MTX -3G-JAVA-IoT User Manual page 65

Headsets can be operated in audio mode 3 and speakerphones in audio mode 2. Audio mode 5 to 9
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-65i 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 Terminals 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. 1 (Default settings,
AT^SNFS= not adjust- able)
Name Default Handset
Purpose DSB with Votronic
handset
Gain setting via AT Fix
command.
Defaults:
inpgaStep 53 (27.25dB)
adclStep 192 (0dB)
spkStep 51 (-6dB)
Power supply VMIC ON
Sidetone ON
Volume control OFF
Echo canceller Cancellation
1
Noise reduction 13dB
MIC input signal for 21mV
0dBm0 @ 1024 Hz
(default gain)
EP output signal in mV 330mV
rms. @ 0dBm0, 1024
Hz, no load (default
gain) /
@ 3.14 dBm0
Sidetone gain at 15dB
default settings
1. In audio modes with noise reduction, the microphone input signal for 0dBm0 shall be
measured with a sine burst signal for a tone duration of 5 seconds and a pause of 2 sec. The
sine signal appears as noise and, after aprox. 12 sec, is attenuated by the noise reduction.
2. Signal for -5dBm0 (due to attenuation of uplink filter at 1kHz)
www.mtxm2m.com
2 3
Basic Headset
Handsfree
Car Kit Headset
Adjustable Adjustable
53 (27.25dB) 53 (27.25dB)
192 (0dB) 192 (0dB)
51 (-6dB) 51 (-6dB)
ON ON
--- Adjustable
Adjustable Adjustable
Cancellation Cancellation
12dB 12dB
29mV 29mV
390mV 630mV
-96dB 17dB
2017/07 v1.2
MTX M2M® by MATRIX ELECTRONICA S.L.U
MTX-xG-JAVA-IoT Family
4 5-9
User Handset Plain Codec
DSB with Direct access
individual to speech
handset coder
Adjustable Adjustable
53 (27.25dB) 53 (27.25dB)
192 (0dB) 192 (0dB)
51 (-6dB) 51 (-6dB)
ON ON
Adjustable Adjustable
Adjustable Adjustable
Cancellation --
-- --
2
26mV 35mV
420mV 635mV
-20dB -12dB
10
Transparent
TTY/CTM
device
Adjustable
53 (27.25dB)
192 (0dB)
51 (-6dB)
ON
Adjustable
Adjustable
--
--
35mV
635mV
-96dB
/
Page 65 105