Specification-1910
Operators
Table 1-5 (cont)
Performance
Supplemental Perf. Ck.
Characteristics
Requirements
Information Step.
Nc.
Duration 4.7
/lS,
± 50 ns,
at
50% amplitude
point
Sequence
Three lines.
Period
262.5 lines Digitally determined from 14.3 MHz.
Equalizing Pulse
j
Duration 2.33/ls, ± 50 ns,
at
50%
amplitude
point
Sequence Three lines.
Burst
Rise & Fall Time 400 ns
±40
ns
Delay from Line
5.308
/lS
±
35
ns 19 cycles of subcarrier.
Half-Amplitude Duration
2.51
/lS
± 100 ns 9 cycles
of
subcarrier.
of
Envelope
Amplitude
285.7 mV
±8.57
mV
Residual Subcarrier At least 52 dB below 1V(2.5 mV) As viewed
on
a 1480 Waveform
40
(Luminance & Blanking)
Monitor
Spurious Subcarrier At least 52 dB below 1V(2.5 mV)
40
on
Outputs
Chrominance Subcarrier
Frequency
Free Running 3.579545 MHz ±
10Hz
26
Locked Mode
Locked
to
incoming burst; locked
to
the leading edge of sync if burst is
not present.
Output Impedance
75
Po
nominal
Return Loss At least
- 36
dB
to
5 MHz
53
Isolation (Front- & At least
-40
dB
35
Rear-Panel Outputs)
1-30
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