R&S ZVA8 - Page 425

R&S ZVA Repairs
1177.5333.02 3.117 E-11
 Set the frequencies and levels listed in the table for the reflectometer associated with the coupler
(port) and measure the level (wave quantity bx) at the port used for the measurement as follows:
 Screw the SHORT from the calibration kit to the port connector, save measured values (Data ->
Mem).
 Screw the OPEN from the calibration kit to the port connector.
 Select User Def Math : (lin Mag(Data) + linMag(Mem2)) / 2 , activate Result is Wave Quantity
 Select Math = User Def
Frequency
Level
Output level MEAS
Output level REF
10 MHz
0 dBm
-46 dBm  4 dB
-54 dBm  4 dB
100 MHz
0 dBm
-26 dBm  4 dB
-34 dBm  4 dB
1 GHz
0 dBm
-11 dBm  4 dB
-19 dBm  4 dB
3 GHz
0 dBm
-11 dBm  4 dB
-20 dBm  4 dB
8 GHz
0 dBm
-11 dBm  4 dB
-19.5 dBm  4 dB
10 GHz
0 dBm
-11 dBm  4 dB
-19.5 dBm  4 dB
12 GHz
0 dBm
-11 dBm  4 dB
-19.5 dBm  4 dB
15 GHz
0 dBm
-11 dBm  4 dB
-19 dBm  4 dB
18 GHz
0 dBm
-11 dBm  4 dB
-19 dBm  4 dB
20 GHz
0 dBm
-11 dBm  4 dB
-19 dBm  4 dB
25 GHz
0 dBm
-11 dBm  4 dB
-19 dBm  4 dB
30 GHz
0 dBm
-11 dBm  4 dB
-19 dBm  4 dB
35 GHz
0 dBm
-12 dBm  4 dB
-19.5 dBm  4 dB
40 GHz
0 dBm
-12 dBm  4 dB
-19.5 dBm  4 dB
45 GHz
0 dBm
-12 dBm  4 dB
-21 dBm  4 dB
50 GHz
0 dBm
-13 dBm  4 dB
-21 dBm  4 dB
55 GHz
0 dBm
-13 dBm  4 dB
-21 dBm  4 dB
60 GHz
0 dBm
-14 dBm  4 dB
-22.5 dBm  4 dB
67 GHz
0 dBm
-14 dBm  4 dB
-22 dBm  4 dB
With the stated levels, the cable loss must still be taken into account.
If the measured values are more than 2 dB below the levels in the table, the coupler must be replaced.
Method 2:
The receiver section of the associated reflectometer is OK.
 Loosen the cable at coupler GEN_IN at both ends and screw off at the coupler.
 Connect the coupler (connector X1) to a functioning port.
 Set the frequencies and levels listed in the table at the port used for the measurement and measure
the level (wave quantity ax or bx) at the reflectometer associated with the coupler (port) as follows:
 Screw the SHORT from the calibration kit to the port connector, save measured values (Data ->
Mem).
 Screw the OPEN from the calibration kit to the port connector.
 Select User Def Math : (lin Mag(Data) + linMag(Mem2)) / 2 , activate Result is Wave Quantity
 Select Math = User Def