G Way Solutions 2PGN10W90 Bi-Directional Booster User Manual

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Document ID	548316
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Date Submitted	2005-06-03 00:00:00
Date Available	2005-06-03 00:00:00
Creation Date	2005-04-28 09:56:41
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Document Title	Microsoft Word - BDA-XXX-1!10W-90-A Manual REV1 _G-Wave_ $.doc
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Document Author:	Dino

INSTALLATION
AND
OPERATING MANUAL
FOR
BDA-XXX-1/10W-X0-A
BI-DIRECTIONAL AMPLIFIER
TABLE OF CONTENTS
PARAGRAPH
PAGE NO
BDA OVERVIEW
BDA BLOCK DIAGRAM DESCRIPTION
BDA BLOCK DIAGRAM DRAWING (Figure 1)
ELECTRICAL SPECIFICATIONS
FREQUENCY RANGES (Table 1)
MECHANICAL SPECIFICATIONS
ENVIRONMENTAL CONDITIONS
BDA CONNECTIONS
MECHANICAL OUTLINE DRAWING (Figure 2 & 2a)
RF EXPOSURE WARNING
BDA INSTALLATION
BDA OPERATION
UPLINK MECHANICAL OUTLINE- ADJUSTMENT
(Figure 3)
DOWNLINK MECHANICAL OUTLINE- ADJUSTMENT
(Figure 4)
DIAGNOSTICS GUIDE
Page 2
10
11
12
13
14
BDA OVERVIEW:
The BDA assembly extends the coverage area of radio communications in buildings
and RF shielded environments.
The unit features low noise figure and wide dynamic range. It is based on a duplexed
path configuration with sharp out of band attenuation allowing improved isolation
between the receiving and transmitting paths.
BDA BLOCK DIAGRAM DESCRIPTION:
Refer to figure 1 for the following discussion.
The BDA Downlink path receives RF signals from the base station and amplifies and
transmits them to the subscriber. The BDA Uplink path receives RF signals from the
subscriber and amplifies and transmits them to the base station. The Uplink and
Downlink occupy two distinct frequency bands. For example, the SMR frequency
bands are as follows: 806-821 MHz for the Uplink and 851-866 MHz for the Downlink.
Two diplexers isolate the paths and route each signal to the proper amplifying
channel.
A selectable Automatic Level Control (ALC) allows for output power limiting. A
variable step attenuator gives 0 – 30 dB of attenuation in 2 dB steps. The use of
these controls is covered in the “OPERATION” section, later in this document.
Page 3
Figure 1
1.
2.
3.
6.
4.
5.
BDA BLOCK DIAGRAM
BDA-XXX-1/10W-X0-A
1.
Uplink Diplexer - has low passband insertion loss and high selectivity
2.
Downlink Pre-amp - is a low noise amplifier that drives the Downlink HPA and offers
45dB Gain, 50 dB gain for -90 models.
3.
Downlink PA – is a high power amplifier with an ALC circuit which offers 43dB Gain,
48 dB gain for -90 models.
4.
Uplink MPA – is a medium power amplifier with an ALC circuit which offers 43dB
Gain, 48 dB gain for -90 models.
5.
Uplink Pre-amp - is a low noise amplifier that drives the Uplink MPA and offers 45dB
Gain, 50 dB gain for -90 models.
6.
Downlink Tx filter is enhanced for High Power applications, preventing arching when
the power amplifier approaches the 1dB compression point.
Page 4
ELECTRICAL SPECIFICATIONS:
Frequency Range
: See Table 1
Pass band Gain @ min attenuation
: 80 dB min, 90 dB min for -90 Models
Variable Step Attenuator Range
(2-dB steps)
: 0-30 dB
Pass band Ripple
: ±1.5 dB (typ)
Noise Figure @+25°C at max gain
: 5.0 dB max
20 dB Bandwidth
Uplink
Downlink
: 8 MHz
: 20 MHz
3rd Order Intercept point
Uplink
Downlink
: +45 dBm (typ)
: +50 dBm (typ)
*Output Power @ 1dB Compression
Uplink
Downlink
: +32 dBm (typ)
: +40 dBm (typ)
*ALC Factory Set Point
Uplink
Downlink
: +25 dBm
: +32 dBm
Isolation between Up/Down Link
: 100 dB min
Input/ Output Impedance
: 50 Ohms
VSWR (Input/Output)
: 1.5: 1 max
Power Supply
: 110VAC/1.20Amp
: 240VAC/0.60 Amp
: 50 to 60 Hz
*The Manufacturer's rated output power of this equipment is for single carrier operation. For situations
when multiple carrier signals are present, the rating would have to be reduced by 3.5 dB, especially
where the output signal is re-radiated and can cause interference to adjacent band users. This power
reduction is to be by means of input power or gain reduction and not by an attenuator at the output of
the device.
Page 5
Table 1
Frequency
Band
Downlink
Frequency
Ranges
Uplink
Frequency
Ranges
SMR
CELL A
CELL B
CELL AB
GSM F
GSM H
GSM L
NPS PAC
2PG
2PGN
PS8
PS9
851-866 MHz
869-880 MHz
880-894 MHz
869-894 MHz
935-960 MHz
947-960 MHz
935-947 MHz
866-869 MHz
929-942 MHz
929-942 MHz
851-869 MHz
935-941 MHz
806-821 MHz
824-835 MHz
835-849 MHz
824-849 MHz
890-915 MHz
902-915 MHz
890-902 MHZ
821-824 MHz
898-904 MHz
900-903 MHz
806-824 MHz
896-902 MHz
Page 6
MECHANICAL SPECIFICATIONS:
Size
: 13.5 x 12.5 x 5.6 inch
: (343 x 317.5 x 142.3 mm)
RF Connectors
: N-type Female
Weight
: 20.9 Lbs. (9.5kg.) approx.
ENVIRONMENTAL CONDITIONS:
The unit is designed for indoor applications:
Operating temperature: - 20°C to + 50°C
Storage temperature: - 50°C to + 90°C
BDA CONNECTIONS
The BDA AC power is accepted through a standard 3-wire male plug (IEC-320) with
phase, neutral and ground leads. The AC power is wired to a high efficiency DC
switching power supply which is CE and UL approved. The power supply runs the
amplifiers and the Power On lamp. The metal enclosure of the BDA is connected to
ground.
A 9-pin D-Sub connector provides failure alarm output contacts (see diagram next
page) as well as an optional 12 VDC (250mA) auxiliary output.
The RF connections are made via two type “N” female connectors. The RF connector
labeled “BASE” must be connected to the antenna pointing towards the base station.
The RF connection labeled “MOBILE” must be connected to the antenna facing the
area to be covered by the BDA.
The RF connections must be made through cables with characteristic impedance of
50 ohms.
The isolation between the base station antenna and the mobile antenna should
be at least 12 dB higher than the BDA gain. Isolation less than this value can
cause gain ripple across the band. Isolation equal to or less than the BDA gain
will give rise to oscillations which will saturate the amplifiers and possibly
cause damage to the BDA.
Page 7
Figure 2
IN BUILDING REPEATER
BDA Mechanical Outline
Figure 2a
Alarm Conditions
The alarm monitors current of both uplink and
downlink amplifiers. An alarm condition will occur
if either uplink or downlink amplifiers are over or
under its current tolerance or if there is no DC
(Relay Shown in Non-Alarm Condition)
power present.
N.O.
COM.
N.C.
Page 8
RF EXPOSURE WARNING
In order to satisfy the FCC RF exposure requirements, the BDA/antenna installation
must comply with the following:
The outdoor antenna (Yagi type or similar directional antenna) must be installed so
as to provide a minimum separation distance of 0.3 meters (30 cm) between the
antenna and persons within the area. (This assumes a typical antenna with gain of
[10.1 dBi, VSWR ≤ 1.5:1, Zo= 50 ohms, and a cable attenuation of between 1-10 dB).
The indoor antenna (omni directional) must be installed so as to provide a minimum
separation distance of 0.2 meters (20 cm) between the antenna and persons within
the area. (This assumes a typical wide-beam type antenna with gain of 0-2 dBi,
VSWR ≤ 2:1, Zo= 50 ohms, and a cable attenuation of between 1-10 dB).
Page 9
BDA INSTALLATION
DO NOT APPLY A.C. POWER TO THE BDA UNTIL CABLES ARE
CONNECTED TO BOTH PORTS OF THE BDA AND THE ANTENNAS.
1. Mount the BDA on the wall with the RF connectors pointing DOWN. Using
appropriate screws and anchors, attach the BDA to the wall at the four mounting
holes on the side flanges.
2. Ensure that the isolation between the donor antenna and the service antenna is at
least 12 dB greater than the BDA gain. (Use the higher of the Uplink and Downlink
gains reported on the BDA test data sheet).
3. Connect the cable from the donor antenna to the BDA connector labeled “BASE”
and the cable from the service antennas to the BDA connector labeled “MOBILE”.
4. Open the adjustment access panels on the sides of the BDA and verify that both of
the ALC switches are in their factory preset “ON” positions. Close the panels.
5. Connect the AC power cord to the BDA and then to the power source. Verify that
the “Power ON” lamp is illuminated.
Installation of the BDA is now complete. To adjust the gain controls to suit the
specific signal environment, refer to the next section of the manual.
Note: For repeat installations of existing equipment, make sure the ALC
switches are in the “ON” position and attenuation is positioned to its maximum
setting (30 dB). After verification of ALC switches and attenuation, follow the
above steps starting with step 1.
Page 10
BDA OPERATION
Refer to Figure 3 & 4 for adjustment access location and label.
Variable Step Attenuator
BDA gain can be reduced by up to 30 dB in 2 dB steps using the variable step
attenuator. Gain adjustment is made with rotary switches accessible via the access
door on the BDA enclosure. Arrows on the shafts of these switches point to the value
of attenuation selected. BDA gain can be determined by subtracting the attenuation
value from the gain reported on the BDA Test Data Sheet for that side of the unit.
The attenuators are labeled for Uplink and Downlink.
ALC (Automatic Level Control)
To minimize intermodulation products, each amplifier in the BDA contains an ALC
feedback loop. The ALC circuit senses the output power and limits it to the factory
preset level of +25 dBm on the Uplink and +32 dBm on the Downlink.
ALC function is selected with on/off toggle switches located on each amplifier and
accessible via the access door on the BDA enclosure. A red indicator lamp located
on each amplifier illuminates when output power meets or exceeds the ALC set point.
The indicator is functional regardless of the position of the ALC switch.
Units are shipped with both ALC switches in the “ON” position. To ensure distortionfree operation limited to the set point, keep the ALC’s turned ON.
To establish proper operating gain on the Uplink and Downlink sides, start with the
Uplink. Verify that the ALC switch is in the “ON” position. Observe the red indicator
lamp on the Uplink amplifier. Units are shipping with maximum attenuation. Decrease
attenuation one step at a time until the lamp is lit. Then, using the Uplink step
attenuator, increase the attenuation until the lamp goes off. Repeat the process for
the Downlink. The level indicator is accurate to +/- 0.4 dB of the ALC set point.
Operation of BDA-XXX-1/10W-X0-A at maximum gain with greater than -43 dBm
average power incident for -80 Models and -53 dBm average power incident for
-90 models on the MOBILE port or -38 dBm average power incident for -80
Models and -48 dBm average power incident for -90 models on the BASE port
can cause damage to the BDA.
Page 11
Figure 3
UPLINK
30
UPLINK
OFF
ON
ALC
Adjustment Access Panel and Label
Page 12
Figure 4
DOWNLINK
30
OFF
DOWNLINK
ON
ALC
Adjustment Access Panel and Label
Page 13
DIAGNOSTICS GUIDE
The BDA provides long term, care-free operation and requires no periodic
maintenance. There are no user-serviceable components inside the BDA.
This section covers possible problems that may be related to the installation or
operating environment.
a. Gain Reduction
Possible causes: Bad RF cables and RF connections to antennas, Damaged
antennas.
b. Excessive Intermodulation or Spurious
Possible causes:
Amplifier oscillation caused by insufficient isolation. The isolation between two
antennas is given by the equation:
Isolation = 92.5 + 20 Log (F x D) – Gt – Gr
Where:
F = frequency (GHz)
D = separation (Km)
Gt = transmit antenna gain (in the direction of the receive antenna).
Gr = receive antenna gain (in the direction of the transmit antenna).
For example, at the SMR frequencies, the antenna isolation at 100 m
separation is about 71 dB for omni-directional antennas (0 dB gain). To increase
isolation, the antennas should have higher directivity and must be pointed away from
each other.
c. Occasional Drop-out of some Channels
Possible causes: One channel with very strong power dominates the RF
output of the amplifier.
38 Leuning Street
South Hackensack, NJ 07606
Tel. 201-343-3140 Fax 201-343-6390
sales@gwaverf.com
www.gwaverf.com
Page 14

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Format                          : application/pdf
Title                           : Microsoft Word - BDA-XXX-1!10W-90-A Manual REV1 _G-Wave_ $.doc
Creator                         : Dino
Author                          : Dino

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