Signaling Circuit; Encode; Decode - Kenwood NX-5400 Service Manual
700/800mhz digital transceiver
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Also See for NX-5400:
- Common function reference (476 pages) ,
- Function reference (190 pages) ,
- User manual (80 pages)
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5UC
SBC
ANTSW
SBC
TX
RX
TXC
RXC
SBC
F2
(1A)
2.4.8 Signaling Circuit
2.4.8.1
Encode (QT/DQT/DTMF/2-tone/MSK)
Each signaling data signal of QT, DQT, DTMF, 2-tone and MSK is generated by IC702, superposed on a modulation signal and is sent
to TX VCO and TX PLL IC.
2.4.8.2
Decode (QT/DQT/DTMF/2-tone/MSK)
The audio signal is removed from the FM detection signal sent to the IC702 and the resulting signal is decoded by IC702.
1-16 (No.RA016<Rev.001>)
IC82
50A
IC801
50U
IC36
50C
IC60
200C
IC360
SW
IC63
50VCO
Q110
SW
Q210
SW
IC65
50T
IC64
50R
Q32
SB2
Q71
53AF
Fig.4 Power supply circuit
KEY Back Light, 3Color LED,
8bit/16ch ADC, Universal I/F
Universal Option
PLL, IF, VCO
ASSIST
ANTSW
TX VCO
RX VCO
TX circuit
RX circuit
8bit ADC
Int AF Amp
Ext AF Amp
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