Tait TEL0061 Paging Transmitter User Manual T857 T859 Install A3 pages pd

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Document ID	269943
Application ID	qFAf+vY4gC4kwb6bEi8/CQ==
Document Description	Exciter Installation
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	5.94kB (74276 bits)
Date Submitted	2002-09-12 00:00:00
Date Available	2002-11-07 00:00:00
Creation Date	0000-00-00 00:00:00
Producing Software	Acrobat Distiller 3.0 for Windows
Document Lastmod	0000-00-00 00:00:00
Document Title	T857 & T859 Install A3 pages.pd.PDF

T856/857 Installation
M850-00
F2.1
T856/857 Installation
2.2
2.1
Rack Mounting
The D-range input and output connections are shown in Figure 2.3 and Figure 2.4.
Ensure that the cables are not subjected to any stresses due to tight bends or incorrect
lengths.
The T856 transmitter and T857 exciter are designed for use in a standard 483mm rack
frame using a Tait T800 Series II guide. The guide is securely mounted to the rack frame
with front and rear retaining screws, and the T856/857 is secured into the guide with
two front panel mounting screws. Figure 2.1 shows a standard, double module guide
which can also be fitted with an optional backplane PCB to locate and mate the rear
D-range connector(s). For more information on available guide kits, refer to the T800
Ancillary Equipment Service Manual or your nearest Tait Dealer or Customer Service
Organisation.
A rear mounted N-type connector is used for RF output on the T856/857, while all DC,
audio and control connections are via the rear mounted D-range connector, D-range 1
(PL100). An additional rear D-range connector (T800-03-0000) can be fitted when
remote multichannel operation, or additional control or low frequency lines are
required (refer to Figure 2.2).

 Figure 2.1
Rack Mounting Holes
Rack Wiring
Make sure the RF coax cable to the N-type connector is free from sharp bends or twists.
If access to the rear of the rack frame is restricted, the cable should be long enough to
allow the chassis to be fully withdrawn from the guide.
Sensitivity: -30dBm
10.8 to 16V DC
+13.8V
High isolation
keying option:
6 to 50V DC
10
Opto Key +
To key transmitter:
high impedance
<0.7V = key
Opto Key -
12
Tx Key
13
14
15
Gnd
T800-41-0002 Double Guide Kit
11
Short together for
normal operation
Line I/P1
Line I/P2
Line I/P3
Line I/P4
Tx Enable
Audio 2
Serial Com
CTCSS
Power supply, -ve earth
To key PA, open
collector
External/auxiliary
audio processing
Can
Can be
be configured
configuredas
as
Audio
Audio 11 by
byinternal
internallink
resistors
if required.
link resistors
if required
Refer to Part I.
External CTCSS input:
1kHz deviation @150Hz (500mV rms)
Rack Mounting Holes
Front Panel
Mounting Holes
Figure 2.3 T856/857 D-Range 1 Wiring - Rear View
Aperture For RF
Connectors
Slots For D-Range
Connectors
Rack Mounting Holes
Optional Backplane PCB
Mounts On Rear Of Guide
Rack Mounting Holes
10
CH_SLCT 7
11
SERIAL COM
12
AUX-OUT 0
Open drain type;
capable of sinking
2.25mA via 2k2Ω;
Vds max. = 5V
Front Panel Mounting Hole
TX RELAY DRV
CTCSS DISABLE
13
AUX-OUT 1
14
AUX-OUT 2
15
CH_SLCT 0
CH_SLCT 1
CH_SLCT 2
CH_SLCT 3
CH_SLCT 4
CH_SLCT 5
CH_SLCT 6
GND
Figure 2.2 T856/857 Chassis Connectors
Figure 2.4 T856/857 D-Range 2 Wiring - Rear View
(standard T800-03-0000 kit)
N-Type Connector
Space For Optional
D-Range Plug
(D-Range 2)
Copyright TEL
D-Range Plug
(D-Range 1)
Note:
Figure 2.4 above shows the standard pin allocations for the T800-03-0000
auxiliary D-range kit. A T800-03 auxiliary D-range kit is also available for
special applications requiring custom internal wiring.
31/09/98
F2.2
T856/857 Installation
2.3
Power Supply
M850-00
If a power supply other than an appropriate Tait model is used, ensure that it is capable
of providing enough current to drive the T800 system and is also free from excessive
ripple or noise.
The system should be protected by the use of appropriately rated fuses in the power
supply.
Note:
It is particularly important when the prime power source is a battery that
fuses be employed in all supply lines.
2.4
Reverse Polarity & Overvoltage Protection
A crowbar diode is fitted to all T856 transmitters and T857 exciters for protection
against connection to a power supply of incorrect polarity. It also provides overvoltage
protection from voltage transients caused by lightning strikes.
Note:
29/02/00
A fuse must be fitted in the power supply line for the diode to provide effective protection.
Copyright TEL

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Title                           : T857 & T859 Install A3 pages.pd.PDF

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