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
