Atec Tektronix-VM700T - Manual (Page 8)

MEASURE MODE (continued)
NOISE SPECTRUM
Measurement Range Absolute Mode Accuracy
Unweighted 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)
Unified Weighting) ±2.0 dB
(–60 to –70 dB)
Noise Spectrum measurement.
T
U
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
V
Vertical Blanking display.
W
Vertical Blanking Serration Pulse measurement.
X
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 measurement.
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
32 -> 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
Average Average
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
110
100 90 80
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80 -90 -100
-110
-120
-130
-140
-150
-160
-170
SCH Phase Measurement SCH Phase Measurement 525 line NTSC 525 line NTSC Ch B SCH -62.1 deg
Ch A SCH -61.0 deg
Rel 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 1 Field 1 Field 2 Field 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 Display Full Display
F1 F1
F2 F2
F3 F3
F4 F4
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 Rescale Rescale
Timing Display Timing 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
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