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Performance Tests
ETSI/ANSI Internal Transmitter Clock Rates (Option UKZ)
ETSI/ANSI Internal Transmitter Clock Rates (Option
UKZ)
Specification
Description
A frequency Counter terminated in 75 ohms and connected to the Option UKZ Trans-
mit Module front panel Clock Out Port is used to verify the frequency accuracy of
the transmitted data at all rates.
DS3 Frequency Accuracy
1. Recall the HP 37717C Default Settings as shown on 3-2.
2. Connect the Clock Output port on the HP 37717C Option UKZ Transmit Module
to the Frequency Counter Channel A. Terminate in 75 ohm.
3. Adjust the Frequency Counter ATTEN and Trigger Level to obtain a stable
reading and ensure that the frequency counter reading is between 44735798.6 Hz and
44736201.4 Hz
4. Select the HP 37717C TRANSMIT page, select PHYSICAL LAYER and set
FREQUENCY OFFSET to [+20PPM].
5. Adjust the Frequency Counter ATTEN and Trigger Level to obtain a stable
reading and ensure that the frequency counter reading is between 44736693.4 Hz and
44737096.0 Hz.
6. Set the FREQUENCY OFFSET to [-20PPM].
Rate Frequency Accuracy Temperature
Stability
Ageing
Stability
DS1 1.544Mb/s +/-0.7ppm @25C <=3ppm (0 to +50C) <=1ppm/Year
DS3 44.736Mb/s +/-0.5ppm @25C <=3ppm (0 to +50C) <=1ppm/Year
E1 2.048Mb/s +/-0.5ppm @25C <=3ppm (0 to +50C) <=1ppm/Year
E3 34.368Mb/s +/-0.5ppm @25C <=3ppm (0 to +50C) <=1ppm/Year
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