OPERATION GUIDE
.
OG_CDP-RX-07M_v20e Circuit Design, Inc.
8
BLOCK DIAGRAM
Monolithic
Surface Acoustic
Crystal Filter
FM IF-IC:
ANT
Wave Filter
(21.7MHz±7.5KHz)
(2nd-Mix/IF-Amp/Quad detector)
(RF-In)
Filter
(LC)
Lo-In Mix-Out
Mix-In
2nd-Local
Active Filter
Data Slicer
21.25MHz
(2.4KHz)
& Buffer
1st-Local
Ceramic Filter
F0-21.7MHz
(450KHz)
Buffer
VCO
3
～
14V
In
Out
Filter
(LC)
In
Out
Loop Filter
Lo active
(LC)
21.25MHz
Internal
J1
J2
(TCXO)
Jumper
（
Ch select)
S1/S2/MODE
：
CDP-RX-07MP only.
S2
S1
SPI
LD
MODE
GND
Regulator
GND
CTRL
Internal Clock
Vcc
1st-Mixer
PLL Synthesizer
IF-In
DO
OSC-Out
Voltage
Amp
MCF
SAW
Voltage
2.7V (Other)
2.7V (VCO & Buffer)
Regulator
RSSI
AF
DATA
RSSI
AF-Out
OSC-In
FIN
Typ. 8MHz)
1Chip CPU
(Flash memory/
FET-
SW
