FX828 Datasheet, PDF (29/34 Pages) CML Microcircuits – CTCSS/DCS/SELCALL Processor

CTCSS/DCS/SELCALL Processor
FX828
Notes Min. Typ.
CTCSS Detector - Fast Detect
Sensitivity
(Pure CTCSS Tone) 5
-
-26.0
Response Time
(Composite Signal)
-
56.0
Frequency Range
60.0
-
CTCSS Detector - Fast Predictive
Sensitivity
(Pure CTCSS Tone) 5
Response Time
(Composite Signal)
7
Frequency Range
Decode Bandwidth
-
-26.0
-
37.0
60.0
-
-
40.0
CTCSS Encoder
Frequency Range
Tone Frequency Resolution
Tone Amplitude Tolerance
Total Harmonic Distortion
60.0
-
-
-
1
-1.0
-
9
-
2.0
SELCALL Encoder
Frequency Range
Tone Frequency Resolution
Tone Amplitude Tolerance
Total Harmonic Distortion
208
-
-
-
1
-1.0
-
9
-
2.0
DCS Encoder
Bit Rate
Amplitude Tolerance
Amplitude
- 134.4
1
-1.0
-
1
871
Audio Band-Pass Filter
Passband
Passband Gain (at 1.0kHz)
Passband Ripple (w.r.t. gain at 1.0kHz)
Stopband Attenuation
Residual Hum and Noise
Alias Frequency
8
300
-
8
-
0
8
-2
-
8
33.0
-
-
-50.0
-
63
Output Impedances
TX AUDIO OUT, TX SUB AUDIO ) Enabled
10
-
2.0
OUT and RX AUDIO OUT
) Disabled
-
500
Rx Amp and Summing Amp
Open Loop Gain
(I/P = 1mV at 100Hz)
Unity Gain Bandwidth
Input Impedance
(at 100Hz)
Output Impedance
(Open Loop)
-
70.0
-
5.0
10
-
-
6.0
Max.
-
-
253
-
-
253
-
253
0.2
+1.0
-
3000
0.2
+1.0
-
-
+1.0
3000
-
+0.5
-
-
-
-
-
-
-
-
-
Units
dB
ms
Hz
dB
ms
Hz
Hz
Hz
%
dB
%
Hz
%
dB
%
bits/s
dB
mVp-p
Hz
dB
dB
dB
dBp
kHz
kΩ
kΩ
dB
MHz
MΩ
kΩ
© 2009 CML Microsystems Plc
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D/828/4