R&S ZVA8, Service Manual

Page: 423 / 606

R&S ZVA Repairs
1177.5333.02 3.115 E-11
Testing the Reflectometer RM67
Generator levels
It is assumed that the synthesizer section (synthesizer1) associated with the reflectometer to be tested
is OK.

Loosen cable W514A (GEN -> BIAS 67) or W512A (GEN -> attenuator) at both ends and screw off
at the generator output GEN.

Connect the generator output to the spectrum analyzer using the V-cable (if FSU50 or FSU67 is not
available use a power meter for level measurements).

Set the ZVA to the CW sweep mode.

Set the frequencies listed in the table.

Set the power listed in the table.
Frequency Set power to
(without GenAtt)
Set power to
(with GenAtt)
Level on GEN output 2nd harmonic
10 MHz 10 dBm 9 dBm 13.0 dBm < - 30 dBm
500 MHz 13 dBm 12 dBm 16.0 dBm < - 30 dBc
4 GHz 13 dBm 12 dBm 16.4 dBm < - 30 dBc
8 GHz 13 dBm 12 dBm 16.7 dBm < - 30 dBc
12 GHz 13 dBm 12 dBm 17.1 dBm < - 25 dBc
16 GHz 13 dBm 11 dBm 17.4 dBm < - 25 dBc
20 GHz 13 dBm 11 dBm 17.8 dBm < - 25 dBc
24 GHz 10 dBm 6 dBm 15.2 dBm ---
28 GHz 10 dBm 7 dBm 15.5 dBm ---
32 GHz 10 dBm 7 dBm 15.9 dBm ---
36 GHz 6 dBm 3 dBm 12.3 dBm ---
40 GHz 6 dBm 3 dBm 12.6 dBm ---
45 GHz 6 dBm 3 dBm 13.1 dBm ---
50 GHz 6 dBm 3 dBm 13.5 dBm ---
55 GHz 2 dBm - 1 dBm 10.0 dBm ---
60 GHz 2 dBm - 1 dBm 10.4 dBm ---
67 GHz 2 dBm - 1 dBm 11.1 dBm ---
With the stated levels, the cable loss must still be taken into account.
Receiver levels
The following is assumed:

The LO synthesizer section associated with the reflectometer to be tested is OK.

The network controller associated with the reflectometer to be tested is OK.

One reflectometer in the instrument is functioning.

Loosen the cable to the receiver input MEAS (X6) and the cable to the receiver input REF (X5) at
both ends and screw off at the receiver inputs.