R&S ZVA8 - Page 424

Repairs R&S ZVA
1177.5333.02 3.116 E-11
 Connect the receiver input (MEAS or REF) to a functioning instrument port using the V-cable.
 Set the ZVA to the CW sweep mode.
 Set the frequencies and output levels (check with power meter) for the port used for the
measurement as indicated in the table and read off the level for the receiver to be tested (wave
quantity ax or bx).
Frequency
Output level
Displayed level ax
Displayed level bx
(w/o Rec Att)
Displayed level bx
(with Rec Att)
10 MHz
-40 dBm
+16 dBm  5 dB
+6 dBm  5 dB
+7 dBm  4 dB
100 MHz
-40 dBm
-4 dBm  4 dB
-14 dBm  4 dB
-13 dBm  4 dB
1 GHz
-20 dBm
1 dBm  4 dB
-9 dBm  4 dB
-8 dBm  4 dB
3 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-8 dBm  4 dB
8 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-8 dBm  4 dB
10 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-8 dBm  4 dB
12 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-8 dBm  4 dB
15 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-7 dBm  4 dB
18 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-7 dBm  4 dB
20 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-7 dBm  4 dB
25 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-6 dBm  4 dB
30 GHz
-20 dBm
2 dBm  4 dB
-9 dBm  4 dB
-6 dBm  4 dB
35 GHz
-20 dBm
3 dBm  4 dB
-8 dBm  4 dB
-5 dBm  4 dB
40 GHz
-20 dBm
3 dBm  4 dB
-8 dBm  4 dB
-5 dBm  4 dB
45 GHz
-20 dBm
5 dBm  4 dB
-8 dBm  4 dB
-5 dBm  4 dB
50 GHz
-20 dBm
5 dBm  4 dB
-7 dBm  4 dB
-4 dBm  4 dB
55 GHz
-20 dBm
5 dBm  4 dB
-7 dBm  4 dB
-4 dBm  4 dB
60 GHz
-20 dBm
7 dBm  4 dB
-6 dBm  4 dB
-3 dBm  4 dB
67 GHz
-20 dBm
7 dBm  4 dB
-6 dBm  4 dB
-3 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 list in the table, the board must be
replaced.
Coupler levels
The following is assumed:
 One reflectometer in the instrument is OK.
Method 1:
The generator section of the associated reflectometer is OK (output level at the port meets
specifications).
 Loosen cable at coupler MEAS_OUT and at coupler REF_OUT at both ends and disconnect at the
coupler.
 Connect the coupler output (MEAS = connector X3 or REF = connector X4) to a functioning port.
Terminate the coupler output that is not used.