BRUEL & KJAER 4915 - Rear Panel

BRUEL & KJAER 4915

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RESET:

TRIGGER ERROR:

EXT. TRIGGER INPUT:

Push

button

for

manual

trigger

of

single

flash

ignition

when the

"Single

Flash -

Line"

or

"Single

Flash -

Ext."

TRIGGER SOURCE

mode

is

selected.

A LED

indicator

which

when

lit

warns

that

EXT. TRIGGER INPUT

signal

is absent,

trigger

signal

is

not

periodic

or

TRIGGER LEVEL

knob

is

incorrectly

set.

3-pole

coaxial

socket

accepting

the

standard

BNT

plug

JP 0315

or

BNC

plug

JP 0035

supplied.

The

centre

pin

of

the

socket

is

for

application

of

an

external

signal

to

trigger

the flash

ignition

and/or

use

of

the 4913 as

a

tachometer.

The

middle

contact

(see Fig. 2.2)

outputs

+8

V (50

mA

max.) DC

for

powering

an

active

tachometer

probe

such as

the

B & K

MM

0012,

whilst

the

outer

screen

is

ground

and is

internally

connected

to

chassis. The

trigger

input

has an

input

impedance

of

50

kQ

in

series

with

680 nF and is

triggered

by

signals

between

100

mV

and 30 V

Peak-

Peak

with

repetition

frequency

up

to

10 kHz (6000

kr/min)

and

minimum

pulse

width

of

5

µ..s.

See

section

3.3.

Ext. Trigger

Input--~

Input

Imp

: 50k.Q

Max.

Input

:

30V

Pk-Pk

~----+BV

(50mA

max.)

DC

Tachometer Probe

supply

TRIGGER SLOPE:

TRIGGER SENSITIVITY:

TRIGGER LEVEL:

2.1.2.

Rear

Panel

Chassis

Ground

811358

Fig. 2.2. EXT. TRIGGER

INPUT

(external

view)

2-position

switch

for

selecting

triggering

on

positive

or

negative

going

slope

of

external

trigger

signal

waveform.

Single-turn

control

enabling

EXT. TRIGGER INPUT signal levels

from

approximately

100

mV

to

30 V

Peak-Peak

to

be

accommodated

when

set

for

max. and min.

input

sensitivity

respectively

Single-turn

control

for

adjusting

voltage

at

which

the

4913 is

triggered

by

the EXT. TRIGGER INPUT signal. The

approximate

range

of

adjust-

ment

is -0,4 V

to

+0,4

V

with

TRIGGER SENSITIVITY

set

to

"Max."

and -

30 V

to

+30

V

with

TRIGGER SENSITIVITY

set

to

"Min."

LAMP OUTPUT:

4-pin

insulated

socket

carrying

high

voltage

drive

and

ignition

lines

for

connection

to

the

drive

cable

plug

of

the

Lamp

Unit

US 0008

or

the

LAMP

INPUT

plug

of

the

Fibre-Optic

Stroboscope

Source

Type

4915 .

.ffi

WARNING! The

Lamp

Unit

US 0006

supplied

with

earlier

types

of

B & K

stroboscope

is

not

designed

for

operation

with

the 4913 and will

dam-

age

the 4913

if

connected

to

the

LAMP

OUTPUT

socket

SIGNAL OUTPUT:

6-pin

socket

supplying

flash

trigger

and flash

ignition

reference

pulses

for

synchronization

of

an

auxilliary

light

source,

such as the

Portable

Stroboscope

Type

4912

or

the

Fibre-Optic

Stroboscope

Source

Type

4915.

It

accepts

a DIN plug such as

the

B & K

plug

JP 0600

with

screw

lock

provided.

For

connections

see

section

3.

7 and

Chapter

5

respectively.

6

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