R&S ZVA8, Руководство по обслуживанию

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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