help with HP noise figure meter

Probably this just means that with the leads disconnected it finds no device (infinite loss and an infinite noise figure). Try hooking the input/output connections together to see if it tries to measure it's own noise figure...

Glenn

kerl> When I first turn on the meter I believ I should disconnect all leads

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)

Ah, that was it! Hook the leads together as I suggested and have it do a calibration. That will fill the internal cal constants. As snipped-for-privacy@compuserve.com suggested, if it happens again, the next time you do a cold power-up, it means your batteries aren't keeping the data alive when the instrument is off.

The Error is normal for the instrument before calibration (measurment of itself). If it persists it means your battery is tired out.

Glenn