
FASTRAK MANUAL
Rev. G
18
JUNE 2012
Figure 7-4 Sync Connector Identification (Input and Output)
NOTE: If a ground is required, use a shielded cable and use the shield as the ground
reference.
7.7 Frequency Select Module
The Frequency Select Module is used to select the operating carrier frequency of the FASTRAK
system. It is located inside the SEU, directly behind the Transmitter input connector. The
alternate carrier frequencies are produced by inserting the required tuning module in the socket
provided. The Frequency Select Modules are color coded for carrier frequency identification as
described in
, page
IMPORTANT NOTE: As with any handling of an electronics printed circuit board (PCB), when
inserting other frequency select modules to change the carrier frequency, static electricity
precautions must be observed. Do not remove and replace frequency select modules with power
applied to the SEU. Also, do not handle or touch the main PCB without first being grounded at
an “ESD-safe” workstation.
7.8 RS-232 I/O
The RS-232 I/O serial connector is a standard, 9 pin, male, “D type” connector located on the
rear panel of the SEU as shown in
. The pinout identification for this
connector is as follows:
FASTRAK End
User End
1
Not used
2
RxD (Receive Data) ----------------------------------- TxD (Transmit Data to the FASTRAK)
3
TxD (Transmit Data) ---------------------------------- RxD (Receive Data from the FASTRAK)
4
Not used
5
GND ------------------------------------------------------ GND
6
Not used
7
Not used
8
Not used
9
Not used