Operating Manual

39GHz_L 5G Wireless Optical DAS Operating Manual

Figure 13. DRU Main Screen.

① Information

This item is configured with 'DC' alarm to monitor status of DC 37V supplied through the Bias-T,

and is implemented with 'Temp Comp.' to monitor the enclosure temperature and set temperature

table input value applicability. Also, it sets mRU status, and has Bias-T DC 37V on/off switch. When

there are 2 mRUs connected in the system, put 'mRU#1 Install' and mRU#2 Install' on and then can

check mRU 1 and mRU 2 applied on the 'GUI Tree'. Also when you turn ‘mRU#1 Install’ and ‘mRU#2

Install’ on and supply DC power to mRU, mRU will normally connect and you can check mRU 1 and

mRU 2 status on the 'GUI Tree' as alarm clear(green).

This item below 'Link Pilot' button is used for 'Cable Comp.' function so user does not control this

item.

② DDTU

This item can monitor overall status of DDTU status. It can monitor status and set alarm of

connected optic branch 'OTX' and 'ORX' value, and is configured with 'Link Fail' alarm to check DDTU

'Status' or communication status..

③ MITU

This item is configured with an attenuator that can monitor IF signal strength or power level

received from the MHU and mRU. Also it is configured with 'OTX' alarm and 'ORX' alarm to monitor

strength and status of converted analog optic signal transmit/reception.

Also, it is configured with an attenuator to compensate downlink loss of fiber optic cable, and is

implemented with same function on the DRU as the MHU 'Optic Comp.'. When turning this function

on, cable compensate attenuator is automatically set by automatically measuring fiber optic cable loss

connected between MHU and DRU.

④ Cable Comp. Function

This item is the same function as MDU 'Cable Comp' function. When turning this function on, cable

compensate attenuator is automatically set by automatically measuring fiber optic cable loss