Microwave Networks
CM 100Base-T System User’s Manual
7/23/03
Page 6-9
2.
Select View Measurements (005) and press <Enter>.
The measurements available for viewing are: TX power output, receive signal level, slope
amplitude stress, and system temperature.
Field Changes
Changing LO Frequency
The RF operating frequencies (transmit and receive) are based on the LO frequency
produced by the synthesizer on each RXU. The LO frequency is either plus or minus the
RX frequency. The LO frequency should be verified/adjusted at initial installation and
checked periodically to ensure that the LO has not drifted. The LO frequencies are set at
the factory according to the customer order.
The LO frequency may change a small amount due to a test equipment calibration error
or equipment/radio ambient temperature. It is NOT necessary to adjust the frequency as
long as it is ±5 kHz of desired.
CAUTION
Do not readjust the LO if the frequency is ±5 kHz of the desired TX/RX frequency.
Check LO Frequency
To verify the LO frequency, connect the frequency counter at the LO MON connector of
the RXU under test and read the frequency. If the measured LO frequency exceeds the
specified range listed in Appendix E, but still is ±100 kHz of the desired setting, then
readjust LO frequency using a tuning tool at the front of the corresponding RF module. If
the adjustment is out-of-range, toggle the front panel DIP switch and repeat the
adjustment process.
Change LO Frequency
If the measured LO frequency exceeds ±100 kHz of the desired frequency, verify the DIP
switch settings on the synthesizer. Perform this procedure using the following steps:
Remove the selected RXU and compare/set DIP switches according to the settings shown
in Appendix E.
Replace selected RXU in the shelf. Adjust the LO frequency to within
±
200 Hz of desired
frequency using FREQ ADJ and the front panel LO FREQ. ADJ. switch.
If the desired frequency is not achieved, replace faulty module and repeat the LO
frequency verification test. Otherwise record the LO frequency. Repeat this procedure for
each RXU in the system.
Changing Configuration
The common protection changes are upgrading a terminal from non-protected to hot
standby, and upgrading a hot standby terminal to include space diversity receiver
protection.
The radio is available as a non-protected radio, but with an RF Branching Network for a
hot standby radio. This configuration allows you to convert the non-protected radio to hot
standby at a later time without losing traffic.
To change the protection configuration of the radio, perform the following procedure.
CAUTION
Summary of Contents for CM7
Page 2: ......
Page 4: ...Page iv 5 04 05 CM7 8 100Base T System User s Manual ...
Page 16: ...Glossary Page xvi CM System Users Manual X Y Z ...
Page 24: ...Microwave Networks CM7 8 100Base T System User s Manual Pagexxiv ...
Page 62: ...Chapter 2 Operation Page 2 18 5 02 05 CM 100Base T System User s Manual ...
Page 64: ...Chapter 3 Module Descriptions Page 3 2 CM7 8 100Base T ...
Page 88: ...Section 3 3 Transmitter Unit Page 3 3 6 CM7 8 System User s Manual ...
Page 96: ...Section 3 5 RF Power Supply Unit Page 3 5 4 CM System User s Manual ...
Page 100: ...Section 3 6 SP Power Supply Unit Page 3 6 4 CM System User s Manual ...
Page 106: ...Section 3 7 Alarm and Control Unit Page 3 7 6 11 18 03 CM 100Base T System User s Manual ...
Page 124: ...Section 3 11 SYNDES Page 3 11 6 CM System User s Manual ...
Page 130: ...Section 3 12 SCU Page 3 12 6 11 18 03 CM 100Base T System User s Manual ...
Page 138: ...Section 3 13 OWU Page 3 13 8 CM System User s Manual ...
Page 150: ...Section 3 15 NMU Page 3 15 6 CM System User s Manual ...
Page 192: ...Chapter 5 Verification Page 5 20 CM System User s Manual ...
Page 194: ...Chapter 6 Maintenance Page 6 2 7 23 03 CM 100Base T System User s Manual ...
Page 224: ...Chapter 6 Maintenance Page 6 32 7 23 03 CM 100Base T System User s Manual ...
Page 226: ...Site Engineering Page 2 CM System User s Manual ...
Page 230: ...Appendix A T I Curves Page A 4 CM7 8 100Base T System User s Manual ...
Page 267: ...Microwave Networks CM System User s Manual PageB 37 ...
Page 268: ...Appendix B QuikLink Page B 38 CM System User s Manual ...
Page 282: ...Appendix D Alarm Codes Page D 6 5 02 05 CM 100Base T System User s Manual ...
Page 290: ...Appendix E Setting Frequency Page E 8 CM7 8 System User s Manual ...
Page 312: ...CM7 8 100Base T System User s Manual Page I 4 Microwave Networks ...