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Operating state / LED
The LED (F, see page 10), on the front panel shows the different
CT3MA operating states:
Operating state
LED
- Not powered
OFF
- Network search
ON (fast flashing)*
- Standby (recorded in the
network)
SLOW FLASHING
* Network search usually requires a few seconds after power on.
If the led stays on flashing check for proper SIM card fitting.
The LEDs (G - H - I) on the front panel in addition to show INPUT and
OUTPUT status indications show also the following CT3MA operat-
ing states:
Operating state
LED
-No SIM card
Fast flashing
- Field intensity measurement
G+H+I according to field
intensity#
#Field intensity is measured only at power on and during the first
seven minutes after device recording on the GSM network. Field
measurement can be stopped by sending whatever command via
SMS message or waiting for seven minutes. G, H and I LEDs indi-
cate field intensity as follows:
Very low intensity
: G Off, H Off and I Off
Low intensity
:
G On flashing,
H Off and I Off
Good intensity
:
G On flashing, H On flashing
and I Off
High intensity
:
G On flashing, H On flashing and I On flashing
If GSM signal intensity level is lower than -109dBm, CT3MA may not
work properly.
