User's Manual

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80 UltraWAVE BTS Installation and Commissioning Guide, Release 6.5A

5 Make a call through the BTS. After the initial setup messages, the following log as described

in Figure 5-2 will be produced every five seconds for each call in progress. Figure 5-2 shows

what each set of bytes means. Note that all of the counters are either two or four bytes, in

twos complement.

The TRX and DSP numbers that are being used appear immediately to the left of the EVTI.

The “DSP count of bit errors” shows the bit errors estimated by the DSP in the uplink

direction, for every five seconds (250 speech frames). Under normal testing conditions

where the mobile is stable and reasonably close to the BTS, this value should remain 00

during testing. If the value is consistently high (that is, above 10) then it is recommended

that you perform a Racal test to determine the serviceability of the TRX.

6 Place calls through each TRX and DSP. To allocate calls to different TRXs and DSPs refer to

the procedure used in Section 5-2.

This estimate of BER is not 100% accurate, because a codeword after

data corruption can be mapped to another valid codeword, thus

undetected by the DSP error estimation mechanism of decoding,

re-encoding and bit-comparison.

Figure 5-2 Description of DSP Event Indication (EVTI) messages

EVTI(27,0c) 34 00 fa ff b2 00 fa 00 00 00 00 00 00 08 00 00 73 55 e0 00 03 2b 5e 35 ed 14 aa 00 00

uplink___^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^

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accumulated viterbi cost (4 bytes)_______________| | | | |

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accumulated eq quality (4 bytes)______________________| | | |

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rx rssi_________________________________| | |

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rssi in log10_________________________| |

AGC Parameters__________________|