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LDK 5417 + LDK 4417 User’s Guide | Base Station installation
31
The range of variation of the composite signal with respect to the reference signal is
approximately -12.8 μs + 5.4 μs.
.
The output composite signal subcarrier phase with respect to the external reference signal
(BBS) is adjusted using thumbwheel
«
SC»
.
Adjustment of the composite signal front porch width is made using the «
FRONT PORCH
»
thumbwheel.
☞
Note
This setting has no effect on horizontal blanking width
.
External reference without blackburst
The reference signal should be a black video signal and terminated with 75 Ohms load.
Set the upper switch of S1151 to «OFF». The output composite signal carrier is internally
slaved with respect to the sync signals.
REFERENCE VIDEO
REF
COMPOSITE VIDEO
S1151 : FINE = -6.4µs to +2.7µs
S1151 : WIDE = -12.8µs to +5.4µs
PAL 1,5 ±0,3 μs (1,65 μs ±0,1 μs PAL I)
NTSC 1,5 ±0,1 μs
Composite outputs 1 and 2