Service manual

A-10
Composite video output
A
Technical specifications
◆
Composite video output
Composite video
formats
Composite Video I/F PAL systems B, G, H, I
NTSC system M
According to ITU-R Report 624-4,
1990
Composite video output Number of outputs 2
Connector type BNC
Nominal output impedance 75 Ω
Isolation between outputs > 40 dB, 10 Hz to 5.5 MHz
Return loss > 35 dB, 10 Hz to 5.5 MHz
Nominal output level 0 dBV
Difference between black and blanking level 0 to 10% of 100 IRE. Selectable in
2.5% steps.
Non-useful DC-component < ±30 mV
Recovery time after
50 ms of input loss to decoder < length of GOP plus 50 ms
3 s of input loss to decoder < 2000 ms
Switch on input < 2000 ms
Sync and burst
characteristics
Horizontal and Vertical Synchronization Characteristics
Shaping and sequence
all video formats Acc. to ITU-R rep. 624-4, 1990,
SMPTE 170M
Color Subcarrier Burst Characteristics
Shaping of color subcarrier burst Acc. to ITU-R rep. 624-4, SMPTE
170M
Amplitude accuracy of color
subcarrier burst ± 2%
Test and idle signals Video idle signals
Sync. mode 50% gray or black (selectable),
incl. Correct sync. and burst pulses
according to the selected video for-
mat
Zero volt DC mode Constant DC (< 30 mV) without
sync and burst
Output video stability SCH phase jitter, jitter free input < 2 degr
pp
Line time jitter, jitter free input < ±2.5 ns
pp
Maximum color sub-carrier frequency
deviation from input frequency PAL and NTSC: 0.045 ppm
2)
measurement time > 0.2 s
Maximum sub-carrier frequency
2) This corresponds to 72 deg/s for 4.43 MHz PAL systems and 58 deg/s for
NTSC.