run after
the Counter is*
*placed in Standby mode. Power to the timebase is continuous to maintain
long term*
*measurement reliability, and the fan helps maintain timebase temperature

 perhaps a in-line AC switch?


On Sat, Feb 1, 2014 at 8:50 PM, stan, W1LE <stanw1le at verizon.net> wrote:

> Hello The Net,
> I just got in the counter and the fan is always ON, even with the front
> panel switch OFF.
> I looked in the manual but could not find anyway to change this.
> The counter has the standard internal 10 MHz reference, but I will be
> using a Trimble T'bolt GPS/DO for the external reference.
> The fan is part of the power supply module. I can see a possible need for
> it if a premium ovenized reference is always ON.
> But I do not have the premium internal reference.
> Is there a way to only allow the fan to be ON, if the front panel switch
> is ON ?  Possibly a jumper setting ?
> Are there any key strokes to determine the software version, other than a
> check sum ?
> I do not have the standard HP serial number, with the" vintage"
> (manufacturing date code) code first.
> The unit was manufactured in Korea.
> Stan, W1LE on Cape Cod
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