84
TH-D72A/D72E
LEVEL DIAGRAM
ANT
SW
BPF
BPF
MCF
IC353
FM IC
D215,216
D219,221
Q11
Q7
Q2
CF
A Band
AF
16
16
9
9
1st Local
ANT
XF351
1st Local
1st Local
–60dBm
–72.5dBm
–52.5dBm
–46dBm
ANT
SW
BPF
BPF
D217
D220,222
Q10
Q6
Q3
–68dBm
–51dBm
–50dBm
BPF
BPF
VCO
B
TCXO
(B)
Q9
Q5
Q1
–67dBm
–53.5dBm
8mVrms
24mVrms
3.2Vp-p: 1200bps
780mVrms
0.84Vp-p: 1200bps
0.5Vp-p: 9600bps
199mVrms: VHF
127mVrms: UHF
1.64Vp-p: 1200bps
0.98Vp-p: 9600bps
400mVrms: VHF
135mVrms: UHF
1.4Vp-p: 9600bps
2.3Vp-p: 1200bps
570mVrms
–53dBm
–39dBm: VHF
–42dBm: UHF
185mVrms
Center Frequency
AF (1kHz)
49.95MHz
450kHz
AF (1kHz)
BPF
BPF
MCF
IC354
FM IC
Q13
Q8
Q4
CF
B Band
AF
1st Local
XF352
–71dBm
–56dBm
–51.5dBm
–48dBm: VHF
–45.5dBm: UHF
175mVrms
45.05MHz
455kHz
A Band VHF Receiver circuit
B Band VHF Receiver circuit
A Band UHF Receiver circuit
B Band UHF Receiver circuit
IC352
Multi
SW
7
1
MIC
IC712
MIC
AMP
IC714
2/2
MIC
AGC
IC716
IDC &
SPL
filter
2
7
1
3
6
3
7
2
5
3
4
7
2
IC721
E VR
R532
X511
C
C
RF
CN715
29
35
1
2
IC728
TNC
ASIC
2.4Vp-p: 1200bps
3.3Vp-p: 1200bps
2.8Vp-p: 9600bps
3.3Vp-p: 9600bps
IC735
SW
RF
CONT
Receiver Section
Transmitter Section
Not
Not
Not
Not
Not
Not
Not
Note1: The RF levels for each point, are at 1000pF wit
When the –60dBm standard signal generator b
Note2: The AF levels were measured with an oscillosc
a 3kHz deviation was input and the AF output
Note3: This is the value measured with an oscilloscop
1200bps
:
1kHz MOD
,
3kHz DEV.
9600bps
: 1k
Hz MOD
,
2kHz DEV.