User's Manual

INSTALLATION GUIDE FOR UHF DAS
ENU STATUS : 1-0-0
Copyright - refer to title page
Page 37
5 COMMISSIONING
5.1 PRE-COMMISSIONING TASKS
After equipment installation, perform the following steps before equipment powering and commissioning:
⚫ Prepare the channel frequencies.
⚫ Verify that the expected voltage, current and power levels do not violate any ratings.
⚫ Visually inspect the power connection within the equipment. Ensure that the power cable is correctly and securely
connected, including the grounding wire, RF cable and other cables.
⚫ Check the grounding connection and verify that the ground resistance is less than 5Ω.
⚫ Test the antenna system and ensure that the echo loss within working frequencies is less than -14dB (VSWR<1.5).
5.2 COMMISSIONING PROCEDURE
Perform the following procedures for system commissioning.
Table 5: Commissioning Task Explanation
Commissioning Tasks
Observation
1. Set filter frequencies
In Master Unit – Device page or on each individual units’ page
⚫ Update the frequency for each filter in the device page
2. Go through commissioning
process
In Master Unit – Commissioning page
⚫ Scan system elements
⚫ Update units’ information
⚫ Isolation test
⚫ Uplink Calibration
⚫ Downlink Calibration
3. Turn on 700/800MHz
switches, turn on filter
switches
In Master Unit – Device page or on each individual units’ page
⚫ Turn on the switches for 700/800MHz and switches for each filter
4. Determine system downlink
gain and uplink gain for each
filter
In Master Unit – Device page
⚫ Determine and set the downlink or uplink gain based on the downlink input
power / the link budget calculation or the design
5. Fine tuning the gain
In each individual units’ page
⚫ You must fine tune the gain individually on each unit
6. Alarm Setting Review
In Master Unit – Management page or on each individual units’ page
⚫ Review the alarm setting for Donor Antenna monitoring, and for dry
contact alarms
End of Section