API Audio 1608 Recording Console - Manual (Page 47)

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9.3 168B Summing Bus Sub-master (ACA) Connections
The rear panel connections for the 168B Summing Bus Sub-master module are as follows:
9.4 268B Program Bus/Master Output Connections
The rear panel connections for the 268B Program Bus/Master Outputs are as follows:
PGM BUS MIX INPUT:
 Feeds the inputs to the Program Bus
Assignment switches on the Summing Bus Sub-
masters 1-8
 Balanced, Line-level
 1/4” tip-ring-sleeve jack
 Replaces the Summing Bus output signal at the
Left and Right Program Assignment switches
when a jack is inserted
BUS OUTPUT 1-8 (ACA OUTPUT):
 Output from the Summing Bus Sub-masters
SUB 1-8
 Balanced, Line-level
 Female 25-Pin Sub-D connector
PROGRAM BUS INSERT SEND (ACA OUTPUT):
 Balanced, Line-level
 1/4” tip-ring-sleeve jack
 Half-normalled to Program Insert Return
PROGRAM BUS INSERT RETURN (FADER INPUT):
 Balanced, Line-level
 1/4” tip-ring-sleeve jack
 Replaces the Program Insert Send signal when a
jack is inserted and the PRG INS button is
engaged
PROGRAM BUS OUTPUT LEFT and RIGHT:
 Fed post the Stereo Master Fader
 Balanced, Line-level
 Male XLR