Multitone BSR 113 User manual

BSR 113
TM1194A Issue B Page (i)
TECHNICAL MANUAL
for
UHF BASE STATION RECEIVER
MODEL BSR 113
(448MHz)
Printed and published in England

BSR 113
TM1194A Issue BPage (ii)
COMPANY LIABILITY
The information in this manual has been carefull
y
compiled and checked for technical
accurac
y
. Multitone Electronics plc accept no liabilit
y
for inaccuracies or errors. In line
with the compan
y
polic
y
of technical advancement, the information within this document
ma
y
be chan
g
ed. The user should ensure that the correct issue of the document is
used. Comments or correspondence re
g
ardin
g
this manual should be addressed to:
Multitone Electronics plc
Technical Publications
Kimbell Road
Basin
g
stoke
Hampshire
RG22 4AD
En
g
land
ISSUE DATE
B February 1998
© Multitone Electronics plc 1996, 1998

BSR 113
TM1194A Issue B Page (iii)
CONTENTS
Pa
g
e
(
I
)
Title Pa
g
e
Pa
g
e
(
ii
)
Compan
y
Liabilit
y
Pa
g
e
(
iii
)
Contents
Pa
g
e
(
iv
)
Effective Pa
g
e List
Pa
g
e
(
v
)
Safet
y
Summar
y
Warnin
g
Pa
g
e
(
vi
)
Cautions
Section 1 Introduction and Specification
Section 2 Operatin
g
Instructions
Section 3 Technical Description
Section 4 Installation and Commissionin
g
Section 5 Servicin
g
Section 6 Spare Parts List
Section 7 Dia
g
rams

BSR 113
TM1194A Issue BPage (iv)
EFFECTIVE PAGE LIST
Page No. Issue Page No. Issue Page No. Issue
(
I
)
B3-7B5-7B
(
ii
)
B3-8B5-8B
(
iii
)
B3-9B5-9B
(
iv
)
B 3-10 B 5-10 B
(
v
)
B4-1B5-11B
(
vi
)
B4-2B5-12B
1-1 B 4-3 B 5-13 B
1-2 B 4-4 B 5-14 B
1-3 B 4-5 B 6-1 B
1-4 B 4-6 B 6-2 B
1-5 B 4-7 B 6-3 B
1-6 B 4-8 B 6-4 B
2-1 B 4-9 B 6-5 B
2-2 B 4-10 B 6-6 B
3-1 B 5-1 B 7-1 B
3-2 B 5-2 B 7-2 B
3-3 B 5-3 B 7-3/4 B
3-4 B 5-4 B 7-5/6 B
3-5 B 5-5 B 7-7/8 B
3-6 B 5-6 B 7-9/10 B
7-11 B

BSR 113
TM1194A Issue B Page (v)
MANY RESINS AND OTHER CHEMICALS USED IN THE MANUFACTURE OF
ELECTRICAL COMPONENTS FITTED TO THIS BOARD GIVE OFF TOXIC FUMES
WHEN INCINERATED. APPROPRIATE PRECAUTIONS SHOULD THEREFORE BE
TAKEN WHEN DISPOSING OF THESE ITEMS.
SAFETY SUMMARY
The followin
g
information applies to both operatin
g
and servicin
g
personnel. General
Warnin
g
s and Cautions will be found throu
g
hout the manual where the
y
appl
y
.
WARNING statements identif
y
conditions or practices that could result in personal in
j
ur
y
or loss of life.
CAUTION statements identif
y
conditions or practices that could result in e
q
uipment
dama
g
e.
WARNING

BSR 113
TM1194A Issue BPage (vi)
CAUTIONS
DO NOT INSTALL THE RECEIVER WHERE IT MAY BE EXPOSED TO LIQUIDS,
STRONG MAGNETIC FIELDS, EXTREME TEMPERATURES OR STRONG SUNLIGHT.
STATIC SENSITIVE DEVICES ARE USED WITHIN THIS EQUIPMENT. CARE MUST
BE TAKEN TO ENSURE DAMAGE TO THESE DEVICES IS NOT CAUSED BY HIGH
LEVELS OF STATIC ELECTRICITY. SPARE BOARDS OR COMPONENTS SHOULD BE
STORED IN ANTI-STATIC PACKAGING WHEN NOT INSTALLED IN THE EQUIPMENT.
DIRECT CONNECTION OF THE BSR 113 TO PUBLIC TELEPHONE OPERATOR
(
PTO
)
LINES IS PROHIBITED UNLESS NATIONAL LINE CONNECTION APPROVAL HAS BEEN
GRANTED BY THE APPROPRIATE REGULATORY AUTHORITY.
UNDER NO CIRCUMSTANCES SHOULD SK1 BE CONNECTED TO THE SYSTEM BUS
OF MULTITONE ACCESS 1000 OR ACCESS 3000 SYSTEMS.

BSR 113
TM1194A Issue B Page 1 - 1
SECTION 1
INTRODUCTION AND SPECIFICATION
CONTENTS:
1. INTRODUCTION
2. FEATURES
3. PHYSICAL CONSTRUCTION
SPECIFICATIONS
4. Performance Characteristics
5. Power Supply
6. Connectors
7. Physical Characteristics
8. Operational Environment
FIGURE Page
1. Simplified BSR Configuration 1-2
_______________________
INTRODUCTION
1. The Base Station Receiver model BSR 113 is an UHF double superheterodyne
frequency modulated receiver, operating on a specified frequency within the range
448MHz to 449MHz. The BSR 113 is suitable for systems providing two-way
speech between a base control unit and mobile transceivers, and for systems
incorporating talkthrough between the mobile transceivers via the base control unit.
A simplified block diagram of a typical BSR 113 configuration is shown in Figure 1.

TRANSCEIVER
RECEIVER
STATION
BASE
TRANSMITTER
CONTROL
SYSTEM
TAG10500-2
(e.
g
. ACCESS 3000)
BSR 113
TM1194A Issue BPage 1 - 2
Figure 1: Simplified BSR Configuration
FEATURES
2. The BSR 113 has the following features:
 Signal detect relay
 600 6 audio line and tone drivers
 Speaker with volume control
 Ability to link with other receivers
PHYSICAL CONSTRUCTION
3. The BSR 113 consists of a single Printed Circuit Board (PCB) mounted in a tough,
moulded plastic outer casing, consisting of a base and a cover. The PCB is
mounted on the base and a loudspeaker is fitted to the cover. Connector sockets
are fitted to a cover plate at the rear of the unit. The speaker volume control is
also located at the rear of the unit. The BSR 113 can be wall or shelf mounted.

BSR 113
TM1194A Issue B Page 1 - 3
SPECIFICATIONS
Performance Characteristics
4. The performance characteristics of the BSR 113 are as follows:
a) Frequency Range: 448.0 - 449.0MHz
b) Suggested Frequencies: 1: 448.1250MHz
2: 448.1500MHz
3: 448.2250MHz
4: 448.3500MHz
5: 448.6750MHz
c) Channel Spacing: 25kHz
d) Intermediate Frequencies: 1st: 45MHz
2nd: 455kHz
e) Crystal Frequency (1st LO): ƒx = ƒc - 45MHz
6
f) Sub-Audio Tone Frequencies: 88.5Hz, 103.5Hz, 114.8Hz, 127.3Hz,
141.3Hz
g) Sub-Audio Tone Squelch: To EIA standard RS-220
h) Full System Deviation: ±5kHz for 20/25kHz channel spacing
j) Sensitivity (conducted): <1µV for 12dB SINAD at 60% of full
system deviation
k) Tone Squelch Sensitivity: <0.7µV at 15% of full system deviation
l) Adjacent Channel Rejection: >70dB Standard (2 signal method)
m) Spurious Response Rejection: >70dB (2 signal method)
n) Intermodulation Response
Rejection: >60dB (3 signal method)
p) Audio Output (Internal
Loudspeaker): 100mW into 8 6

BSR 113
TM1194A Issue BPage 1 - 4
q) Audio Output External Line Level: -13dBm nominal (-4dBm max) to 600 6
(internal, pre-set)
r) Radiated Power to Antenna: <2nW
s) Cabinet Radiation: <2nW
t) Signal Detect Relay Contact Rating: 100V DC, 250mA, non-inductive
Power Supply
5. The power supply requirements of the BSR 113 are as follows:
a) Power Supply: 12V DC
b) Current Consumption: <400mA maximum
Connectors
6. The BSR 113 is fitted with the following connectors:
a) SK2: Audio/Tone Out
b) SK1: Squelch Relay
c) SK3: DC Power Supply
d) SK7: Antenna
Physical Characteristics
7. The physical characteristics of the BSR 113 are as follows:
a) Overall Dimensions: Width: 235mm
Depth: 207mm
Height: 50mm
b) Weight: 0.7kg