Tait TEL0049 One way paging transmitters T857-26-1010 & T857-26 User Manual 8c500 a3 bk

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Document ID	117764
Application ID	hhkBIgpEwXDu8iq9j6Gneg==
Document Description	Diagram of units
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	205.88kB (2573559 bits)
Date Submitted	2000-09-19 00:00:00
Date Available	2000-10-24 00:00:00
Creation Date	2000-07-28 08:00:35
Producing Software	Acrobat Distiller 3.01 for Windows
Document Lastmod	2000-07-28 08:02:13
Document Title	8c500_a3.bk
Document Creator	FrameMaker 5.5.2L11a
Document Author:	daver

M850-00
T856/857 General Information
C1.3
The photograph in Figure 1.1 on the next
page will help you to identify the main
circuit blocks in the T856.
There is a similar photograph in Figure
4.4 which shows the main tuning and
adjustment controls.
Extending both these fold-outs will
allow you to refer to both photographs
while using the manual.
The photograph in Figure 1.2 on the next
page shows the T856 front panel controls.
Copyright TEL
31/09/98
C1.4
T856/857 General Information
M850-00
10
Keys the transmitter (while
disabling the 600Ω line and
microphone audio).
On LED
The On LED is lit when the
T856 is transmitting.
RF output
D-range connector (“D-range 1”) incl. audio in & DC in
(refer to Section 2.2 in Part F)
microcontroller
Line Sensitivity
Sets the gain of the 600Ω line
input of the audio processor.
Supply LED
The Supply LED is lit when
DC power is supplied to the
transmitter.
8 microcontroller and CTCSS
9 duct for cabling to extra D-range (if fitted)
10 D-range
Carrier Switch
Microphone Socket
Key:
low pass filter
PA
exciter drive amplifier
audio processor
VCO
regulators
synthesiser
For connecting a T800-80 microphone to allow local control of
the transmitter. The 600Ω line is
disabled when the PTT button is
pressed.
Figure 1.1 T856 Main Circuit Block Identification
Figure 1.2 T856 Front Panel Controls
31/09/98
Copyright TEL
M850-00
T856/857 General Information
C1.5
The photograph in Figure 1.3 on the next
page will help you to identify the main
circuit blocks in the T857.
There is a similar photograph in Figure
4.5 which shows the main tuning and
adjustment controls.
Extending both these fold-outs will
allow you to refer to both photographs
while using the manual.
The photograph in Figure 1.4 on the next
page shows the T857 front panel controls.
Copyright TEL
31/09/98
C1.6
T856/857 General Information
M850-00
Keys the exciter (while
disabling the 600Ω line
and microphone audio).
RF output
D-range connector (“D-range 1”) incl. audio in & DC in
(refer to Section 2.2 in Part F)
microcontroller
On LED
The On LED is lit when the
T857 is transmitting.
Line Sensitivity
Sets the gain of the 600Ω line
input of the audio processor.
Supply LED
The Supply LED is lit when
DC power is supplied to the
exciter.
duct for cabling to extra D-range (if fitted)
D-range
Carrier Switch
Microphone Socket
Key:
low pass filter
exciter drive amplifier
audio processor
VCO
regulators
synthesiser
microcontroller and CTCSS
For connecting a T800-80 microphone to allow local control of
the exciter. The 600Ω line is disabled when the PTT button is
pressed.
Figure 1.3 T857 Main Circuit Block Identification
Figure 1.4 T857 Front Panel Controls
31/09/98
Copyright TEL
T856/857 Functional Testing
M850-00
C4.9
RV805
CTCSS
level adjust
#CV475
SK805
L1
=IC700
TCXO
R481
L481
C6
RV330
shutdown
power level
IC350 pin 3
RV320
shutdown
temperature
The photograph printed at right
will help you to identify the main
controls used in tuning and adjusting the T856.
There is a similar photograph in
Figure 1.1 which shows the main
circuit blocks.
Extending both these fold-outs will
allow you to refer to both photographs while using the manual.
Copyright TEL
RV310
power control
SW230
carrier
RV210
line sensitivity
RV220
compression level
PL205 PL220 PL215 PL210
Figure 4.4 T856 Main Tuning & Adjustment Controls
31/09/98
C4.10
31/09/98
T856/857 Functional Testing
M850-00
Copyright TEL
T856/857 Functional Testing
M850-00
C4.11
RV805
CTCSS
level adjust
SK805
L1
=IC700
TCXO
C6
The photograph printed at right
will help you to identify the main
controls used in tuning and adjusting the T857.
There is a similar photograph in
Figure 1.3 which shows the main
circuit blocks.
Extending both these fold-outs will
allow you to refer to both photographs while using the manual.
Copyright TEL
SW230
carrier
RV210
line sensitivity
RV220
compression level
PL205 PL220 PL215 PL210
Figure 4.5 T857 Main Tuning & Adjustment Controls
31/09/98

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Linearized                      : No
Modify Date                     : 2000:07:28 08:02:13
Title                           : 8c500_a3.bk
Author                          : daver
Creator                         : FrameMaker 5.5.2L11a
Producer                        : Acrobat Distiller 3.01 for Windows
Create Date                     : 2000:07:28 08:00:35
Page Count                      : 7

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