Bird Technologies Group 5PI616550 SIGNAL BOOSTER II (SB II) User Manual 9415cvr 1 4

Bird Technologies Group SIGNAL BOOSTER II (SB II) 9415cvr 1 4

UserManual.wiki >

Bird Technologies Group >

5PI616550 User Manual HTML Version

USERS MANUAL

Part No.

61-65-50 UserMan page 1 of 24

Installation and Operation Manual for the

Two-Way Signal Booster System

Model Number 61-65-50

First Printing: April 2006

7-9415-1.4

Version Number Version Date

1 04/18/06

1.2 05/08/06

1.3 08/31/06

1.4 08/31/06

61-65-50 UserMan page 2 of 24

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

61-65-50 UserMan page 3 of 24

To satisfy FCC RF exposure requirements for transmitting

devices, a separation distance of 100 Centimeters or more

should be maintained between the UPLINK antenna of this

device and persons during device operation. To satisfy FCC

RF exposure requirements for transmitting devices, a sepa-

ration distance of 30 Centimeters 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

For Class A Unintentional Radiators

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to

part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful inter-

ference when the equipment is operated in a commercial environment. This equipment generates, uses,

and can radiate radio frequency energy and, if not installed and used in accordance with the instruction

manual, may cause harmful interference to radio communications. Operation of this equipment in a resi-

dential area is likely to cause harmful interference in which case the user will be required to correct the

interference at his own expense.

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.

61-65-50 UserMan page 4 of 24

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 100 Centimeters (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 30 Centimeters

(12 inches) from the antenna.

61-65-50 UserMan page 5 of 24

Manual 7-9415-1.4 08/31/06

Table of Contents

General Description .............................................................................................. 7

Unpacking ....................................................................................................... 7

Installation ....................................................................................................... 7

Location ....................................................................................................... 7

Mounting ....................................................................................................... 9

Connections ....................................................................................................... 10

AC Line ....................................................................................................... 10

Backup DC Power.................................................................................................. 10

Alarm Terminals (Form-C Contacts) ...................................................................... 10

RF Connections.....................................................................................................11

Pre-RF Connection Tests......................................................................................11

Test Equipment...................................................................................................... 11

Antenna Isolation................................................................................................... 11

Procedure for Measuring Antenna Isolation ..........................................................11

Increase isolation or decrease gain?.....................................................................12

Normal Operation ..................................................................................................13

LED Status Indicators............................................................................................13

Front Panel LED’s................................................................................................ 13

Module LED’s ......................................................................................................13

OLC Light Bars .................................................................................................... 15

Front Panel Controls & the LCD Display................................................................ 15

LCD Screen ....................................................................................................... 15

Configuration Settings ........................................................................................... 15

Restore Orig Configuration................................................................................. 15

Calibrate Currents ..............................................................................................15

Set Gain ....................................................................................................... 15

Set Output Level .................................................................................................16

Change Gain Configuration ................................................................................16

Detailed Status Screens ........................................................................................ 16

Amplifiers ....................................................................................................... 16

Power Supply...................................................................................................... 16

OLC ....................................................................................................... 16

OLC Datalog....................................................................................................... 16

Alarms ....................................................................................................... 17

LED Indicators ....................................................................................................... 17

Form-C contacts .................................................................................................... 18

Performance Survey.............................................................................................. 18

Maintenance and Repair ....................................................................................... 19

Power Amplifier Replacement................................................................................ 19

Module Replacement.............................................................................................20

Display/User Interface Replacement ..................................................................... 21

Power Supply Replacement................................................................................... 21

Duplexer / Filter Replacement ............................................................................... 21

Card Cage Replacement ....................................................................................... 22

Recommended Spares.......................................................................................... 22

61-65-50 UserMan page 6 of 24

Manual 7-9415-1.4 08/31/06

Table of Contents

Figures and Tables

Figure 1 Front internal cabinet view 8

Figure 2 Cabinet mounting hole layout 9

Figure 3 AC power entry 10

Figure 4 Measuring antenna isolation 12

Figure 5 Boot-up display 13

Figure 6 Operational status display 13

Figure 7 Menu System 14

Figure 8 Measuring Booster Gain 17

Figure 9 Performance Survey 18

Figure 10 Removing the Power Amplifier (1 of 3) 19

Figure 11 Removing the Power Amplifier (2 of 3) 20

Figure 12 Removing the Power Amplifier (3 of 3) 20

Figure 13 Disconnecting Display/User Interface 22

Table 1 Part Number Designations 7

Specifications 23

Celsius to Fahrenheit Conversions 24

Manual 7-9415-1.4 Page 7TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 7 of 24

GENERAL DESCRIPTION

Signal boosters extend radio coverage into areas

where abrupt propagation losses prevent reliable

communication. This system receives an RF sig-

nal, raises its power level, and couples it to an

antenna or leaky (radiating) coaxial cable system

so that it can be re-radiated. No frequency transla-

tion (conversion) occurs with this device. The two-

way signal booster 61-65-50-XXX-XX is a broad-

band, bidirectional, dual branch (uplink and down-

link) system available in 5.0 MHz passbands. The

booster passes uplink and downlink signals from

406 to 430 MHz. The booster is available in a vari-

ety of configurations as listed in Table 1. A front

view of the booster is shown in Figure 1.

Linear RF active amplifiers, filters, and DC power

sources are used to adequately boost and re-radi-

ate the passband signals. Amplifier stages used in

this signal booster system may be damaged by

excessively strong input signal levels. To minimize

this the system is equipped with Output Leveling

Circuitry (OLC) to protect the amplifiers and reduce

spurious signals.

The system can be ordered in one of three maxi-

mum gain configurations including Full 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 level and mid level

slots. The maximum gain of the uplink or downlink

branch is adjustable and can be setup indepen-

dently. In addition, the gain of each branch can be

reduced up to 30 dB in 0.5 dB increments via soft-

ware interface.

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 in excess of 205 pounds so use

enough people 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

61 - 65 - 50 - A5.0 - G1 (Example)

TYPE FREQUENCY

BAND

FAMILY COARSE

GAIN

BANDWIDTH ENCLOSURE

TYPE

61 = 2 Way 65 = 406 - 430 50 = Signal

Booster

A =

B =

C =

80 dB

60 dB

45 dB

5.0 = 5 MHz G1 =

G2 =

RM =

Painted, Nema4

Stainless, Nema4X

Rack Mount

Note: Gain of 80 dB Model set to 50 dB at Factory. Please measure antenna isolation before resetting.

Table 1: Model number designations for 61-65-50.

GAI

Manual 7-9415-1.4 Page 8TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 8 of 24

Uplink L/L Card (full gain model)

Uplink 1/2G Card (mid gain model)

Uplink M/L Card low gain model)

Downlink L/L Card (full gain model)

Downlink 1/2G Card (mid gain model)

Downlink M/L Card (low gain model)

Downlink L/L Card (full gain model)

Downlink L/G Card (mid gain model)

Downlink Atten Card (low gain model)

Uplink L/G Card (full gain model)

Uplink L/G

Card (mid

Spare (unused slot)

Uplink

Power

Dist

Downlink

Power

Dist

Comm-Card

(optional)

Controller

Card

Downlink

Power

Amplifier

Downlink

Power

Amplifier

Isolator Isolator

Sampler

Filters

part of

Duplexer

Filters

part of

Duplexer

Power

Supply

Sampler

A/C Line

Filter

Ground

Cable to

Cabinet

Door

Status LED’s

Select

Buttons

OLC Light

Bars

Form-C

Contacts

AC Power

Switch

Battery

Backup

Switch

Connect Backup

Battery here

Downlink In

Uplink Out

to donor

antenna

Uplink In

Downlink Out

to in-building

distribution

AC Power

Entry

Battery Backup

Entry

Figure 1: Front view of SB II. 61-65-50-A5.0-G1 shown as example.

Manual 7-9415-1.4 Page 9TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 9 of 24

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.

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 2 shows mounting hole dimensions and

layout 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

preferred 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-

MOUNTING TABS

DOOR

CLAMPS

0.433" DIA.

(11mm)

0.433" DIA.

(11mm)

SIDE VIEW

24.0" (610mm)

18" (458mm)

37.25" (946mm)

31.26" (794mm)

Figure 2: SB II cabinet mounting hole layout.

Manual 7-9415-1.4 Page 10TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 10 of 24

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.

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-

ure 3). An AC line filter is provided for this purpose.

There is a hole provided in the cabinet bottom-wall

for bringing in the AC line. Fasten quick connect

plugs to each wire of the incoming AC line, then

connect the ground wire, neutral wire, and hot wire

to the respective pins on the top of the AC line filter

assembly. The output of the AC line filter is wired

into the switch box which also contains a dual con-

venience outlet for running test equipment. Use

conduit for running the AC line into the SB II cabi-

net and use #14 gauge or larger conductors.

Backup DC Power

SB II may be run on a DC power source that can

supply 24 to 27 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.

Figure 3: Wiring of AC line entry.

Connect Incoming

AC Line here

Manual 7-9415-1.4 Page 11TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 11 of 24

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-

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.

Note: The 80 dB gain models are fac-

tory preset to 50 dB gain and should

only be reset to a higher value after

determining the safe maximum gain

based on antenna isolation

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 the signal boost-

ers passbands.

2) Set the spectrum analyzer for the same center

frequency and a sweep width equal to or just

slightly greater than the passband 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.

NOTE

Manual 7-9415-1.4 Page 12TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 12 of 24

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 booster’s 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.

Repeat the isolation measurements at the other

passband in bi-directional systems and use the

lesser of the two values to determine the maximum

gain setting.

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 14.

3) Repeat step 2 for the downlink path.

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.

Manual 7-9415-1.4 Page 13TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 13 of 24

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).

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, Mid-Level, and Half-Gain Low-

Level amplifier cards have tri-color (green-orange-

red) status LEDs visible 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, Half-Gain Low Level

Module: Green indicates current or device temper-

ature within the expected operating range. Orange

indicates current 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 tempera-

ture and booster operation is likely to be affected.

See page 17 for more details about alarm opera-

tion.

WARNING

Figure 6: Normal Operational LCD Display.

Figure 5: Software version is displayed briefly

during the boot-up sequence.

Manual 7-9415-1.4 Page 14TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 14 of 24

GAIN

## dB

OUT LVL

## 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

Avg

# dB

# %

Day

# dB

# %

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?

Yes No

Uplink

## dBm

Downlink

## dBm

Done

Set Output Levels

UL >

DL >

_ _ _ _ Gain ## dB

Done

Change Gain Config

Are you sure

you want to restore

the Factory Presets?

Yes No

Press Enter to

Calibrate Currents

Calibrating . . .

Done Calibrating

Press Enter to Save

Press ENTER key

KEY

SBII USER MENU 1 (8-20460B)

Press Item Select arrow key

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

Manual 7-9415-1.4 Page 15TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 15 of 24

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 15 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

display which does require a button press to exit.

The main status display shows the uplink and

downlink gain in dB as well as the uplink and down-

link output level in dBm.

The last line of the main status display gives a

summary status message for the entire signal

booster. In this example “Status OK” is being dis-

played. Pressing the “ENTER” button will move

you from the main status display into the menu

selections and will permit interaction with the sys-

tem. There are two main functions available within

the software menus including configuration set-

tings and detailed status displays.

Configuration Settings

In most cases, the factory default settings are the

optimum values for adjustable parameters. The

most common setting to be changed by the sys-

tem’s technician is the gain setting. This is normally

done to compensate for varying values of antenna

isolation as outlined earlier in this manual or to

reduce excessive OLC action resulting from exces-

sive gain.

Please thoroughly study this section before making

any adjustments to the configuration values. Each

configured item is discussed in detail.

Note: Changes to configuration set-

tings do not take affect until the Main

Status screen is re-enabled. This

occurs automatically after 2 minutes

without button input or manually by

pressing the Enter/Done/Cancel buttons to return

to the status screen.

RESTORE ORIG CONFIG

This command will restore all configured settings to

their original factory default values. SB II ships from

the factory preset to the lowest gain possible.

CALIBRATE CURRENTS

Use this command when replacing an RF amplifier.

This function automatically calibrates the current

alarm “trip” point of each amplifier in the system.

Due to manufacturing tolerances there are small

differences in current draw between amplifier

assemblies. This software function matches the

alarm sensing circuit to the respective amplifier

assembly and should be repeated whenever an

amplifier assembly is replaced.

SET GAIN

This function allows the user to electronically set

the gain of the booster in 0.5 dB increments over a

range of 30 dB. Gain can be adjusted indepen-

dently for both the uplink and downlink channels

but in most cases both uplink and downlink should

be set to the same gain value.

Know your antenna isolation before making this

adjustment. We recommend that you temporarily

disconnect both the uplink and downlink antennas

when setting the gain to avoid the possibility of

causing the unit to oscillate. After changing the set-

ting, power the unit down, reconnect the antennas

and power-up the booster.

NOTE

Manual 7-9415-1.4 Page 16TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 16 of 24

Note: A reduction in system gain will

also result in an equal reduction in the

OLC dynamic range, refer to the sec-

tion titled “OLC” on page 16.

SET OUTPUT LEVEL

Allows the output power for the uplink and downlink

channels to be independently adjusted in 0.5 dB

increments up to +31 dBm. Note that the OLC cir-

cuitry will maintain the systems output level at the

values you have selected in this menu.

Use this function ONLY if your system is causing

some form of interference to another radio system.

You can only reduce the booster’s output power

with this command.

CHANGE GAIN CONFIGURATION

Insures proper gain readings when changing basic

booster gain by changing the type of plug-in card

assemblies.

Use of this menu is ONLY needed when converting

your stock SB II to a different gain level by chang-

ing the half-gain low level, low level, mid-level plug-

in amplifier card or by the addition of an attenuator

card. The addition of these cards will change the

unit to another model, see table 1. Don’t confuse

this with simple amplifier bypassing to reduce gain.

Uplink and downlink can be set independently.

Choices for gain are Full, Mid or Low and the

ENTER key toggles the gain setting. The corre-

sponding gain level is displayed. Select DONE

using the arrow keys and press ENTER to return to

the menu. Use the CANCEL button to return to the

Status Display.

Detailed Status Screens

These items allow a detailed examination of sys-

tem components including; all amplifiers (current

draw and temperature), the power supply (voltage

level), and the OLC function (present status and

historical archive). Each item is discussed below in

detail.

AMPLIFIERS

A separate status screen is available for each

amplifier in the system. When an amplifier is

selected this function will display the present cur-

rent draw of that amp as well as its present operat-

ing temperature in degrees Celsius. In addition, a

status message will indicate if the amplifier is con-

nected and whether the amplifier is bypassed or

not bypassed. This menu selection also provides

the option of placing an amplifier in bypass or tak-

ing an amplifier out of bypass.

The current draw will be blank if an amplifier is not

connected, will display BYP if the amplifier is

bypassed, and will display ATTEN if an attenuator

card is being used in place of the amplifier card.

The power amplifier currents will nor-

mally fluctuate up to 850 ma when sig-

nals are present.

POWER SUPPLY

This function displays the real time power supply

voltages for both 24 volt and 12 volt supplies.

OLC

This screen shows the amount of attenuation pres-

ently being used by the OLC for both the uplink and

downlink channels. In addition, the percentage of

OLC presently being used is also shown.

The amount of OLC currently being

used in either the uplink or downlink

channels is also indicated by LED bar

graph displays located on the display

panel. Each segment represents 2 to

4 dB of attenuation depending on the gain setting

of the booster. The OLC bars should only be active

occasionally and no more than 3 or 4 segments

briefly lit. Constant light bar activity means the

booster gain needs to be reduced for optimum per-

formance.

The system has 60 dB of OLC

dynamic range. However, the

dynamic range of the OLC is reduced

when the user selectable gain is

reduced. The reduction will be an

equal amount. For instance, if the user selectable

gain is reduced by 20 dB then the OLC dynamic

range will also be reduced by 20 dB.

OLC DATALOG

This screen displays an OLC Datalog which is the

OLC data over the past 100 days for both uplink

and downlink branches of the system. This is a roll-

ing 100 day log with day 101 overlapping day 1 and

so forth. Day zero represents the current day while

NOTE

Manual 7-9415-1.4 Page 17TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 17 of 24

day one represents yesterday and so on. The

logged data is stored in non-volatile memory and

will not be erased when the unit is powered down.

The average OLC attenuation used when the OLC

was active is given both for individual days and

over the entire past 100 days. The percentage of

time the OLC was active is also given for both indi-

vidual days and over the past 100 days. This

archived information will permit the creation of a

user signal profile to facilitate optimum system con-

figuration and performance.

This archive feature will allow you to see if the gain

of the unit is set too high or if there are transient

episodes of strong signals perhaps desensing

other channels being amplified by the booster.

Alarms

The system continuously monitors the current draw

and operating temperature of each amplifier as well

as the voltage level of the +12 and +24 VDC sup-

plies. If any of these parameters exceed normal

operating levels by a factory preset percentage the

system enters an alarm condition. Notification of an

alarm condition is provided by LED indicators and

Form-C contacts available via the alarm terminal

screws.

LED INDICATORS

There are LED indicators for each amplifier in the

system as well as the +12 and +24 VDC power

supply voltages. The LED indicators for the low-

level, mid-level, and half-gain low-level amplifiers

are located on the individual plug-in module. These

are tri-color LED’s with green representing NOR-

MAL operation, orange representing a WARNING

condition, and red indicating a FAULT. A warning

condition occurs when the current draw of the

amplifier exceeds nominal by +/- 20%. Fault condi-

tions occur when the current draw exceeds +/- 30%

or the amplifiers operating temperature exceeds

80° Celsius. The LED for the attenuator card is

green only and indicates DC power applied to the

card.

The LED indicators for the power amplifiers are

located on the display panel next to the menu

select buttons and are dual color LED’s. Green rep-

resents NORMAL operation while red indicates a

FAULT condition. Fault conditions occur when the

current draw exceeds 900 ma or falls below 200

ma. Also, whenever the amplifiers operating tem-

perature exceeds 95° Celsius. The power amplifi-

ers do not have a warning state.

The power supply LED indicators are located on

display panel next to the menu selection buttons

and are also dual color. Green representing normal

Signal

Generator

Zero

Reference

Spectrum

Analyzer

Gain

Sample

Test Port

Figure 8: Measuring signal booster gain.

Manual 7-9415-1.4 Page 18TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 18 of 24

operation and red a fault condition. A fault condition

for the +24 VDC supply occurs whenever the volt-

age potential drops below +16 VDC (30% below

nominal). Likewise, a fault for the +12 VDC supply

occurs when the potential is below +8 VDC (30%

below nominal).

FORM-C CONTACTS

Form-C contacts are available inside the cabinet

next to the power supply assembly, see figure 2.

These screw terminals are intended for connection

to the customers supervisory alarm or data acqui-

sition system. One set of terminals supplies notifi-

cation of any alarm condition occurring and the

second set of contacts indicate the system is oper-

ating on battery backup power.

PERFORMANCE SURVEY

It is a good idea to document the performance of

the system after installation so that a reference

exists for future comparisons. This information can

make troubleshooting an interference problem or

investigation of a complaint about system perfor-

mance much easier. If there are coverage prob-

lems with a system, this survey will usually reveal

them allowing corrective measures to be taken

before the system is put into routine use. The fol-

lowing is an outline of how to do such a survey.

Because the nature of each installation can be

quite different, only a broad outline is given.

1) Measure the gain of the signal booster being

careful not to exceed the maximum input level.

Figure 8 shows this being done using a signal

generator and spectrum analyzer. Record the

measured values for each passband. We rec-

ommend that a 50 ohm load be connected to

the unused RF port on the bottom of the cabinet

during the gain test.

2) The spectrum analyzer is connected to the -30

dB signal sampler port following the final output

amp. This port will allow the observation of the

amplifier output at a considerably reduced out-

put level. This decoupling value (-30 dB) needs

to be added to any measured signal value in

order to arrive at the actual signal level.

3) With a spectrum analyzer connected to the sig-

nal sampler port (see Figure 9), have person-

nel with handheld radios move to several

Boosted

RF Signal

Signal Distribution System

Spectrum

Analyzer

10 dB Pad

Sample

Test Port

Figure 9: Methodology for doing a performance survey of the signal distribution system.

Manual 7-9415-1.4 Page 19TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 19 of 24

predetermined points and key their radios.

Record the level of these signals as observed

on the analyzer and also record the location of

the person transmitting. In this way, a map of

the systems performance can be generated.

4) For signals coming from a fixed antenna or sta-

tion, record the level of all the desired incoming

signals for future reference.

MAINTENANCE AND REPAIR

Signal boosters manufactured by TX RX Systems,

Inc. can perform for years with little maintenance

and repair. However, if the amplifiers are subjected

to excessively high signal levels, power surges or

lightning strikes, failures may occur. The following

procedures may be followed for detecting a mal-

functioning unit or as part of a periodic mainte-

nance program.

1) The heatsink area should be cleared of dust

and debris.

2) Inspect the unit to see that the two power sup-

ply LED DC indicators are lit (remove any dust

or debris that may obscure the LEDs). This will

verify that DC power is flowing properly. Check

all hardware for tightness.

3) Compare system performance to initial perfor-

mance levels measured when the system was

first installed. The lack of signal can be traced to

a malfunctioning amplifier by progressive signal

monitoring from the output (far end) to the input

end of the system noting the area where the

signal returns to normal level. The next amplifier

toward the output end of the system will proba-

bly be the one that failed.

Measure the gain at any convenient frequency

in the working frequency band to verify that the

performance is still within specifications.

Power Amplifier Replacement

The SB II power amplifiers are field replaceable.

Follow the steps listed below in sequential order.

The required tools are a #1 Phillips screwdriver

and a 5/16” open-ended wrench.

Figure 10: Remove 14 mounting screws to detach amplifier assembly from cabinet.

Remove Screws

Remove

Screws

Remove

Screws

Manual 7-9415-1.4 Page 20TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 20 of 24

Note: Power to the SB II cabinet must

be turned OFF during the power

amplifier replacement process.

1) Remove the Phillips screws which hold the

amplifier into place, refer to Figure 10. The nuts

holding the screws are pressed into the cabinet

and will remain in place when the screws are

removed.

2) Slide the amplifier towards the bottom of the

cabinet as far as it will go. This will allow the top

RF connector to clear the opening. Tilt the top

of the amplifier outwards and remove the top

RF cable at the SMA connector using the 5/16”

wrench. See Figure 11.

3) Slide the amplifier assembly towards the top of

the cabinet as far as it will go. This will allow the

bottom RF connector and grey control cable to

clear the opening. Tilt the bottom of the ampli-

fier outwards and remove the bottom RF cable

at the SMA connector and the grey control

cable. To remove the grey cable from the socket

on the amplifier it is necessary to squeeze the

top and bottom of the connector together to

release a hold down tab. When properly

squeezed the grey cable will disconnect easily

from the amplifier. Refer to Figure 12.

4) To replace the amplifier assembly repeat steps

1 through 3 in reverse order. When replacing

the RF cables do not overtighten the SMA con-

nectors. They should be tightened just slightly

more than hand tight or to the specification of 7

in/lbs. The replacement amplifier comes with an

attached gasket which must press up against

the outside of the cabinet firmly and squarely in

order to provide a correct moisture seal.

Module Replacement

The SB II modules are field replaceable. Follow the

steps listed below in sequential order. The required

tools are a #1 Phillips screwdriver. Two thumb

screws hold each module into place.

Note: Power to the SB II cabinet must

be turned OFF during the module

replacement process except for the

amplifier modules which are “HOT”

switchable.

1) Loosen the two thumb screws which hold the

module into place. Phillips screws are incorpo-

rated into the thumbscrews and they may need

to be loosened first.

2) Grasping the two loosened thumb screws pull

the module straight out of the card cage.

3) To install the replacement module place the

module into the guide-rails of the slot and press

NOTE

Figure 12: Slide amplifier towards top of cabinet to

remove lower cables.

Figure 11: Slide amplifier towards bottom of cabi-

net to remove upper cable.

Manual 7-9415-1.4 Page 21TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 21 of 24

down firmly into place. Each type of module is

keyed uniquely to fit in only one slot within the

card cage. Once the card is seated into place

properly tighten the thumb screws.

The SB II low level and mid level amplifier stages

are field replaceable by simply removing the mod-

ule and plugging in a replacement. These modules

are HOT switchable meaning they can be swapped

without powering down the system. RF cables

attached to the modules must be removed (5/16”

wrench) prior to swapping the modules and must

be re-attached after the new module is in place.

when replacing the RF cables do not overtighten

the SMA connectors. They should be tightened just

slightly more than hand tight or to the specification

of 7 in/lbs.

Modules can be swapped between the uplink and

downlink branches for troubleshooting purposes. If

a problem exists in one branch and the problem

moves to the other branch when modules are

swapped around this indicates a defective module.

Note: After an amplifier module is

replaced use the Calibrate Currents

software function to properly set the

amplifiers alarm trip point, see page

15. Due to slight differences in compo-

nent tolerances the trip point must be reset for any

new amplifier assemblies introduced into the sys-

tem.

Display/User Interface Assembly Replacement

The SB II Display/User Interface assembly is field

replaceable. Follow the steps listed below in

sequential order. No tools are required.

Note: Power to the SB II cabinet must

be turned OFF during the display/user

interface replacement process.

1) Loosen the two thumb-nuts which hold the dis-

play/user interface assembly to the card cage.

2) Gently tilt only the top of the assembly up from

the card cage. Keep the bottom of the assembly

in place. The bottom mounting plate (part of the

card cage) has an overhang on it to support the

display/user interface board. If the assembly is

lifted straight out the overhang could possibly

damage the interface circuit board.

3) With the display/user interface board standing

up straight gently move it upwards while lifting it

out about an inch or two. This should allow the

overhang to clear the interface circuit board

without damage.

4) Remove the ribbon cable that connects the dis-

play/user interface assembly to the card cage,

see Figure 13.

5) To replace the display/user interface assembly

repeat steps 1 through 4 in reverse order.

Power Supply Replacement

The SB II power supply assembly is field replace-

able. Follow the steps listed below in sequential

order. The required tools are a #1 Phillips screw-

driver.

1) Turn off AC power at the junction box.

2) Disconnect the 3 conductor cable that brings

AC power to the supply from the junction box.

3) Disconnect the red and black leads from the

power supply that connect to the card cage.

4) Remove the Phillips screws that hold the power

supply mount bracket to the back plate and

remove the assembly from the cabinet.

5) Reverse steps 4 through 2 to install the replace-

ment power supply.

Duplexer / Filter Replacement

The component assemblies of the duplexer are

field replaceable. Follow the steps listed below in

sequential order. The required tools are a #1 Phil-

lips screwdriver with an extended shaft to reach

down far enough into the unit to loosen mounting

screws.

Note: Power to the SB II cabinet must

be turned OFF during the assembly

replacement process.

1) All RF cables attached to the assembly must be

removed.

2) Remove the Phillips screws that hold the

assembly mount brackets to the back plate and

remove the assembly from the cabinet.

NOTE

Manual 7-9415-1.4 Page 22TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 22 of 24

3) Reverse steps 2 and 1 to install the replace-

ment assembly. When replacing the RF cables

do not overtighten the SMA connectors. They

should be tightened just slightly more than hand

tight or to the specification of 7 in/lbs.

Card Cage Replacement

To replace the card cage follow the steps listed

below in sequential order. The required tools are a

#1 Phillips screwdriver with an extended shaft to

reach down far enough into the unit to loosen the

mounting screws.

Note: Power to the SB II cabinet must

be turned OFF during the card cage

replacement process.

1) Disconnect the display/user interface assembly.

2) Disconnect 4 cables at the backplane of the

card cage which are assessable with the dis-

play/user interface board out of the way.

3) Remove the row of Phillips screws which hold

the card cage to the back plate. There is a row

of screws at the top and bottom of the cage.

4) To install a replacement cage perform steps 3

through 1 in reverse order.

RECOMMENDED SPARES

It is recommended that one spare of each of the

following assemblies be kept on hand for emer-

gency repair purposes; Power Supply 8-20667,

Uplink/Downlink Power Amplifier 3-20807, Mid

Level Amplifier Card 3-19576, Low Level Amplifier

Card 3-19935, Low Gain Amplifier Card 3-20294,

and Half-Gain Low-Level Amplifier Card 3-21035,

Attenuator Card 3-20208, Power Distribution Card

3-19833, Controller Card 3-19832, and the Display/

User Interface Assembly 3-19831.

NOTE

Figure 13: Disconnecting the display/user interface assembly from the card cage.

Disconnect

ribbon cable

here

Manual 7-9415-1.4 Page 23TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 23 of 24

LOW GAIN MODEL MID GAIN MODEL HIGH GAIN MODEL

Maximum Gain: +45 dB +60 dB +80 dB

Gain Adjustment: Programmable attenuation,

0-30 dB, 0.5 dB steps

Programmable attenuation,

0-30 dB, 0.5 dB steps

Programmable attenuation,

0-60 dB, 0.5 dB steps

3rd Order Output Intercept Point: +54 dBm minimum,

with no attenuation

+54 dBm minimum,

with no attenuation

+54 dBm minimum,

with no attenuation

RF Sampler: PA Output sampler ports

(-30 dB)

PA Output sampler ports

(-30 dB)

PA Output sampler ports

(-30 dB)

Noise Figure (without attenuation): 5.0 dB maximum 3.0 dB maximum 3.0 dB maximum,

Operating Temperature Range: -30°C to +50° C -30°C to +50° C -30°C to +50° C

Nominal Impedance: 50 ohms, <1.5:1 VSWR 50 ohms, <1.5:1 VSWR 50 ohms, <1.5:1 VSWR

Input/Output Connectors: N female N female N female

RF Sampler Connectors: BNC female BNC female BNC female

AC Power Input: 100-240 VAC; 50-60 Hz 100-240 VAC; 50-60 Hz 100-240 VAC; 50-60 Hz

DC Input Voltage: +24 to +27 VDC +24 to +27 VDC +24 to +27 VDC

Unit Power Consumption (AC/DC): <150 VA <150 VA <150 VA

Housing: NEMA 4, NEMA 4X

Rack Mount

NEMA 4, NEMA 4X

Rack Mount

NEMA 4, NEMA 4X

Rack Mount

Nominal Size: 39" x 32" x 14" (5 MHz BW)

30" x 24" x 12" (800 KHz BW)

39" x 32" x 14" (5 MHz BW)

30" x 24" x 12" (800 KHz BW)

39" x 32" x 14" (5 MHz BW)

30" x 24" x 12" (800 KHz BW)

Net Weight: < 205 lbs. < 205 lbs. < 205 lbs.

Manual 7-9415-1.4 Page 24TX RX Systems Inc. 08/31/06

61-65-50 UserMan page 24 of 24

CELCIUS FARENHEIT

105 221.0

104 219.2

103 217.4

102 215.6

101 213.8

100 212.0

99 210.2

98 208.4

97 206.6

96 204.8

95 203.0

94 201.2

93 199.4

92 197.6

91 195.8

90 194.0

89 192.2

88 190.4

87 188.6

86 186.8

85 185.0

84 183.2

83 181.4

82 179.6

81 177.8

80 176.0

79 174.2

78 172.4

77 170.6

76 168.8

75 167.0

74 165.2

73 163.4

72 161.6

71 159.8

70 158.0

69 156.2

68 154.4

67 152.6

66 150.8

65 149.0

64 147.2

63 145.4

62 143.6

61 141.8

60 140.0

59 138.2

58 136.4

57 134.6

56 132.8

55 131.0

54 129.2

53 127.4

52 125.6

51 123.8

50 122.0

49 120.2

48 118.4

47 116.6

46 114.8

45 113.0

44 111.2

43 109.4

42 107.6

41 105.8

40 104.0

39 102.2

38 100.4

37 98.6

36 96.8

35 95.0

34 93.2

33 91.4

32 89.6

31 87.8

30 86.0

29 84.2

28 82.4

CELCIUS FARENHEIT

27 80.6

26 78.8

25 77.0

24 75.2

23 73.4

22 71.6

21 69.8

20 68.0

19 66.2

18 64.4

17 62.6

16 60.8

15 59.0

14 57.2

13 55.4

12 53.6

11 51.8

10 50.0

948.2

846.4

744.6

642.8

541.0

439.2

337.4

235.6

133.8

032.0

-1 30.2

-2 28.4

-3 26.6

-4 24.8

-5 23.0

-6 21.2

-7 19.4

-8 17.6

-9 15.8

-10 14.0

-11 12.2

CELCIUS FARENHEIT

-12 10.4

-13 8.6

-14 6.8

-15 5.0

-16 3.2

-17 1.4

-18 -0.4

-19 -2.2

-20 -4.0

-21 -5.8

-22 -7.6

-23 -9.4

-24 -11.2

-25 -13.0

-26 -14.8

-27 -16.6

-28 -18.4

-29 -20.2

-30 -22.0

-31 -23.8

-32 -25.6

-33 -27.4

-34 -29.2

-35 -31.0

-36 -32.8

-37 -34.6

-38 -36.4

-39 -38.2

-40 -40.0

-41 -41.8

-42 -43.6

-43 -45.4

-44 -47.2

-45 -49.0

-46 -50.8

-47 -52.6

-48 -54.4

-49 -56.2

-50 -58.0

CELCIUS FARENHEIT

CELSIUS TO FAHRENHEIT CONVERSION TABLE

Bird Technologies Group 5PI616550 SIGNAL BOOSTER II (SB II) User Manual 9415cvr 1 4

Bird Technologies Group SIGNAL BOOSTER II (SB II) 9415cvr 1 4

USERS MANUAL

Navigation menu

Namespaces

Views

Navigation