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Encoding the 8150 Output (NTSC)
STEP 9:
STEP 10: Reinstall the Main board and option module(s) into the
STEP 11: Make the following connections to the A28.
5-86
Engineering Setup
Set DIP switch U15Q position 1 to ON. This delays the A28
output sync and burst to match the 8150 delay; turn the switch
OFF if you are feeding a source other than the 8150 to the A28.
bottom chassis tray and reinstall the tray into the upper
chassis housing.
REF(ERENCE) IN: Connect one of the following reference
signals to this input according to the option module installed.
Option F (parallel composite digital reference) must have a
parallel D2 signal, locked to the same reference as the 8150,
connected to it.
Option G (composite analog output and reference) must
have black burst, locked to house reference, connected to it,
preferably the same black burst that serves as reference to the
8150. Do not use composite sync or other signals without
color burst, as the A28 needs subcarrier reference to generate
a properly encoded output.
Option H (serial composite digital output and reference)
must have a serial D2 signal, locked to the same reference as
the 8150, connected to it.
REF(ERENCE) OUT: This is a passive loop through with the
Option G and H modules. Connect it to other equipment or
terminate it into 75 ohms. If the Option F module is installed,
this is an active loop through, which you do not need to
terminate. However, it does not provide a loop through
signal if you remove power to the A28.
O/P VA and O/P VB (Options G and H only): These are
identical composite analog video outputs if Option G is
installed, or identical serial composite digital video outputs
if Option H is installed. Connect them to any composite
device that needs the 8150 output in the appropriate format.
With DIP switch U15Q segment 1 turned ON, this output is
delayed 34 lines from the reference connected to the A28.
8150 Technical Guide
9100-0212-04 - May 2000
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