[Test-Equipment] Testing HP Sensors?

[Tedd Doda]

On Fri, 24 Nov 2006 19:48:12 +0100, Marco IK1ODO wrote:

>There is a lot of electronics inside. Better to borrow a 435A or 436A 
>from a friend and do a zero and cal test. If it works I need one 8482A

Hi Guys:

Well, I borrowed a 435A (unknown S/N.....I didn't check before
the owner had to leave) to test the 8482A and 8484A RF sensors.

This is what happened:

The 8482A calibrated just fine to 1mW.

Using the 30 dB pad with the 8484A gave wierd results.
Upon applying the test signal (1mW at 50Mhz), I had to
set the 435A to the 10mW scales to calibrate?

After reading, reading and more reading, it looks like
the 435A needs option 002, which is a different range
knob for use with the 8484? Could it be that simple? 

The more I think about it, the 30 dB pad would provide
a 1 microWatt signal into the sensor, but the 435A
doesn't have a 1 uW full scale setting, so how could
it be calibrated using the supplied range scale?

I also tried using my IFR 1500 service monitor as a
signal source, but the attenuator is so noisy that a
stable signal couldn't be had, although the 435A did
go up and down as the IFR's attenuator was moved.

Does this sound like the sensor is OK?

Thanks a bunch,


Tedd Doda, VE3TJD
www.ve3tjd.com

Lazer Audio and Electronics
Baden,