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Routing, Monitoring,
and Communications for Digital Audio Workstations
The
Model 60A Central Controller and the Model 61 Control Console are part of
the StudioComm family of products. Designed as a cost-effective, flexible
system, the Model 60A and Model 61 provide the most commonly asked for
features in a compact, easy-to-use package. This StudioComm system is
ideal for audio production facilities that require flexible monitoring,
routing, and communications. Model 60A and Model 61 features include
control room monitoring, dub (copy) output, integrated headphone cue
system, and auxiliary switcher. With these features, this StudioComm
system can dramatically increase production efficiency in disk-based
recording and editing facilities. A wide range of other specialized audio
applications can also be supported. A complete system consists of a
rack-mounted central controller and a desktop control console.
Model
60A Central Controller
The
single rack-space Model 60A contains the main StudioComm electronics. It
is intended to be located in an equipment rack adjacent to the audio work
area. The back panel provides standard connectors to interface audio input
and output signals. The front panel contains many of the operating
switches and controls.
Model
61 Control Console
The
Model 61 is a compact "command center" providing the most
frequently used operator functions. It is designed to be placed at the
main audio work surface,
giving personnel rapid, fingertip
adjustment
of the control room level and access to the monaural and headphone cue
functions. For convenient wide-range voice pickup an electret condenser
microphone is located near the top of the console. A 5-conductor
MIDI-style cable links the Model 61 with the Model 60A Central
Controller.
Features
Four Stereo Line Inputs
The
analog audio outputs of digital audio workstations, DAT recorders, video
editing equipment, CD players, cassette decks, or virtually any analog
source can be connected to the Model 60A's line inputs. The inputs accept
balanced or unbalanced signals, and can be individually configured for
either –10 dBv or +4 dBu operating levels. Each input can also be
configured to accept a stereo or mono signal.
Control
Room Output
A
stereo output is provided for connection to the loudspeaker system. The
output is electronically balanced and designed for connection to audio
power amplifiers or amplified loudspeakers. Switches on the front panel of
the Model 60A Central Controller allow selection of one or more of the
four input signals. A smooth-feeling rotary control on the Model 61
Control Console allows the control room level to be adjusted. As a
production or mixing aid, the Model 61 also contains a button that
activates the control room monaural (L+R) function. For broadcast or other
special application, an external switch or contact closure can be
connected to the Model 60A, allowing the control room output to be muted
as required. An LED indicator on the Model 60A's front panel lights
whenever mute is active.
Headphone
Cue System
A
full-featured stereo headphone cue system is provided, allowing one or
two pairs of headphones to be connected. The resulting output signal is
very loud, and very "clean." The Model 60A contains two headphone jacks,
one on the front panel and one on the back panel. Each has an
independent driver circuit allowing flexibility during installation and
operation. A switch on the Model 60A's front panel selects the headphone
source—either
the source selected for the control room output or the source selected
for the dub output. A rotary control on the Model 60A sets the output
level. The sonic quality of the headphone outputs is such that they
could be used as additional line-level outputs if required.
The
Model 61 Control Console contains a microphone and associated push
button switch, allowing voice cues to be sent to the headphone output. A
rotary trim control on the Model 60A's front panel allows adjustment of
the cue signal level. A switch selects whether the cue signal interrupts
(replaces) the program audio, or sums (adds) the cue signal to the
program audio. The control room output level automatically reduces
("dims") whenever cue is active.
Dub
Output
A
stereo line-level output is provided to support dubbing (copying),
routing, or other specialized applications. Switches on the front panel of
the Model 60A Central Controller allow selection of one or more of the
input signals as the dub source. For flexibility, a rotary control allows
the nominal output level to be adjusted. Turned fully clockwise the output
is set for +4dBu, with a calibration mark also shown for a nominal –10dBv
output.
Auxiliary
Switcher
The
auxiliary switcher section allows a variety of installer-implemented
functions to be created. Entirely passive, with no active electronics,
stereo, balanced or unbalanced, signals can be connected. This allows a
wide range of input and output routing applications to be implemented. As
an example, the Model 60A's auxiliary switcher section can be used to
implement a 1-input/3-output source selector. Used in conjunction with the
Model 60A's control room output, it would allow selection of up to three
sets of control room loudspeakers. The auxiliary switcher could also be
used as a 3-input/1-output source selector.
Specifications
Model 60A Central Controller
Audio
Inputs: 4, stereo
Type: electronically balanced, direct coupled, compatible with balanced or
unbalanced signals
Impedance: 24 k ohms
Nominal Input Level: –10 dBv or +4 dBu, each input individually
configurable
Common Mode Rejection: 100 dB @ DC and 60 Hz, 70 dB @ 20 kHz, 62 dB @ 40 kHz
(typical)
Control
Room Output: 1, stereo
Type: electronically balanced, intended to drive loads of 600 ohms or
greater, balanced or unbalanced
Output Level (input source at nominal level): –68 dBu at 0% rotation
(fully counterclockwise), –50 dBu at 25% rotation, –32 dBu at 50%
rotation, –14 dBu at 75% rotation, +4 dBu at 100% rotation (fully
clockwise)
Maximum Output Level: +27 dBu into 10 k ohms, +26 dBu into 600 ohms
Frequency Response: 10 Hz-40 kHz +0/–0.5 dB
Distortion (THD+N): 0.02% (measured at 1 kHz)
S/N Ratio: 87 dB (20 Hz-20 kHz, ref. +4 dBu output)
Mono: (L+R) –6 dB (voltage) to both left and right outputs
Mute: output level drops to 90 dBu upon application of contact closure.
Contact closure must be capable of handling 7 mA at 15 volts DC.
Dim: output level drops approximately 18 dB when cue (talk to phones)
active
Dub
Output: 1, stereo
Type: electronically balanced, intended to drive balanced or unbalanced
loads of 600 ohms or greater
Nominal Output Level: +4 dBu, adjustable +0/– infinity dB
Maximum Output Level: +27 dBu into 10 k ohms, +26 dBu into 600 ohms
Frequency Response: 10 Hz-40 kHz +0/–0.25 dB
Distortion (THD+N): 0.005% (measured at 1 kHz)
S/N Ratio: 90 dB (20 Hz-20 kHz, ref. +4 dBu)
Headphone
Output: 2, each jack (front and back) has separate output circuit
Compatibility: each output intended for connection to headphones with
impedance of 100 ohms or greater
Maximum Voltage: 8 Vpp, 100 ohm load
Auxiliary
Switcher:
Applications: allows a 1-in/3-out or 3-in/1-out switcher function to be
implemented
Switching: passive (no electronics in signal path)
Nominal Operating Level: not specified
Contact Material: silver
Contact Rating: 0.1 A, 30 V, maximum
Life: 10,000 operations per switch position
Connectors:
Audio and Control: ¼-inch, 3-conductor phone
jacks
AC Mains: standard 3-blade plug, meets IEC
320 specifications
Fusing:
1
Type: 5 x 20mm time lag (Littelfuse 218-series or equivalent)
Rating: 0.2A for 100 and 120V mains power, 0.1A for 220/240V mains
power
LED
Indicators: 2, power present and control room mute
AC
Mains Requirement: 100, 120, or 220/240 V,
±10%, factory configured, 50/60 Hz, 100-120 V 0.2 A maximum, 220/240 V 0.1 A
maximum
Dimensions
(Overall):
19.00 inches wide (48.3 cm)
1.72 inches high (4.4 cm)
6.65 inches deep (16.9 cm)
Mounting:
one space in a standard 19-inch rack
Weight:
6.5 pounds (3.0 kg)
Model 61 Control Console
Power
Requirements: provided by Model 60A Central Controller
Interconnection:
5-conductor MIDI-style cable, 10-foot (3.1 m) cable supplied, maximum
length 50 feet (15.3 m)
Internal
Microphone:
Type: electret condenser
Frequency Response: 3 dB roll off at 200 Hz
LED
Indicators: 2, mono active and cue (talk to phones) active
Dimensions
(Overall):
3.2 inches wide (8.1 cm)
2.2 inches high (5.6 cm)
4.1 inches deep (10.4 cm)
Mounting:
desktop
Weight:
0.8 pounds (0.4 kg)
Specifications
subject to change without notice.
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