Campbell Scientific TX320 Transmitter - Manual (Page 25)

TX320 Transmitter
7. Installation
7.1 Field Site Requirements
The TX320 has two siting requirements for proper operation. The GPS
antenna must have a clear view of most of the sky. The transmission antenna
must have a clear view of the spacecraft. Other requirements are not specific to
the TX320, but are mentioned here anyway. The TX320 must be mounted in
an enclosure that will protect it from the environment, including condensation.
Most GOES systems are powered by a battery that is charged by a solar panel.
The solar panel must have a clear view of the southern sky. Pay special
attention to winter sun angles.
7.2 TX320 Functions
7.2.1 LED Function
The TX320 has four LEDs used to indicate the state of the TX320 transmitter.
When power is first applied to the TX320, the four LEDs will cycle through
quickly, then the SYNCHRONIZING CLOCK TO GPS LED will light for
15 minutes.
If there are data in a buffer waiting for transmission time, the DATA IN
BUFFER LED will light.
During transmission, the TRANSMITTING LED will light.
The STATUS LED will only light after the DIAGNOSTICS button has been
depressed. Press and hold the DIAGNOSTICS button for about 2 seconds.
The STATUS LED will flash once to indicate the fail-safe has not been
tripped. If the LED flashes twice, the fail-safe has tripped. To clear the fail-
safe, press and hold the DIAGNOSTICS button for about 10 seconds.
7.2.2 Communication Ports
The CS I/O port and RS-232 port share the same hardware and
therefore cannot be connected simultaneously. Presence of 12 V
on the CS I/O port disables the RS-232 port and enables the CS
I/O port. NOTE
7.2.2.1 CS I/O Port
The CS I/O port is an SDC port. The CS I/O port is specifically designed to
work with Campbell Scientific SDC capable dataloggers. The CS I/O port is
used by Campbell Scientific dataloggers to transfer data from the datalogger to
the TX320 transmitter. The CS I/O SDC port allows other SDC devices and
one modem enabled device to be connected to the same port at the same time.
This SDC port will allow the TX320 transmitter, the RF500M RF modem and
a phone modem to be connected to the datalogger serial port all at the same
time. The CS I/O port is a DB9 male, voltage levels are TTL, SDC address 4,
pin out is:
15