3. Installation ~ Cont.
4. LED Operation Status
There are 3 LED’s located on the side panel of the pre-amplifier. One is for
the Power LED and two are for the Alarm LED’s. (Dual Band Model) For
triple band line amplifiers, there are 4 LED’s.
If the alarm status is RED that means the uplink power of the system is too
high. To adjust this, you need to attenuate the uplink gain of the cellular
repeater in 2dB increments till the LED turns green.
If the alarm status on the repeater is RED or Amber, you will need to
attenuate the downlink gain of the repeater to get the alarm to go green.
After you have made any adjustments, please monitor the alarm LED for a
minute or so to ensure the alarm status is a steady green and not flickering
to RED. If it is flickering, then you need to add more attenuation.
Note: If the pre-amplifier is switched off while connected to the
repeater, it will not pass the RF signal coming from the donor antenna.
5. Troubleshooting
Q1. Why is there still no signal after installing the equipment?
Answer:
1. Check the power source of the amplifier and repeater.
2. Check the connector of outdoor antenna is tight or not.
3. Check the connectors of RF cable are tight or not.
4. Check the outdoor signal is strong enough or not.
5. Check to make sure the antenna is installed correctly.
6. Check the connector of indoor antenna is tight or not.
7. Check the cable type is suitable or not.
Q2. Why the signal strength is too weak on the edge of area?
Answer:
1. Check the outdoor signal and antenna direction.
2. Check repeater is full gain or not.
3. Check all of the connectors are tight.
4. Change the location of outdoor/indoor antenna.
5. Check the cable type is suitable or not.
6. Deploy more indoor antennas.
Q3. Why can’t I make a call after installation, even though I can
detect a signal?
Answer:
1. Check LED status of repeater to make sure alarms are green.
2. Change the location of outdoor / indoor antenna.
3. Reduce the UL gain of the repeater.
Q4. The signal is not stable after turning on the system.
Answer:
1. Check to see if the outdoor signal is stable or not.
2. Check the location of the donor antenna. Too close to other antennas.
3. Check the RF cable is broken or not and has no coils.
4. Confirm direction of donor antenna in relation to cell tower.
Q5. Why is the LED on the front of the repeater not lit?
Answer:
1. Check the power source is normal or not.
2. MUTE feature is active. Attenuate gain of repeater and cycle power.
