Especificaciones Técnicas
Technical Specifications
DH400 Digital Hybrid
Features & Technology
Digital Hybrid with DSP echo cancellation , auto-adjusted levels of transmission and returns by audio limiters and AGC.
Acoustic echo cancellation.
Auto answering system
Speakerphone hands free for conference rooms
and radio auditorium
PC Remote control system. It works over a LAN network
Recording mode with auto-answering and
separate outputs for 4 lines
VQR system for restoration of original voice quality
Phone lines
4 phone lines in conference,
with cross gain between them.
Cell phones: One phone line can accept a cell phone
Control by AGC
Output console with a constant level independent of the telephone line, by audio limiter and Digital AGC.
20 dB variation on the phone line produce less than 1.5 dB at the output to console
Input level
Audio send to remote caller has audio limiter and band pass filtering to operate with input signals
between –5 dBu and +8 dBu
Echo Cancelation
Typical 45 – 60 dB of echo cancelation,
using four DSP devices.
DSP Parameters
DSP echo cancelation parameters are factory loaded for quick use of DH400. But all parameters can be modified by the user, using LCD display
Sending level to phone line
-0 dBm +/- 1 dB, measured with 2 km artificial line
Send Filters
Band-Pass filters in send channel, limits response to
400 – 2.200 Hz for canceling on-air sound coloration.
Output Level
+4 dBu balanced.
Measured Over 600 ohms or high-Z
Studio Speaker: 0 dBm
Cue Output/Speakerphone: -10 dBm
Frequency Response
200 – 3750 Hz +/- 3 dB without VQR
Using VQR it restores audio spectrum
between 50 – 12,000 Hz
GAIN
Auto-adjustable from 0 to 25 dB, depending on line level
Harmonic Distortion
Less than 0.1% @ 1 kHz, at balanced output
NOISE
S / N over 60 dBA, measured with artificial line 2 km
More than 75 dBA using VQR
Hybrid Rejection
Over 60 dB. Measured with artificial line 2 km
Line Isolation
balanced and floating line inputs with the processor. Isolation 250 V AC
Overload Safety
2 KVolt protection against lightning discharge using SIOV technology
POWER
220 / 115 V, 50/60 Hz with a switch.
Consumption: less than 20 VA
Dimensions
Rack mount 19”, One module high (44,4 mm)