Table
1·2
GENLOCK FUNCTION
Specification-1910
Operators
Performance
Supplemental Perf. Ck.
Characteristics
Requirements
Information Step No.
Genlock Input (via PRO-
GRAM
IN
or BLACK BURST
IN)
Burst Amplitude
40 IRE
±6
dB
25
Phase Change with For 10 or less phase change
APL
over 10% to 90% APL.
Sync Amplitude
40 IRE
±6
dB
25
Return Loss
BLACK BURST
IN
At least 46
dB
to 5
MHz
53
Genlock Performance
Burst Lock
3.579545
MHz
± 20
Hz
0.00056%
If Burst Not Present Clock is referenced
to
leading edge
of sync.
Sync Lock 15.73426
kHz
± 0.079 Hz Requires unique test equipment
capable of measuring 0.079
Hz
sync frequency offset.
If Sync and Burst
Clock is referenced to
Not Present
temperature-controlled crystal
oscillator.
Oscillator
(Free Running)
Subcarrier Frequency
3.579545
MHz
±
10Hz
Digitally derived 26
from 14.3 MHz clock.
Sync Frequency
15.73426 kHz
±0.04
Hz Digitally derived from 14.3 MHz
clock. Locked to subcarrier by
455/2 ratio.
Jitter
5 ns or less
27
1-5