Team Black Sheep Crossfire RC System - Manual

RSSI
Relative signal strength indicator
How “loud” the signal is, that the receiver “hears”. But this also includes noise.
The RSSI is exponential which results in a massive drop at the beginning and slows down the lower it gets.
In general: double the range will result in a drop of -6dBm. An example:
● RSSI at 0m = -10dBm
● RSSI at 1m = -16dBm
● RSSI at 2m = -22dBm
The CROSSFIRE can go down to -130dBm before the link breaks up. If you use RSSI as a sensor by the
channel/ output map menu or as an OpenTX telemetry sensor, it will be shown like this:
● -0.1dBm = 100%
● -130dBm = 0%
SNR
Signal-to-Noise ratio
It shows you the ratio between the received noise and your CROSSFIRE signal.
To judge RSSI properly you need to know the SNR and compare it with your RSSI value. The CROSSFIRE can
receive signals in the noise down to -6dB.
Example:
An RSSI of -80dBm is fine. But with an SNR of -2dBm, it’s really bad.
Positive numbers mean the CROSSFIRE signal is “louder” than the noise,
negative Numbers mean the noise is louder than the CROSSFIRE
Warning levels
Sensor
Prewarning
Critical
RSSI
30% / -100dBm
20% / -106dBm
LQ
70% (BF: 1:70)
60% (BF: 1:60)
LQ fixed 150Hz
40% (BF: 2:40)
30% (Bf: 2:30)
RSSI/ LQ
30%
20%
SNR
4dB
0dB
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