User Manual

Mission Valley Radio Repeater Equipment + Upgrade
User/Maintenance Handbook
Handbook No. 50-078021HBKM Page 25 of 85
3.8.5 900MHz Programming Procedure
Check that the required downlink and uplink frequencies fall within the operational band limits of the
Cell Enhancer.
For each Downlink and Uplink channel frequency, subtract the appropriate synthesiser offset
frequency from the required operational frequency and record the resulting local oscillator
frequencies.
Divide each Downlink and Uplink local oscillator frequency by the synthesiser channel spacing and
check that the result is an integer (i.e. no remainder).
If the synthesiser division ratio is not an integer value, check the required operational frequency and
repeat the calculation checking for mistakes.
Convert the required local oscillator frequency to synthesiser programming switch state patterns
according to the following table.
NOTE: Ensure that the correct column is used from the table below according to the synthesiser
channel spacing of the particular channel modules fitted to the Cell Enhancer.
Synthesiser offset added when switch in UP position Switch
Number
25kHz channel spacing 100kHz channel spacing
1 +25kHz +100kHz
2 +50kHz +200kHz
3 +100kHz +400kHz
4 +200kHz +800kHz
5 +400kHz +1.6MHz
6 +800kHz +3.2MHz
7 +1.6MHz +6.4MHz
8 +3.2MHz +12.8MHz
9 +6.4MHz +25.6MHz
10 +12.8MHz +51.2MHz
11 +25.6MHz +102.4MHz
12 +51.2MHz +204.8MHz
13 +102.4MHz +409.6MHz
14 +204.8MHz +819.2MHz
15 +409.6MHz -
16 +819.2MHz -