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參數(shù)資料
| 型號(hào)： | M52721SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | WIDEBAND VIDEO PREAMPLIFIER WITH OSD MIX |
| 中文描述： | 帶OSD寬頻帶混合視頻前置放大器 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大?。?/td> | 75K |
| 代理商： | M52721SP |
MITSUBISHI ICs (Monitor)
M52721SP
WIDEBAND VIDEO PREAMPLIFIER WITH OSD MIX
3
ELECTRICAL CHARACTERISTICS TEST METHOD
I
CC
Circuit current
When there is no signal, fix SWA on side “a”, and measure I
using ampere meter A.
CC
,
V
Input SG8 to pin 5, and set V11 at 0.5V
omax
Output dynamic range
Gradually increase the amplitude of SG8 from 700mV, and
measure the amplitude of the TP16 output waveform when the
upper side of the waveform becomes distorted.
V
From the condition in Vomax above, change V7 to 2.5V, gradually
increase the amplitude of SG8 from 700mV
signal amplitude when the output signal starts to be distorted.
imax
Maximum allowable input
P-P
, and read the input
Gv Maximum gain
Read the amplitude of TP16 output: it should be taken as V
The maximum gain G
V
is determined by:
0
.
V
Set V7 at 2.5V, and read the amplitude of TP16 output: it should be
taken as V
01
.
CR1
Contrast control characteristics 1
V
Set V7 at 1.0V, and read the amplitude of TP16 output: it should be
taken as V
02
.
CR2
Contrast control characteristics 2
V
Set brightness (V11) at 1.0V, and measure the output of TP16 with
a voltmeter. This value is V
B1
.
B1
Brightness control characteristics 1
V
Set brightness (V11) at 2.0V, and measure the output of TP16 with
a voltmeter. This value is V
B2
.
B2
Brightness control characteristics 2
V
Set brightness (V11) at 3.0V, and measure the output of TP16 with
a voltmeter. This value is V
B3
.
B3
Brightness control characteristics 3
F
F
With zero resistance between pins 13 and 16, apply a DC voltage to
pin 5 so that the bottom of the input waveform reaches 2.6V. Next,
apply a DC voltage to pin 8 so that the bottom of the output
waveform reaches 2.4V.
Input SG1 and measure the amplitude of TP16 output (V
Input SG2 and measure the amplitude of TP16 output (V
Input SG3 and measure the amplitude of TP16 output (V
F
1-a
and F
2-a
are determined by:
1-a
Frequency characteristics 1-a
Frequency characteristics 2-a f=200MHz
f=100MHz
2-a
01
).
).
).
02
03
T
T
1. Measure the rise time T
of the input pulse with an active probe.
2. Next, measure the rise time T
90% of the output pulse with an active probe.
r
Pulse characteristics (rise time)
Pulse characteristics (fall time)
f
r1
and fall time T
f1
between 10 and 90%
r2
and fall time T
f2
between 10 and
V
While monitoring the output (approx. 2.4V
pulse width gradually and measure the SG6 amplitude when the
output reaches 2.4V or more.
10th
Clamp pulse threshold voltage
DC
), decrease the SG6
W
While monitoring the output (approx. 2.4V
amplitude gradually and measure the SG6 pulse width when the
output becomes 2.4V or more.
10
Clamp pulse minimum width
DC
), decrease the SG6
OT
OT
Measure the OSD rise time T
90% of the output pulse with an active probe.
r
OSD pulse characteristics (rise time)
OSD pulse characteristics (fall time)
f
r
and OSD fall time T
f
between 10 and
V
19th
OSD input threshold voltage
While monitoring the output, decrease the SG7 amplitude gradually
and measure the SG7 amplitude when the output reaches 0V.
TP16 OUTPUT WAVEFORM
0.0
9.0
(V)
V
0
[V
P-P
]
0.7 [V
P-P
]
[dB]
G
V
=20LOG
V
01
[V
P-P
]
0.7 [V
P-P
]
[dB]
V
CR1
=20LOG
V
02
[V
P-P
]
0.7 [V
P-P
]
[dB]
V
CR2
=20LOG
V
02
[V
P-P
]
V
01
[V
P-P
]
[dB]
F
1-a
=20LOG
V
03
[V
P-P
]
V
01
[V
P-P
]
[dB]
F
2-a
=20LOG
T
r
(nsec)= (T
r2
)
2
-(T
r1
)
2
T
f
(nsec)= (T
f2
)
2
-(T
f1
)
2
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