Burst Electronics SG-8 - Manual (Page 3)

constant on, or an alternating 5 second on, 5
second off. Factory default is constant on. Cut
jumper SW1 on the output connector board to
have a 5 second duty cycle on/off.
There are also three Black Burst outputs. These
are present at all times and are genlocked to the
internal Color Bar generator.
An ID (example “WPBS #2”) can be programmed
into the SMPTE Color Bar pattern. Consult Burst
Electronics for details.
Loss of Video
The video detection process utilizes a
sophisticated sync separator circuit and a micro
controller IC to analyze the “A” input. The
composite sync tip amplitude, vertical sync,
horizontal sync, and frame pulse are all analyzed
by the micro controller to determine the quality of
the incoming video on the “A” input.
Setting the DIP Switch
The DIP Switch sets the video accept/reject
criteria. To set the switch, first remove the SG-8’s
front panel and top cover. There is a four position
DIP switch on the board that is suspended upside
down above the main board. The switch is factory
preset to (from left to right) Closed, Open, Open,
Open or Up, Down, Down, Down. The sync
SG-8 Loss of Signal, Audio/Video, ID Inserter 3