June 2003 IPN: M5000-00-105
Tait Orca vehicle kit F - 17
Custom modifications
The following information is provided to
enable modifications to be made to the stand-
ard vehicle kit installation:
■
signal descriptions and specifications for
the vehicle kit external connectors;
■
block diagrams of the vehicle kit PCBs;
and
■
circuit descriptions for each vehicle kit
PCB.
Detailed circuit diagrams and component
location information for the vehicle kit PCBs
may be obtained from Technical Support.
Contact your Tait dealer for more information.
Using external function buttons
It is possible to interface to the radio’s external
function buttons through any of the vehicle
kit’s external PTT connections:
■
the accessory data connector (SK3);
■
the mobile microphone socket (SKT1); or
■
the remote PTT socket (EXT-PTT).
A resistor and a switch is needed for each exter-
nal function button. See “BUTTON-1 and
BUTTON-2” on page F-6 for more details.
For example, it is possible to modify a standard
TOP speaker microphone (e.g. TOPA-AA-
001G) to allow the use of external function
buttons. To do this, add two resistors inside
the microphone, disconnect the speaker, and
crimp a 6-way phone plug onto the cable.
Setting up ‘hookswitch’ functionality for a
trunked radio
‘Hook switch’ functionality can be achieved by
programming external function BUTTON-1 to
Clear
. As long as the microphone clip is
grounded, then whenever the mobile micro-
phone is on-hook, the call will be cleared
down. You must unclip the microphone before
a call can be initiated.
Note that you do not need to add any resistors,
as the mobile microphone already has an inter-
nal 12 k
Ω
resistor wired correctly.
Figure F-8: Vehicle kit - rear view showing external
connectors
Vehicle kit external connectors
The tables on page F-18 document the signals
available on all of the vehicle kit’s external
connectors.
Note that the 25-way accessory/data connector
provides access to all of the radio’s accessory
signals, as well as a few vehicle kit specific signals.
See “Tait Orca 5000 accessory connector” on
page F-3 for further details about accessory
signals.
1
3
4
5
6
2
7
ACCESSORY
PTT
8
Ω
12-16V
Antenna BNC connector
Accessory/data connector
Mobile microphone socket
External speaker connector
Remote PTT connector
Visor microphone connector
Power/ignition sense connector
1
2
3
4
5
6
7
Summary of Contents for Orca 5000
Page 1: ...Tait Orca 5000 Portable Radios Service Manual June 2003 IPN M5000 00 105 ...
Page 4: ...iv June 2003 IPN M5000 00 105 ...
Page 22: ...B 2 June 2003 IPN M5000 00 105 ...
Page 36: ...B 16 Circuit descriptions June 2003 IPN M5000 00 105 ...
Page 38: ...B 18 Circuit diagrams June 2003 IPN M5000 00 105 ...
Page 40: ...B 20 Circuit diagrams June 2003 IPN M5000 00 105 ...
Page 42: ...C 2 June 2003 IPN M5000 00 105 ...
Page 78: ...E 2 June 2003 IPN M5000 00 105 ...
Page 94: ...F 2 June 2003 IPN M5000 00 105 ...
Page 118: ...G 2 June 2003 IPN M5000 00 105 ...
