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參數(shù)資料
| 型號： | MX826DW |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | AMPS/NAMPS SYSTEM AUDIO PROCESSOR |
| 中文描述： | 的AMPS / NAMPS系統(tǒng)的音頻處理器 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大?。?/td> | 328K |
| 代理商： | MX826DW |
AMPS/NAMPS System Audio Processor.
MX826 Preliminary Information
1997 MX
COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480070.004
All trademarks and service marks are held by their respective companies.
12
Ear Audio Out:
An audio output of the Rx path (or selected audios), available as an output for a handset
earpiece. This output, in parallel with the LS Audio Out function, can be connected to V
BIAS
when not
required, by SW7 (Configuration Command (10
H
)). A driver amplifier may be required.
13
Sidetone:
A switched “sidetone” from the microphone inputs made available for mixing externally with
the “Ear” audio. See Figure 3.
14
V
SS
:
Negative supply rail. Signal ground.
TX Mix:
The output of the TX Mix Amplifier. Used with external components, it allows the TX Filter
Out output to mix with externally generated signalling tones prior to the final level adjustment.
15
16
SAT Out:
The output of the SAT Bandpass filter. This level is recovered from the input RX audio and
is available for mixing externally with the transmitter modulation. See Figure 3.
17
TX Mix In:
The input to the TX Mix Amplifier. Used with external components, it allows the TX Filter
Out output to mix with externally generated signalling tones prior to the final level adjustment. The
recovered SAT signal may be introduced at this point. See Figures 2 and 3.
18
TX Filter Out:
The output of the Deviation Limiter/Lowpass Filter stage. This stage can be by-passed
using SW3 (Configuration Command). See Figure 3.
19
No internal connection – Leave open circuit.
20
Dev
iation
Limiter In:
Input to the on-chip deviation limiter. This input should be a.c. coupled to the
Pre-Emphasis Out pin. The a.c. coupling will achieve maximum possible symmetry of limiting as this
input has a 1M
internal resistor to V
BIAS
. See Figure 2.
21
Pre-Emphasis Out:
Audio output from the TX Gain/Pre-Emphasis function. This output should be
a.c. coupled to the Deviation Limiter In pin. See Figures 2 & 3.
22
DTMF In:
To introduce DTMF type audio, at a suitable level for transmission, to the TX Path,
controlled by SW2 (Configuration Command (10
H
)). This input has an internal 1M
resistor to V
BIAS
and should be connected via a capacitor.
23
Comp
ression
In:
The audio input from an external compression system. This input has an internal
1M
resistor to V
BIAS
and should be connected via a capacitor.
24
Comp
ression
:
The output to an external audio compression system. Currently available compressor/
expanders have Op-Amps incorporated. The compressor can be by-passed by SW2.
25
Mic.2 In:
26
Mic.1 In:
27
Play In:
The input via SW2 from a voice storage device such as the MX812. This “replayed” audio
can be sent to RX or TX paths allowing a Messaging/Voice Notepad/Answering facility. This input has
an internal 1M
resistor to V
BIAS
and should be connected via a capacitor.
28
V
:
Positive supply rail. A single +5-volt power supply is required. Levels and voltages within this
Audio Processor are dependent upon this supply.
C-BUS
is MX-COM’s proprietary standard for the transmission of commands and data between a
μController and the relevant Cellular microcircuits. It may be used with any
μ
Controller, and can, if
desired, ake advantage of he hardware serial /O unctions embodied nto many types of
μ
Controller.
The “C-BUS” data rate is determined solely by the
μ
Controller.
Pin
Function
TX voice (Mic.) inputs, selectable by SW1 available for handsfree mic./handset mic. or
any TX audio input. Pre-amplification may be required at these inputs. These inputs
each have an internal 1M
resistor to V
BIAS
and should be connected via a capacitor.
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