QVision Operations and Installation Guide
A-2
The following input sync information is presented for technically sophisticated
users who want to connect the monitor to a non-COMPAQ computer. You may
need to provide your own cables or connectors to the computer.
Non-technical users should consult an Authorized COMPAQ Reseller or an
Authorized COMPAQ Service Provider.
ACCEPTABLE SIGNAL
TRANSMISSION SCHEMES
Composite Sync on Green
This scheme uses 3 of the 5 BNC connectors. The other two are not used
and should not be connected.
Video Input Characteristic:
Typical input impedance of the videoamps is
75 ohm.
Video Signal Definition:
The three video inputs are red, green, and blue
analog signals, where 660 milli-volts is the maximum signal amplitude
above the black level. The green video input signal contains sync
information.
Black Level:
The black level is 0.054 volts above the front/back porch
reference level.
Sync Signal Definition:
Horizontal and vertical synchronization signals
are integrated onto the green video signal, using RS-343-A voltage levels.
Composite Sync, Separate Analog
Videos
This scheme uses 4 of the 5 BNC connectors. The other one is not used
and should not be connected.
Video Input Characteristic:
Typical input impedance of the videoamps is
75 ohm.
Video Signal Definition:
The three video inputs consist of red, green, and
blue signals, each with an associated ground, driven into a terminated
line. The video signals are analog, where 0 volts corresponds to black,
and 0.7 corresponding to white, and 1.00 volt is the maximum allowable
signal amplitude above the 0 volt reference.
