Protech audio corporation, 1 to three page inputs can be used, plus bgm – Protech Audio 65306 User Manual
Page 4
1 TO THREE PAGE INPUTS CAN BE USED, PLUS BGM
HI
LO
SH
HI
LO
HI
LO
SH
HI
LO
BGM IN
PAGE 2 IN
PAGE 3 IN
I
NPUTS
PAGE 1
IN
PAGE INPUT 3
IS NORMALLED
THRU BYPASS
RELAY WHEN
POWER IS OFF
HI
LO
SH
HI
LO
HI
GND
ARM
HI
LO
LO
LO
HI
HI
PWR AMP
OUTPUT
PWR AMP
INPUT
N/O N/C
SPKR GRID
RELAY
PAUSE
SENSE
SPKR
SENSING
MIC
TO
POWER AMP
INPUT
HI
LO
SH
HI
LO
HI
GND
ARM
HI
LO
LO
LO
HI
HI
PWR AMP
OUTPUT
PWR AMP
INPUT
N/O N/C
SPKR GRID
RELAY
PAUSE
SENSE
SPKR
SENSING
MIC
TO
POWER AMP
INPUT
USING A SPEAKER FOR CONTINUOUS NOISE SENSING.
USING A MICROPHONE FOR CONTINUOUS NOISE SENSING.
Page 3
SENSE INPUT
MICROPHONE
MODEL 65306 BLOCK DIAGRAM
FILE #65306-06, REV 2, 12-7-95
POWER
AMP
PROTECH AUDIO CORPORATION
INPUT ONE
NORMALED
THRU RELAY FOR
POWER OFF
BYPASS
FOR EXTERNAL
SWITCHING
SENSE INPUT
SPEAKER
PRIOR.
PRIOR.
PRIOR.
PRIOR.
SUM
LED METERING OF
OUTPUT LEVEL, OR,
EXPANSION LEVEL
OUTPUT BUFFER
WITH SELECTABLE
MAXIMUM OUTPUT
(LIMITER)
CONTROL CIRCUIT FOR
VCA, INCLUDING -
THRESHOLD
ATTACK TIME
RELEASE TIME
RATIO OF EXPANSION
EXPANDER LIMIT
MIN/AUTO/MAX
SWITCH
4:1 COMPRES-
SOR
FIXED -20dB
THRESHOLD
SUM
VCA
VOX
CIRCUIT FOR
RELAY DRIVE
- Page 6 -
PAUSE
SENSE
CONTACTS
3
2
1
BGM