Sennheiser SER 1-3 User Manual download pdf (Page 123)

Mixer

Monitoring Unit

ML

101

Supplementary

unit

for M

101.

Input for two

M 101s.

Built -in

loudspeaker.

Prelistening output.

Signal path cueing.

Feedback cueing.

Loudspeaker doubles

as cue microphone.

Tape monitoring of direct and off

-tape levels.

Suitable

for battery or mains operation.

The ML 101 monitor unit

has

been developed

to

expand the

versatility of the M

101 4-

channel

mixer

unit. Combination

of the M

101

/ML 101

units

offers

operating and

monitoring

facilities which

have

hitherto been available only

with large

fixed

mixer systems.

It

permits

direct and off-tape

moni-

toring

as well as pre -fade

listening

by

headphone

or

built -in

loudspeaker.

Cues

can be superimposed

on the useful

signal or

fed

back separately,

for

example to the cameraman or

reporter.

The monitoring unit

incorporates 2 4 -Watt ampli-

fiers. One amplifier

triggers either the

built -in

loudspeaker or the

headphone output and per-

forms

the

following

monitoring functions:

1. The output signal of

the mixer desk

can be

monitored (direct tape

monitoring).

2.

Off-tape

monitoring is

possible

by simple switch

-

over.

Two symmetrical

floating tape

recorder

inputs are provided

for this purpose.

The direct

and off

-tape signal can be balanced

to a corn

mon

level by means of a

rotary

potentiometer.

3. The signal

at the

input

of the

microphone chan-

nels can be

monitored with the channel

fader

down by pressing

the pre -fade

listening button

in

the M

101.

The

second amplifier

feeds

two

headphone out-

puts coupled

in parallel, through

which it

is

possible to

monitor the output signal

of the

mixer

units

or to

feed it

to a cameraman

or

interviewer.

This path can also

be used

for

cueing.

For this

purpose a button

is

provided to allow

the built -in

loudspeaker to be used as a

microphone.

A

link

with the summing

point of

mixer

unit

M

101

permits superimposing of

cueing

via

the

mixer

unit output

to a connected tape

recorder. Here,

also, the

loudspeaker

is

used

as a microphone.

The

monitoring unit also

incorporates a transforme

which

is linked via a decoupling

amplifier

with

the

mixer unit output and generates

a

level

of

15 dB

via

a secondary

winding.

The

symmetrical

+

6 dB out-

put

is fed to a

large

3 -pin

Tuchel connector

and the

+ 15

dB output

to two unit

terminals.

The appropriate

inputs

are

duplicated

for parallel

connection of

two M

101 units to the

ML 101

monitor unit.

The unit

is incorporated

in a housing

with the

same

dimensions as

the M 101

mixer. As with the

latter,

it

can be powered

by the

built -in battery

pack, the

interchangeable MN

101 mains unit or

via an external

dc

line.

A small

moving coil

meter

indicates the supply

voltage level.

Technical

Data:

ML 101 (Part

No. 0385)

Inputs:

1.

Two

inputs for

connecting

the M

101

Sensitivity

Input impedance

2. Two inputs for pre -fade listening

Sensitivity

Input impedance

3 Two

inputs for

direct

monitoring

Sensitivity

Max. permissible

input level

Impedance

Outputs:

1.

Output

for modulation

Output

leve 1

Output leve' 2

2. Headphone outputs

Output

level

Minimum load impedance

Temperature

range

Current drain,

no load

/monitoring

Dimension

in

mm

Batteries

. .

. . asymmetric

. . 1.55 V

5 kO

asymmetric

80 mV

120

k52

symmetrical,

floating

300 mV adjustable

2V

20 k52

Weight (with batteries)

Rights reserved to adopt modifications,

especially

in the course

of

technological

progress.

symmetrical,

floating

+6dBto20052

+15dBto60052

asymmetric

max.

4

V adjustable

452

-20'Cto +50 °C

35

mA

/100

mA

347 x 233 s

126

2 x

9

V

Eveready

No. 276 or

equivalent (IEC 6

F

100)

6

kg

123

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