Nokia 21XX User Manual

 

 

27

 
        ++++++++++++++        ############## 
        +aaa bbb ccc +        #EAA Ada ERL # 
        +ddd eee fff +        #RxG TxG GLi # 
        +ggg h i jjj +        #TxN Sta Mod # 
        + kkkk llll  +        # RVAD TVAD  # 
        ++++++++++++++        ############## 
 

 

Decimal point and sign are not shown in values. This means: 

 

-10.5dB would be displayed as "105" 

 

-0.5 dB would be displayed as "  5" 

 
aaa 

Electro-acoustic attenuation of echo from DSP point of view in dB 

bbb 

Adaptive attenuation of echo 

ccc 

Total echo return loss 

ddd 

RX attenuator gain in dB  

eee 

TX attenuator gain in dB  

fff 

Gain limit for RX and TX  

ggg 

Tx noise level in dB 

h 

Adaptive filter status (0 or 1) 

I 

Comfort noise generation (0 or 1) 

jjj 

AEC mode (0 or 1) 

kkkk 

Shows 16 last RX VAD decisions in HEX format 

Llll 

Shows 16 last TX VAD decisions in HEX format  

 

 
        ++++++++++++++    Example:   ++++++++++++++         ############## 
        +aaaaa bbbbb +               +12345 54321 +         #MiCutB MiCTA# 
        +ccccc ddddd +               + 2353 46187 +         #EpCutB EPCTA# 
        +-ee.e -ff.f +               +-46.5 -27.4 +         #MicLev EarLv# 
        +            +               +            +         #            # 
        ++++++++++++++               ++++++++++++++         ############## 
 

aaaaa 

Saturated samples before microphone equalizer in decimal 16 bit unsigned 
integer format. 

bbbbb 

Saturated samples after microphone equalizer in decimal 16 bit unsigned 
integer format. 

ccccc 

Saturated samples before earpiece equalizer in decimal 16 bit unsigned 
integer format. 

ddddd 

Saturated samples after earpiece equalizer in decimal 16 bit unsigned 
integer format. 

-ee.e 

Level of the microphone signal level detector in dB format. 
Requires log10 function in MCU. 16 bit signed value in DSP, 0 dB = 32768. 

-ff.f 

Level of the signal after earpiece equalizer in dB format. 
Requires log10 function in MCU. 16 bit signed value in DSP, 0 dB = 32768. 

 

The display is reset and restarted when a call is placed. When the call is terminated 
the display is frozen to show the last values. Display will not be saved to EEPROM. 
Saturated sample counters aaaaa - ddddd are counted in DSP and only the new counter 
value is sent to MCU. The microphone and earpiece signal levels are calculated in DSP 
and it sends the linear values to MCU which makes the linear to dB transformation 
(20*log10(x)) for the level values.