Noise Spectrum; Vertical Blanking; Sch Phase - Tektronix VM700T Product Information

MEASURE MODE (continued)

NOISE SPECTRUM

Measurement Range
Unweighted Signal-to-Noise –20 to –80 dB
(5 MHz Low Pass)
Luminance Weighted Signal-to-Noise –20 to –80 dB
(5 MHz Low Pass and
Unified Weighting)
Chrominance Weighted –20 to –80 dB
Signal-to-Noise
Noise Spectrum (Sync = B) Noise Spectrum (Sync = B)
Line = Line = 12 (SIS mode) 12 (SIS mode)
Amplitude (0 dB = 700 mV p-p) Amplitude (0 dB = 700 mV p-p)
Band width 100kHz to Band width 100kHz to Full Full
-60.0 -60.0
-62.0 -62.0
-64.0 -64.0
-66.0 -66.0
-68.0 -68.0
-70.0 -70.0
-72.0 -72.0
-74.0 -74.0
-76.0 -76.0
-78.0 -78.0
-80.0 -80.0
-82.0 -82.0
-84.0 -84.0
1.0 1.0 2.0 2.0 3.0 3.0
Cursor1 3.71 MHz(+-34 kHz Band)
Cursor2 5.58 MHz(1.87 MHz above)
Noise Area in Cursors
Average Average 32 -> 32
Noise Spectrum measurement.

SCH PHASE

Measurement Range
SCH Phase ± 90 deg
Sync Timing ± 1 µS
Burst Timing ± 180 deg
SCH Phase Measurement SCH Phase Measurement
90
80 100
70
60
50
40
30
Burst Relative Phase (deg)
20
10 -180 -30 -10 -3 0 3 10
0
Sync Relative Timing (nsec)
-10
-1000 -100 -10 0 10
-20
-30
-40
-50
-60
-70
-80 -90 -100
SCH Phase measurement.
8
Absolute Mode Accuracy
± 0.4 dB
(–20 to –60 dB)
± 1.0 dB
(–60 to –70 dB)
± 1.0 dB
(–20 to –60 dB)
± 2.0 dB
(–60 to –70 dB)
± 1.0 dB
(–20 to –60 dB)
± 2.0 dB
(–60 to –70 dB)
Wfm --> Wfm --> Pedestal
Noise Level = -66.2 dB rms
4.0 4.0 5.0 5.0 6.0 6.0
(MHz) (MHz)
-78.4 dB p-p
-79.7 dB p-p ( -1.3 dB Diff)
-72.0 dB rms
Absolute Mode Accuracy
± 5 deg
± 10 nS
± 5 deg
625 line PAL 625 line PAL Ch A SCH -3.2 deg
Ch B SCH -1.7 deg
110 Rel Burst -29.9 deg
120
Rel Sync 19 nsec
130
Color Frame Derived
140
from Channel B
150
Source Source
160
Only Only
Source and Source and
30 180 170
Chan. A Chan. A
180
Source and Source and
Chan. B Chan. B
-170
Source and Source and
100 1000
-160
Chan. C Chan. C
-150
-140
-130
-120
-110
Average 32 -> 32

VERTICAL BLANKING

Measurement
Equalizing Pulse Width
Broad Pulse Width
Vertical Blanking Field 1
Vertical Blanking Field 2
Vertical Blanking (Sync = B) Vertical Blanking (Sync = B)
Line = Line = Line = Line = 12 (SIS mode) 12 (SIS mode) 12 (SIS mode) 12 (SIS mode)
Equalizer Equalizer Broad Broad
Pulse Pulse Pulse Sep Pulse Sep
Vertical Blanking display.
Vertical Blanking (Sync = B) Vertical Blanking (Sync = B)
4.70 u sec
243 n sec
Average Off Average Off
Average Average Equalizer Equalizer Broad Broad
Num Num 32 32 Pulse Pulse Pulse Sep Pulse Sep
Vertical Blanking Serration Pulse measurement.
SCH
Range Absolute Mode Accuracy
80 ns to 1 µs ± 10 ns
80 ns to 1 µs ± 10 ns
19 to 30 lines NA
19 to 30 lines NA
Bruch Sequence OK
Full Display Full Display
Blanking Blanking V Sync V Sync
Display Display Display Display
258 n sec
Timing Display Timing Display
Blanking Blanking V Sync V Sync Rescale Rescale
Display Display Display Display
F1 F1
F2 F2
F3 F3
F4 F4