User's Manual

Chapter 4 Commissioning
4.4.4 Placing an Independent DRU in Broadcast Mode
As the r
epeater is divided into LB and HB sub-systems, each sub-system must be placed in
broadcast mode, independent of the other. It is recommended that the LB sub-system is
placed in broadcast mode before the HB sub-system is placed in broadcast mode.
4.4.4.1 Low Band Sub-system
Once the L
B
E is powered up and all LBE alarms have cleared, the operator can place the LB
sub-system in broadcast mode using the LBE GUI as follows:
1. Configure “SysExciterPwrSetp” so that the HPA input power level is -5.0 dBm, +
0.5
dB – see Figure 4-5
.
o Navigate to the “HPA Overview” page to verify the “HpaInputPower” level – see
Figure 4-6
.
2. Set “SysPowerSetp” to the site specific power level (max. 62.4 dBm) – see Figure 4-5
.
3. Set the Low Band Diversity power level according to SXM instructions.
4. Ensure that “SysOfnLoss” is set to the value listed in the DRU-2KW test report – see
Figure 4-5
.
5. Ensure that “SysLbdOfnLoss” is set to the value listed in the DRU-2KW test report –
see Figure 4-5
.
6. Set “SysOperatingMode” to “broadcast” – see Figure 4-5
.
o The LED’s on the LB HPA’s will flash green and blue alternately as the HPA’s ramp
up to the “SysPowerSetp” target.
o Once the “SysPowerSetp” target is reached, the HPA LED’s will be illuminated
green. It should take approximately 10 minutes for the LB sub-system to ramp up
to full power.
7. Ensure that the “SysPowerSetp” target is reached by viewing “Cpl2ForwardPwr” – see
Figure 4-5
, status window line 14.
8. Ensure that the TRMS LB Status LED is illuminated green.
o The TRMS should scan through the channels at a slow rate of approximately 20
seconds per channel.
SX03-30000-01-M01
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