Midian Encryption Programming and Service Manual Tait Orca Portable (TOP) Encryption 29
June 2006 © Tait Electronics Limited
Signal levels and pin assignments
3.3 Programming the TOP Radio
Before programming the TOP Encryption radio, you will need:
■ up-to-date standard Tait Orca Portable (TOP)
Programming Applications installed, and familiarity with their
operation. TOP Programming Applications are on the CD with
the TOPA-SV-116 Programming Kit or from http://
support.taitworld.com/ at Portable/Programming Software
which requires Tait Authentication System (TAS) access.
■ conventional and trunked programming applications
■ download and configuration application
■ calibration application
■ encryption flex fitted to the TOP radio. The flex is available in the
TOPA-EA-001 Encryption Upgrade Kit. Instructions for fitting begin
on page 29.
Function Mode Name Pin Module TOP Radio
Power Supply V+ 1 5V regulated
Reset I/P RS 2 Active low
Resets whenever supply lower
than 4.75V
Tx pressel I/P PTT 3 Active low CMOS
Busy I/P RX 4 Active low CMOS
Mode I/P MO 5 Active low Momentary or level sensitive
Data to Scrambler I/P D-SC 6
Hardwired module
programming I/P
If reqd.
Data to Radio O/P D-RA 7
Hardwired module
programming O/P
If required
Mode Indicator O/P IND 8 Active high 3mA into LED
Emergency I/P EMG 9 Active Low Module pull-up to 5V
Code select 8 I/P CS8 10 Active Low Module pull-up to 5V
Code select 4 I/P CS4 11 Active Low Module pull-up to 5V
Code select 2 I/P CS2 12 Active Low Module pull-up to 5V
Code select 1 I/P CS1 13 Active Low Module pull-up to 5V
Ground Gnd 14
Transmitter to
scrambler
I/P TX-SC 15 AC coupled to 250Hz
200 mV p-p at 1kHz for 2/3 max
deviation
Scrambler to
transmitter
O/P SC-TX 16 DC coupled Approx. unity thru gain
Receiver to scrambler I/P RX-SC 17 AC coupled to 250Hz
650 mV p-p at 1kHz for 2/3 max
deviation
Scrambler to
Receiver
O/P SC-RX 18 DC coupled Approx. unity thru gain
Audio alert O/P AL 19 DC Coupled
Trunking delay I/P TRK 20 Provision for future
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