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About the Digi IX40
first connect to the 4GLTE network, and if 5Gis available, the device will be able to use it for
additional bandwidth. As a result, the signal bars reflect only 4GLTE signal strength.
4GLTE algorithms
For 4GLTE, the IX40 device determines the RSRP, SNR, and RSSI values separately and uses the
following algorithms to display the signal quality:
RSRP > -85, rsrp_bars=5
-95 < RSRP <= -85, rsrp_bars=4
-105 < RSRP <= -95, rsrp_bars=3
-115 < RSRP <= -105, rsrp_bars=2
-199 < RSRP <= -115, if we're connected to the cellular network, rsrp_bars=1,
if not rsrp_bars=0
If RSRP <= -199, the device uses the RSSI as the value with the same algorithm:
SNR >= 13, snr_bars=5
4.5 <= SNR < 13, snr_bars=4
1 <= SNR < 4, snr_bars=3
-3 < SNR < 1, snr_bars=2
-99 < SNR <= -3, if we're connected to the cellular network, snr_bars=1, if not
snr_bars=0
Once the snr_bars and rsrp_bars values are determined, the device uses the lesser of the two as the
reported signal a bars.
3Galgorithm
For 3G, the IX40 determines RSSI signal strength:
RSSI > -80, bars=5
-90 < RSSI <= -80, bars=4
-100 < RSSI <= -90, bars=3
-106 < RSSI <= -100, bars=2
RSSI <= -106, if we're connected to the cellular network, bars=1, if not bars=0
bars is then reported as the signal strength bars.
2Galgorithm
For 2G, the IX40 determines RSSI signal strength:
RSSI > -80, bars=5
-89 < RSSI <= -80, bars=4
-98 < RSSI <= -89, bars=3
-104 < RSSI <= -98, bars=2
RSSI <= -104, if we're connected to the cellular network, bars=1, if not bars=0
bars is then reported as the signal strength bars.
IX40 serial port connector pinout
The IX40 is a DTE serial device capable of supporting the RS-232, RS-422, or RS-485 electrical signaling
modes. The IX40 default setting RS-232 signaling.
Change the signaling mode
To change the signaling mode:
É
Web
IX40 User Guide
Digi IX40 external hardware
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