Annunciator - ADRF PSR-VU-9537-UB Manual

3.2.3 RF
DL DONOR UL DONOR
MODEM_ANT
The RF connections are made via two 4.3-10 female connectors. The RF connector labeled "DL DONOR1", "UL
DONOR" and "DONOR" must be connected to the antenna pointing towards the base station. The RF connection
labeled "DL SERVER", "UL SERVER" and "SERVER" must be connected to the antenna facing the area to be
covered by the BDA. The RF connections must be made using cables with an impedance of 50 ohms.
The separation between the antennas is necessary to prevent oscillation. Oscillation occurs when the signal
entering the system continually re-enters, due to the lack of separation between the donor and server antennas.
In other words, the signal is being fed back into the system. This creates a constant amplification of the same
signal. As a result, the noise level rises above the signal level.
To prevent feedback, the donor and server antennas must be separated by an appropriate distance to provide
sufficient isolation. Isolation is attained by separating antennas a sufficient distance so that the output of one
antenna does not reach the input of the other. This distance is dependent on the gain of the repeater.
 DL DONOR – 4.3-10 female which is used to connect the donor antenna (UHF DL IN)
 UL DONOR – 4.3-10 female which is used to connect the donor antenna (UL OUT)
 DONOR – 4.3-10 female which is used to connect the donor antenna (VHF DL IN)
 DONOR_CPL (30dB) – SMA female 30 dB coupling port which is used to monitor the amplified UL signal
 SERVER_CPL (30dB) – SMA female 30 dB coupling port which is used to monitor the amplified DL signal
 DL SERVER – 4.3-10 female which is used to connect the server antenna (DL OUT)
 UL SERVER – 4.3-10 female which is used to connect the server antenna (UHF UL IN)
 SERVER – 4.3-10 female which is used to connect the server antenna (VHF UL IN)

3.2.4 Annunciator

The Annunciator port provided power and communication to the PSR-ANN annunciator box. The PSR-ANN
annunciator box provides a summary status of the repeater via LED indicator lights and an audible alarm.
The default length of the cable that is provided to connect to the PSR-VU-9537-UBto the PSR-ANN is 2m
(6.5ft). Additional cable lengths at 10ft, 20ft, and 33ft are available. The maximum distance of the cable
between the PSR-VU-9537-UBrepeater and the PSR-ANN annunciator is limited to 10m (33ft).
Advanced RF Technologies, Inc.
DONOR
DONOR_CPL
(-30dB)
DL SERVER UL SERVER
SERVER CPL
(-30dB)
Ext. ALARM
21
SERVER