User's Manual

GV57(N) User Manual
TRACGV57UM001 - 13 -
1
Enable
<1.5V @ 150mA
2 Disable Open drain
Table 4: Electrical Characteristics of Digital Output
3.10 LED Status
GV57(N) has two status LEDs that are CELL LED and GNSS LED.
Figure 11. GV57(N) LEDs on the Case
LED
Device Status
LED Status
CELL
(Red)
Device is searching GSM network.
Fast flashing
Device has been registered to GSM network. Slow flashing
SIM card needs pin code to unlock.
On
GNSS
(Blue)
GNSS chip is powered off. Off
GNSS sends no data or data format error occurs.
Slow flashing
GNSS chip is searching GNSS information.
Fast flashing
Table 5. Definition of Device Status and LED
Note:
1. CELL LED status cannot be configured.
2. GNSS LED can be configured to turn off after a period of time using the Manage Tool.