Talkback And Oscillator - Yamaha PM-1000 Manual

ONIE4
HEADPHONE AND ECHO MODULE
A. ECHO SEND (FOLDBACK) MASTER CON-
TROLS Provide overall level control for echo mixing
buses 1 and 2. The audio mixes established with the
echo mix controls in each input module pass through
the Echo Send Masters, and drive the Echo Out jacks.
When the echo outputs are connected to foldback
мед (stage monitor) or performers' headphone systems,
these master controls determine the monitor volume.
When the echo outputs are connected to an echo or
reverb device, the Master controls determine the
level of the delay effect.
B. HEADPHONE MIX PUSHBUTTONS This por-
tion of the module consists of two rows of push-
buttons, each row capable of selecting any combina-
tion of five audio sources. The left and right rows
feed audio to the left and right sides of the head-
phone output. The five available sources are: pro-
gram mix bus 1 through program mix bus 4, and the
B cue bus. When more than one pushbutton per row
is latched, the selected audio sources are blended in
equal proportions.
C. HEADPHONE LEVEL CONTROL Simulta-
neously adjusts the overall volume of the left and
right headphone feeds. This stereo output is
available at two stereo phone jacks. The jacks are
wired in parallel so as to drive one or two pairs of
stereo headphones.
TALKBACK AND OSCILLATOR MODULE
A. OUTPUT ASSIGN SWITCHES When latched,
D switches 1 through 4 apply the module's output to
program mixing buses 1 through 4. (16-channel con-
soles manufactured after February, 1976 (serial
no. 1542 & up), and all 24 and 32- channel consoles
have two additional buttons. These assign the module
output to Echo Mix buses 1 and/or 2.) Depending on
E the status of the talkback button, the output will be
either a vocal signal from the talkback mic input, or a
test tone from the built-in oscillator.
B. OSCILLATOR FUNCTION SWITCH Turns the
oscillator OFF, or sets it for constant sine wave gen-
eration at 1,000 Hz or at 7,000 Hz.
C. TALKBACK MICROPHONE CONNECTOR
Accepts any low impedance microphone for use with
the talkback circuitry.
D. TALKBACK LEVEL CONTROL Adjusts the talk-
back microphone preamplifier gain. This control affects
only the talkback level, not the oscillator.
E. TALKBACK BUTTON Pressing this button activates
the talkback mic. If the oscillator is already switched on,
pressing Talkback interrupts the oscillator and sub-
stitutes audio from the talkback preamplifier.
Headphone & Talkback &
Echo Module Oscillator Module