Model 46A User Guide
Issue 1, September 2014
Studio Technologies, Inc.
Page 27
Specifications
General Audio:
Frequency Response:
±2 dB 100 Hz to 8 kHz
Distortion (THD+N):
<0.5%, measured at 1 kHz,
4-wire input to 2-wire interface pin 2
Signal-to-Noise Ratio:
>55 dB, measured at
1 kHz, 4-wire input to 2-wire interface pin 2
Connectors:
Inputs from 4-Wire:
3-pin female XLR
Outputs to 4-Wire:
3-pin male XLR
2-Wire Party-Line Intercom:
3-pin male XLR
Remote Control:
10-pin header, requires optional
10-pin ribbon connector assembly
AC Mains:
3-blade, IEC 320 C14 (mates with
IEC 320 C13)
2-Wire Party-Line Intercom Interfaces:
2
Type:
2-channel party-line (PL), unbalanced
(pin 1 common; pin 2 channel 1 audio or DC with
channel 1 audio; pin 3 channel 2 audio)
Compatibility:
single- and 2-channel intercom
systems such as from RTS® and Clear-Com®
Impedance, External Power Mode:
>10 k ohms
Impedance, Internal Power Mode:
200 ohms
Nominal Level:
–10 or –14 dBu, selectable
“Mic Kill” Signal:
square wave, 24 kHz, ±1%
Internal Power Source:
30 volts DC nominal,
315 mA maximum
Hybrids:
4, 2 per interface
Topology:
3-section analog circuitry compensates
for resistive, inductive, and capacitive 2-wire party-
line loads
Nulling Method:
automatic upon user initiation,
processor implements digital control of analog cir-
cuitry; null settings stored in non-volatile memory
Nulling Line Impedance Range:
120-350 ohms
Nulling Cable Length Range:
0-3500 feet, typical
Trans-Hybrid Loss:
>40 dB, typical at 800 Hz
4-Wire Inputs:
4, 2 per interface
Type:
transformer-coupled, capacitor isolated
Impedance:
13 k ohms
Nominal Level:
0, +4, +6, or +8 dBu, selectable
in tandem with nominal output level
Maximum Level:
+22 dBu
4-Wire Outputs:
4, 2 per interface
Type:
transformer-coupled, capacitor isolated
Impedance:
50 ohms nominal
Nominal Level:
0, +4, +6, or +8 dBu, selectable
in tandem with nominal input level
Maximum Level:
+20 dBu into 2 k ohms
Meters:
8
Function:
displays level of 4-wire inputs and
outputs
Type:
5-segment LED, modified VU ballistics
Remote Control Inputs:
3
Type:
optically coupled
Input:
3-32 volts DC; 2 mA minimum for operation,
20 mA maximum
Functions:
auto null interface 1, auto null interface 2,
and “mic kill”
AC Mains Requirement:
100-240 volts (–15/+10%),
50/60 Hz, 34 watts maximum
Dimensions (Overall):
19.0 inches wide (48.3 cm)
1.72 inches high (4.4 cm)
8.4 inches deep (21.3 cm)
Mounting:
one space (1U) in a standard 19-inch
rack
Weight:
4.6 pounds (2.1 kg)
Specifications and information contained in this
User Guide subject to change without notice.
