CDBM455C28 Datasheet, PDF (2/4 Pages) Shenzhen Luguang Electronic Technology Co., Ltd – Ceramic Discriminator

CDBM455C28
Ceramic Discriminator
5. MAXIMUM RATINGS
5.1 Withstanding Voltage
D.C. 5OV. 1 minute
(Betwccn cach terminal)
5.2 Insulation Resistance
100 MΩ min. at D.C.100V
(Between each terminal)
5.3 Input signal level
5dB (50Ω Termination)
5.4 Operating Temperature Range
-20 ℃ to +80 ℃
5.5 Storage Temperature Range
6. ELECTRICAL CHARACTERISTICS
-40 ℃ to +80 ℃
( 0℃ to + 40 ℃ )
Item
Requirements
Recoverd Audio 3dB Bandwitdth
6-1
(from 455KHz)
±4.0 KHz min
6-2 Recoverd Audio Output Voltage
(at 455KHz)
40 ± 20 mV
6-3
Distortion(at 455KHz)
3.0% max
6-4
Withstanding Voltage
50V D.C. for 1 inute
6-5 Test Method
Input signal Condition Input level
: 80dBμ
Frequency Deviation : ±4.0KHz
Modulation Frequency : 1 KHz
1) Recoverd Audio
3dB Bandwidth
Input the above signal and sweep the carrier frequcncy
around 455KHz and find out the maximum audio
output frequcncy. Then sweep the carrier frequency
again and find two frequencies which are obscrvcd
-3dB attenuation points from the maximum point.
Higher frequency point is called (f1) and lowcr called
(f2), (f1-455KHZ)is defined as upper 3dB bandwidth
and (455KHz-f2) defined as upper 3dB bandwidth.
2) Recoverd Audio Recoverd audio output voltage shall be measured
Output Voltage when carrier frequency is adjusted to 455KHz.
3) Distortion
Carrier frequency is adjusted to 455KHz. And
then, distorion shall be measured with 1 KHz
modulation frequency.
6-6 Test Circuit
It is shown in fig 1
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD.