Atec Tektronix-VM700T Manual de usuario descargar pdf (Pagina 8)

MEASURE MODE (continued)

NOISE SPECTRUM

easurement Range Absolute Mode Accuracy

nweighted Signal-to-Noise Ratio –20 to –80 dB ±0.4 dB

(

5 MHz Low Pass) (–20 to –60 dB)

1.0 dB

(–60 to –70 dB)

Weighted Signal-to-Noise Ratio –20 to –80 dB ±1.0 dB

(5 MHz Low Pass and (–20 to –0 dB)

nified Weighting) ±2.0 dB

(

–60 to –70 dB)

Noise Spectrum measurement.

VITS ID display.

VERTICAL BLANKING

Measurement Range Absolute Mode Accuracy

Equalizing Pulse Width 80 ns to 1 µs ±10 ns

Serration Pulse Width 80 ns to 1 µs ±10 ns

Vertical Blanking display.

Vertical Blanking Serration Pulse measurement.

SCH PHASE

Measurement Range Absolute Mode Accuracy

SCH Phase ±90 deg ±5 deg

Sync Timing ±1 µS ±10 nS

Burst Timing ±180 deg ±5 deg

SCH Phase measur

ement.

Amplitude (0 dB = 714 mV p-p)Amplitude (0 dB = 714 mV p-p)

(MHz)(MHz)

-85.0

-80.0

-75.0

-70.0

-65.0

-60.0

-55.0

-50.0

-45.0

-40.0

-35.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

5.0

10.0

1.0 2.0 3.0 4.0 5.0

-85.0

-80.0

-75.0

-70.0

-65.0

-60.0

-55.0

-50.0

-45.0

-40.0

-35.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

5.0

10.0

1.0 2.0 3.0 4.0 5.0

Noise Spectrum (NTSC) Wfm --> Noise Spectrum (NTSC) Wfm --> Pedestal

2 -> 32

Cursor1 0.81 MHz(+-28 kHz Band) -52.3 dB p-p

Cursor2 4.50 MHz(3.69 MHz above) -60.7 dB p-p ( -8.4 dB Diff)

Noise Area in Cursors -50.2 dB rms

Noise Level = -49.1 dB rms

Band width 10kHz to Full Band width 10kHz to Full

Field = 2 Line = 13 Field = 2 Line = 13

verage

Source

Only

Source

Only

Source and

Chan. A

Source and

Chan. A

Source and

Chan. B

Source and

Chan. B

180

170

160

150

140

130

120

100

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

-110

-120

-130

-140

-150

-160

-170

CH Phase Measurement

25 line NTSC

h B SCH -62.1 deg

Ch A SCH -61.0 deg

el Burst 24.3 deg

Rel Sync -17 nsec

Color Frame Derived

from Channel A SCH

Sync Relative Timing (nsec)

1000-1000 100-100 10-10 0

Burst Relative Phase (deg)

180-180 30-30 10-10 3-3 0

Average Off

Field 1Field 1 Field 2Field 2

VITS Identification (NTSC) VITS Identification (NTSC)

Line 15 --> Chroma Freq Resp Line 15 --> Chroma Freq Resp

>> Line 16 --> NTC-7 Combination Line 16 --> NTC-7 Combination >>

Line 17 --> FCC Multi Burst Line 17 --> FCC Multi Burst

Line 18 --> FCC Composite Line 18 --> FCC Composite

Line 19 --> VIRS Line 19 --> VIRS

Line 20 --> Pedestal Line 20 --> Pedestal

Line 15 --> Sin X/X Line 15 --> Sin X/X

>> Line 16 --> Pedestal Line 16 --> Pedestal >>

Line 17 --> Luminance Bar Line 17 --> Luminance Bar

Line 18 --> NTC-7 Composite Line 18 --> NTC-7 Composite

Line 19 --> VIRS Line 19 --> VIRS

Line 20 --> Pedestal Line 20 --> Pedestal

Field = 1 Line = 16 NTC-7 Combination

Full DisplayFull Display

F1F1

Vertical Blanking (NTSC) Vertical Blanking (NTSC)

Field = 1 Line = 16 Field = 1 Line = 16 Field = 1 Line = 16 Field = 1 Line = 16

Blanking

Display

Blanking

Display

Equalizer

Pulse

Equalizer

Pulse

Serration

Pulse

Serration

Pulse

V Sync

Display

V Sync

Display

Average

Num 32

Average

Num 32

RescaleRescale

Timing DisplayTiming Display

Vertical Blanking (NTSC) Vertical Blanking (NTSC)

4.78 u sec

4.58 u sec

193 n sec

208 n sec

Average Off Average Off

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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Atec Tektronix-VM700T Manual de usuario Pagina 8

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