Zenith PRO895X setup guide Specifications for RGB Sync Inputs

SPECIFICATIONS FOR RGB SYNC INPUTS

Version 2.1 December 21, 1995

I. SYNC INPUTS

There are three Sync signal inputs for use with RGB sources:

1.SYNC-ON-GREEN (SOG) - - this is through the Green video input BNC jack, terminated 75 ohms.

2.HORIZONTAL/COMPOSITE (H / Comp) - - through a BNC jack on the 9-1515 Combo module, software switchable termination 2K/75 ohms.

3.VERTICAL (V) - - through a BNC jack on the 9-1515 Combo module, software switchable termination 2K/75 ohms.

II. COMPATIBILITY

1.SYNC-ON-GREEN - - negative-going sync on Green video input, either EIA or SMPTE (HD) spec compatible.

2.HORIZONTAL/COMPOSITE

a.Analog/TTL Mode - - TTL-level computer syncs (VGA, Macintosh), NTSC/PAL/SECAM studio/commer-

cial horizontal/composite analog sync.

b.Special Composite Mode - - NTSC/PAL/SECAM or SMPTE HD studio/commercial negative composite or tri-level analog sync (Black Video).

3.VERTICAL - - TTL-level computer syncs (VGA, Macintosh), NTSC/PAL/SECAM studio/commercial nega- tive vertical analog sync.

III. FREQUENCY RANGE

1.SYNC-ON-GREEN - - Horizontal component: 15kHz to

40kHz. Vertical component: 50 to 100 Hz.

2.HORIZONTAL/COMPOSITE - - Horizontal component: 15kHz to 40kHz. Vertical component: 50 to 100 Hz.

3.VERTICAL - - 50 to 100 Hz.

IV. AMPLITUDE

1.SYNC-ON-GREEN - - Sync portion: 300mV, +/- 150mV.

2.HORIZONTAL/COMPOSITE

a.Analog/TTL Mode - - 0.7Vp-p to 5Vp-p.

b.Special Composite Mode - - 300mV, +/- 150mV.

3.VERTICAL - - 0.7Vp-p to 5Vp-p.

V. POLARITY

1.SYNC-ON-GREEN - - negative.

2.HORIZONTAL/COMPOSITE

a.Analog/TTL Mode - - positive or negative.

b.Special Composite Mode - - negative.

3.VERTICAL - - positive or negative.

VI. PULSE WIDTH OR DUTY CYCLE

1.SYNC-ON-GREEN - - Minimum sync pulse width = 400nS.

2.HORIZONTAL/COMPOSITE

a.Analog/TTL Mode. - - Max duty cycle of sync pulse (Vsync in = 0.7Vp-p) = 15% Max duty cycle of sync pulse (Vsync in 1.4Vp-p) = 30%.

b.Special Composite Mode - - Minimum sync pulse width = 400nS.

3.VERTICAL - - Max duty cycle of sync pulse (Vsync in = 0.7Vp-p) = 15% Max duty cycle of sync pulse (Vsync in 1.4Vp-p) = 30%.

3276-A P A G E 1 5