Rohde & Schwarz ZVB 14, Service Manual

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Manual Alignment and Recording Correction Values R&S ZVB
1145.1078.82 2.8 E-4
The values that have been obtained in this way are now written to the hard disk using the Service
Functions described below and then transferred to the EEprom of network controller1.
Example illustrating DC Meas 1 V:
When +1 V is applied, V 1 = 1.023 V is displayed by the R&S ZVB; when -1 V is applied, V2 = -1.011 V
is displayed. The results of the calculation are M = 1.017 and F = 0.0059. The following entries are,
therefore, made:
Select Service Level 2 (see Service Functions).
Set Service Functions (Writing to the hard disk)
3.1.2.5.dc_meas_1V.DcMeasMultiplier.1.017
3.1.2.5.dc_meas_1V.DcMeasOffset.0.0059
etc. for the second measurement input.
Set Service Function (Writing to the EProm)
3.1.2.2
When correction value programming for the two DC voltage measurement inputs has been completed,
end the NWA application and restart.
Check the alignment by applying the four vo1 V, -1 V, +10 V and -10 V and, as a further check,
0 V.
Reading the previous DC values:
Select Read in the Service Function Menu
Set Service Functions:
3.1.2.5.dc_meas_1V.DcMeasMultiplier
3.1.2.5.dc_meas_1V.DcMeasOffset
3.1.2.5.dc_meas_10V.DcMeasMultiplier
3.1.2.5.dc_meas_10V.DcMeasOffset