Topcon GR-3 User Manual

Introduction
GR-3 Operator’s Manual
1-14
page 4-8 for more information. Table 1-2 on page 1-14 describes the
REC LED status when using the FN button.
Table 1-2. FUNCTION Button Operations and REC LED Status
FN (FUNCTION)
Key
REC LED Status
When data recording is off, and the FN key is...
Not pressed
No light No data recording.
Orange blink Internal file system test in progress.
Red No free memory; hardware problem with
data recording; SD/MMC card is not
inserted.
Pressed for < 1
second
If FN key mode is “LED blink mode switch”
Orange Release to change information mode.
If FN key mode is “Occupation mode switch”
Orange No function.
Pressed for 1–5
seconds
If FN key mode is “LED blink mode switch”
Green Release to start data recording (post-
processing occupation mode undefined).
If FN key mode is “Occupation mode switch”
Green Release to start recording (Kinematic or
Static post-processing occupation mode).
Pressed for 5–8
seconds
Red Release to turn serial port A baud rate to
9600 bps.
Pressed for > 8
seconds
No light No function.

Topcon GR-3 Specifications

General

Brand	Topcon
Model	GR-3
Category	Receiver
Language	English