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AMPS/NAMPS System Audio Processor.
MX826 Preliminary Information
© 1997 MX
•COM Inc.
www.mxcom.com
Tele: 800 638-5577
910 744-5050
Fax: 910 744-5054
Doc. # 20480070.004
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
Characteristics
See Note
Min.
Typ.
Max.
Unit
Control Interface Parameters
Input Logic Levels
Logic “1”
1
3.5
–
–
V
Logic “0”
1
–
–
1.5
V
I
IN (logic “1” or “0”)
1
-1.0
–
1.0
µA
Input Capacitance
1
–
–
7.5
pF
Channel Performances
TX Path
Filter Specifications
Pre-Compression L/HPF Combination
Passband
300
3000
Hz
Slope - below 300Hz
+24.0
–
–
dB/oct.
above 3000Hz
-24.0
–
–
dB/oct.
TX Gain Pre-Emphasis
Gain at 1.0kHz
–
0
–
dB
Slope (300Hz - 3000Hz)
–
6.0
–
dB/oct.
Post Deviation Limiter LPF
Attenuation Relative to 1.0kHz
3.0kHz - 5.9kHz
-
40 log(f/3000)
-
dB
5.9kHz - 6.1kHz
-
35.0
-
dB
6.1kHz - 15kHz
-
40 log(f/3000)
-
dB
>15kHz
-
28.0
-
dB
Analog Signal Input Levels
Mic. 1 and 2
2
–
0
–
dB
Play
2
–
0
–
dB
DTMF
2
–
0
–
dB
Comp. In
2
–
0
–
dB
TX Mix In
2
–
0
–
dB
Analog Signal Output Levels
Pre-Emp Out
2
–
0
–
dB
TX Filter Out
2
–
0
–
dB
TX Mod Out
2
–
0
–
dB
Sidetone Out
2
–
0
–
dB
Path Gains/Levels
TX Gain – 11
H
Nominal Adjustment Range
-2.65
–
3.65
dB
Error of any Setting
-0.2
–
0.2
dB
Dev Limiter
Threshold
–
1086
–
mVp-p
Symmetry
–
7.0
–
%
Mod Level Attenuation – 11
H
Nominal Adjustment Range
-5.6
0
dB
Step Size
0.2
0.4
0.6
dB
Error of any Setting
-1.0
–
1.0
dB
Overall
TX Distortion
–
-40.0
-32.0
dBp
TX Hum and Noise
–
-40.0
-20.0
dB
RX Signal Path
Filter Specifications
RX Gain De-Emphasis
Gain at 1.0kHz
–
3.75
–
dB
Slope (300Hz - 3000Hz)
–
-6.0
–
dB/oct.
RX Channel Bandpass
300
3000
Hz
Slope - below 300Hz
+24.0
–
–
dB/oct.
above 3000Hz
-36.0
–
–
dB/oct.
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