PRODUCT OVERVIEW
8
QuickCarrier
®
USB-D MTD-MAT1 User Guide
LED Descriptions
The top panel on the modem contains the following LEDs:
Link LED
- The Link LED indicates that power is present when continuously lit and the device is registered on
the network when blinking.
Signal LEDs
- Three signal LEDs display the signal strength level of the wireless connection. The performance
of the device depends greatly on radio signal strength which also effects the available data rate.
Due to the large number of viable user applications, the LEDs that transmit information about the modem are not
programmed in advance. After connecting the modem to a USB port on the computer, the developer must create
an Application Program Interface (API) using commands taken from the Telit AT command reference guide. The API
will allow the modem to communicate with another software program. Thereafter, the LEDs on the modem will
operate as described above.
Signal Strength
Description
One bar
Weak signal
Two bars
Medium signal
Three bars
Strong signal
Note:
If the signal strength LEDs are not working as expected and you recently installed or updated device
drivers, disconnect the device from the USB port for a few seconds and reconnect to the same USB port.
Note:
The signal strength LEDs are not preprogrammed. However, you can change the setting with the AT#GPIO
command. For details, refer to the AT Commands Manual.
Power Draw
Radio
Voltage
"Live"
Connection Idle
Current
Cellular Call
Box
Connection
No Data
(AVG)
Measured
Current
(Amps) at
Max Power
TX Pulse (AVG)
Amplitude
Current for
GSM850 or
Peak Current
for HSDPA
Total Inrush
Charge measured
in MilliCoulombs
(mC)
LTE
5V
42 mA
40 mA
151 mA
268 mA
.102 mC
Note:
TX Pulse:
The average peak current during a GSM850 transmission burst period or HSDPA
connection. The transmission burst duration for GSM850 can vary, depending on what transmission
scheme is being deployed (GPRS Class 8, Class 10, GSM, etc.).
Maximum Power:
The continuous current during maximum data rate with the radio transmitter at
maximum power.
