Bird Technologies Group 5PI618850 BI-DIRECTIONAL SIGNAL BOOSTER User Manual 61 88 50 V4 less block
Bird Technologies Group BI-DIRECTIONAL SIGNAL BOOSTER 61 88 50 V4 less block
Contents
- 1. users manual 1 of 2
- 2. users manual 2 of 2
users manual 1 of 2
Part No.
Installation and Operation Manual
for the Two-Way Signal Booster System
Model Number 61-88-50
First Printing: May 2004
7-9375-4
Version Number Version Date
1 05/06/04
2 10/06/04
3 10/2704
4 10/29/04
Copyright © 2004 TX RX Systems Inc.
61-88-50 UserMan Page 1 of 29
NOTE
WARNING
Warranty
This warranty applies for one year from shipping date.
TX RX Systems Inc. warrants its products to be free from defect in material and workman-
ship at the time of shipment. Our obligation under warranty is limited to replacement or
repair, at our option, of any such products that shall have been defective at the time of
manufacture.
TX RX Systems Inc. reserves the right to replace with merchandise of equal performance
although not identical in every way to that originally sold.
TX RX Systems Inc. is not liable for damage caused by lightning or other natural disasters.
No product will be accepted for repair or replacement without our prior written approval.
The purchaser must prepay all shipping charges on returned products. TX RX Systems
Inc. shall in no event be liable for consequential damages, installation costs or expense of
any nature resulting from the purchase or use of products, whether or not they are used in
accordance with instructions. This warranty is in lieu of all other warranties, either ex-
pressed or implied, including any implied warranty or merchantability of fitness. No repre-
sentative is authorized to assume for TX RX Systems Inc. any other liability or warranty
than set forth above in connection with our products or services.
Terms and Conditions of Sale
PRICES AND TERMS: Prices are FOB seller’s plant in Angola, NY domestic packaging
only, and are subject to change without notice. Federal, State and local sales or excise
taxes are not included in prices. When Net 30 terms are applicable, payment is due
within 30 days of invoice date. All orders are subject to a $100.00 net minimum.
QUOTATIONS: Only written quotations are valid.
ACCEPTANCE OF ORDERS: Acceptance of orders is valid only when so acknowledged
in writing by the seller.
SHIPPING: Unless otherwise agreed at the time the order is placed, seller reserves the
right to make partial shipments for which payment shall be made in accordance with
seller’s stated terms. Shipments are made with transportation charges collect unless
otherwise specified by the buyer. Seller’s best judgement will be used in routing, except
that buyer’s routing is used where practicable. The seller is not responsible for selection
of most economical or timeliest routing.
CLAIMS: All claims for damage or loss in transit must be made promptly by the buyer
against the carrier. All claims for shortages must be made within 30 days after date of
shipment of material from the seller’s plant.
SPECIFICATION CHANGES OR MODIFICATIONS: All designs and specifications of
seller’s products are subject to change without notice provided the changes or modifi-
cations do not affect performance.
RETURN MATERIAL: Product or material may be returned for credit only after written
authorization from the seller, as to which seller shall have sole discretion. In the event
of such authorization, credit given shall not exceed 80 percent of the original purchase.
In no case will Seller authorize return of material more than 90 days after shipment from
Seller’s plant. Credit for returned material is issued by the Seller only to the original
purchaser.
ORDER CANCELLATION OR ALTERATION: Cancellation or alteration of acknowledged
orders by the buyer will be accepted only on terms that protect the seller against loss.
NON WARRANTY REPAIRS AND RETURN WORK: Consult seller’s plant for pricing.
Buyer must prepay all transportation charges to seller’s plant. Standard shipping policy
set forth above shall apply with respect to return shipment from TX RX Systems Inc. to
buyer.
Disclaimer
Product part numbering in photographs and drawings is accurate at time of printing.
Part number labels on TX RX products supercede part numbers given within this manual.
Information is subject to change without notice.
Symbols
Commonly Used
CAUTION or
ATTENTION
High Voltage
Use Safety
Glasses
ESD
Electrostatic
Discharge
Hot Surface
Electrical Shock
Hazard
Important
Information
61-88-50-UserMan Page 2 of 29
To satisfy FCC RF exposure requirements for transmitting
devices, a separation distance of 1.0 Meters or more should
be maintained between the UPLINK antenna of this device
and persons during device operation. To satisfy FCC RF
exposure requirements for mobile transmitting devices, a
separation distance of 0.3 Meters or more should be main-
tained between the DOWNLINK antenna of this device and
persons during device operation. To ensure compliance,
operations at closer than these distances is not recom-
mended.
The antenna used for this transmitter must not be co-located
in conjunction with any other antenna or transmitter.
WARNING
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pur-
suant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio fre-
quency energy and, if not installed and used in accordance with the instructions, may cause harmful inter-
ference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
— Reorient or relocate the receiving antenna.
— Increase the separation between the equip- ment and receiver.
— Connect the equipment into an outlet on a circuit different from that to which the re- ceiver is connected.
— Consult the dealer or an experienced radio! TV technician for help.
Changes or modifications not expressly approved by TX
RX System Inc. could void the user’s authority to operate
the equipment.
WARNING
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference and
(2) this device must accept any interference received, including interference
that may cause undesired operation.
61-88-50-UserMan Page 3 of 29
Antenna System Installation
The antenna or signal distribution system consists of two branches. An uplink
branch typically uses an outdoor mounted, unidirectional gain antenna such
as a yagi and a downlink signal radiating system consisting of a network of
zero-gain whip antennas or lengths of radiating cable usually mounted inside
of the structure.
Even though the antenna system may not be supplied or installed by TX RX
Systems. The following points need to be observed because both the safety
of the user and proper system performance depend on them.
1) Antenna system installation should only be performed by qualified techni-
cal personnel.
2) The following instructions for your safety describe antenna installation
guidelines based on FCC Maximum RF Exposure Compliance require-
ments.
3) The uplink antenna is usually mounted outside and exchanges signals
with the repeater base station or donor site. It is typically mounted perma-
nently-attached to the building wall or roof. The gain of this antenna should
NOT exceed 10 dB. Only qualified personnel should have access to the
antenna and under normal operating conditions, no one should be able to
touch or approach it within 1 meter (40 inches).
4) The downlink or in-building signal distribution system is connected to the
downlink booster port using coaxial cable. The distribution system may
use radiating coaxial cable or a network 1/4 wave whip antennas whose
gain does not exceed 0 dB for any radiator. These antennas should be
installed so that the user cannot approach any closer than 0.3 meters (12
inches) from the antenna.
61-88-50-UserMan Page 4 of 29
Manual 7-9375-4 10/29/04
Table of Contents
Table of Contents
General Description .............................................................................................. 1
Unpacking ....................................................................................................... 1
Installation ....................................................................................................... 1
Location ....................................................................................................... 1
Mounting ....................................................................................................... 3
Connections ....................................................................................................... 5
AC Line ....................................................................................................... 5
Backup DC Power.................................................................................................. 5
Alarm Terminals (Form-C Contacts) ...................................................................... 5
RF Connections..................................................................................................... 6
Pre-RF Connection Testing................................................................................... 6
Test Equipment ...................................................................................................... 6
Antenna Isolation ................................................................................................... 6
Procedure ....................................................................................................... 6
Increase isolation or decrease gain?..................................................................... 7
Normal Operation .................................................................................................. 7
LED Status Indicators............................................................................................8
Front Panel LED’s ................................................................................................ 8
Module LED’s ...................................................................................................... 8
OLC Light Bars .................................................................................................... 8
Front Panel Controls & the LCD Display................................................................ 8
LCD Display Screen .............................................................................................. 8
Configuration Settings ........................................................................................... 10
Restore Original Configuration ........................................................................... 10
Calibrate Currents .............................................................................................. 10
Set Gain ....................................................................................................... 10
Set Output Level ................................................................................................. 10
Detailed Status Screens ........................................................................................ 10
Amplifiers ....................................................................................................... 10
Power Supply...................................................................................................... 11
OLC ....................................................................................................... 11
OLC Datalog.......................................................................................................11
Alarms ....................................................................................................... 11
LED Indicators .......................................................................................................11
Form-C contacts .................................................................................................... 12
Performance Survey.............................................................................................. 12
Maintenance and Repair ....................................................................................... 13
Power Amplifier Replacement................................................................................13
Module Replacement............................................................................................. 15
Display/User Interface Replacement .....................................................................15
Power Supply Replacement................................................................................... 16
Filter Replacement ................................................................................................ 17
Card Cage Replacement ....................................................................................... 17
Recommended Spares.......................................................................................... 17
61-88-50-UserMan Page 5 of 29
Manual 7-9375-4 10/29/04
Table of Contents
Figures and Tables
Figure 1 Cabinet mounting hole layout 3
Figure 2 Front internal cabinet view 4
Figure 3 AC power entry 5
Figure 4 Measuring antenna isolation 7
Figure 5 Boot-up display 7
Figure 6 Operational status display 8
Figure 7 Menu System 9
Figure 8 Measuring Booster Gain 12
Figure 9 Performance Survey 13
Figure 10 Removing the Power Amplifier (1 of 3) 14
Figure 11 Removing the Power Amplifier (2 of 3) 14
Figure 12 Removing the Power Amplifier (3 of 3) 15
Figure 13 Disconnecting Display/User Interface 16
Table 1 Part Number Designations 1
Table 2 Model 61-88-50 Part Family 2
Specifications 18
Block Diagram High Gain (1 of 4) 19
Block Diagram Med Gain (2 of 4) 20
Block Diagram Low Gain (3 of 4) 21
Block Diagram (4 of 4) 22
Celcius to Farenheit Conversions 23
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Manual 7-9375-4 Page 1TX RX Systems Inc. 10/29/04
GENERAL DESCRIPTION
Signal boosters extend radio coverage into areas
where abrupt propagation losses prevent reliable
communication. No frequency translation (conver-
sion) occurs with this device. Signal Booster II (SB
II) is available in a variety of configurations as
shown in Table 1. The product model number is
used to describe each configuration available. This
manual details the installation and operation of the
61-88-50 series of boosters. The complete product
family for the 61-88-50 boosters are listed in Table
2.
The system can be ordered in one of three maxi-
mum gain configurations including High Gain (+80
dB gain max), Medium Gain (+60 dB gain max),
and Low Gain (+45 dB max gain). The maximum
gain of the system is determined by the exact type
of cards plugged into the low and mid level slots as
shown in the block diagrams at the back of this
manual. The maximum gain of the uplink or down-
link branch is adjustable and can be setup inde-
pendently. In addition, the gain of each branch can
be reduced up to 30 dB in 0.5 dB increments via
software interface.
The bandwidth of the system is determined by the
passband of the input/output filtering. Available
bandwidths are shoen in Table 1.
Three cabinet styles are available. The G1 suffix
denotes a NEMA-4 style cabinet which is suitable
for indoor or outdoor use. The G2 suffix denotes a
stainless steel NEMA-4X style cabinet suitable for
corrosive environments such as salt air and the RM
suffix a rack mount version which is intended for
indoor mounting only.
UNPACKING
It is important to report any visible damage to the
carrier immediately. It is the customer's responsibil-
ity to file damage claims with the carrier within a
short period of time after delivery (1 to 5 days).
Care should be taken when removing the unit from
the packing box to avoid damage to external heat-
sink fins. Use caution because the heatsink fins
can have somewhat sharp corners. Signal Booster
II (SB II) weighs about 85 lbs. so use enough peo-
ple when lifting the unit.
INSTALLATION
The following sections discuss general consider-
ations for installing the booster. All work should be
performed by qualified personal in accordance with
local codes.
Location
The layout of the signal distribution system will be
the prime factor in determining the mounting loca-
tion of Signal Booster II. However, safety and ser-
viceability are also key considerations. The unit
should be located where it cannot be tampered
with by the general public, yet is easily accessible
to service personnel. Also consider the weight of
the unit and the possibility for injury if the unit
should become detached from its mounting sur-
faces for any reason.
Tabl e 1: Part number designations for 61-88-50 booster family.
FAMI LY FREQUENCY
BAND
MODEL MAXIMUM
GAIN
BANDWIDTH ENCLOSURE TYPE
61 = 2 Way 88 = 896 - 902
935 - 941
50 = Signal
Booster II
A = 80 dB
B = 60 dB
C = 45 dB
05 = 6 MHz G1 = Painted, NEMA 4
G2 = Stainless NEMA4X
61 - 88 - 50 - A06 - G1
61-88-50-UserMan Page 7 of 29
Manual 7-9375-4 Page 2TX RX Systems Inc. 10/29/04
Part Mumber Relative Gain Uplink/Dowlink (MHz) Guardband (MHz) Enclosure
61-88-50-A06-G1 High 896-902 / 935-941 33 NEMA 4
61-88-50-B06-G1 Mid 896-902 / 935-941 33 NEMA 4
61-88-50-C06-G1 Low 896-902 / 935-941 33 NEMA 4
61-88-50-A06-G2 High 896-902 / 935-941 33 NEMA 4X
61-88-50-B06-G2 Mid 896-902 / 935-941 33 NEMA 4X
61-88-50-C06-G2 Low 896-902 / 935-941 33 NEMA 4X
Table 2: SB II 61-88-50- part family.
61-88-50-UserMan Page 8 of 29
Manual 7-9375-4 Page 3TX RX Systems Inc. 10/29/04
Although signal boosters can operate for years
without being attended to, the unit will need to be
accessed by service personnel with troubleshoot-
ing equipment, such as digital multimeters and
spectrum analyzer or a laptop computer from time
to time. The location of the power source will also
have a bearing on the mounting location. SB II
uses external heat sinks and needs to be mounted
where there can be an unobstructed air flow over
the heat sinks fins. The SB II cabinet will stay warm
during normal operation so in the interest of equip-
ment longevity, avoid locations that carry hot
exhaust air or are continually hot.
Mounting
Figure 1 shows mounting hole dimensions and lay-
out for the cabinet. Mount the cabinet using 3/8”
(10 mm) diameter steel bolts (not supplied). We
recommend flat washers on both ends and a lock
washer under the nut. Nut and bolt mounting is pre-
ferred to the use of lag bolts. Use backer blocks
where necessary to spread the force over a larger
surface area. In areas of known seismic activity,
additional devices such as tether lines may be nec-
essary.
Because TX RX Systems, Inc. cannot anticipate all
the possible mounting locations and structure
types where these devices will be located, we rec-
ommend consulting local building inspectors, engi-
neering consultants or architects for advice on how
to properly mount objects of this type, size and
weight in your particular situation.
It is the customer’s responsibility to make sure
these devices are mounted safely and in compli-
ance with local building codes.
MOUNTING TABS
DOOR
CLAMPS
0.438" DIA.
(12mm)
0.438" DIA.
(12mm)
SIDE VIEW
18"
(457mm)
21.25"
(540mm)
Figure 1: SB II cabinet mounting hole layout.
61-88-50-UserMan Page 9 of 29
Manual 7-9375-4 Page 4TX RX Systems Inc. 10/29/04
61-88-50
Power Supply
AC Power
Switch
Battery
Backup
Switch
Form-C
Contacts
Connect Backup
Battery here
Uplink Power
Amplifier
Duplexer
Downlink Power
Amplifier
Duplexer
Menu
Select
Buttons
Uplink M/L Card
(for High Gain Model)
Uplink M/L Card
(for Mid Gain Model)
Uplink Low Gain Card
(for Low Gain Model)
Uplink L/L Card
(for High Gain Model)
Attenuator Card
(for Mid Gain Model)
Attenuator Card
(for Low Gain Model)
Uplink
Power
Distribution
Downlink M/L Card
(for High Gain Model)
Downlink M/L Card
(for Mid Gain Model)
Downlink Low Gain Card
(for Low Gain System)
Downlink L/L Card
(for High Gain Model)
Attenuator Card
(for Mid Gain Model)
Attenuator Card
(for Low Gain Model)
Downlink
Power
Distribution
Controller
Downlink In
Uplink Out Uplink Out
Downlink In
AC Power
Entry
Comm-Card
(Optional)
Spare
(unused slot) OLC Light
Bars
Status LEDs
Isolator
Tes t Po r t
Isolator
Te s t Po r t
Display Panel
Figure 2: Front view of SB II. Model 61-88-50 two-way signal booster shown as an example.
61-88-50-UserMan Page 10 of 29
Manual 7-9375-4 Page 5TX RX Systems Inc. 10/29/04
CONNECTIONS
All cabling connections to the booster should be
made and checked for correctness prior to power-
ing up the system.
AC Line
Signal Booster II is designed to be hard-wired to
110 single phase AC lines at 50 - 60 Hz (see Fig-
ures 2 and 3). A junction box is provided for this
purpose. There is a hole provided in the cabinet
bottom-wall for bringing in the AC line. The entry
box contains a standard two-receptacle AC outlet
that serves as a junction for the incoming line and
also provides a convenient AC outlet for running
test equipment. See figure 3 below. Use conduit for
running the wiring into SB II and #14 gauge or
larger conductors.
Backup DC Power
SB II may be run on a DC power source that can
supply 24 to 30 volts DC at 2.5 amps. Screw termi-
nals are provided for this purpose (see figure 2).
This line should be equipped with a fast-acting 3
Amp fuse. Use #16 or #18 gauge wire for this con-
nection.
The power system in SB II automatically switches
to this backup DC input when the AC supply fails
for any reason including a power outage or inten-
tional disconnection.
It is not necessary that this connection be made for
normal operation on the AC line.
Alarm Terminals (Form-C contacts)
Two sets of contacts are provided to monitor the
general operating condition of SB II and are
intended for connection to a supervisory system.
See figure 2.
One set changes state when the AC power supply
shuts down for any reason and the unit switches to
operation on the backup DC power system.
The other set of contacts changes state when any
of a number of fault conditions arises within the
electronics such as current drain outside of the
expected operating range in some module.
A six-terminal strip is provided for the interface and
uses screw terminals for ease of connection. Route
the alarm wires through one of the access holes in
the bottom of the box, strip about 3/16” of insula-
Figure 3: Wiring of AC line entry.
AC Line
Ground Wire
(green or
green/yellow)
Neutral Wire
(white)
Hot Wire
(black)
61-88-50-UserMan Page 11 of 29
Manual 7-9375-4 Page 6TX RX Systems Inc. 10/29/04
tion from each end, loosen the screw terminal,
insert and retighten. Use #20 or #22 gauge insu-
lated wire.
Use of these terminals is optional. SB II also has a
number of status LEDs built-in to individual mod-
ules to indicate a fault condition.
RF Connections
N(F) bulkhead connectors are provided on the bot-
tom of the cabinet for connection to the signal dis-
tribution system. Be sure that the correct branch of
the distribution system is connected to its corre-
sponding Uplink/Downlink connector or the system
will not work properly. Using high-quality connec-
tors with gold center pins is advised. Flexible
jumper cables made of high-quality coax are also
acceptable for connecting to rigid cable sections.
PRE-RF CONNECTION TESTS
Antenna isolation between the uplink and downlink
branches should be measured before connecting
the signal booster to the antenna system. This step
is necessary to insure that no conditions exist that
could possibly damage the signal booster and
should not be skipped for even the most thoroughly
designed system.
Test Equipment
The following equipment is required in order to per-
form the pre-installation measurements.
1) Signal generator for the frequencies of interest
capable of a 0 dBm output level. Modulation is
not necessary.
2) Spectrum analyzer that covers the frequencies
of interest and is capable of observing signal
levels down to -100 dBm or better.
3) Double shielded coaxial test cables made from
RG142, RG55 or RG223 coaxial cable.
Antenna Isolation
Just like the feedback squeal that can occur when
the microphone and speaker get too close to each
other in a public address system, a signal booster
can start to self oscillate. This can occur when the
isolation between the input antenna or signal
source and the output distribution system does not
exceed the signal boosters gain by at least 15 dB.
Oscillation will reduce the effectiveness of the sys-
tem and may possibly damage the power amplifier
stages.
In general, if one or both antenna ports are con-
nected to sections of radiating coaxial cable (lossy
cable) the isolation will be more than adequate
because of the high coupling loss values that are
encountered with this type of cable. When a net-
work of antennas are used for the input and output,
this problem is much more likely. Isolation values
are relatively easy to measure with a spectrum
analyzer and signal generator.
Procedure for Measuring Antenna Isolation
1) Set the signal generator for a 0 dBm output
level at the center frequency of one of the signal
boosters passbands (815 or 860 MHz)
2) Set the spectrum analyzer for the same center
frequency and a sweep width equal to or just
slightly greater than the passband (18 MHz)
chosen in step one.
3) Connect the test leads of the signal generator
and the spectrum analyzer together using a
female barrel connector, see Figure 4. Observe
the signal on the analyzer and adjust the input
attenuator of the spectrum analyzer for a signal
level that just reaches the 0 dBm level at the top
of the graticule.
4) Referring to figure 4, connect the generator test
lead to one side of the signal distribution system
(external antenna) and the spectrum analyzer
lead to the other (internal distribution system)
and observe the signal level. The difference
between this observed level and 0 dBm is the
isolation between the sections. If the signal is
too weak to observe, the spectrum analyzer's
bandwidth may have to be narrowed and its
input attenuation reduced. Record the isolation
value. The isolation value measured should
exceed the signal boosters gain figure by at
least 15 dB.
It is wise to repeat the procedure listed above for
measuring antenna isolation with the signal gener-
ator set to frequencies at the passbands edges in
order to see if the isolation is remaining relatively
constant over the complete width of the passband.
61-88-50-UserMan Page 12 of 29
Manual 7-9375-4 Page 7TX RX Systems Inc. 10/29/04
Increase Isolation or decrease gain?
Modification of the signal distribution system is
required to increase isolation between the up and
downlink path. This will require significant changes
that may or may not be practical from a cost or
logistical standpoint. Gain reduction may be the
only alternative but this is easy to achieve with Sig-
nal Booster II. Gain for both the uplink and down-
link path can be set from 50 to 80 dB. Here are the
steps to follow.
1) Subtract 15 dB from the measured isolation
between uplink and downlink branches of the
antenna/signal distribution system. This is the
maximum usable gain level for both the uplink
and downlink path.
2) Accessing the user menu through the front
panel, set the gain of the uplink path to the level
determined in step 1. A detailed explanation of
how to negotiate the menu system is given on
page 9.
3) Repeat step 2 for the downlink path.
NORMAL OPERATION
Power is applied to the signal booster by turning on
the AC power switch located on the junction box
inside the cabinet, refer to figure 2. The following
startup sequence occurs.
1) At turn-on, the four status LEDs on the front
panel glow red for about 5 seconds as the result
of entering a self-check mode.
2) The two green OLC light bars will be fully lit
along their length for approximately 5 seconds.
3) The LCD display shows the firmware revision
screen for about 5 seconds (see Figure 5).
INTERNAL
SIGNAL DISTRIBUTION
SYSTEM
SPECTRUM
ANALYZER
EXTERNAL
ANTENNA
SIGNAL
GENERATOR
ZERO LOSS
REFERENCE
ISOLATION (dB)
Figure 4: Typical test equipment interconnection for measuring antenna isolation.
Figure 5: Software version is displayed briefly
during the boot-up sequence.
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Manual 7-9375-4 Page 8TX RX Systems Inc. 10/29/04
4) After the self check is complete, the four status
lights should turn green and the light bars
should be dark unless a signal is activating OLC
action in either the uplink or downlink.
If the OLC light-bar segments on both the Uplink
and Downlink display light-up and pulse on and off
every 1 to 3 seconds simultaneously, SHUT OFF
THE POWER IMMEDIATELY! The booster may be
oscillating. Disconnect the uplink and downlink
antenna connections and measure the isolation
between the two branches to insure there is suffi-
cient isolation. Reset the booster gain as needed.
5) The LCD display should appear similar to Fig-
ure 6 after the self check is complete.
LED Status indicators
The SB II front panel has 4 status LEDs that glow
green or red to indicate the general health of 4 sub-
systems from a DC perspective. Additionally, the
plug-in, Low-Level and Mid-Level amplifier cards
have tri-color (green-orange-red) status LEDs visi-
ble when the cabinet door is open.
FRONT PANEL LEDS:
24V: Green indicates the 24 volt DC Power system
is operating properly.
12V: Green indicates the 12 volt DC power system
is operating properly.
UL PA: Green indicates that the uplink power
amplifier is drawing current within the expected
operating range and at a safe temperature.
DL PA: Green indicates that the downlink power
amplifier is drawing current within the expected
operating range and at a safe temperature.
Module LEDS;
Mid-Level, Low-Level, Low Gain Module: Green
indicates current or device temperature within the
expected operating range. Orange indicates cur-
rent or temperature slightly out of the expected
range but the overall booster operation may still
appear normal. Red indicates a large departure
from normal current or device temperature and
booster operation is likely to be affected. See page
9 for more details about alarm operation.
Attenuator Module: Green only indicating Dc
power is applied to the card.
OLC LIGHT BARS
Ideally, there should be little or no light bar activity.
Each light bar segment represents an average 3
dB of OLC gain reduction. OLC (output level con-
trol) is meant to reduce gain for transient episodes
of very strong signals. However, when OLC is
active, gain is reduced for all signals being pro-
cessed by that booster branch and that reduction
may compromise communications for weaker sig-
nals in the booster’s passband.
If more than 2 or 3 light-bar segments are lit up
more than occasionally, it is advised that the gain
of that branch be reduced. See the SET GAIN
paragraph on page 10 for details.
Front Panel Controls & the LCD Display
SB II is software directed so control of the system
is accomplished via user interface with the control
panel using the LCD display screen and the menu
select buttons, see figure 2. A flow chart showing
all of the possible user menu selections is shown in
Figure 7.
LCD Screen
Once the boot-up sequence is completed (after
several seconds) the LCD screen will switch to the
main status display as shown in figure 6. This is the
normal display for the signal booster. The system
will return to this display from any other display if
none of the menu interface buttons are pressed
within 2 minutes. The exception is the OLC status
WARNING
Figure 6: Normal Operational LCD Display.
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Manual 7-9375-4 Page 9TX RX Systems Inc. 10/29/04
GAIN
## dB
## dB
OUT LVL
## dBm
## dBm
UL:
DL:
SBII Status OK
Calibrate Currents
Set Gain
Set Output Level
Change Gain Config
Restore Orig Config
Uplink Low Level Amp
Uplink Mid Level Amp
Uplink Power Amp
Downlink Low Amp
Downlink Mid Amp
Downlink Power Amp
Power Supply
Current OLC Status
OLC Historical Info
OLC Historical Info
Avg
#dB
#%
Day
#dB
#%
UL
Current OLC Status
Uplink
#dB
#%
Downlink
#dB
#%
Name of Amp
Current # Temp #
Amp Status Message
Power Supply Status
24v ### 12v ###
Set Desired Gain
Uplink
## dB
Downlink
## dB
Done
Save Changes?
Ye s N o
Uplink
## dBm
Downlink
## dBm
Done
Set Output Levels
UL >
DL >
____Gain ## dB
____Gain ## dB
Done
Change Gain Config
Are you sure
you want to restore
the Factory Presets?
Ye s N o
Press Enter to
Calibrate Currents
Calibrating . . .
Done Calibrating
Press Enter to Save
Press ENTER key
KEY
61-89A-50 USER MENU 2 (8-20460B)
Press Item Select arrow key
E
EE
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
Detailed Status
Configuration
NOTE:
Press ENTER
to see Downlink
NOTE:
Button press required
to exit this display
NOTE:
Pressing CANCEL always returns
you to the previous menu without
saving changes
NOTE:
If no button is pressed within
2 minutes, system returns to
Main Status Display Screen
NOTE:
This menu screen will also give you
the option to place an amplifier into
Bypass or take one out of Bypass.
Figure 7: Signal Booster II Menu
61-88-50-UserMan Page 15 of 29