STUDER REVOX PR99 Bedienungsanleitung Seite 41

Tape
bias
'1.
Connect millivoltmerer ro
LINE OUTPUT
CH1
I
CH2
2.
Connecr AF
generator to
LINE INPUT (10 kHz,
0
VU -20
dB).
3.
Mount
blank tape of the
desired quality
and start machine
in
record mode.
4.
Turn
potentiometers
BIAS
ADJ
CH
1
(SLOW
+
FAST)
BIAS
ADJ. CH2 (SLOW
+
FAST)
clockwise
from the left-hand limit position
until
the
maxi-
mum
AF
output
level is
reached
Select corresponding tape
speed.
Make note
of
the position which
provides maximum indication
and subsequently contlnue turning
the potenttometer in
the
same
direction
until the AF
output voltage
has
dropped by the
value indicated
in
the table below (A
U).
Checking the azimuth of record head
Adjust for maximum output voltage
at 10 kHz
-20 dB
(setscrew
O).
lf necessary recheck the tape
bias.
Adjustment of recording level
(on the desired tape speed)
1
.
Reproduce
levels
must have been adjusted
previously.
2.
Adjust generator
level to 1000
Hz.
at operating
level.
3.
Start machine in record mode.
4.
Set tape
monitor switch [20] to
REPRODUCE.
5.
Adjust potentiometer
INPUT
LEVEL CHl lCN2
[28]
to
the
operating
level.
Check:
No level difference by
switching
f
rom
REPRODUCE
to
INPUT
/
SYNC
Adjustment of recording equalization
1
.
Adlust AF
generator Io 12kHz,0 VU -
20
dB
2.
Start in
record mode
3.
Corresponding to the tape
speed.
adjust potentiometer
EO
S
LOW, FAST
for
an output
voltage
of 0
dB
to
*'l
dB
relative to
l kllz.
Checking of
frequency
response
"Over all"
1
.
Leave AF
generator
at approx. the
same
level
and check
the
frequency response.
2.
lf
necessary, readjust the recording equalization
Adjustment
of SYNC
playback from test tape
1.
Set SYNCH CH1
switch
[31]
to
playback
from
recording
head.
2.
Connect AF millivoltmeter to
LINE
OUTPUT
CH1.
3.
Advance test tape
to
operating level section.
4.
Start machine in reproduce mode
5.
Adjust potentiometer
REPR
LEVEL
CHl to the desired oper-
ating
level.
6.
Depress
SYNC
CH2 button (button
CH1
released).
7.
Connect AF millivoltmerer to
LINE
OUTPUT CH2.
S
Repeat
same adiustments
for
CH2.
U
10
kHz
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Bandsorte
Type of Tape
AU
3
3/4 ips
AU
7U2ips
AU
15
ips
Scotch
206
250
256
2621263
Ampex
406
456
AGFA PEM
468
AGFA PER 525
BASF
SPR
SOLHL
BASF
LGR
3OP
EN/t
8161817
REVOX
631
REVOX
621
6dB
5dB
6dB
6dB
6dB
5dB
6dB
6dB
6dB
6dB
6dB
6dB
4,5
dB
5.5 dB
6dB
6,5
dB
6dB
5dB
6,5 dB
6dB
5,5 dB
5,5 dB
5,5 dB
6.5 dB
6dB
4dB
3dB
3,5
dB
3,5 dB
3dB
3dB
3,5 dB
3,5
dB
3dB
3,5
dB
4dB
4dB
4dB
2,5
dB
16