Studio Technologies 240 - Manual (Page 32)

Issue 1, August 2013 Model 240 User Guide
Page 32 Studio Technologies, Inc.
Specifications
General Audio:
Frequency Response: 20 Hz-20 kHz, +0/–1 dB,
mic in/main out
Distortion (THD+N): <0.04%, measured at 1 kHz,
mic in/main out
S/N Ratio: 87 dB, referenced to –42 dBu mic in/
0 dBu main out
Dynamic Range (A-weighted): 113 dB, line in/
main out
Microphone Input/Preamplifier:
Type: electronically balanced
Input Impedance: 2 k ohms
CMRR: 83 dB @ 60 Hz, 76 dB @ 20 kHz, 40 dB
gain
Gain Range: 35 to 55 dB, adjustable in 5-dB steps
Compatibility: balanced and unbalanced dynamic
microphones
Compressor (Microphone Input):
Threshold: 2 dB above nominal level
Attack/Release Time: 2 mSec/100 mSec
Slope: 5:1
Status LED: compressor active
Line Inputs: 2
Type: balanced, transformer-coupled with series
capacitors
Impedance: 10 k ohms
Nominal Level: –10 to +6 dBu, adjustable
Main Outputs: 4
Type: transformer-coupled with series capacitors
and isolation resistors
Impedance: 600 ohms
Nominal Level: 0 dBu
Maximum Level: +20 dBu, line in/main out
Aux Headphone Line Inputs: 2
Implementation: requires one or two optional
line input cards (Studio Technologies part number
31084) to be installed into back panel
Type: balanced, transformer-coupled
Impedance: 10 k ohms, nominal
Nominal Level: +4 dBu
Headphone Output: 1, stereo
Compatibility: intended for connection to mono or
stereo headsets or earpieces with nominal imped-
ance of 100 ohms or greater
Type: voltage driver
Maximum Output Voltage: 12 Vpp, 150 ohm load Intercom Interface:
Type: 2-channel, unbalanced (pin 1 common; pin 2
DC with channel 1 audio; pin 3 channel 2 audio)
Compatibility: single- and dual-channel party-line
(PL) intercom systems such as from RTS™ and
Clear-Com®
Impedance: 10 k ohms
Nominal Receive Level: –10 dBu
Nominal Talk Level: –10 dBu
Sidetone (Null): 0 to –18 dB, adjustable
Relays Contacts: 5
Functions: one each follows main output status
and one any talk active
Contacts: form A (normally open, not shorted)
Rating: 100 mA, 60 volts AC/DC, maximum
Contact Resistance: 16 ohms, maximum
Access: requires user-implemented connector
scheme
Multi-Unit Support: Two units can be intercon-
nected via an RS-485 data bus. Audio summing is
performed passively using external wiring.
Power Sources:
Intercom Interface: 24-32 Vdc, 150 mA
External: 20-30 Vdc, 125 mA @ 24 Vdc. Each unit
shipped with a universal input/24 Vdc output power
supply.
Connectors:
Line Inputs, Intercom Interface: 3-pin female XLR
Main Outputs: 3-pin male XLR
Headset (mic/phones): 5-pin female XLR
24 Vdc Power In: 2.1 x 5.5 mm coaxial power jack
with locking bushing, compatible with Switchcraft
S760K plug
Spare Connector Locations: 4
For use by Studio Technologies’ wide range of
option modules. Also allows up to four Neutrik
NC*D-L-1 connectors to be installed (*=3F, 3M,
etc.).
Dimensions (Overall):
8.1 inches wide (20.6 cm)
3.3 inches high (8.4 cm)
8.5 inches deep (22.4 cm)
Weight: 4.5 pounds (2.1 kg)
Specifications and information contained in this
User Guide subject to change without notice.