參數(shù)資料
型號(hào)： BH7775K
廠商： Rohm CO.,LTD.
英文描述： VCR audio signal processing system
中文描述： 錄像機(jī)音頻信號(hào)處理系統(tǒng)
文件頁(yè)數(shù)： 12/17頁(yè)
文件大?。?/td> 226K
代理商： BH7775K
12
Video ICs
BH7775K
PB mode: Input FM PB IN = 660mV
P-P
, f = 1.30MHz, 1.70MHz 1: 1 MIX, after BPF center frequency adjustment. Inpu
DEV = DEV
L,R
(frequency deviation given above). EE / PB line out level difference.
EE mode: V
IN
= – 10.0dBV after carrier
frequency adjustment.
Demedulation output
level
Demedulation output
level 2
Demedulation distortion
Demedulation SW
noise level
Demedulation noise
level
Line output recording /
playback level
difference
DEV
L
=
±
50.0kHz, f = 10kHz
DEV
R
=
±
50.0kHz, f = 10kHz
DEV
L
=
±
50.0kHz, f = 1kHz
DEV
R
=
±
50.0kHz, f = 1kHz
DEV
L
=
±
50.0kHz, f = 1kHz,
1
DEV
R
=
±
50.0kHz, f = 1kHz,
1
f = 10kHz, AUDIO H. SW. P = – Hz
5V
P-P
rectangular-waveform input. After
10kHz TRAP passes DEV. =
±
25.0kHz
2
Unmodulated
2
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
V
ODL2
V
ODR2
V
ODR
– 10.0
V
ODR
– 7.5
V
ODR
– 5.0
dBV
V
ODL
– 10.0
V
ODL
– 7.5
V
ODL
– 5.0
dBV
(INPUT: TUNER IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R, OUTPUT: FM REC OUT L / R)
V
RPR
– 1.2
+ 1.2
dB
0.0
V
RPL
Rch
Lch
– 1.2
+ 1.2
dB
0.0
f
NOL
Lch
1.2950
1.3050
MHz
1.3000
f
NOR
Rch
1.6950
1.7050
MHz
1.7000
f
POL
Lch
1.3945
1.4055
MHz
1.4000
f
POR
Rch
1.7935
1.8045
MHz
1.7990
DEV
L
45.5
57.5
±
kHz
51.5
DEV
R
45.0
57.0
±
kHz
51.0
DEV
Max.
L
116
160
±
kHz
138
DEV
Max.
R
116
160
±
kHz
138
V
OFML
320
420
mV
P-P
365
V
OFMR
Lch
Rch
Lch
Rch
Lch
Rch
325
425
mV
P-P
370
f
2L
—
– 40.0
dB
– 53.0
f
2R
—
– 40.0
dB
– 48.0
f
3L
—
– 40.0
dB
– 52.0
f
3R
Lch
Rch
Lch
Rch
—
– 42.0
dB
– 55.0
f
LR
– 12.0
– 8.4
dB
– 10.2
V
ODL
– 11.5
– 7.1
dBV
– 9.3
V
ODR
– 11.5
– 7.1
dBV
– 9.3
THD
DL
—
0.35
%
0.12
THD
DR
Lch
Rch
Lch
Rch
Lch
Rch
—
0.35
%
0.13
V
ODSWL
—
—
dBV
—
V
ODSWR
—
—
dBV
—
V
ONDL
—
– 85.0
dBV
– 95.0
V
ONDR
Lch
Rch
Lch
Rch
—
– 85.0
dBV
– 95.0
Carrier frequency
NTSC
Carrier frequency
PAL
Frequency deviation
Maximum frequency
deviation
FM output level
Carrier 2nd harmonic
Carrier 3rd harmonic
FM MIX ratio (FM MIX1 mode)
No input, V
CC
stable, after automatic adjustment
f
SC
= 3.579545MHz
V
IN
= 150 ~ 500mV
P-P
No input, V
CC
stable, after automatic adjustment
f
SC
= 4.433619MHz
V
IN
= 150 ~ 500mV
P-P
FM OUT SW: FM L mode
FM OUT SW: FM R mode
2nd stage harmonics and fundamental harmonics
spectral ratio Lch: FM L mode, Rch: FM R mode
3rd stage harmonics and fundamental harmonics
spectral ratio Lch: FM L mode, Rch: FM R mode
Input condition 1
Input condition 4 (f = 10kHz)
1.3MHz / 1.7MHz spectrum ratio.
[MODEM REC MODE]
[MODEM PB MODE] (INPUT: FM PB IN, OUTPUT: LINE OUT L / R)
Carrier frequency, after BPF fo adjustment, V
IN
= 660mV
P-P
, 1.30MHz, 1.70MHz MIX IN
[Recording
→
playback total characteristics] (EE · · · INPUT: LINE IN L / R, OUTPUT: LINE OUT L / R)
(PB · · · INPUT: FM PB IN, OUTPUT: LINE OUT L / R)
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