User manual

TELEPHONE CHANNELS (OXYGEN 3 and 3 ST) ENG
Axel Technology srl www.axeltechnology.com TELEPHONE CHANNELS
(OXYGEN 3 and 3 ST)
23
17 TELEPHONE CHANNELS (OXYGEN 3 and 3 ST)
The Telephone module features a built-in telephone hybrid.
The module features two gain controls, PFL, Master output, hybrid Hook / Ring controls. It
features connections to a regular telephone line (POTS) and to an external standard telephone
set (for example for dialling). Automatic line compensation is also featured.
The audio sent to the telephone caller is a mix-minus (N-1). The mix minus signal is the programme
output signal with the phone signal (caller‟s voice) removed.
The presenter can talk off-air with a caller (whilst the Main programme is being output) via its own
microphone (connected to Channel 1 module).
HOOK button: it allows Line hooking. This switch hooks / hangs up the hybrid from the telephone line.
Hook LED switchs on accordingly. The same LED blinks when a call (ring) is coming in. Please note:
LED glows only if phone line is connected.
SEND: It adjusts in the +/- 12 dB range the level of mix-minus signal which is sent to the telephone
caller.
RECEIVE: It adjusts in the +/- 12 dB range the level of the signal incoming from telephone caller.
MEETING: it allows the RECEIVE signal to be heard also by the other telephone caller.
MASTER: it connects the telephone output to the Master output. The LED inside the button turns on
accordingly.
PFL
Pre-fade listening PFL button (operated only in latched mode) allows a caller to listen to the announcer/DJ
microphone (connected to Channel 1) and to be heard without being in the broadcast (i.e. with the fader closed).
When the PFL button is activated (with MASTER button deactivated):
- 
the channel (Receive) signal will be connected to the PFL output (see also MONITOR Chapter).
- 
the DJ MIC (i.e. the Mic connected to Channel 1 with A/B selection button released) is automatically routed to
the caller for “off-air” (i.e. „Private‟) communications with the engineer or the announcer (regardless of MST
and PFL keys on the Micro 1 channel)
When the MASTER button is activated (regardless of the PFL key):
- 
the Master bus is automatically sent to the caller
- 
the caller is broadcast while Telephone channel fader opened
Note: with MASTER button enabled on Telephone channels, the signal sent to the telephone line (adjustable through
SEND control) will be the sum of the signals coming from each module routed to the Master bus except from the two
Telephone ones. The mutual phone-user listening can only be enabled via the MEETING function (on both the
Telephone modules).
SLIDER ALPS N-type 90° ultra smooth 100 mm sliders are provided on series.
The scale shows the attenuation. Normal operating position is at the top „0‟ mark, providing overall 0 dB of gain. On
request, to notify at order, ALPS K series sliders can be also fitted. The benefit is longer fader life and more reliable
operation.