NJM2549
Test Circuit 7 for RSSI Response
V+
AF OUT
Oscilloscope
T1
R2
C6
82p
C7
0.01u
C4
100p
2.4k
C5
3p
10
9
8
7
6
QUAD
DET
IF AMP
RSSI
1
2
3
4
5
C1
C2
C3
0.01u
0.01u
0.01u
C9
10u
C8
0.01u
R1
51
Zo=50
Signal ON to OFF
OFF to ON
IF IN
Test Circuit 8 for Demodulated signal (LPF is connected)
1
Ca
3300p
fc=
Hz
2 π 3
RaRbRcCaCbCc
Ra
68k
Rb
68k
Rc
68k
Audio Analyzer
Input impedance = 100kΩ
LPF = 30kHz
-
+
AF OUT
V+
Cb
330p
Cc
1000p
RSSI OUT
V
T1
R2
2.4k
C6
82p
C7
0.01u
C4
100p
C5
3p
10
9
8
7
6
QUAD
DET
IF AMP
RSSI
1
2
3
4
5
C1
C2
C3
0.01u
0.01u
0.01u
C9
10u
C8
0.01u
R1
51
Zo=50
IF IN
T1:4CJH(Sample No.:080293006)
SAGAMI ELEC CO., LTD. (Japan)
Ver.2010-06-24
- 7 -
NJRC [ NEW JAPAN RADIO ]
