4 TECHNICAL SPECIFICATIONS
TECHNOLOGY
Active Hybrid with send and return gain, auto-adjusted by audio
limiter and AGC. Balanced telephone lines floating with ground
isolation by Nickel-Ferrite transformers.
VQR System
to improve the audio quality of telephone lines (HL203-
VQ).
AGC OUTPUT LEVEL
Constant level to console, independent from line level due to the
action of the internal AGC. A 15 dB phone level change causes less
than 3 dB change at the Output
Output level control on the front panel. Nominal level +4 dBu, variable
between -60/+8 dBu
Priority:
The speaker at the Studios have priority over the caller,
causing an attenuation fo 12 dB on the incoming call.
TELEPHONIC INPUTS
HL202:
2 lines in conference with croosed gain. The 2 inputs for land
lines or wired cell phone, are isolated and floating with transformer.
HL203-VQ:
Adds a third line through a cell linked by Bluetooth to
avoid physical connections and allow up to 10 meters away. The cell
phone can be operated from HL203, receiving calls.
AUDIO SEND FILTERS
Band-Pass filters in send channel, limits response to 400 – 2.200 Hz
to eliminate on-air sound coloration.
INPUT LEVEL
Audio limiter to operate with signals from -5 to + 8 dBu.
OUTPUT TO CONSOLE
N 4 dBm balanced 600 ohms or hi Z
Adjustable level with needle Vumeter.
Symetric output with XLR-3 connector.
SEND TO PHONE LINE
0 dBm +/- 1 dB, measured over 2 KM artificial phone line
FEQUENCY RESPONCE
250 - 3.400 Hz +/- 1 dB (VQR off)
VQR on (HL203)
: improve the spectrum between 50 – 12.000 Hz
GAIN
Adjustable until 30 dB
HARMONIC DISTORTION
Lower than 0,2 % at the console output at 1 kHz
NIVEL DE RUIDO
S/R better than 75 dBA, measured over 2 KM artificial phone line,
with
VQR. Better than 60 dBA without VQR
HYBRID REJECTION
Better than 40 dB @ send of +4dBu at 1 Khz. Measured over 2 KM
artificial phone line.
SOLIDYNE
Telephonic Hybrids
Page 31
