G Way Solutions UHF4W70 Bi-Directional Booster User Manual FCC ID OIW CBDAESMR1W60

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Document ID	1044265
Application ID	dRouf77TxblQH0eWzsNdDQ==
Document Description	User Manual
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Permanent Confidential	No
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Document Type	User Manual
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Filesize	25.53kB (319085 bits)
Date Submitted	2008-12-15 00:00:00
Date Available	2008-12-15 00:00:00
Creation Date	2008-12-12 13:50:11
Producing Software	Acrobat Distiller 8.1.0 (Windows)
Document Lastmod	2008-12-12 13:50:25
Document Title	FCC ID: OIW CBDAESMR1W60
Document Creator	Acrobat PDFMaker 8.1 for Word
Document Author:	Sean

INSTALLATION
AND
OPERATING MANUAL
FOR
BDA-UHF-4/4W-70-A
BI-DIRECTIONAL AMPLIFIER
TABLE OF CONTENTS
PARAGRAPH
PAGE NO
BDA OVERVIEW
TYPICAL INSTALLATION (Figure 1)
BDA BLOCK DIAGRAM DRAWING (Figure 2)
OPTIONAL EQUIPMENT
ELECTRICAL SPECIFICATIONS
MECHANICAL SPECIFICATIONS
ENVIRONMENTAL CONDITIONS
BDA CONNECTIONS
MECHANICAL OUTLINE DRAWING (Figure 3 & 3a)
BDA INSTALLATION
RF EXPOSURE WARNING
BDA OPERATION
MECHANICAL OUTLINE- ADJ. (Figure 4 & 5)
DIAGNOSTICS GUIDE
Page 2
10
11
12
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.
Refer to figure 1 for the following discussion.
The illustration is a typical scenario of In-Building Signal Enhancement. On the top of
the structure, the directional antenna points to closest Base Station (Uplink), the
Indoor repeater is inside the building and internal antennas send and receive signals
from a Mobile telephone.
Figure 1
Page 3
BDA BLOCK DIAGRAM DESCRIPTION:
Refer to figure 2 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, a sample frequency
band in UHF is as follows: 468.0-470.0 MHz for the Uplink and 463.0-465.0 MHz for
the Downlink. Two diplexers isolate the paths and route each signal to the proper
amplifying channel.
An 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.
OPTIONAL EQUIPMENT OVERVIEW:
a.) DC Input Power Option (S1)
The BDA is equipped with both AC and DC voltage inputs for power operation. This
gives the flexibility of powering the BDA with either an AC or DC source. If both
sources are connected, the BDA will automatically select the stronger source for
power.
b.) Uninterruptible Power System (UPS)
An optional UPS is offered for systems that need emergency back-up power. The
system can easily be connected to a battery for uninterruptible operation. Not only
does the power supply power the load, but it also charges the battery. If the AC
power fails, the battery will uphold the load.
Page 4
Figure 2
1.
2.
3.
4.
5.
6.
7.
8.
BDA BLOCK DIAGRAM
BDA-UHF-4/4W-70-A
1. Uplink Diplexer - has low bandpass insertion loss and high selectivity.
2. Downlink Pre-amp - is a low noise amplifier that drives the Downlink MPA and
offers 32dB Gain.
3. Internal Filter Downlink - This highly selective filter gives additional rejection for
increased isolation.
4. Downlink MPA - is a medium power amplifier with an ALC circuit which offers
43dB Gain.
5. Uplink MPA - is a medium power amplifier with an ALC circuit which offers 43dB
Gain.
6. Internal Filter Uplink - This highly selective filter gives additional rejection for
increased isolation.
7. Uplink Pre-amp - is a low noise amplifier that drives the Uplink MPA and offers
32dB Gain.
8. Downlink Diplexer - has low bandpass insertion loss and high selectivity.
Page 5
ELECTRICAL SPECIFICATIONS:
BDA-UHF-4/4W-70-A (SAMPLE)
Specifications
Frequency Range
Uplink & Downlink
Typical
3dB Bandwidth
Minimum passband separation
Pass band Gain @ min attenuation
Variable Step Attenuator Range
(2-dB steps)
Pass band Ripple
20 dB Bandwidth
Uplink
Downlink
Noise Figure @+25 C at max gain
3rd Order Intercept point
Uplink
Downlink
*Output Power @ 1dB Compression
Uplink
Downlink
*Composite Output Power
Uplink
Downlink
*Output Power ALC Set
Uplink
Downlink
Input/ Output Impedance
VSWR (Input/Output)
Power Supply
406.1-454 MHz
456-462.5375 MHz
462.7375-467.5375 MHz
467.7375-512 MHz
2 MHz
5 MHz
70 dB minimum
0-30 dB
±1.5 dB typ.
3.25 MHz typ.
3.25 MHz typ.
5.0 dB maximum
4.5 dB typical
+51 dBm typ.
+51 dBm typ.
+39 dBm typ.
+39 dBm typ.
+31 dBm typ. (conductive power)
+31 dBm typ. (conductive power)
+31 dBm typ. (conductive power)
+31 dBm typ. (conductive power)
50 Ohms
1.5: 1 max
110VAC/1.40Amp
240VAC/0.64Amp
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 6
MECHANICAL SPECIFICATIONS:
Size
: 16.0 x 16.0 x 11.2 inch
: (406 x 406 x 285 mm)
RF Connectors
: N-type Female
Weight
: 48.0 Lbs. (21.6kg.) 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 optional 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 3
UHF
INDOOR REPEATER
Mobile
Base
BDA Mechanical Outline
Figure 3a
Conditions for Optional Alarm
The alarm monitors current of both uplink and
downlink amplifiers. An alarm condition will occur if
(Relay Shown in Non-Alarm Condition)
either uplink or downlink amplifiers are over or
under its current tolerance or if there is no DC
power present.
Page 8
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 Uplink and Downlink attenuation is set to 30 dB. 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 attenuation
is positioned to its maximum setting (30 dB). After verification attenuation,
follow the above steps starting with step 1.
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 0.5 meters (50 cm) between the
antenna and persons within the area. (This assumes a typical antenna with gain of [8
dBi, VSWR ≤ 1.5:1, Zo= 50 ohms, and a cable attenuation of between 2-10 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 2-10 dB).
Page 9
BDA OPERATION
Refer to figure 3 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 (Figure 4). 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 +31 dBm.
The ALC function is integrated in each amplifier. A red indicator lamp located on each
amplifier illuminates when output power exceeds the ALC set point.
To establish proper operating gain on the Uplink and Downlink sides, start with the
Downlink. Verify that the attenuation is set for 30 dB. Observe the red indicator lamp
on the Downlink amplifier. Units are shipping with maximum attenuation. Decrease
attenuation one step at a time until the lamp is lit. Then, increase the attenuation until
the lamp goes off. Repeat the process for the Uplink. The level indicator is accurate
to +/- 0.4 dB of the ALC set point.
Operation of BDA-UHF-4/4W-70-A at minimum attenuation with greater than
-25 dBm average power incident on either BASE or MOBILE port can cause
damage to the BDA.
Page 10
Figure 4
Variable Gain Adjustment Access
Uplink MGC
Power Switch
UPLINK
30
DOWNLINK
30
Downlink MGC
Uplink MPA
ALC circuit inside
Downlink MPA
ALC circuit inside
Figure 5
ALC Indication
AL C
AL C
DOWNLINK
UPLINK
Page 11
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 UHF 450 frequencies, the antenna isolation at 100 m separation
is about 65.5 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 12

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Title                           : FCC ID: OIW CBDAESMR1W60
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