136 | Chapter 2 - Installation |
| Equipment phase alignment with a digital installation |
2.5.1- Equipment slaved to an external reference connected to the «GENLOCK» input
The reference signal should be a black video signal with or without burst delivred by a Broadcast generator and terminated with 75 Ohms load.
0,3 V
0,3 V
0,3 V
Reference with Black Burst (BBS) | Reference without Black Burst |
Horizontal phase alignment of the digital output signal
The horizontal phase of the digital output signal with respect to the external reference signal is adjusted using the «ΦH COARSE» and «ΦH FINE» thumbwheels. The range of variation depends of the S170 switch position if Z160 soft version is ≥ 47017011/D (iden- tified 011/D on the circuit):
S170 up position (FINE):
•«ΦH COARSE»: Adjustment in steps of 592 ns.
•«ΦH FINE»: Adjustment in steps of 37 ns.
The range of variation of the digital output signal with respect to the reference signal is around 9.5 µs
S170 down position (WIDE):
•«ΦH COARSE»: Adjustment in steps of 1184 ns.
•«ΦH FINE»: Adjustment in steps of 74 ns.
The range of variation of the digital output signal with respect to the reference signal is around 19 µs (± 9,5 µs).
Signal de référence
Signal numérique
EAV | SAV | EAV | SAV |
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| S170 | : FINE = |
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| S170 | : WIDE = ±9,5 µs |
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| REF |
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With the Z160 soft version ≤ 47017011/C (identified 011/C on the Z160 circuit):
•S170 enable a bar pattern on all the Channel Control Unit outputs.
•«ΦH COARSE»: Digital signal phase adjustment in steps of 592 ns.
THOMSON TTV1707 / CCU DT500 | B1707M00LD |
User manual | September 2000 |
