Harman Kardon HK 3490 Service Manual page 43

harman/kardon
NJL31H/31V/32H/33H/34H000A
Transmission Distance vs. Carrier Frequency
1.0
0.9
0.8
0.7
0.6
0.5
24 26 28 30 32 34 36 38 40 42 44 46 48 50
fo=36kHz
RECOMMENDED APPLICATION CIRCUIT
RC Filter should be connected closely between Vcc pin and GND pin.
- 4 -
(Vcc=3.3V, Ta=25°C)
Carrier Frequency (kHz)
fo=38KHz fo=40KHz
1 : OUT
2 : GND
3 : Vcc
47 Ω
1 2 3
Vcc
47uF
Transmission Distance vs. Temperature
(Vcc=3.3V)
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
-40 -20 0 20
Ambient temperature Ta(°C)
HK 3490/230 Service Manual
40 60 80 100
Ver.2004-08-27
Page 43 of 70