R&S ZVA24, Руководство по обслуживанию

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R&S ZVA Repairs
1177.5333.02 3.111 E-11

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.

Connect the receiver input (MEAS or REF) to a functioning instrument port using the K-cable
(ZVA40) or V-cable (ZVA50).

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
10 MHz -40 dBm
+15 dBm

4 dB +7 dBm

4 dB
100 MHz -40 dBm
-5 dBm

4 dB -13 dBm

4 dB
1 GHz -20 dBm
-2 dBm

4 dB -10 dBm

4 dB
3 GHz -20 dBm
-1 dBm

4 dB -9 dBm

3 dB
8 GHz -20 dBm -1 dBm

4 dB -9 dBm

3 dB
10 GHz -20 dBm
-1 dBm

4 dB -9 dBm

3 dB
12 GHz -20 dBm -0 dBm

4 dB -9 dBm

3 dB
15 GHz -20 dBm
-0 dBm

4 dB -9 dBm

3 dB
18 GHz -20 dBm -0 dBm

4 dB -9 dBm

3 dB
20 GHz -20 dBm
-0 dBm

4 dB -9 dBm

3 dB
25 GHz -20 dBm
-0 dBm

4 dB -8 dBm

3 dB
30 GHz -20 dBm
-0 dBm

4 dB -8 dBm

3 dB
35 GHz -20 dBm
-0.5 dBm

4 dB -7 dBm

4 dB
40 GHz -20 dBm
-0.5 dBm

4 dB -7 dBm

4 dB
45 GHz (ZVA50 only) -20 dBm
-0.5 dBm

4 dB -7 dBm

4 dB
50 GHz (ZVA50 only) -20 dBm
-0.5 dBm

4 dB -7 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).