Werbung
Continuation page 36
point 12.2
13.
Distortion factor
measured when
the +3 dB indica-
tion just disap-
pears.
Tapes:
Cr, IEC Il NEW
(U 546W)
Me, IEC IV
(E 912 BH)
Fe, IEC |
(R 732 DG)
. External and
noise voltage ra-
tios
when the + 3 dB
indication
for the left
and right channel
just disappears.
- Playback, Start
QO
v
Set the level controls
correspondingly
- Insert Cr-, Fe-, Me-
cassettes one afier the
other and measure the
individual channels.
- Dolby NR off
- Record Start
0,0
- Playback, Start
- Insert a cassette
- Dolby NR off/on
- Tapes:
"Cr"
"Fe"
"Me"
- Record, Start
Q,0
Test circuit 2
f
=333 Hz
Vin =ca. 1000 mV
- Turn the level controls
left and right so that the
+ 3 dB level control indi-
cation just disappears or
that V_
at LINE OUT is
out
780 mV + 0.5 GB.
V,,~ Test circuit 5
Ich.
LINE
OUT
Vour ~ Pest circuit 1
f =315Hz
Viq= ca. 1000 mV
- Set the level controls
so that the left and
right level control indi-
cation of +3 dB just
disappears.
Voie Test circuit 2
=
IEC li tape: Cr
External voltage DIN rms
Noise voltage, curve A, rms
EC IV - tape: Me
External voltage DIN rms
Noise voltage, curve A, rms
IEC | - tape: Fe
External voltage DIN rms
Noise voltage, curve A, rms
40 Hz
Tolerance range of
frequency response acc.
to DIN 45500
Limit frequencies:
f |
= 40 Hz
ower
F upper = 14 kHz
Vout" (Tape mode)
measured at the LINE out-
put with test circuit 1:
780 mV +0.5 dB
Distortion factors:
Crnew:
K,<3%
Fe:
K, $2 %
Me:
K, $3 %
Set the MASTER
CONTROL to maximum,
set "LEVEL LEFT and
RIGHT" so that V._.is
out
295 mV-1 dB at test point
E 3 or E 4 when the
+ 3 GB indication dis-
appears.
Dolby off
Dolby B on
Dolby C on
251dB
255¢B
257dB
Dolby off
Dolby B on
Dolby C on
255(dB
263 dB
2690B
2501B
2 541B
256 (dB
Dolby off
Dolby B on
Dolby C on
252 1B
261dB
268 (dB
Dolby off
Dolby B on
Dolby C on
Dolby off
Dolby B on
Dolby C on
250(B
254 (1B
256 (1B
Dolby off
Dolby B on
Dolby C on
252 1B
261<0B
268 (0B
Werbung
