Manual

EXTERNAL 1 & 2

AD149 has the capability of sending signals to two outstations - external 1 and

external 2. It is suggested that external 1 be used by the boom operator as it has the

facility to talk back to the mixer - it also lacks a level control and on/off switch as these

will be available on the operator's belt pack. External 2 has been designed to drive

headphones for use by a director/producer etc. External 2 has its own on/off

switch (25) and screwdriver-operated level control (24) but has no provision for talking

back to the mixer.

At all times a monitor signal will be present on external 1 output. Selected by

DIL switch 1 on the right-hand PCB of the monitor module, there is a choice of two

signals:

(a) a mono mixdown of the signal appearing on monitor 1 output. In view of the fact

that, during production, the sound operator is more likely to be interested in PFL,

monitor 1 output may be customised to the boom operator's requirements - probably

the main output, so that he may audition his microphone within the overall context.

(This will, probably, also satisfy the sound operator’s requirements - monitoring the

final mix, together with PFL override.)

(b) the same signals that are available to external 2, but independently and externally

selected. There is a choice CHS/MON (27) between MON as (a) above and CHS,

which is a mono mix of all channels selected to MON, but WITHOUT CH (1)

necessarily being selected. (Refer to FIG 16)

In the case of external 1, BOOM 1 (28) will override the selection made on

CHS/MON (27) - and route the boom-microphone to the operator's headset. In the

case of external 2, BOOM 2 (26) will override the selection made on CHS/MON (27) -

and route the boom microphone to the director's/producer's headphones (This facility

must already have been selected on the boom-microphone module. Refer to

microphone/line module section.)

External 1 has the additional capability of its own split monitor, selected by

DIL switch 2 on the right-hand PCB of the monitor module. Whenever communication

is taking place from mixer to external 1, the monitor signal remains on the right

earpiece and communication appears on the left earpiece. (Refer to FIG 16)