R&S ZVA8, Руководство по обслуживанию

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Repairs R&S ZVA
1177.5333.02 3.112 E-11

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
using the K cable . Terminate the coupler output that is not used with an K-termination (V-
termination).

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
-47 dBm

4 dB -55 dBm

4 dB
100 MHz 0 dBm
-27 dBm

4 dB -35 dBm

4 dB
1 GHz 0 dBm
-10 dBm

4 dB -18 dBm

4 dB
3 GHz 0 dBm
-11 dBm

3 dB -19 dBm

4 dB
8 GHz 0 dBm -11 dBm

3 dB -19 dBm

4 dB
10 GHz 0 dBm
-11 dBm

3 dB -19 dBm

4 dB
12 GHz 0 dBm -11 dBm

3 dB -20 dBm

4 dB
15 GHz 0 dBm
-11 dBm

3 dB -20 dBm

4 dB
18 GHz 0 dBm
-11 dBm

3 dB -20 dBm

4 dB
20 GHz 0 dBm
-11 dBm

3 dB -20 dBm

4 dB
25 GHz 0 dBm
-12 dBm

3 dB -20 dBm

4 dB
30 GHz 0 dBm
-12 dBm

3 dB -20 dBm

4 dB
35 GHz 0 dBm
-13 dBm

4 dB -19.5 dBm

4 dB
40 GHz 0 dBm
-13 dBm

4 dB -19.5 dBm

4 dB
45 GHz 0 dBm
-13 dBm

4 dB -19.5 dBm

4 dB
50 GHz 0 dBm -13 dBm

4 dB -19.5 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 using the K-cable (ZVA40) or V-cable
(ZVA50).

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).