Rohde & Schwarz ZVB 14, Service Manual

Page: 139 / 198

R&S ZVB Instrument Construction and Function Description
1145.1078.82 3.71 E-4
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.
Synthesizer1
Disconnect source cable at the reflectometer (1 to 4, depending on which synthesizer section is to
be tested).
Connect the end of the source 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.
Set the frequencies listed in the table on the R&S ZVB and check the values.
[ Sweep : Sweep Type : CW Mode : CW Frequency : …Hz ]
[ Sweep : Single : Restart ]
Synthesizer 1145.xxxx or 1300.xxxx
Frequency
(R&S ZVB
setting)
Level 2nd harmonic 3rd harmonic SSB noise
carrier offset
100 kHz
300 kHz 0 dBm ±3 dB < -28 dBc < -28 dBc -130 dBc
100 MHz 0 dBm ±3 dB < -28 dBc < -28 dBc -130 dBc
1 GHz 0 dBm ±3 dB < -28 dBc < -28 dBc -126 dBc
2 GHz 0 dBm ±3 dB < -28 dBc < -28 dBc -120 dBc
3 GHz 0 dBm ±3 dB < -28 dBc < -28 dBc -116 dBc
4 GHz 0 dBm ±3 dB < -28 dBc < -28 dBc -112 dBc
6 GHz 0 dBm ±3 dB < -28 dBc < -28 dBc -108 dBc
8 GHz 0 dBm ±3 dB < -28 dBc < -28 dBc -105 dBc
Synthesizer-LS 1302.4290. xx
Source Mod. 02
Frequency
(R&S ZVB
setting)
Source Level
( Mod. 02)
2nd harmonic 3rd harmonic SSB noise
carrier offset
100 kHz
300 kHz +3 dBm to -5 dBm < -27 dBc < -30 dBc -130 dBc
100 MHz +3 dBm to -5 dBm < -27 dBc < -30 dBc -130 dBc
1 GHz +3 dBm to -5 dBm < -27 dBc < -30 dBc -126 dBc
2 GHz +3 dBm to -5 dBm < -27 dBc < -30 dBc -120 dBc
3 GHz +3 dBm to -5 dBm < -27 dBc < -30 dBc -116 dBc
4 GHz +3 dBm to -5 dBm < -27 dBc < -30 dBc -112 dBc
6 GHz +3 dBm to -7 dBm < -27 dBc < -30 dBc -108 dBc
8 GHz +3 dBm to -7 dBm < -27 dBc < -30 dBc -105 dBc