3-57
Performance Tests
PDH/DSn Frequency Measurement and Looped Clock
frequencydisplayedonthe displayisbetween2048.194kHz
and 2048.214 kHz.
11 Verify that the Offset displayed is between 95.5 ppm and 104.5 ppm.
The frequency counter should read 1.00.
12 Set the synthesizer frequency to 1023.898 kHz and verify that the
frequencydisplayedonthe displayisbetween2047.786kHz
and 2047.806 kHz.
13 Verify that the Offset displayed is between -95.5 ppm and -104.5 ppm.
The frequency counter should read 1.00.
14 Set the synthesizer level to +10 dBm, synthesizer frequency and the
HP 37718A/19A to the settings given in Table 3-1 and verify the
displayed Offset at each point.
Table 3-1 PDH/DSn Offsets
Receive
Frequency
Synthesizer
Frequency
Displayed
Offset
8 Mb/s (E2) 4224,000 Hz -4.5 to +4.5 ppm
8 Mb/s (E2) 4223,578 Hz -95.5 to -104.5 ppm
8 Mb/s (E2) 4224,422 Hz +95.5 to +104.5 ppm
34 Mb/s (E3) 17,184,000 Hz -4.5 to +4.5 ppm
34 Mb/s (E3) 17,182,282 Hz -95.5 to -104.5 ppm
34 Mb/s (E3) 17,185,718 Hz +95.5 to +104.5 ppm
140 Mb/s (E4) 69,632,000 Hz -4.5 to +4.5 ppm
140 Mb/s (E4) 69,625,036 Hz -95.5 to -104.5 ppm
140 Mb/s E4) 69,638,963 Hz +95.5 to +104.5 ppm
1.544 Mb/s (DS-1) 772,000 Hz -4.5 to +4.5 ppm
1.544 Mb/s (DS-1) 771,923 Hz -95.5 to -104.5 ppm
1.544 Mb/s (DS-1) 772,077 Hz +95.5 to +104.5 ppm
44.736 Mb/s (DS-3) 22,368,000 Hz -4.5 to +4.5 ppm
44.736 Mb/s (DS-3) 22,365,763 Hz -95.5 to -104.5 ppm
44.736 Mb/s (DS-3) 22,370,237 Hz +95.5 to +104.5 ppm
RESULTS
RESULTS
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