2)
When a calling is answered or made, Production
inform to the operator in order to he take the
line, by pressing the correspondent button on
the console. When the operator takes the line,
the Production can hung the phone.
3)
All calling answered or generated from the cell
phone can be transferred to the console using
the cell phone. For make this, set the Blue-tooth
mode to “Headset” and advise to the operator,
who must press CELL PHONE [3] to put the call
in hold (the caller hear the PGM signal, but is
not on-air).
Note:
If you needs to work with several call in hold
mode while another call is on-air (and the caller waits
hearing the on-air signal) you needs to add an external
hybrid. For this purpose the Solidyne DX mixers have a
special input/output (see 2.2.8 – External Hybrid).
4)
Being one or more phone line buttons pressed,
(in red) press TALK to dialog with the callers.
When TALK is active, the speakers are muted at
the Control Room.
5)
If the operator leave pressed the button TALK,
can dialog in “hands free” mode with the caller,
and listen he on headphones (since loudspeak-
ers are muted to avoid feedback). The level of
the TALK MIC adjust from a preset located next
to the TALK microphone.
6)
To put on-air a phone line, raise the main fader
TELECOM [9].
7)
To hang out a line, first close the main fader and
then release the button of the line. For the case
of CELL PHONE [3] the call is transferred to the
cell phone, and can be re-taken by pressing
CELL PHONE once. To hang out the cell phone,
short touch the button BLUETOOTH [2].
8)
To return a calling to the Production (i.e. to take
note about a listener) the Production must pick
up the phone and then the operator will release
the correspondent button at the console. If the
line is the cell phone, disable the mode “hands
free” at the cell phone to resume the communi-
cation on the cell phone.
The red LED in phone line buttons only lights with
active phone lines. If the line is not connected, the
LINE button not lights.
TAKE IN MIND
Please be careful with the on-air level of the callings. Due to
the analogical hybrids are not perfect, a brief amount of au-
dio sent to the line is not cancelled, returns through hybrid
and mixes to the direct signal (the vocie from studio).
Working with normal levels this effect is not noticeable; but
using high hybrid output level, the voices of the studio can
be distorted (by coloration).
A phone calling not always must achieve 0 VU to equal the
loudness of the voices from the studio. Have in mind that
the LF, that carries greater energy, is not present in the
telephone line, but there is in the voices at the studio. The
lows are those that produce greater deviation in VU ME-
TERS. Nevertheless, for the ear the loudness is defined by
the mid rage frequencies. So that if you note that VU Meter
“peaks lower” with the telephone line that with the voices
from mics on the studio, this not necessarily means that
“it’s listened lower”. On the other hand, the audio proces-
sor of the radio will be in charge to equal both signals, so
you do not leave the VU deceives to you when mix voices
of the floor with telephone calls.
VERY IMPORTANT NOTE
Conference between land lines only are possible if both lines
are of the same public central. The lines can be connected to
the same private telephonic central (be of 24 or 48 volts).
The conference mode IS NOT POSSIBLE BETWEEN DIFFERENT
CENTRALS neither different IP converters.
If the voice of the Studio Talent is colored
when the hybris is
on-air,
(sounds too much mid-lows or flanges); the rejection
factor of the hybrid needs to be adjusted. See “3.2.5 Rejec-
tion factor”.
If the calling at CUE listen distorted, or with excessive ambi-
ence, the level of preset
CUE LEVEL [7] i
s excessive. Atenuate
this level until reach an optimal listening of the MICs at the
Studio.
3.2.2 Return to phone line
Most of the existing telephone hybrids on the market
today, were designed over 30 years ago for analogue
telephone exchanges (PBX) Solidyne hybrids, how-
ever, have been recently designed for private or public
telephone exchanges today, which are fully digital. The
new technology Hybrids are recognized because they
have no control of air return level to phone line. This is
because inside the hybrid Solidyne uses an audio pro-
cessor for return signal that includes AGC, peak limiter
& audio signal filtering. Therefore the return is auto-
matically adjusted during the transmission and its level
is the maximum allowed by the modern digital tele-
phone exchanges.
If you want to check the return level to phone line, you
must use a oscilloscope to be placed in parallel with
the telephone line and must verify that the signal is 2
volts peak to peak.
Please note that above this level the return can pro-
duce problems that will cause intermodulation distor-
tion in the audio signal that goes to air. So in Solidyne
hybrids we use a processed return channel, to avoid
distortion at the on-air signal. There are hybrids man-
ufacturers that maintain the return control level as
they did in the past. This allow operators to adjust "by
hunch" this critic level. This makes the voices of the
reporters and interviewed people distorted or with
coloration.
In Solidyne obviously, we keep a high grade of excel-
lence in the audio quality of the hybrid on-air sound.
And that quality do not depend on the operator set-
SOLIDYNE
DX816 & DX822 - Broadcast mixing consoles
Page 19
