Message "BER counters are out of range!"

Hi, there is a particular problem for this message in red? How it is fixable? Where is  in the AP or SM the value for the "Out of range"?

SM ******System Startup******
System Reset Exception -- User Initiated Reset
Software Version : CANOPY 14.2 (Build 15) SM-AES
Board Type : P11
Boot Bank : 0
Board Temperature : 46 C / 116 F
Device Setting : 5.4/5.7GHz MIMO OFDM - Subscriber Module - 0a-00-3e-b3-XX-XX<br />No valid accounts configured. Using default user account
FPGA Version : 040716
FPGA Features : AES, Sched;
05/18/2016 : 21:25:02 CET : :Timezone set to CET;
05/20/2016 : 06:20:07 CET : Sector Spectrum Analysis complete for 16 minutes 40 seconds. Previously connected to AP: 0a-00-3e-a0-XX-XX;
05/20/2016 : 18:43:26 CET : :BER counters are out of range! PktCount=1 QPSK A=349 B=804
Link: Downlink Status
Receive Power :
-57.9 dBm ( -60.0 dBm V / -62.0 dBm H )
Signal Strength Ratio :
3.0dB V - H
Signal to Noise Ratio :
31 V / 29 H dB
Beacons :
100 %
Receive Fragments Modulation :
Path V:QPSK:41% 16-QAM:41% 64-QAM:17%
Path H:QPSK:35% 16-QAM:33% 64-QAM:32%
Latest Remote Link Test Efficiency Percentage :
NA %
BER Total Avg Results :
Beacons Received Last 15 minutes :
0/0/0% (min/avg/max) Note: The SM needs to be in session for at least 15 minutes.

Uplink Status
Transmit Power :
21 dBm
Max Transmit Power :
22 dBm
Power Level :
-59.2 (-64.0 V / -61.0 H) dBm
Signal Strength Ratio :
-2.0dB V - H
Signal to Noise Ratio :
36 dB V / 31 dB H
Latest Remote Link Test Efficiency Percentage :
NA %

Local Status
Session Status :

Latest Local Link Test Results
Stats for LUID: 5   Test Duration: 2   Pkt Length: 1714   Test Direction Bi-Directional

RF Link Test
VC Downlink Uplink Aggregate Packet Transmit Packet Receive Actual Actual
21 47.36 Mbps 29.94 Mbps 77.31 Mbps,  5528 pps 4268 (2134 pps) 6789(3394 pps)

Downlink Uplink Efficiency Fragments
count Signal to
Noise Ratio Efficiency Fragments
count Signal to
Noise Ratio Actual Expected Actual Expected
82% 223882 185031 31 dB V
31 dB H
90% 128844 116964 31 dB V
32 dB H

Link Quality
RF Path Modulation Fragments Modulation
Percentage Average Corrected
Bit Errors
V QPSK 30635 33% 0.440
V 16-QAM 30612 33% 0.512
V 64-QAM 30567 33% 0.493
H QPSK 30520 33% 0.354
H 16-QAM 30504 33% 0.376
H 64-QAM 30465 33% 0.534

RF Path Modulation Fragments Modulation
Percentage Average Corrected
Bit Errors
V QPSK 11160 33% 0.313
V 16-QAM 11136 33% 0.328
V 64-QAM 11131 33% 0.325
V 256-QAM 64 <1% 9.265
H QPSK 11021 33% 0.494
H 16-QAM 11027 33% 0.590
H 64-QAM 11008 33% 0.702
H 256-QAM 8 <1% 11.250

Link Test ran on 12:20:37 05/26/2016 CET

Currently transmitting at:
VC 21 Rate 8X/6X MIMO-B

Receive BER Results

Current Receive BER modulation: QPSK

Total bits received : 572322008

           Bit Errors: 292033569
           Bit Error Rate: 3.662182e-03
           Bit Errors: 999474348
           Bit Error Rate: 1.253369e-02

Combined BER: 8.097933e-03

As per the stats it seems that link is performing good.The only thing what strikes me is the Path B(Vertical)might have some issues.Before we jump into it please go through with below explaination.Which will help you understanding the issue.

In wireless communication system, the number of bit errors is the number of received bits of a data stream over a communication channel that have been altered due to noise, interference, distortion or bit synchronization errors.
As an example, assume this transmitted bit sequence:
0 1 1 0 0 0 1 0 1 1
and the following received bit sequence:
0 0 1 0 1 0 1 0 0 1,
The number of bit errors (the BOLD & Underlined bits) is, in this case, 3. The BER is 3 incorrect bits divided by 10 transferred bits, resulting in a BER of 0.3 or 30%.The lower the BER (near to 0)the better the link will be.

Factors affecting BER:-
The interference levels present in a system are generally set by external factors and cannot be changed by the system design. However it is possible to set the bandwidth of the system. By reducing the bandwidth the level of interference can be reduced. However reducing the bandwidth limits the data throughput that can be achieved.

2.)Increase transmitter power:
It is also possible to increase the power level of the system so that the power per bit is increased. This has to be balanced against factors including the interference levels to other users and the impact of increasing the power output on the size of the power amplifier and overall power consumption and battery life, etc.

3.)Lower order modulation:
Lower order modulation schemes can be used, but this is at the expense of data throughput.
Reduce bandwidth: Another approach that can be adopted to reduce the bit error rate is to reduce the bandwidth. Lower levels of noise will be received and therefore the signal to noise ratio will improve. Again this results in a reduction of the data throughput attainable.

I know I went little away from what you were asking actually. But I would say the information posted here will help you and every post reader in future.

Deepesh Chandra Sharma.
Technical Specialist-L3 Networks.
Cisco Certified Network Professional.
Cambium Certified over PMP/PTP/ePMP.

1 Like