User`s guide

4000/5000 Modems’ User Guide

Test

 REG light on the modem should be flashing, indicating that the modem is

registered on the wireless network (in coverage)

 Using BVDM, you can also read the modem’s diagnostic where received signal

strength (RSSI) is shown in bars and dBm

Æ You should have at least one signal bar or -98dBm

 Another important parameter is the Ec/Io value available from BVDM >

Diagnostic > Advanced. BVDM shows the a numeric value that converts in dBm

by multiplying by -0.5.

Æ You should have at least -15dB

GPS antenna

If you’re using a 5200 or a 5600 modem model, it has an additional SMA connector for

the GPS antenna. The selected GPS antenna must meet the following specifications:

 Active antenna with 3.3 volts preamplifier

 Nominal 50 Ohms impedance

 Male SMA connector

 Frequency band: 1575 MHz