Topcon GR-5 - Page 13

Getting to Know Your GR-5
P/N 7010-1022 www.topconpositioning.com
5
The RX TX LED displays the status of the modem.
Table 1-1 describes the LED colors and patterns for the
different modems available for the GR-5 receiver.
Table 1-1. RX TX LED Indications
FH915 Plus/
Digital/Satel
Modems
• No light – modem is turned off.
• Green flashes – modem is in receiver mode.
• Solid Green – a radio link has been established;
modem is ready to receive data.
• Solid Green plus Red flashes – modem is receiving
data.
• Solid Red – modem is in transmitter mode.
• Red flashes – a fault condition has been detected.
Check the condition of the radio modem’s antenna to
ensure it is undamaged, and is connected properly and
securely. Also make sure nothing interrupts the signal.
• Red flashes plus Green flashes – modem is in
command mode.
GSM/GPRS
• Solid Orange (Red and Green) – the modem is
initializing.
• Green flashes – the modem is on, registered on the
network, and is waiting for incoming calls (Slave
mode).
• Solid Red – a connection has been established.
• Green flashes – the modem is in direct control mode
(Daisy Chain).
• Orange flashes – an error has occurred (initialization
error, wrong PIN code, and so forth).