MTX-HSPA-PH8-P+G
www.mtxm2m.com
www.matrix.es
2014/11 v2.0
Page
36
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68
MTX Terminals® by MATRIX ELECTRONICA S.L.U
Both analog audio interfaces can be used to connect headsets with microphones or speakerphones.
Headsets can be operated in audio mode 3 and speakerphones in audio mode 2. Audio mode 5 can
be used for direct access to the speech coder without signal pre- or post-processing.
When shipped from the factory, all audio parameters of MTX-HSPA-PH8-P+G are set to interface 1
and audio mode 1. This is the default configuration optimized for the Votronic HH-SI-30.3/V1.1/0
handset and used for type approving the MTX Modems
’
reference configuration. Audio mode 1 has
fixed parameters which cannot be modified. To adjust the settings of the Votronic handset simply
change to another audio mode.
Audio mode no.
AT^SNFS=
1
2
3
4
5
6
Name
Default
Handset
Router
User Handset Headset
Speaker
phone
Transparent
Purpose
DSB with
Votronic
handset
Analog
phone
interface
Mono
Headset
Handheld
speakerphone
Direct access
to speech
coder
TX-Filters
Adjusted
Flat
Adjusted
Flat
Flat
Flat
RX-Filters
Adjusted to
fit artificial
ear type
3.2 low
leakage
Flat
Adjusted to
fit artificial
ear type 3.2
low leakage
800Hz HP
800Hz HP
Flat
Default SNFI Parameters
<micAmp1>
<micAmp2>
<micTxVol>
0 (0dB)
63
(+35.25dB)
16384 (0dB)
0 (0dB)
18 (+1.5dB)
16384 (0dB)
0 (0dB)
63
(+35.25dB)
16384 (0dB)
1 (+20dB)
37
(+15.75dB)
16384 (0dB)
1 (+20dB)
48 (+24dB)
16384 (0dB)
0 (0dB)
21 (+3.75dB)
16384 (0dB)
Default SNFO Parameters
<cdcRxGain>
<rxVol>
<stGain>
61 (+4dB)
33 (0dB)
5514
(-21.5dB)
50 (-7dB)
33 (0dB)
0 (Mute)
61 (+4dB)
33 (0dB)
5514
(-21.5dB)
49 (-8dB)
33 (0dB)
12288
(-15dB)
61 (+4dB)
33 (0dB)
0 (Mute)
58 (+1dB)
33 (0dB)
0 (Mute)
Echo canceller Behaviour
optimized for
ON
low echo
ON
low echo
ON
low echo
ON
moderate
echo
ON
high echo
OFF
Residual echo suppression
with comfort noise generator
ON
ON
ON
ON
ON
OFF
Noise Reduction (Tx)
OFF
OFF
-12dB
-12dB
-12dB
OFF
MIC input signal for 0dBm0,
f = 1024 Hz
15mV
650mV
15mV
12mV
5mV
420mV
EP output signal in mV rms.
@ 0dBm0,
1024 Hz, no load (default
gain) /
@ 3.14 dBm0
465mV
2.1Vpp
512mV
2.1Vpp
465mV
2.1Vpp
370mV
1.6Vpp
1485mV
5.7Vpp
1290mV
5.5Vpp
Sidetone gain at default
settings
20.8dB
-
∞ dB
20.8dB
17.0dB
-
∞ dB
-
∞ dB