BS 6940-1:1989

Foreword
Committees responsible
Specification
Section one. General
1 Scope
2 Terminology
2.1 General terms and definitions
2.1.1 Transmitter
2.1.1.1 Carrier power
2.1.1.2 Effective radiated power (ERP)
2.1.1.3 Maximum permissible frequency (or phase)
         deviation
2.1.2 Receiver
2.1.2.1 Standard signal-to-noise ratio
2.2 T.A.C.S. specific terms and definitions
2.3 T.A.C.S. specific numeric indicators
2.4 T.A.C.S. orders
2.5 Status information on mobile station operation
2.6 Frequently used abbreviations
3 Instructions for use
3.1 General
3.2 Installation instructions
3.3 User handbook
4 Additional requirements for type approval tests
5 Labelling
Section two. Conditions of measurement
6 Standard test conditions
6.1 Normal test conditions
6.1.1 General
6.1.2 Normal temperature and humidity
6.1.3 Normal test power source
6.2 Extreme test conditions
6.2.1 Extreme temperature
6.2.2 Extreme test power source values
6.2.3 Procedure for tests at extreme temperatures
6.3 Normal test modulation
6.4 Artificial antenna
6.5 Control of equipment and interfaces
6.6 Radio frequency output and input signal
         measuring arrangements for equipment with
         integral antenna
6.7 Radio frequency input signal level
6.8 Test frequencies
6.9 Base station simulator
6.10 Acoustic coupling device
6.11 Characteristics of measuring equipment
6.12 Tolerance of measurements
6.13 Receiver volume control
Section three. Radio frequency characteristics
7 Transmitter
7.1 Maximum carrier power
7.2 RF power output control
7.3 Frequency error
7.4 SAT tone peak frequency deviation
7.5 Maximum permissible frequency deviation
7.6 Occupied bandwidth
7.7 Spurious emissions
7.8 Signalling tone peak frequency deviation
7.9 Wideband data peak frequency deviation
8 Receiver
8.1 General
8.2 Maximum usable sensitivity
8.3 Adjacent channel selectivity
8.4 Intermodulation immunity
8.5 Spurious response immunity
8.6 Blocking or desensitization
8.7 Spurious emissions
Section four. Audio frequency characteristics
9 Transmit audio tests
9.1 Send loudness rating (SLR)
9.2 Overall amplitude characteristic
9.3 Compressor attack and decay characteristic
9.4 Modulation distortion
9.5 Overall frequency response
10 Receive audio tests
10.1 Receive loudness rating (RLR)
10.2 Overall amplitude characteristic
10.3 Expander attack and decay characteristics
10.4 Acoustic output level upper limit
10.5 Demodulation distortion
10.6 Signal-to-residual output power ratio
10.7 Overall frequency response
11 Combined transmitter and receiver audio tests
11.1 Masked sidetone loudness rating (STMR)
11.2 Receive to transmit echo loss
11.3 Receive to transmit stability loss
12 Setting of the MS handset volume control
12.1 General
12.2 RLR upper limit
12.3 Receive volume control range
12.4 Change of sidetone loss
Appendices
A The construction of a 10 m radiation test site
A.1 General
A.2 Test site
A.3 Position of the equipment under test
A.4 Test antenna
A.5 Substitution antenna
A.6 Test equipment
A.7 Alternative indoor test site
B Test fixture
C Examples of simple combining networks
D Base station simulator
E Characteristics of the measuring equipment
E.1 Distortion factor and audio frequency level
         meter
E.2 Audio frequency band-rejection filter
         characteristics
E.3 Method for testing the intermodulation
         characteristics of signal generators
E.4 Psophometric filter
E.5 Coupling network
F Tolerance of measurements
G Acoustic measurements
G.1 Acoustic coupling device
G.1.1 General
G.1.2 Artificial mouth
G.1.3 Artificial ear
G.1.4 Mounting apparatus and handset jig
G.2 Acoustic environment
G.3 Guidance on radiation test measurement of audio
         frequency output of a receiver having an
         integral antenna
H Cross-references to BABT/SITS/84/13/A, Issue 1,
         as amended by Amendment No. 8
Tables
1 Mobile station classes
2 Mobile station nominal power levels
3 Parameters required to calculate SLR
4 Deviation arising from acoustic pressure
5 Parameters required to calculate RLR
6 Acoustic pressure arising from peak frequency
         deviation
7 Parameters required to calculate STMR
8 Table of frequencies and frequency deviations
         derived from figure 7
Figures
1 MS receiver equivalent gain versus test tone
         frequency
2 Demodulator output versus peak deviation
3 Expander input/output characteristic
4 Transmit frequency response mask
5 Carrier deviation versus modulating frequency
6 Receive frequency response mask
7 Carrier deviation versus modulating frequency
8 Test site
9 Measuring arrangements for MS radiated
         emissions at 10 m
10 Measuring arrangements for MS receiver
         sensitivity on 10 m test site
11 Indoor site arrangement (shown for horizontal
         polarization)
12 Network for combining two signals
13 Network for combining three signals
14 Typical Base Station Simulator (BSS)
         arrangement
15 Measuring arrangement for isolation of
         transmitter and receiver signal paths

Specifies, in conjunction with Part 2, the performance requirements for mobile stations operating in the Total Access Communication System (sometimes known as the Cellular Radio System).