Fostex G16 - Page 44

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Tangency

adjusting

screw

Azimuth

and

phase

adjusting

screw

Height

and

Tilt

adjusting

screw

Fig.

4.13

Adjust

the

Azimuth

and

Phase

Adjusting

Screw

for

maximum

reading

on

all

sixteen

LED

bargraph

meters

of

the

recorder.

Then,

set

the

oscilloscope

to

XY

mode

to

obtain

a

lissajous

waveform

to

check

the

phase.

Trace

for

vertical

input

alone

Trace

for

horizontal

input

alone

Fig.

4.14

Unequal

levels

If

the

trace

length

between

(X)

and

(Y)

are

not

the

same,

it

means

that

the

two

inputs

to

the

oscilloscope

are

not

of

the

same

level.

Correct

for

equal

lengths

by

the

oscilloscope

controls.

If

the

playback

head

azimuth

is

out

of

alignment,

the

following

patterns

will

result:

(A

small

misalignment

30°

out

of

phase)

outof

phase)

(A

big

one,

180°

out

of

phase)

(Perfect

azimuth

0°,

in

phase)

Fig.

4.15

41

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