[Test-Equipment] PTS250 - was General Radio module

[Pete Lancashire]

Finally got it powered up.

As the option plate says, it does not have an internal osc, could
really care less about that.

The problem so far is the 10 HZ DM module is jumping around 1 or 2
units. For example if
the 250 is set at 100,000 KHz, the output jumps exactly 10 or 20 Hz.
Does not seem to care
what the 10 Hz is set to, if 5 the jump is still +10 or 20 Hz Rate is
variable for a few per second
to every 2 seconds.

The other issue is the output drops off very quickly below about 500 KHz

-pete



On Sun, Dec 25, 2011 at 12:46 PM,  <GandalfG8 at aol.com> wrote:
> In a message dated 25/12/2011 19:36:17 GMT Standard Time,
> pete at petelancashire.com writes:
>
> Last  week I got my first PTS. Model 250 M6N10 S/N 1A 6580. no 10 MHz,
> 1 Hz  resolution. Have not powered it up yet, but it is very clean
> inside and  out. Hopefully $100 was not too much.
> ----------------------
> Hi Pete
>
> If PTS is Programmed Test Sources I'd say $100 was a bargain, but then  I'm
> a bit soft on the darn things and ever so slightly biased:-)
>
> As far as I'm aware there's no manual for the PTS250 available online, my
> copy of the GPIB section is out there but I've never got round to scanning
> the  rest of it, but you'll find it shares quite a few modules in common with
> the  PTS160 and the PTS160 manual is at to-way.com and probably on Didier's
> site  too.
>
> I'll try to get the PTS250 manual scanned sometime soon but that won't  be
> for a week or so at the earliest and would be happy to help with any
> specific information in the meantime.
>
> One thing to check, the lower digit modules, from 100KHz down to 0.1Hz are
> all module type DM1005 and I've had at least one PTS500 which was sold as
> having  1Hz resolution, and with a blank switch in the 0.1Hz position, but
> was actually  a 0.1Hz version with the extra module still fitted but a couple
> of bus bars cut  short just before the 0.1Hz switch.
>
> Regards
>
> Nigel
> GM8PZR
>
>
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