Advertisement
nn
Frequency
Test Tape
TTA-119D
TAPE
TAPE
SELECTOR
| SELECTOR
CcrO,
Fe-Cr
=
+2
60Hz
3 dB
Test Tape
TTA-119E
Test Tape
TTA-119A
TAPE
SELECTOR
LH-NORMAL
100Hz
1kHz
10kHz
15kHz
12.5kHz
For LH-NORMAL,
measure at 12.5kHz instead of 15kHz.
pass filter.
Rating:
More than 30dB
Crosstaik
TAPE SELECTOR:
LH-NORMAL
Turn
tape over and measure right channel
leakage level with
respect to right channel
output
Jevel of signal recorded for
channel
separation
measurement
(step
6 above).
Employ
bandpass filter.
Rating:
More than 60dB
Doiby NR
Effectiveness
TAPE SELECTOR:
LH-NORMAL
Play
test tape
TTA-114
and
measure
DOLBY
NR
switch
ON
level
difference
with
respect
to
DOLBY
NR
switch
OFF level.
Rating:
—4 +1dB
DNL
Effectiveness
install
test tape
and
set for playback
mode,
then
set for
pause.
Measure
noise
level difference with
DNL
switch ON
4
Recording/Playback
S/N
in respect to noise level with DNL
switch OFF.
Apply
400HZz
signal via MIC
jack and adjust attenuator for
Rating:
More than 3dB
OVU
indication
on set VU meter. Short input and record
with
no signal. Play back and measure
ratio between signal
and no-signal
portions.
Ratings:
TAPE
SELECTOR
DOLBY-NR
OFF| DOLBY-NR
ON
S/N (dB)
S/N (dB)
j$———
—
CrO2
Fe-Cr
LH-NORMAL
Erase Efficiency
TAPE SELECTOR:
CrO,
Rating:
—65dB
11
Advertisement
