What Actions To Take - Vislink Strata RX Technical Reference Manual

Table D-2: Actions at Link Quality Levels
LQ LInk Quality
Reading Description
9 Excellent Link
Quality
8 Very Good Link
Quality
7 Standard Link
Quality
6 Average Link
Quality
5 Below Average
Link Quality
4 Poor Link Quality
1 - 3 Unsatisfactory
Link Quality
0 No signal
detected.
D.3.5

What Actions to Take

To improve the Link Quality, we suggest the following general
sequence of actions. You should develop your own action plan
so you're prepared in case LQ begins to fall.
1. Optimize RCL.
No signal: Check channel and frequency - be sure
-
they match the transmitted signal.
- If RCL is -70 dBm or lower, the signal is weak.
Strata RX Technical Reference Manual
Recommended Action
None required.
Most transmissions are made
with LQ of about 7.
Begin to take action.
Rapidly take additional
actions.
Immediately take all available
actions.
Reposition transmit and receive antennas, or increase
transmit power if possible.
- An RCL of -40 to -30 dBm is ideal.
- RCL should be less than -25 dBm. Signals stronger
than this can overload the RX and actually make the
demodulated signal quality worse.
2. Optimize SNR
- If RCL is OK, but SNR is low (13 -15 dB or less), there
may be electrical equipment (or other transmitters) in
the immediate area creating noise.
- Try other channels and offsets to avoid other
transmitters.
- Isolate noise sources by shutting down other
equipment.
3. Optimize BER
No signal: Check the COFDM BW setting to be sure it
-
matches the incoming signal.
Change transmit settings to make the link more
-
robust. You will achieve a lower Data Transfer Rate as
you do so. See Table D-3.
Note - Factory default settings are highlighted in
green.
- The receiver will automatically adjust for the new
settings.
Note - BW must be manually set to match the
transmitter.
Link Quality D-4