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Specifications
1780R-Series Service Manual
1–13
Table 1–6: Synchronization (Cont.)
Characteristic
Performance
Check Step
Supplemental InformationPerformance Requirement
Jitter from missing line sync pulses <15 ns per missing sync pulse.
Maximum of 10 consecutive line
sync pulses.
Slow Sweep Triggering
Signal APL change from 10% to ≤90%. Front panel selectable for either +
or _– level change.
45
Sensitivity 0.4 V to 2.0 V peak-to-peak
composite video with APL
change.
Rate 0.2 Hz. Free runs at rates less than
0.2 Hz or with no triggering signal.
Remote Sync
Amplitude 2.0 to 5.0 V square wave, or 4.0 V
composite sync.
Input enabled through rear-panel
REMOTE connector.
46
Input Impedance 1 MW.
Frequency 30/60 Hz (NTSC), 25/50 Hz (PAL)
square wave will synchronize a
2-field sweep. Remote sync
bypasses the sync stripper and
field ID circuits.
Table 1–7: Vectorscope Vector Display
Characteristic Performance Requirement Supplemental Information
Performance
Check Step
Phase Control
Digital Phase Shifter
Phase Accuracy ±0.1_. (External CW signal.) 0.25_ Burst
Lock.
47
Resolution 0.05_.
Chrominance Bandwidth
Upper –3 dB Point F
SC
+500 kHz, ±100 kHz.
F
SC
(Su
b
ca
rr
i
er
F
re
qu
e
nc
y
)
NT C . .
48
Lower –3 dB Point F
SC
_–500 kHz, ±100 kHz.
NT
S
C
– 3
.
579545 MHz
.
PAL – 4.43361875 MHz.
Chrominance Transient Response Modulated Sin
2
pulse in R-Y
mode.