Installation Guide

Equipment Required Antenna System Calibration
4 - 4 0070-00-0571 Panorama WMTS Installation Guide
4.1.2 Antenna Calibration
• Go to each antenna site and verify each antenna's power LED is illuminated. If not, go
back to the TIM Transceiver and enable the antenna or trouble shoot any problems.
NOTE: Antenna calibration should always be done using the Main
(A) port on the TIM Transceiver.
Main ("A") branch
1. Disconnect the Diversity (B) branch coax cable from the TIM Transceiver.
2. Go to the first antenna to be calibrated on the Main branch. Start with the antenna
closest to the TIM Transceiver and work outwards.
3. Use the test transceiver and the same RF attenuator(s) used to set the reference level.
4. Connect the SMA/SMA adapter cable (P/N 0454-00-0050) to the test transceiver.
5. Connect the other end of the SMA/SMA cable to the input SMA connector on the TIM
Active antenna.
6. At the Wireless Server, observe the RSSI level displayed for the channel corresponding
to the test transceiver.
7. At the antenna site, adjust the uplink DIP switches to the proper gain (shown in
FIGURE 4-3). When properly calibrated, the RSSI level for that antenna should match the
reference level -1dbm to -3 dbm. For example, if the reference level was -40 dbm, the
antenna gain should be -41 to -43 dbm.
NOTE: Do not over-amplify any antenna.
8. Set the downlink DIP switches to the same settings as the uplink switches (shown in
FIGURE 4-3).
FIGURE 4-3
9. Repeat the above procedure for all antennas being installed.
D
O
W
N
L
I
N
K
2dB step
4dB step
8dB step
16dB step
U
P
L
I
N
K
50 ohm SMA Socket
Power LED
2dB step
4dB step
8dB step
16dB step