參數(shù)資料
型號(hào): AD721
廠商: Analog Devices, Inc.
英文描述: RGB to NTSC/PAL Encoders(RGB-NTSC/PAL 編碼器)
中文描述: RGB到的NTSC / PAL編碼器(RGB-NTSC/PAL編碼器)
文件頁(yè)數(shù): 4/8頁(yè)
文件大?。?/td> 146K
代理商: AD721
75
75
TEKTRONIX TSG 300
COMPONENT VIDEO
WAVEFORM GENERATOR
AD720/AD721
RGB TO NTSC/PAL
ENCODER
SONY
MONITOR
MODEL 1342
TEKTRONIX 1910
COMPOSITE VIDEO
WAVEFORM GENERATOR
GENLOCK
RGB
3
COMPOSITE
SYNC
FSC
4FSC
PIXEL-CLOCK
GENERATOR
COMPOSITE VIDEO
TEKTRONIX VM700A
WAVEFORM MONITOR
Figure 1. AD720/AD721 Evaluation Setup
0.10
0.05
0.00
–0.05
–0.10
0.00
–0.04
0.00
–0.01
–0.04
–0.10
0.10
0.05
0.00
–0.05
–0.10
0.00
0.05
0.05
0.04
0.07
0.01
1ST
2ND
3RD
4TH
5TH
6TH
DG DP(NTSC) (SYNC = EXT)
FIELD = 1 LINE = 21
DIFFERENTIAL GAIN (%) MIN = –0.10; MAX = 0.00; p-p/MAX = 0.10
DIFFERENTIAL PHASE (
°
) MIN = 0.00; MAX = 0.07; p-p = 0.07
Figure 2. Composite Output Differential Phase and Gain,
NTSC (Nulled to Chroma Output)
100.0
0.0
0.0
50.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.5
NOISE REDUCTION: 15.05dB
APL = 49.6%
525 LINE NTSC; NO FILTERING
SLOW CLAMP TO 0.00V AT 6.63
μ
s
SYNC = SOURCE
FRAMES SELECTED: 1 2
MICROSECONDS/PRECISION MODE OFF
VOLTS
IRE:FLT
Figure 3. Modulated Pulse and Bar, NTSC
0.0
0.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
MICROSECONDS
FRAMES SELECTED: 1 2; APL = 45.8%
525 LINE NTSC; NO FILTERING
SLOW CLAMP TO 0.00V AT 6.63
μ
s
PRECISION MODE OFF
SYNC = SOURCE
100.0
0.0
50.0
0.5
VOLTS
IRE:FLT
Figure 4. 100% Color Bars, NTSC
0.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
MICROSECONDS
FRAMES SELECTED: 1 2; APL = 11.3%
525 LINE NTSC; NO FILTERING
SLOW CLAMP TO 0.00V AT 6.63
μ
s
PRECISION MODE OFF
SYNC = SOURCE
100.0
0.0
50.0
0.5
VOLTS
IRE:FLT
Figure 5. Multipulse, NTSC
5.35
μ
s
4.82
μ
s
8.0
CYCLES
39.4 IRE
85ns
73ns
H TIMING MEASUREMENT RS-170A (NTSC)
FIELD = 1 LINE = 22
39.2 IRE
AVERAGE 32 TO 32
Figure 6. Horizontal Timing, NTSC
4.82
μ
s
1.98
μ
s
292.1mV
81ns
AVERAGE 32 TO 32
302.2mV
H TIMING (PAL)
LINE = 17
82ns
5.52
μ
s
Figure 7. Horizontal Timing, PAL
AD720/AD721–Typical Characteristics
–4–
REV. 0
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