8.6.2 Artist Manager to Cue
By operating the selector switch in the box marked Artist Manager the output
from this microphone can be diverted from the talkback circuit to either Cue 1 or
Cue 2. The box contains separate level controls for the two circuits and these
controls feed to cue bus lines through Amplifiers B.
8.7
Track Announce
8.7.1 Signals
Signal from the output of the operator’s Amplifier A3 (B9) is fed to a preset
level control at the bottom right and corner of the panel. This is padded out with
resistors at both ends so that it has a range of about 5 to 25dB of loss. With the
oscillator key K2 in its normal central position, signal from the level control is
connected to the input of an Amplifier M (see 12.13). Output 2 of this amplifier is
connected to the track announce inputs of the Main Cassettes.
8.7.2 Switching – Separate Tracks
Operating a track announce button on a Main Cassette connects the signal
line of 8.7.1 with that channel in place of the existing signal, and also short circuits
pins 25 and 35 of PL1 on the Studio Playback Cassette to operate active relay RL1,
thereby quieting the control room monitor loudspeakers.
8.7.3 Switching – Multi-Track
Operating the multi-track announce button which is at the bottom left hand
corner of the cassette, operates active relay RL1 to quiet the control room monitor
loudspeakers and through a lead on pin 21 of PL1 operates the active relays RL5 in
all the Main Cassettes, thereby providing control signals to switch the Amplifiers N
to the track announce signal line.
8.8
Oscillator
The circuit is described in 12.20.
8.8.1 Frequencies
The oscillator frequency switch selects any of the following frequencies 0.03,
0.06, 0.1, 0.5, 1, 3, 5,8, 10, 12 and 15kHz.
8.8.2 Level
The output level from the oscillator is +10dBV at all frequencies. The output
feeds a general purpose attenuator calibrated from +10dB to –30dB and “off” so that
the level at the slider is that indicated by the calibration.
8.8.3 Distribution
When the oscillator key is in the mid position, the oscillator is disconnected
from the attenuator. In both other positions the output of the oscillator control is
