Tait TEL0061 Paging Transmitter User Manual T857 A4 pages

Tait Limited Paging Transmitter T857 A4 pages

Exciter Specification

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Document ID269944
Application IDqFAf+vY4gC4kwb6bEi8/CQ==
Document DescriptionExciter Specification
Short Term ConfidentialNo
Permanent ConfidentialNo
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Document TypeUser Manual
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Date Submitted2002-09-12 00:00:00
Date Available2002-11-07 00:00:00
Creation Date0000-00-00 00:00:00
Producing SoftwareAcrobat Distiller 3.0 for Windows
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Document TitleT857 A4 pages.pdf

C1.8
T856/857 General Information
1.2
Specifications
1.2.1
Introduction
M850-00
The performance figures given are minimum figures, unless otherwise indicated, for
equipment tuned with the maximum switching range and operating at standard room
temperature (+22°C to +28°C) and standard test voltage (13.8V DC).
Where applicable, the test methods used to obtain the following performance figures
are those described in the EIA and ETS specifications. However, there are several
parameters for which performance according to the CEPT specification is given. Refer
to Section 1.2.6 for details of test standards.
Details of test methods and the conditions which apply for Type Approval testing in all
countries can be obtained from Tait Electronics Ltd.
The terms "wide bandwidth", "mid bandwidth" and "narrow bandwidth" used in this
and following sections are defined in the following table.
Channel Spacing
Modulation
100% Deviation
Receiver
IF Bandwidth
Wide Bandwidth
25kHz
±5.0kHz
15.0kHz
Mid Bandwidth
20kHz
±4.0kHz
12.0kHz
12.5kHz
±2.5kHz
7.5kHz
Narrow Bandwidth
1.2.2
General
Number Of Channels
.. 128 (standard)1
Supply Voltage:
Operating Voltage
Standard Test Voltage
Polarity
Polarity Protection
Line Keying Supply (if required)
..
..
..
..
..
10.8 to 16V DC
13.8V DC
negative earth only
crowbar diode
-50V DC
..
..
..
..
5.5A (typical)
750mA
165mA (typical)
150mA (typical)
Supply Current:
Transmit
Standby
T856
T857
T856
T857
Operating Temperature Range
.. -20°C to +60°C
1. Additional channels may be factory programmed. Contact your nearest Tait Dealer or
Customer Service Organisation.
29/02/00
Copyright TEL
T856/857 General Information
M850-00
C1.9
Dimensions:
Height
Width
Length
.. 183mm
.. 60mm
.. 322mm
Weight
.. 2.1kg
Time-Out Timer (optional)
.. 0 to 5 minutes1 adjustable in 10 second steps
Tail Timer
.. 0 to 5 seconds adjustable in 100ms2
steps
Transmit Key Time
.. <30ms
Transmit Lockout Timer
.. 0 to 1 minute adjustable in 10 second
steps
1.2.3
RF Section
Frequency Range
.. 400-520MHz (refer to Section 1.4 and
Section 1.5)
Modulation Type
.. FM
Frequency Increment
.. 5 or 6.25kHz
Switching Range
.. 8MHz (i.e. ±4MHz from the centre
frequency)
Load Impedance
.. 50 ohms
Frequency Stability
(see also Section 1.4 and Section 1.5)
.. ±1ppm, -20°C to +60°C
Adjacent Channel Power (full deviation):
Wide Bandwidth (WB)
(±25kHz/15kHz B/W)
.. -75dBc
Mid Bandwidth (MB)
(±20kHz/12kHz B/W)
.. -70dBc
Narrow Bandwidth (NB)
(±12.5kHz/7.5kHz B/W)
.. -65dBc
Transmitter Switching
.. complies with ETS 300 113
1. Adjustable from 0 to 10 minutes in PGM800Win version 2.12 and later.
2. Adjustable in 20ms steps in PGM800Win version 2.12 and later.
Copyright TEL
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T856/857 General Information
C1.10
M850-00
Transmitter Side Band Noise:
(no modulation, 15kHz bandwidth)
At ±25kHz
At ±1MHz
Intermodulation
.. -95dBc
.. -105dBc
.. -40dBc with interfering signal of
-30dBc
.. -70dBc with 25dB isolation
& interfering signal of -30dBc
(PA with output isolator)
T856 Mismatch Capability:
Ruggedness
Stability
.. refer to your nearest Tait Dealer or
Customer Service Organisation
.. 3:1 VSWR (all phase angles)
Radiated Spurious Emissions:
Transmit
Standby
.. -36dBm to 1GHz
-30dBm 1GHz to 4GHz
.. -57dBm to 1GHz
-47dBm 1GHz to 4GHz
Conducted Spurious Emissions: (T856 Only)
Transmit
Standby
.. -36dBm to 1GHz
-30dBm 1GHz to 4GHz
.. -57dBm to 1GHz
-47dBm 1GHz to 4GHz
Power Output:
T856
- Rated Power
- Range Of Adjustment
T857
Duty Cycle (T856 Only)
1.2.4
Audio Processor
1.2.4.1
Inputs
Inputs Available
.. 25W (see Duty Cycle)
.. 5-25W
.. 1W ±300mW
.. 100% @ 25W at +25°C
.. 25% @ 25W at +60°C
.. 100% @ 10W at +40°C
.. line, microphone and CTCSS
Line Input:
Impedance
Sensitivity (60% modulation @ 1kHz)With Compressor
Without Compressor
29/02/00
.. 600 ohms (balanced)
.. -50dBm
.. -30dBm
Copyright TEL
T856/857 General Information
M850-00
C1.11
Microphone Input:
Impedance
Sensitivity (60% modulation @ 1kHz)With Compressor
Without Compressor
1.2.4.2
.. 600 ohms
.. -70dBm
.. -50dBm
Modulation Characteristics
Frequency Response
(below limiting)
.. flat or pre-emphasised (optional)
Line And Microphone Inputs:
Pre-emphasised ResponseBandwidth
Below Limiting
Flat Response
.. 300Hz to 3kHz (WB & MB)
.. 300Hz to 2.55kHz (NB)
.. within +1, -3dB of a 6dB/octave
pre-emphasis characteristic
.. within +1, -2dB of output at 1kHz
Above Limiting Response
.. within +1, -2dB of a flat response
(ref. 1kHz)
Distortion
.. 2% max.
Hum And Noise:
Wide Bandwidth
Mid Bandwidth
Narrow Bandwidth
.. -55dB (300Hz to 3kHz [EIA]) typical
.. -54dB (CEPT)
.. -50dB (CEPT)
Compressor (optional):
Attack Time
Decay Time
Range
1.2.4.3
.. 10ms
.. 800ms
.. 50dB
CTCSS
Standard Tones
.. all 37 EIA group A, B and C tones
plus 13 commonly used tones
Frequency Error
(from EIA tones)
.. 0.08% max.
Generated Tone Distortion
.. 1.2% max.
Generated Tone Flatness
.. flat across 67 to 250.3Hz to within 1dB
Modulation Level
.. adjustable
Modulated Distortion
.. <5%
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C1.12
T856/857 General Information
1.2.5
Microcontroller
M850-00
Auxiliary Ports:
Open Drain Type
Vds max.
1.2.6
.. capable of sinking 2.25mA via 2k2Ω
.. 5V
Test Standards
Where applicable, this equipment is tested in accordance with the following standards.
1.2.6.1
European Telecommunication Standard
ETS 300 086 January 1991
Radio equipment and systems; land mobile service; technical characteristics and test
conditions for radio equipment with an internal or external RF connector intended primarily for analogue speech.
ETS 300 113 March 1996
Radio equipment and systems; land mobile service; technical characteristics and test
conditions for radio equipment intended for the transmission of data (and speech) and
having an antenna connector.
ETS 300 219 October 1993
Radio equipment and systems; land mobile service; technical characteristics and test
conditions for radio equipment transmitting signals to initiate a specific response in the
receiver.
ETS 300 279 February 1996
Radio equipment and systems; electromagnetic compatibility (EMC) standard for private land mobile radio (PMR) and ancillary equipment (speech and/or non-speech).
1.2.6.2
DTI CEPT Recommendation T/R-24-01
Annex I: 1988
Technical characteristics and test conditions for radio equipment in the land mobile
service intended primarily for analogue speech.
Annex II: 1988
Technical characteristics of radio equipment in the land mobile service with regard to
quality and stability of transmission.
1.2.6.3
Telecommunications Industry Association
ANSI/TIA/EIA-603-1992
Land mobile FM or PM communications equipment measurement and performance
standards.
29/02/00
Copyright TEL
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