HP 37718A Installation And Verification Manual page 125
Communications performance analyzer
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Also See for 37718A:
- User manual (190 pages) ,
- Installation and verification manual (202 pages)
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Performance Tests
SDH/SONET Frequency Offsets
SDH/SONET Frequency Offsets
Specifications
Description
The test uses a Frequency Counter connected to the Multirate Analyzer
module Clock Trigger output port. This output is derived from the Clock
module and is directly related to the SDH/SONET output rate. An
external 10 MHz reference from a Signal Generator is used to clock the
HP37718A/19A and also provides a timebase reference for the Frequency
counter. The counter measures the Clock Trigger frequency to check the
offset accuracy and range.
Equipment Required
Signal Generator
Frequency Counter
T Connector
Procedure
1 Recall the HP37718A/19A DEFAULT SETTINGS as shown on Page 3-
2. Set the Transmitter Output to SDH/SONET.
2 Select CLOCK SYNC [10MHz REF] ON THE HP37718A/19A
display.
TRANSMIT
3 Connect the HP8657A to the HP37718A/19A Unbalanced 75
REF IN port on the Clock Module.
4 Set the Signal Generator frequency to 10.000MHz and amplitude to
+10dBm.
5 Check the Clock Loss Alarm Led is not lit.
±999 ppm
Range
Resolution
0.1 ppm
Accuracy
0.02 ppm
: HP 8657A
: HP 5335A Opt 010
: HP 1250-0781
Ω
2M
3-57
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