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Specifications
1780R-Series Operator’s Manual
5–13
Table 5–6: Synchronization
Characteristics
Performance
Requirements
Supplemental
Information
Sync Input
Internal
Ref. Sync
Separator
0.2 to 2.0 V peak-to-peak
composite video.
Composite video applied to
Inputs A, B1, B2, or B3 or
probe.
Int. Sync
Separator
0.5 to 2.0 V peak-to-peak
composite video.
External
Black Burst –14 dB to +6 dB. Black Burst signal of 0.2 to
5 times amplitude applied
to EXT SYNC input.
Composite Sync 0.2 to 8.0 V peak-to-peak. Composite sync applied to
EXT SYNC input locks
waveform monitor; vector-
scope also requires CW
signal.
SCH Modes 286 mV (300 mV PAL) Sync
and Burst ±3 dB.
Composite Video or Black
Burst.
Direct Sync
Horiz. Freq. Range 15.75 kHz ±1 kHz. Frequencies much below
15.75 kHz will not permit a
normal TV display.
Sync Jitter
Comp sync or
video
≤12 ns with respect to input
sync.
Variable APL
(10–90%)
≤20 ns; with the addition of
36 dB white noise ≤90 ns.
Noise Immunity <250 ns jitter, 1 V compos-
ite video with –26 dB white
noise.
Specifications
1780R-Series Operator’s Manual
5–13
Table 5–6: Synchronization
Characteristics
Performance
Requirements
Supplemental
Information
Sync Input
Internal
Ref. Sync
Separator
0.2 to 2.0 V peak-to-peak
composite video.
Composite video applied to
Inputs A, B1, B2, or B3 or
probe.
Int. Sync
Separator
0.5 to 2.0 V peak-to-peak
composite video.
External
Black Burst –14 dB to +6 dB. Black Burst signal of 0.2 to
5 times amplitude applied
to EXT SYNC input.
Composite Sync 0.2 to 8.0 V peak-to-peak. Composite sync applied to
EXT SYNC input locks
waveform monitor; vector-
scope also requires CW
signal.
SCH Modes 286 mV (300 mV PAL) Sync
and Burst ±3 dB.
Composite Video or Black
Burst.
Direct Sync
Horiz. Freq. Range 15.75 kHz ±1 kHz. Frequencies much below
15.75 kHz will not permit a
normal TV display.
Sync Jitter
Comp sync or
video
≤12 ns with respect to input
sync.
Variable APL
(10–90%)
≤20 ns; with the addition of
36 dB white noise ≤90 ns.
Noise Immunity <250 ns jitter, 1 V compos-
ite video with –26 dB white
noise.