Unique Broadband Systems Ltd. DRU1KW 사용자 설명서

 

4.4.4  Placing an Independent DRU in Broadcast Mode 
 

As the repeater 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 

 
Once the LBE 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.  Set SysPowerSetp to the site specific power level (max. 60.0 dBm) – see Figure 4-3, 

config window line 3.  SysPowerSetp is used to set the power level for the LB Main RF 
signal. 

2.  Set SysLbdPowerSetp to the site specific power level (typical value is 27 dB below 

SysPowerSetp) – see Figure 4-3, config window line 6.  SysLbdPowerSetp is used to 

set the power level for the LB Diversity RF signal, which is normally 27 dB below the 
LB Main RF signal. 

3.  Ensure that SysOfnLoss is set to 0.0 dBm – see Figure 4-3, config window line 4. 
4.  Set SysOperatingMode to transmit_only – see Figure 4-3, config window line 1.  

SysOperatingMode is used to set the LB sub-system operating mode. 

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The LED’s on the LB HPA’s will flash green and blue alternately as the HPA’s ramp 
up to the SysPowerSetp target. 

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Once the SysPowerSetp target is reached, the HPA LED’s will be illuminated green.  
It should take less than 

TBD minutes

  for  the  LB  sub-system  to  ramp  up  to  full 

power. 

5.  Ensure that the SysPowerSetp target is reached by viewing the Cpl2ForwardPwr – see 

Figure 4-3, status window line 13. 

6.  Ensure that the TRMS LB Status LED is illuminated green. 

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The TRMS should scan through the channels at a slow rate of approximately 20 

seconds per channel. 

 

 
 

 
 
 

 
 

 
 

 
 

 
 
 

 

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