Telit Wireless Solutions LM940 User manual

1. Introduction
This document provides how to use Telit Interface Board and LM940 module for
certification testing.
2. TLB+SDK use guide
Telit LM940
UMTS/HSPA/LTE Module (Data only)

POWER SUPPLY
You can use the both 110V and 220V power for adapter.
SIM Card
You can use the SIM1 Connector on the top interface board.
POWER ON
To power ON the Telit module, plug adapter in adapter port located on the side of
interface board.
POWER OFF
To power OFF the Telit module, Unplug the adapter.
RF cable to SMT connector loss
699 ~ 960 MHz: 0.1 dB
1710 ~ 2690 MHz: 0.25 dB
2300 ~ 2690 MHz: 0.4 dB

MODEM RESET
To reset the Telit module, Press the RESET button down for 2 seconds.
RF ANTENNA
For RF antenna, You can use Main antenna port and Auxiliary antenna port.
GNSS ANTENNA
For GNSS antenna, you can use GNSS antenna port.
AT COMMANDS / DATA Port
Use the micro USB 3.0 (install provided USB driver first)
- For AT commands – Telit Auxiliary Port
- For data throughput – Telit HS-USB WWAN Adapter

3. TLB+IFBD use guide
You can refer the following picture for cable connection.

POWER SUPPLY
You can connect Power Supply Cable with 3.3 V power supplier (from 3.1 to 3.6V).
SIM Card
You can use the SIM1 Socket on the top interface board.
POWER ON
To power ON the Telit module, connect power supply cable with power supplier.
POWER OFF
To power OFF the Telit module, Unplug power supply cable.
Auxiliary Antenna port
(LTE & WCDMA Diversity +
GNSS for passive antenna)
Main Antenna port
(LTE & WCDMA
)
RF cable loss
•699 ~ 960 MHz : 0.4 dB
•1710 ~ 2690 MHz : 0.6 dB
•2300 ~ 2690 MHz : 0.8 dB

MODEM RESET
To reset the Telit module, Press the RESET button down for 2 seconds.
RF ANTENNA
For RF antenna, you can use Main antenna port and Auxiliary antenna port.
GNSS ANTENNA
For GNSS antenna, you can use GNSS antenna port.
AT COMMANDS / DATA Port
Use the micro USB 3.0 (install provided USB driver first)
- For AT commands – Telit Auxiliary Port
- For data throughput – Telit HS-USB WWAN Adapter

4. Module detachment from TLB board
You can separate module from TLB board referring the following STEP1 and STEP2.
PRESS
LIKE THIS
Before detaching
STEP
“1”
*Note
After step 1,
you are able to detach a module
from TLB like STEP”2” picture.
STEP
“2”
After STEP “1”
*Note
When detached, the thermal pad is
attached to the module because it is
sticky.
So, you should move thermal pad and
attach back it on TLB board.
MOVE

Please let me know if you have any questions or need more details.
Thanks.