User's Manual
Figure 1 Programming adaptor
OPTIONS
Channel spacing
The T400 is available in the channel spacings as detailed in the table. The code
designations form part of the product variant type. This is shown on the label fixed to
the top screening cover of the module.
The T400 is FCC approved for 25Khz. The T400B is FCC approved for 12.5Khz.
FREQUENCY RANGE
(MHZ)
CHANNEL SPACING
12.5kHz 25kHz
430 - 450 31 33
450 - 470 51 53
RF connection
As well as the standard BNC coaxial connector, the T400 is also available with a SMB
or flying lead RF connection. Contact Tactical Electronics for details.
CHANNEL SELECTION
The software supplied with the T400 transmitter is the TPRG.exe program. The
software can be run on a PC with the serial port connected to pin 7 of the transmitter
via a suitable adaptor as shown in Figure 1. The unit may be programmed in-situ
provided that pin 7 is available. There is no feed-back facility with this circuit, and for
this reason, the TPRG software repeats the programming three times to eliminate error.
This version of software is programmed by a series of 8 byte data packets at 1200
baud. Each packet includes a 16 bit sync code and an 11 bit checksum to eliminate the
possibility of spurious programming.