Marantz 3800 - Page 27

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50
100
200
1000
2000
5000
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Figure
2-10
Dolby
Frequency
Response,
Decode
Mode
G.
TOTAL
HARMONIC
DISTORTION
(THD)
(1)
(2)
2-12
To measure playback THD at the PRE-
AMP OUTPUT Jack:
(a)
(b)
(c)
Ensure the switches and controls
except the DOLBY Switch are set as
listed in Paragraph 3D. Reset DOLBY
Switch to PLAY.
Apply a 100 Hz signal to the AUX
INPUT Jack and adjust the amplitude
for a O VU indication on the Dolby
VU Meter.
Connect an IHF load at the PRE-
AMP OUTPUT Jack and measure the
THD. THD should be less than 0.5
percent from 20 Hz to 10 kHz and
less than 1.0 percent at 15 kHz.
To measure record THD at the PREAMP
OUTPUT Jack:
(a)
Ensure the switches and controls
except the DOLBY Switch are set as
listed in Paragraph 3D (Decode Loop
Gain). Reset DOLBY Switch to
REC.
(3)
(b)
Perform steps 3G. 1 (b), (c) above.
Values should be the same.
To measure record THD at the TAPE
OUTPUT Jack:
(a)
(b)
(c)
(d)
Ensure the switches and controls
except the DOLBY Switch areset as
listed in Paragraph 3B. Reset DOLBY
Switch to REC |.
Apply a 100 Hz signal to AUX INPUT
Jack and adjust the amplitude for
580 mV rms as measured at the
TAPE | OUTPUT Jack.
Connect an IHF load across the
TAPE | OUTPUT Jack and measure.
THD should be less than 0.5 percent
from 20 Hz to 10 kHz and lessthan
1.0 percent at 15 kHz.
Repeat (b), and (c) above with DOL-
BY Switch set first to PLAY, and
then to REC Il. Values should
remain the same.