C1.8
T856/857 General Information
M850-00
31/09/98 Copyright TEL
1.2 Specifications
1.2.1 Introduction
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 parame-
ters for which performance according to the CEPT specification is given. Refer to Sec-
tion 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.
1.2.2 General
Number Of Channels .. 128 (standard)
1
Supply Voltage:
Operating Voltage .. 10.8 to 16V DC
Standard Test Voltage .. 13.8V DC
Polarity .. negative earth only
Polarity Protection .. diode
Supply Current:
Transmit - T856 .. 5.5A (typical)
- T857 .. 750mA
Standby .. 150mA (typical)
Operating Temperature Range .. -20°C to +60°C
Channel Spacing
Modulation
100% Deviation
Receiver
IF Bandwidth
Wide Bandwidth 25kHz ±5.0kHz 15.0kHz
Mid Bandwidth 20kHz ±4.0kHz 12.0kHz
Narrow Bandwidth 12.5kHz ±2.5kHz 7.5kHz
1. Additional channels may be factory programmed. Contact your nearest Tait Dealer or
Customer Service Organisation.
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