FIXED: Agilent E4418B repair: possibly require the FLASH EEPROM

[analogRF]

...the other side of the new key pad.

[TheSteve]

just a quick update on the final state of the E4418B. I received the key pad from china ($46 incl shipping with UBI which is fairly fast). Photo is attached here. Replaced it and the unit works like a charm now. Slight calibration of the ref. osc. was needed which I crudely did with the help of another E4418A and E4412A power sensor I borrowed again from work. The actual cal process is more complex and requires HP 432A with thermistor which i don't have. but it all works ok now

One thing I noticed and I hope someone could check it, is that if you go to Systems and then to Version, it shows up as E4418A.

Here is the version screen from my E4418B:

[pigrew]

The model ID can be changed over GPIB:

serv:vers:proc "C"
serv:vers:syst "2"

The A and B models have different I/O ports on the back (B has "RMT I/O" and RS232). Switching the model number as above might enable these... I'm not sure. The A and B models use the same firmware. There are also options (listed in the manual) to set the serial number and installed options.

[analogRF]

The model ID can be changed over GPIB:

serv:vers:proc "C"
serv:vers:syst "2"

The A and B models have different I/O ports on the back (B has "RMT I/O" and RS232). Switching the model number as above might enable these... I'm not sure. The A and B models use the same firmware. There are also options (listed in the manual) to set the serial number and installed options.

This is great. I'll look into this. Thanks!

[analogRF]

@pigrew suggestion worked great. here are the pics before and after I run those two SCPI commands
but it seems I should upgrade the firmware as mine is one version old...maybe later...

EDIT: the power LED in the replacement keypad is so shiny and bright I cannot stare at it more than 2 seconds