3325A SYNTH/FunGen connectors, ampl CAL

[jonpaul]

Bonjour a tous,


Needed to check AC V CAL of my Keysight 34465A DVM, my best choice was  1982 HP 3325A synth. as I have no Fluke 5100 etc CAL.

Unearth the HP unused for about 15-20 years...turns on ...BLANK DISPLAY!   

By the time I found the bound loose-leaf orig serv man, and powered on off a few time...IT WORKED!

Opened up, super clean, gold plated boards made in USA 1982 clean as new!

After self check, warmup and CAL, seems 100%!

 So, checked sine  results at 1 mV ...1V RMS and 1 kHz..300 kHz.

All my ACV meters, HP 400 FL, HP 3400A Fluke 8920 and 8921 TRMS. also with  Fluke 8842A DVM
 consistent results with error ~ 1.0033 for a 1.000 VRMS 3325 setting.

1/  The amplitude adjust procedure in the  service manual seems to be  complex. Anyone ever CAL the amplitude on 3325A?

2/ These seem prone to flaky Molex or RCA connectors used for interboard connections. Exercise them, contact cleaner, connector plus etc?


Appreciate any experience or any tips.

Many thanks


Jon

[Simon]

https://www.eevblog.com/forum/testgear/keysight-officially-lost-the-plot-dont-buy-if-youre-a-hobbyist/msg3866078/#msg3866078