R&S SMU200A Troubleshooting
1007.9845.82 3.33 E-6
Troubleshooting - Module SSYN
The tests listed below ensure that a supposed error on the synthesis module SSYN is not caused by a
defective or incorrectly connected cable, incorrect adjustment or another module.
Two-path instruments have two synthesis modules. The Synthesis module of Path A contains the
reference quartz oscillator or is synchronised to an external reference. The module of path B is
synchronised to that of path A by a cable connection from SSYN A X245 to SSYN B X246.
Internal adjustment “Adjust Synthesis”
A comprehensive test of the module is to run the internal adjustment.
Error Error correction
Internal adjustment “Adjust
Synthesis” aborts at SSYN-OPU
Adjustment.
Terminate socket X244 with 50 and perform internal
module adjustment. (
SETUP - Internal Adjustment Path
A/B Adjust Synthesis)
Internal adjustment is now performed successfully:
This indicates that termination at X244 is insufficient (defective
cable or output module IQOP3/6).
Adjustment aborts again:
Change module.
Input and Output Signals
Connector,
System
Signal name Setting on Signal
Generator
Frequency Level Signal flow
X242, SMA SYNEX_IN 750 to 1500 MHz 731to 1495.5 MHz 5+-3dBm to SYNEX (when fitted)
X243, SMA SYNEX_OUT 750 to 1500 MHz 750 to 1500 MHz 5+-3dBm from SYNEX (when fitted)
X244, SMA SYNRF 200 to 3000 MHz
0.1 to 200 MHz
200 to 3000 MHz
1040.1 to 1240 MHz,
1200.1 to 1400 MHz
with SYNEX fitted
13±3 dBm
to IQOP3/6
X245, SMP EXTREF_OUT Ext. ref. freq.
5/10/13 MHz
5/10/13 MHz >6 dBm to Rear Panel
or to SSYN B
X246, SMP EXTREF_IN Ext. ref. freq.
5/10/13 MHz
5/10/13 MHz -6 to 19 dBm from rear Panel
or from SSYN A
X247, SMP REF100 B22 fitted 100 MHz 10+-2 dBm from SYNEX
X248, SMP REFVAR SYNEX not fitted
B22 fitted, ref. int.
B22 fitted, ref. ext.
B20 fitted
12.8 MHz
10 MHz
40 MHz
104 MHz
13+-3 dBm
3 V TTL
3 V TTL
3 V TTL
to DACIF
from SYNEX to SYNEX
to SYNEX
X249, SMA REF1040 <200 MHz 1040 MHz
10±2 dBm
to IQOP3
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