V H F B I D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L
3
Based on the philosophy of Anytime, Anywhere, and Anyplace, the VHF amplifier module is designed
for ease of use to be adaptable to various needs in the field. Recently developed technologies are
utilized. With the use of modern integrated circuits and RF components, this Comprod design ensures
constant performance and a reliable amplifier system.
The VHF MHz amplifier has also been designed with government agencies in mind. These agencies
require the highest level of performance and quality for continuous duty solutions while providing
maximum coverage. This amplifier module is aimed for use in buildings, tunnels, government
facilities, airports, providing the required communication throughout.
The amplifier module helps to increase the coverage of RF communications in buildings or places
where RF is unable to penetrate from the base station site. The Amplifier Module can be used in both
Uplink and Downlink directions and it is connected to either a radiant cable, or a distributed antenna
system at one end. At the other end it’s connected to the donor antenna.
Main Specifications:
No
Parameter
Specification
Remarks
1
Operating Frequency
138 ~ 174MHz
The unit tested and certified for:
-FCC allocation values:
150.05-173.4 MHz
-IC (Industry Canada) allocations Values:
138-144 MHz
148-149.9 MHz
150.05-174 MHz
2
Pass Bandwidth
-
Tuned to custom Freq
3
Passband Ripple
±
1.5dB
4
Maximum Gain
75 dB
This is the measured gain including the filter
and the connections
5
Input Manual Attenuation
30dB / 2dB step
controlled by Rotary switch
6
Output Manual Attenuation
15dB / 1dB step
controlled by Rotary switch
7
Automatic Level Control
30dB
controlled by MCU
8
Output Power
30 dBm
9
Noise figure
2dB
Max Gain, RFM only
10
IP3
+48dBm
11
VSWR
1.5 max
12
Alarm
AGC, S/D, VSWR, OSC
Alarm: High, Normal Low
13
Voltage
+48V +6V
14
Impedance
50Ω
15
In/Out Connector
N (F)
16
Operating Temp
-20 ~ +55℃
