EQUIPMENT MANUAL FOR RD-9120
RD-9120 QE
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Page 39
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4.8 COMMISSIONING PROCEDURES
System commission can commence after the monitoring system has initialized. (e.g. when MCU LED L4 is
off and L3 begin to flash). The commission procedure is as follow:
Commissioning Tasks
Observation
1. On-line & inquiry status
z
Enter into RD-9120 Main window. Initialization of monitoring
system will be up in about 2 minutes, at that time, on MCU L4
is off and L3 begins to flash. Click ‘online’ button and inquiry
the repeater’s status. Go to next step if there is no alarm. Else
or, check the point of failure and handle the alarm.
z
Set site ID and telephone number
2. Set On/off Status / operating
band/ gain
z
Click ‘ON’ of power supply and set high edge and low edge of
the repeater’s operating frequency, uplink/downlink master
ATT (the maximum ATT value is +30dBand uplink/downlink
assistant ATT (factory set value is 0dB).
3. Set monitoring system
parameters
z
See RF information.
4. Test DL input power and align
donor antenna
z
Observe DL input power from ‘Field (dBm)’. Align the direction
of donor antenna till the DL input power reading is maximized.
5. Test DL output power and adjust
DL ATT level
z
Set the DL ATT to the optimal level to avoid saturating the DL
PA or to satisfy designing requirement.
6. Test coverage area field
intensity and adjust mobile
antenna .
z
Use test-handset to verify field intensity within the coverage
area. If needed, re-align the mobile antenna to achieve the
coverage as per customer requirement.
z
Note 1: If during operation, the equipment gain could not be
set to maximum or the output power is not high enough due to
influence of donor antenna and mobile antenna isolation, the
value of ‘I’ should be re-calculated. If the output power has
been high enough and ALC is enabled, then adjust gain for the
downlink branch to achieve optimal Gain level
.
z
Note 2: Output power may be variable due to TDMA
technology employed in GSM devices. Take the maximum
value when reading parameters.
7. Verify uplink gain and ensure
test-call is proper and there’re
no interfering BS
z
Adjust uplink gain and carryout test-call. Set the uplink gain
slightly lower than downlink gain. Then carryout test call in the
coverage area while adjusting uplink gain if required. Note: If
the repeater locates near the BTS and the test-call
performance is poor, this may be due to uplink noise interfere
the BTS. Customers can calculate whether the repeater uplink
noise interfere the BTS according to the table in appendix C.
z
Verify again there’s no unacceptable interference to BTS and
Isolation meets the need after test-call.
Table 12: Commissioning procedures
