User's Manual

R-TRON Proprietary & Confidential Page 16
① When the Modem is properly connected, you will see ‘READY’ im green, like in the
above picture[number 1].
② Then you can click the NMST button [number 2] and test the AT Command. When
you see the ‘OK’ response, this means that the modem and SNMP board status is
Okay.
2.5 Check RSSI Value and Set Attenuation
2.5.1 Set Attenuation
After check the RSSI value which is displayed on the GUI, set the RSSI value as -70dBm, using
the modem attenuation. For example, when the GUI RSSI value is -67dBm, you can set it as -
70dBm, using the modem attenuation 3dB. To set the attenuation, you can input the attenuation
value in white box and then click the ‘modem atten’ button which is located on the left side to
store it. (Ex-factory setting value of HB 1900 : user attenuation is 12dB , Heartbeat interval is
5 minutes.)
Ex) How to set User Attenuation
Antenna input Level Fixed Loss User Attenuation Reference RSSI Value
-30dBm -15dB -25 dB -70dBm
-40dBm -15dB -15 dB -70dBm
-50dBm -15dB -5 dB -70dBm