Tornado Operational target signal and RSSI for 64QAM

Tornado Operational target signal and RSSI for 64QAM

Tornado RSSI and Signal quality threshold 


Tier 1 remote install for operation at 64QAM using 50kHz channel, the target signal quality of 90% and target RSSI of between -91 dBm and -41 dBm should be used.

If the signal quality for both receivers is higher than 90% and both receivers RSSI is between -91 and -41 dBm then the site can be considered good and will most likely run correctly at 64QAM. When either receiver signal quality or RSSI fall outside these bounds then investigation of what can be done at the site to improve the level or quality should be undertaken

Please Note:
if the RSSI exceeds -41dBm then an attenuator should be fitted to bring the RSSI down to within the target range.  MiMOMax normally factor up to 5dBm constructive fade which could put the receiver into compression which will impact the quality of the received signal.
If the signal quality or RSSI falls below -91dBm an MDL radio or when using adaptive modualtion the radio will in many cases will reliably run at a lower modulation.  


Low signal level threshold

The signal level (dBm) at which a low signal level SNMP trap is sent, and/or a low signal alarm is raised.
You can use these suggested values for each modulation with a 25 kHz channel

For a BER of around 10-7
256QAM = -90dBm
64QAM = -97dBm
16QAM = -103dBm
QPSK = -110dBm

For a BER of around 10-4
256QAM = -92dBm
64QAM = -99dBm
16QAM = -105dBm
QPSK = -112dBm

Low signal quality threshold

The signal quality level (%) at which low signal quality SNMP trap is sent. Adequate signal quality is required for a good link and it depends on the modulation setting.
The signal quality settings can be based on the following values with a 25 kHz channel.

For a BER of around 10-7
256QAM = 95%
64QAM = 85%
16QAM = 65%
QPSK = 10%
For a BER of around 10-4
256QAM = 90%
64QAM = 80%
16QAM = 55%
QPSK = 1%

    • Related Articles

    • [Tornado] Typical Power Consumption Values

      Tornado radios always establish a full duplex connection as the system requires feedback to operate. Because of this we provide the following power consumption figures: 1) Rx in standby (listening for an incoming transmission), Tx Idle. (M-PoD) 2) Rx ...

    • [Tornado] Transmitter Enable Options During Tests

      Introduction During commissioning or fault finding, engineers and technicians may need to turn on the transmitters individually, there are three options available for Tornado which may be similar on Pyxis Tech level using CCMS The RF Tx and Rx ...

    • [Tornado] How to transfer and apply files via SCP and TFTP

      To transfer files from the Radio to a PC there are several items required. An SCP server installed on a Laptop if transferring files Firewall disabled or a firewall rule added to pass port 22 Valid files such as the Encryption Key if this to be ...

    • [Tornado] Configuring a Terminal Server Session

      Setting up a Terminal Server Session between a BRUT and RRUT on 4.05.01 Configure one of the Serial ports from each unit as a Terminal Server, setting the BRUT as the Master: BRUT CCMS, (Serial IP must be in a different subnet than Eth IP, and Serial ...

    • Configuration backup on Tornado and Pyxis

      The development team have coded two options to capture the radios current configuration, they both produce a text based output which can be compared by another application or compare tool to detect configuration changes and for version control. We do ...