R&S ZVA8 - Page 404

Repairs R&S ZVA
1177.5333.02 3.96 E-11
Testing the Synthesizer Board
N.B.: Synthesizers with part numbers 1145.xxxx or 1300.xxxx are no longer available. In case of
defect please contact the Central Service in Munich.
 Disconnect source (or local) cable at the reflectometer (1 to 4, depending on which synthesizer
section is to be tested).
 Connect the end of the cable to the spectrum analyzer input via an adapter cable and adapter
SMA-N.
N.B.: Bend the source cable as little as possible, if necessary secure adapter cable with
adhesive tape.
 Enter service function 2.21.2.18.17512345 (IF = 17.512345 MHz).
 [ Mode : Spurious Avoidance : LO > RF ]
 Set the frequencies listed in the table on the ZVA and check the values.
[ Sweep : Sweep Type : CW Mode : CW Frequency : …Hz]
[ Sweep : Single : Restart]
Synthesizer-LS 1305.5300.xx
Source Mod. 02 and Mod. 20
Frequency
(ZVA setting)
Source Level
(Mod. 02)
2nd harmonic
3rd harmonic
300 kHz
+3 dBm to -5 dBm
< -27 dBc
< -30 dBc
100 MHz
+3 dBm to -5 dBm
< -27 dBc
< -30 dBc
1 GHz
+3 dBm to -5 dBm
< -27 dBc
< -30 dBc
2 GHz
+3 dBm to -5 dBm
< -27 dBc
< -30 dBc
3 GHz
+3 dBm to -5 dBm
< -20 dBc
< -30 dBc
4 GHz
+3 dBm to -5 dBm
< -20 dBc
< -30 dBc
6 GHz
+3 dBm to -7 dBm
< -27 dBc
< -30 dBc
8 GHz
+3 dBm to -7 dBm
< -27 dBc
< -30 dBc
Isolation of source switch1 to 4
ZVA frequency 8 GHz
Port no.
Port setting
Source output
Isolation
1
Port1 inactive
Port2 active
X168
X169
-90 dBc ±5 dB
2
Port1 active
Port2 inactive
X168
X169
-90 dBc ±5 dB