COMPANY LIABILITY The information in this manual has been carefully compiled and checked for technical accuracy. Multitone Electronics plc accept no liability for inaccuracies or errors. In line with the company policy of technical advancement, the information within this document may be changed.
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BSR 113 CONTENTS Page (I) Title Page Page (ii) Company Liability Page (iii) Contents Page (iv) Effective Page List Page (v) Safety Summary Warning Page (vi) Cautions Section 1 Introduction and Specification Section 2 Operating Instructions Section 3 Technical Description...
BSR 113 SAFETY SUMMARY The following information applies to both operating and servicing personnel. General Warnings and Cautions will be found throughout the manual where they apply. WARNING statements identify conditions or practices that could result in personal injury or loss of life.
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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.
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. Page 1 - 2...
BSR 113 SPECIFICATIONS Performance Characteristics The performance characteristics of the BSR 113 are as follows: a) Frequency Range: 448.0 - 449.0MHz b) Suggested Frequencies: 448.1250MHz 448.1500MHz 448.2250MHz 448.3500MHz 448.6750MHz c) Channel Spacing: 25kHz d) Intermediate Frequencies: 1st: 45MHz 2nd: 455kHz e) Crystal Frequency (1st LO): ƒx = ƒc - 45MHz...
Radiated Power to Antenna: <2nW s) Cabinet Radiation: <2nW t) Signal Detect Relay Contact Rating: 100V DC, 250mA, non-inductive Power Supply The power supply requirements of the BSR 113 are as follows: a) Power Supply: 12V DC b) Current Consumption: <400mA maximum Connectors...
BSR 113 Operational Environment The environmental characteristics of the BSR 113 are as follows: -25 C to +55 C a) Operational Temperature Range: b) Humidity: Up to 95% Relative Humidity over the operational temperature range c) Stability: ±6ppm over the operational temperature...
CONTENTS: OPERATION _______________________ OPERATION The BSR 113 is automatic in operation, with the exception of the following: Switching on the power supply. Setting the volume control (located at the rear of the unit) to a suitable level. TM1194A Issue B...
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BSR 113 SECTION 3 TECHNICAL DESCRIPTION CONTENTS: INTRODUCTION RADIO CIRCUITRY Signal Input and Isolation RF Amplifier and Filters First Local Oscillator First Mixer Second Local Oscillator and Mixer Second IF Stage Audio Splitting RX AUDIO PATH 10. Filtering and Amplification 11.
FIGURE Functional Block Diagram _______________________ INTRODUCTION This section provides a technical description of the BSR 113 circuit operation. Reference should be made to the functional block diagram (Figure 1) and the circuit diagrams in Section 7. RADIO CIRCUITRY Signal Input and Isolation...
BSR 113 First Mixer The first mixer comprises TR6 and associated components. The injection frequency from the first local oscillator is fed to the first mixer via the helical filter FL7 and inductor L9. The RF signal is input via the inductor L13. The difference signal of 45MHz is selected by the collector load of L12, R18 and C29.
BSR 113 RX AUDIO PATH Filtering and Amplification 10. The audio signal is de-emphasised by R339 and C104 to produce the test and tune up signal Audio X (available at the internal test socket SK5 pin 2). It also passes through two stages of high pass filtering and two stages of low pass filtering, provided by IC11 (pin 8) and IC11 (pin 14), to become the Rx Audio signal.
BSR 113 NOISE SQUELCH PATH Filtering and Amplification 15. The audio signal from IC1 (pin 14) is de-emphasised by R365 and C154. It is then filtered by the active filter stages TR41 and TR44 to pass only frequencies above approximately 6kHz. These stages give approximately 60dBs of rejection of low frequency audio relative to the high audio frequencies used by the squelch circuitry.
BSR 113 Table 1: Noise Squelch Signal Levels LEVEL SIGNAL NOT RECEIVED RECEIVED Signal Indication and Noise Squelch Defeat 21. When the collector of TR49 goes high TR27 is turned on allowing current to flow through the LED D11, thus providing a receive signal indication. The collector of TR49 can also be held permanently high by fitting LK1, providing a noise Squelch defeat facility.
BSR 113 27. The output of IC8 (pin 7) is passed to the line termination loading and safety barrier circuitry provided by components R98, R99, R100, R101, R102, R103, C239, C240, C241, CS3 and T3. The Tone Out signal then proceeds to the external line connection via SK2 (pins 1 and 8).
BSR 113 31. The tone frequency is calculated as follows: Tone Frequency (Hz) = 2.8 x C285 x (R163 + RV5 + Rt) where Rt = R165 or, R164 and R165 (refer to Table 2). Sub-Audio Tone Indication and Disable 32.
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BSR 113 POWER SUPPLIES +12 Supply 36. The +12V regulated input voltage from the Power Supply Unit (PSU) is fed into the BSR via SK3 and FS1. It is then passed to the voltage regulators. +10V Regulator 37. Voltage regulator IC4 converts its +12V regulated input to +10V, which is then passed to the rest of the circuitry.
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_______________________ GENERAL This section details the installation and commissioning procedures for the BSR 113. Refer to Figure 5 for the BSR 113 socket positions and Table 3 for the pin descriptions of each socket. TM1194A Issue B Page 4 - 1...
COMPONENTS SHOULD BE STORED IN ANTI-STATIC PACKAGING WHEN NOT INSTALLED IN THE EQUIPMENT. Shelf Mounting The base of the BSR 113 is fitted with four rubber feet that provide a non-slip grip on a flat surface suitable for shelf mounting. Wall Mounting To wall mount the BSR 113 proceed as follows: a) Referring to Figure 1, mark, drill and plug the four fixing holes.
Figure 1: Wall Mounting Hole Positions Power Supply Connection The BSR 113 must be fitted with the 12V DC 640mA Power Supply Unit (PSU), Part No. 6601-0011 (UK) or Part No. 6603-0003 (Europe). No other PSUs are acceptable for use.
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P317s can be connected to a system, giving a maximum of 16 BSRs. Remove LK14 to select Voting operation. Refer to Table 1. If the system requires more than one BSR 113, connect SK2 of each BSR 113 to a P317 Voting Unit using an 8-way modular plug (FCC68 type) double ended cable (Part No.
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P317 VOTING UNIT VOTING UNIT BSR 113 AUDIO+ TONE CONTROL CONTROL UNIT UNIT BSR 113 AUDIO BSR 113 SYSTEM RECEIVERS ACCESS 1000 5 TO 8 ACCESS 3000 Figure 3: Multiple BSR 113 Configuration TM1194A Issue B Page 4 - 5...
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BSR 113 Table 1: Summary of Link Settings LINK POSITION EFFECT IN * NOISE SQUELCH DEFEATED NOISE SQUELCH ACTIVE IN * LINE OUT GATED BY SQUELCH LINE OUT CONTINUOUSLY ENABLED SUB-AUDIO TONE DISABLED OUT * SUB-AUDIO TONE ENABLED RX AUDIO HIGH PASS FILTER STAGE BYPASSED...
Public Telephone Operator (PTO). This allows the audio signals to be passed from a remote BSR 113 to the local system via the external lines. The system must be connected to the PTO lines via a P317 Voting Unit.
BSR 113 10. The Line Out and Tone Out signals each require a PTO line to be connected to the appropriate pins of socket SK2. Alternatively, the Tone Out signal can be combined with the Line Out signal by the fitting of link LK10. This allows both signals to be fed from the Line Out pins (4 and 6) to one PTO line instead of two.
BSR 113 COMMISSIONING 14. The BSR 113 requires no commissioning other than switching on the PSU and setting the volume control (RV4), located at the rear of the unit, to the required level. REAR VIEW SQUELCH RELAY AUDIO OUT DC INPUT...
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BSR 113 VIEWED FROM CLIP ON OTHER SIDE NON-CLIP SIDE TAG/10493/1 Figure 6: 8-Way Modular Plug (FCC68 Type) Pin Configuration Page 4 - 10 TM1194A Issue B...
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BSR 113 SECTION 5 SERVICING CONTENTS: ROUTINE MAINTENANCE SERVICE POLICY WORKSHOP PROVISIONS TEST EQUIPMENT, TOOLS AND ANCILLARIES Test Equipment Tools and Ancillaries SERVICING Removal and Replacement of Receiver Cover PCB Removal and Replacement ALIGNMENT PROCEDURES Receiver and Noise Squelch Alignment 10.
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Routine maintenance is limited to surface cleaning of the receiver using a lint-free cloth moistened with soap-free water. SERVICE POLICY The service policy for the BSR 113 is to repair the equipment to component level. Repairs are only to be performed by qualified personnel in authorised workshops. WORKSHOP PROVISIONS Repair workshops must be free from hostile radio interference or otherwise equipped with Faraday cages.
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Frequency Counter (capable of measuring between 100Hz and 350Hz) SINAD Meter (with loudspeaker) Oscilloscope 12V DC Power Supply (Multitone Part No. 6601-0011 or 6603-0003) Multimeter Tools and Ancillaries The following tools and ancillaries are required to carry out the servicing...
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PCB. Replacement is the reverse of the removal procedure. ALIGNMENT PROCEDURES Perform the alignment procedures for the BSR 113 in the same order as shown. Check the +10V and +5V power supplies before proceeding. The +5V power supply is also indicated by the illumination of LED D23.
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BSR 113 Receiver and Noise Squelch Alignment To carry out the receiver alignment procedure configure the equipment as shown in Figure 1 and proceed as follows: SIGNAL GENERATOR RF O/P MOD I/P 1kHz from SINAD METER CABLE SK5-2 SINAD METER...
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BSR 113 g) FL7: Adjust the first slug of FL7 for best SINAD. Ensure that the best tuning point is found by first adjusting the slug from one extreme of travel to the other. Reduce the RF level from the signal generator to maintain about 12dB SINAD.
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BSR 113 FL10: Adjust the first slug of FL10 for best SINAD. Ensure that the best tuning point is found by first adjusting the slug from one extreme of travel to the other. Reduce the RF level from the signal generator to maintain about 12dB SINAD.
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BSR 113 Sub-Audio Tone Alignment 10. To carry out the Sub-Audio tone alignment configure the equipment as shown in Figure 2 and proceed as follows: SIGNAL GENERATOR RF O/P CABLE SK5-8 FREQUENCY BSR 113 COUNTER SK5-1 TAG/10925/1 Figure 2: Sub-Audio Tone Alignment Test Equipment a) Check the audio path to confirm that it is operational by inserting links LK3 (Tone Disable) and LK1 (noise Squelch defeat).
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BSR 113 Signal Strength Tone Alignment 11. To carry out the Signal Strength Tone alignment configure the equipment as shown in Figure 3 and proceed as follows: SIGNAL GENERATOR RF O/P Cable FREQUENCY COUNTER BSR 113 OSCILLOSCOPE CS3 or CS4...
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BSR 113 Line Out Level Alignment 12. To carry out alignment of the output level of the Line Out signal, leave the equipment configured as shown in Figure 3 and proceed as follows: a) With the signal generator connected to SK7 apply a signal of -90dBm at the on-channel frequency modulated with 1kHz at a deviation of 3kHz.
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BSR 113 IF1 IN IF1 DE-COUPLE PNP BASE 1V POT IF1 DE-COUPLE IF1 OUT DATA OUT IF2 IN IF2 DE-COUPLE DATA IN IF2 DE-COUPLE DISCRIMINATOR OUT QUADRATURE LC IN IF2 OUT Not Connected Not Connected Not Connected Not Connected TRIGGER...
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BSR113 BSR113 BASE STATION RECEIVER BASE STATION RECEIVER TM1194A TM1194A BSR113 BSR113 BASE STATION RECEIVER BASE STATION RECEIVER TM1194A TM1194A BSR113 BSR113 BASE STATION RECEIVER BASE STATION RECEIVER TM1194A TM1194A BSR113 BSR113 BASE STATION RECEIVER BASE STATION RECEIVER TM1194A TM1194A BSR113 BSR113 BASE STATION RECEIVER...
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BSR113 BSR113 BSR113 BASE STATION RECEIVER BASE STATION RECEIVER BASE STATION RECEIVER TM1194A TM1194A TM1194A BSR113 BSR113 BSR113 BASE STATION RECEIVER BASE STATION RECEIVER BASE STATION RECEIVER TM1194A TM1194A TM1194A BSR113 BSR113 BSR113 BASE STATION RECEIVER BASE STATION RECEIVER BASE STATION RECEIVER TM1194A TM1194A TM1194A...
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