help with HP noise figure meter

[kerlin]

When I first turn on the meter I believ I should disconnect all leads
and then press the preset button. The displays should then show 30mhz
on the left hand side and Fdb on the right hand side. Mine show 30 mz
and E26. This is some kind od error message I guess. What could be the
prob and does anyone have a manual.
Thanks

 

Error E26 means "internal attenuators not calibrated". You have just to
run at power on the cal routine. If cal constants are lost at the next
day turn on again errE26, the mem bat in the CPU is dead. Be very
careful : there was two models and one is rechargeagle, the other not
(it depends the ser nb)