Advent 100A Owner's Manual page 22

Model lOOA and such equipment can in every audible
way surpa s the results of the finest professional studio
recorder operating at 15 ips.
As for l
'l'i
ips, we ugge t you not be afraid to
try
it.
Chances are that it will at least provide the listenable
kind of background music quality you u ed to as ociate
Specifications
The Advent Model lOOA consists of two eparate
ections: a record section incorporating four line pre-
amplifiers and a pair of record Dolby processors, and a
playback ection incorporating a pair of playback Dolby
decoders and playback line preamplifier .
General
Inputs: Four mdividual (two on each channel) high
level inputs, each with its own individual
level control.
Mixing: Two mix:abl inputs on each channel. All
four inputs are controlled by a ma ter
Record Level control.
Output : Two individually controlled preamp out-
puts (one for each channel). Front panel
tereo headphone output. Two rear panel
+
1 Volts jacks for powering two accessory
MPR-1 microphone preamps.
Monitoring: Separate record and playback ection retain
full source-tape monitoring when used with
a recorder that incorporates thi feature.
Metering: Complete metering facilities, including a
built-in calibration tone oscillator, are
provided for precise level calibration of the
Dolby System.
Overall Performance
Re ponse:
Distortion:
Total oise:
20-20,000 Hz ± ldB.
0.1
%
THD at Dolby Level at any
fr quency from 20-20,000 Hz.
0.1 % IM distortion at Dolby Level.
70 dB b low Dolby Level
oi e Reduction: 10 dB @4,000 Hz and above
9 dB @ 2,400 Hz
6dB@1,200 Hz
3dB@ 600Hz
19
with 3% ips. And on the best open reel machines and
cassette decks, it is literally possible to make recordings
u ing the Model lOOA that rival 71/i. ip performance.
We cannot, of course, be sure of the capabilities of
your particular recorder, o be sure to experiment with
an open, as well as objectively critical mind.
Record ection
Input Sensitivity: (Line 1 and 2) 60 mv for Dolby Level
(OVU).
Input Impedance: 25,000 ohms minimum.
MX Filter:
19 kHz and 38
kHz notch filters to
prevent false triggering of the Dolby
System by FM multiplex subcarriers.
With MX FILTER in, response is less
than 1 dB
down at 15 kHz, greater than
30 dB down at 19 kHz, and greater
than 20 dB down
at 38 kHz.
Output:
500
mv at Dolby Level, low
Z.
Playback ection
Input Sen itivity: 100 mv for Dolby Level (OVU).
Input Impedance: 25,000 ohms minimum.
Bias Filter:
Output:
Low pass filter for eliminating bias
and bias (supersonic) noise from out-
put signal of tape recorder. Flat at
20 kHz. 3 dB down point is 28 kHz.
with an 18 dB per octave roll-off
thereafter.
With OUTPUT LEVEL controls at
maximum, 1.0 volt from Dolby Level,
lowZ.
Mechanical Specification
Front Panel: 12'¥s" x 4'¥s"
Chassis Size: 11%" x4Y s" x 71/i." deep
Overall Height with Feet:
5"
Overall Depth with Knobs: 8%"