Manual

Model 348 User Guide Issue 1, January 2020
Studio Technologies, Inc. Page 33
MODEL 348
INTERCOM STATION
Specifications
Applications: Dante-based intercom, IFB (interrupted
foldback) master station, audio monitor mixer, specialized
tone generator
Power Sources:
Power-over-Ethernet (PoE): class 0 (classification
unimplemented, ≤12.94 watts) per IEEE® 802.3af
External: 10 to 18 volts DC, 0.65 A maximum at 10 volts
DC (can be powered by optional PS-DC-02)
Network Audio Technology:
Type: Dante audio-over-Ethernet
AES67-2013 Support: yes, selectable on/off
Dante Domain Manager (DDM) Support: yes
Ethernet Interface Configuration: Switched or
Redundant
Bit Depth: 16, 24, or 32
Sample Rate: 48 kHz
Dante Receiver (Input) Channels: 16
Dante T
ransmitter (Output) Channels: 1
1
Dante Audio Flows: 32; 16 transmitter, 16 receiver
Internal Digital Audio Processing: 32-bit, fixed
Input-to-Output
Audio Processing Latency: <200 uSec
Nominal Input and Output Level: –20 dBFS
Network Interfaces: 2, Primary-PoE and Secondary
Type: 1000BASE-T (Gigabit Ethernet (“GigE”)) per
IEEE 802.3ab (10 and 100 Mb/s not supported)
Power-over-Ethernet (PoE): per IEEE 802.3af
(applicable to Primary-PoE network only)
Microphone Input – Headset:
Compatibility – Headset A: single- or dual-ear broad-
cast-style with dynamic or electret (low-voltage DC-pow-
ered) microphone: pin 1 mic common; pin 2 mic; pin 3
phones common; pin 4 phones left; pin 5 phones right
Compatibility – Headset B: CTIA™/AHJ configuration
(typically uses electret powered mic): tip phones left; ring
1 phones right; ring 2 common; sleeve mic
Type: unbalanced
Impedance:
1 k ohms, nominal, microphone power off;
690 ohms, nominal, microphone power on
Gain: 26, 32, 38, 44, 50 dB, selectable
Frequency Response: –4 dB at 30 Hz, –2.6 dB at 40 Hz,
–1.8 dB at 50 Hz, –2.4 dB at 10 kHz, –3.8 dB at 20 kHz
Distortion (THD+N): <0.09%, measured at –20 dBFS,
22 Hz to 22 kHz bandwidth, 38 dB of gain
Dynamic Range: >93 dB, A-weighted, 26 dB gain
Microphone Input – Gooseneck:
Compatibility: Studio Technologies’ GME-3-12
Microphone Power: 5 volts DC via 4.99 k resistor
Impedance: 3.3 k ohms, nominal
Gain: 12, 18, 24, 30, 36 dB, selectable
Frequency Response: –3.0 dB at 40 Hz, –2.0 dB
at 50 Hz, –2.0 dB at 16 kHz, –3.0 dB at 20 kHz
Distortion (THD+N): <0.04%, measured at –20 dBFS,
22 Hz to 22 kHz bandwidth, 36 dB of gain
Dynamic Range: >97 dB, A-weighted, 12 dB gain
Compressor:
Application: applies to headset and gooseneck
microphone audio
Threshold: 1 dB above nominal Dante output level
(–19 dBFS)
Slope: 2:1
Status LED: compressor active
Headset Headphone Output:
Type: 2-channel (stereo)
Compatibility: intended for connection to stereo
(dual-channel) or monaural (single-channel) headsets
with a nominal impedance of 50 ohms or greater
Maximum Output Voltage: 3.0 V
rms, 1 kHz, 150 ohm
load
Frequency Response: 20 Hz to 20 kHz, +0/–1 dB
Distortion (THD+N): <0.02%
Dynamic Range: >93 dB
Speaker Monitor Output:
Type: single-channel (monaural)
Speaker: 1.3-inch (32 mm) diameter
Maximum Power: 4 watts RMS, nominal
Frequency Response: 150 Hz to 20 kHz, ±3 dB
18 kHz and 20 kHz Tone Outputs:
Type: sine wave
Level: –20 dBFS
Frequency Accuracy: <10 ppm
Distortion: <0.0001%
Call Function:
Receive Frequency: 20 kHz, ±800 Hz, within audio
channel
Receive Level: –27 dBFS minimum
Send Frequency: 20 kHz
Send Level: –20 dBFS
Audible
Alert: 3-burst sequence, 524 Hz, sine wave,
selectable level range