Manual

The monitor module is associated with all aural monitoring of input and output signals

together with communications between the sound operator and two outstations -

EXTERNAL 1 & 2.

(Metering of monitor 1 is performed pre fader and matrix amplifiers. Metering of PFL

is performed pre fader.)

It is necessary to be able to audition (in left-right stereo, ie a form the human brain

understands) an X-Y or A-B stereo microphone and an M-S stereo microphone

whether the channel panpots are set centrally or hard left and hard right (thus creating

conflicting monitor requirements). It is also necessary to be able to audition X, Y, M,

S in isolation. Similarly, facilities must be provided to monitor main and auxiliary

outputs, whether they be in the M-S or L-R domain. It is a bonus to be able to

determine the potential of these various signals in their after-life, ie in post-production.

The signal/s to be auditioned on the left and right (unbalanced) outputs of monitor 1

and monitor 2 will be selected from the bank of switches (1) to (9). These switches

are not interlocked - in order that any desired mix of signals may be achieved.

Switch (2) selects the main left-output from the mixer to monitor 1 (& 2) left and right

outputs.

Switch (3) selects the main right-output from the mixer to monitor 1 (& 2) left and right

outputs.

Switch (4) selects the main stereo-output from the mixer to monitor 1(& 2).

MONO (14) mixes any two-channel signal appearing on monitor 1 path and presents it

to both left and right outputs of monitor 1 - in this case, a mono mixdown of the main

output from the mixer. L+R [(2)+(3)] produces the same result.

Switch (5) routes the calibrated (20), stereo-return 1 to monitor 1 (& 2). The return will

probably be the signal from the playback head of the tape recorder. By alternating

adjacent switches (4) and (5), A/B comparisons to and from tape may be made.

[Stereo-return 2 (9) - with its calibration control (21) - is identical with stereo-return 1.]

(Stereo-return 1 is also called L-R return and stereo-return 2 is also called auxiliary

return.)

Switches (6), (7), (8) provide the same functions for the auxiliaries as

switches (2), (3), (4) do for the main mixer output.

Signals for output monitoring are taken from the final mixer-outputs, ie after the

faders, output matrix-amplifiers and limiters.