11.4 Checking instrument functions
Narda NBM-550 121
5. Switch the signal source on
The Probe channel 1...3 display increases: Function
test OK.
Press the ESC button three times to change to the
measurement mode.
The Probe channel 1...3 display does not increase:
Function test not OK.
Do not use the probe any more. Contact the
responsible service center.
Measures to be taken when function test is erroneous:
Repeat the test:
– move the signal source around the probe head to
generate a signal for each of the 3 spatial axes,
– monitor the display while moving the signal source.
Note: Do not use this function test for measurements. This test is
suitable only for checking probes.
All 3 channels must respond to the field source. It is no fault
if some channels display identical values.
The meaning of the channels varies depending on the type
of probe and is irrelevant for this test.
For more details about the probe, refer to the data sheet.
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