Sub-Audio Signaling Processor
Page 20 of 24
MX805A
Notes
Min.
Typ.
Max.
Units
Overall Performance
CTCSS - Decode
dB
kHz
dB
Sensitivity (Composite Signal)
Response Time (Composite Signal)
100Hz to 257Hz Tone
65Hz Tone
Tone Measurement Resolution
Tone Measurement Accuracy
NoTone Response Time (Composite Signal)
False tone Interrupts (Noise Input Only)
CTCSS Encode
6
9
-20.0
-26.0
210.0
210.0
0.2
250.0
384.0
ms
ms
%
%
ms
/Hr
-0.5
0.5
250.0
7
10
175.0
20.0
Frequency Range
65.0
-1.0
257.0
0.2
1.0
30.0
50.0
5.0
Hz
%
dB
ms
ms
%
Tone Frequency Resolution
Tone Amplitude Tolerance
Rise Time (to 90%)
Fall Time (to 10%)
Total Harmonic Distortion
NRX – Decode
RX Bit Rate Sync Time
RX Bit Error Rate
12
11
2
edge
(ERROR)
1 x 10-3
P
NRZ – TX
TX Bit Rate
67.0
75.0
300.0
300.0
bits/sec
Hz
TX LPF (3dB) Bandwidth
Sub-Audio TX Output Level
CTCSS
0
dB
NRZ
0.871
V
P-P
Amplitude Adjustment Range
Adjustment Step Size (7 Steps)
Sub-Audio Bandstop Filter
Passband
Passband Gain (@ 1.0kHz)
Passband Ripple (with respect to gain @ 1.0Hz)
Stopband Gain < 250Hz
Residual Hum and Noise
Alias Frequency
-2.58
2.58
dB
dB
8
0.86
300.0
3000.0
0.5
Hz
dB
dB
dB
dB
0
-1.5
36.0
-50.0
-45.7
62.5
kHz
Receive Lowpass Filter (See Figure 9)
Cutoff Frequency (-3dB)
Passband Gain
280.0
6.0
Hz
dB
Xtal/Clock Frequency (f
)
4.0
6.1
MHz
XTAL
Table 13: Operating Characteristics
ã2001 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480116.006
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