[Test-Equipment] Tek TDR

[Dave]

Which Suffix does your 1503 have? My 1503C does not have a panel "Zero 
Ref" knob.
Even without a "zero" set point you should see a trace on the screen. If 
you see the trace shift your Horizontal position control clockwise and 
look for the "0" pulse.
If no trace is present start by checking voltages in the unit. Your 
manual should be sufficient for that task
I've worked on the B and C. I have not worked on the "original" run.
What installed options do you have?

Dave, W5WP


bonddaleena at aol.com wrote:
> Hi, I recently purchased a very nice Tek 1503 TDR. Even the battery is 
> good and holds a charge!
> I have a 1503 manual (from W7FG) that is 'slightly' different from my 
> 1503 TDR, but in any case, I seem to have a problem.
>
> All the knobs function EXCEPT for the "Zero Ref Set" knob. This knob 
> does nothing. I cannot see a pulse on the CRT. The TDR is producing 
> pulses, as seen on my 'O' 'scope......
> Anyone have any experience with these? Anyone know of a good, 
> reasonable, repair center for these?
>
> Thanks for any direction!!!!
>
> ron
> N4UE
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