[Boatanchors] IFR1600S calibration problem

[Yong Surk Lee]

Hello all;

I am located in Seoul, Korea and my ham call sign is HL1FB/WW6N.

I own a service monitor IFR1600S which I use to repair and calibrate ham equipments.

Recently it is beginning to show faulty FM deviation when in FM signal receiving mode.

For example, when receiving 145MHz FM signal, positive deviation always indicates 1.8KHz even when there is no signal input.

I guess it is calibration problem. Could someone suggest what needs be calibrated?

A local ham told me the IFR1600S has a setup software calibration menu that needs a password to initiate but I do not know what the password is.

Could someone help??