Comprod Communications BDA-138174 Bedienungsanleitung
COMPROD COMMUNICATIONS LTD.
Customer Instruction Manual
Model#BDA-138174
VHF
BIDIRECTIONAL AMPLIFIER
Technical manual
2018, Comprod Communications LTD.
88 Industriel Blvd
Boucherville, QC, J4B 2X2
Phone 1.800.641.1454 • Fax 1.800.641.4616
3405 N. Benzing Road
Orchard Park, NY, USA 14127
Phone 1.800.603.1454 • Fax 1.800.554.1033
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
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IMPORTANT:
The integrator is responsible for its product to comply with IC ICES-003 & FCC Part 15, Subpart B –
Unintentional Radiators. Final product must comply with unintentional radiators before declaring compliance
of their final product to Part 15 of the FCC Rules and Industry Canada ICES-003.
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
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Based on the philosophy ofAnytime, Anywhere, and Anyplace, the VHFamplifier 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℃
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
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Block Diagram Details
-The VHF Amplifier module contains a (Low Noise Amplifier) LNA designed to detect a very weak
signal. This stage is bypassed if the signal level at the input is higher than -20dBm
-The LNA is followed by an Automatic Gain Control (AGC). The AGC circuit measures composite
power level at the VGA input and adjusts the gain automatically, in order to maintain a constant signal
level at the VGA output delivered to the Power Amplifier (PA). Channel filters are inserted, in order to
reject adjacent channel signals and to improve the signal quality.
-The PA provides good performance for both linearity and efficiency. This amplifier has a heat sink
mounted to it. It has a high compression point and a high 3rd order Intercept point.
-The main AC input accepts 50/60 Hz with a 115 to 220 V AC power source. The Power Supply Unit
(PSU) converts AC to DC voltages to supply DC power to the amplifiers, monitoring and control units.
-The unit does not have a built-in UPS/Battery system. In case of inconsistency in the AC line power,
surge protection, short blackouts, high crossover time from the line AC to generator power, circuit
breaker for short circuit and overload protection, etc., an external UPS/Battery system is recommended.
-The amplifier is intended to be used in a BDA system that includes two duplexers; one at the BTS port
allowing the use for only one donor antenna for both UL and DL. The second duplexer is mounted at
the Service DAS antenna port. These duplexers provide at least 100 dB isolation at each end between
the two paths.
-A set of manual gain controls (MGC), ranging from 0 to 30 dB in 2 dB steps. Another set ranging from
0 to 15 dB in 1 dB steps are also added in the chain for additional attenuation if it is needed.
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
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UDA LINK BLOCK DIAGRAM
RF_IN
RF_OUT
HPA_IN
HPA_OUT
SUB
CONTROL
PSU
RFM1
RFM2
SUB2 SUB1RS232PSU
MCU
RS232
RFM1 MCU1
SUB
RFM2 MCU2
RFM2
PSU
DC IN
RFM1 MCU
AC IN
MCU
RF_IN
RF_OUT
HPA_IN
HPA_OUT
SUB
UDA
#2
PSU
MCU
220VAC
UDA
#1
CONTROL
48VDC
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
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Sub B’d Card
LED Alarms
MGC
HPA
DPLX
Power Supply (PSU)
DPLX
Donor
Antenna
(Base)
DAS Service
Antenna
(Mobile)
10,20,
..
1,2,3,..
Det
1,2,3,..
10,20,..
Monitoring & Control Unit
MGC ATT MGC ATT
MGC ATT
MGC ATT
HPA LNA
LNA
AGC ATT
AGC ATT
AC
DC
Down Link Path
UP Link Path
RS 232USB (Optional)
Clk,Data,En
Det
Clk,Data,En
Det
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
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Led Indicator Alarm and Manual Level Control.
-The unit has visual alarms using LED indicators for the following conditions; AGC, S/D, OSC, power
and VSWR.
oAGC: alarm turns red when the AGC is not delivering any attenuation. This can happen in two
situations. Either the AGC is turned off by the user (see monitoring and control section) or if
the signal at input of the DL istoo weak. Thisis not necessarily a failure. It canjust be a warning
that the signal from the BTS is too weak.
oS/D: The shutdown indicator turns red when the system is in automatic shutdown. This happens
when the internal temperature is too high or when the output power exceeds the maximum limit
allowed. When the RF module is turned off by the user (see monitoring and control section)
the S/D indicator will start flashing.
oThe Power indicator turns red when the RFM is not receiving the correct DC power.
oOSC indicator turns red when oscillation occurs in the system.
oVSWR indicator turns red when an antenna mismatch occurs in the system.
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
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Monitoring and Control
The monitoring and control function is possible by connecting the BDA through a serial RS232 connector. A
Serial to USB adapter is available upon request.
The software designed for this purpose is provided. This software should be installed on a computer with
Windows, XP, Vista, 7, 8 or 10 versions. When you run the software, you will see the screen shown below.
Set the proper com port (1~99) or AUTO and press Connect (recommended).
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When GUI connect to PC properly, TX, RX LED should be blinking and all parameters is displayed.
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Status & Control
Status & Control menu consists of RF Control, PSU status, System Info, and Alarm status.
UDA ON/OFF: The MCU of UDA can control two UDA’s. If #1 is on and #2 is off, the parameters of #1 are
displayed and the parameters of #2 are hidden.
Inhaltsverzeichnis
Andere Comprod Communications Verstärker Handbücher
