Specifications

Operation Manual
Page 6
Lysar Industries
4.3. PTT Detection
The EQ-Link can detect when the aircraft PTT is activated, this is indicated by
the YELLOW LED going fully on. This can aid in the detection of PTT Faults
and also as a general PTT indication.
On each PTT press a short tone (BEEP) will be heard in the headset and
when PTT is released a short tone (BOP) will also be heard. We call these
comfort tones and they give feedback that you really have pressed and
released the PTT button in the aircraft.
Note: This feature is only available when aircraft’s headset jacks are wired for
PTT
The VHF radio system has override priority and will mute all other ancillary
inputs such as MP3, cell phone UHF etc; when a PTT signal is detected on
this input. Some aircraft may not have this feature configured on the headset
jack and hence this feature will not work.
The feature is also extended to the EQ-Reverse-Link so that the yellow LED
will also indicate active PTT. The EQ-Reverse-Link can also be used to
activate PTT remotely. A standard in-line PTT switch is required. Again this
feature must be wired on the aircrafts headset jacks in order to operate
properly
4.4. MP3 or Cell Phone Interface
The EQ-Link has additional inputs suitable for Cell or MP3 type connections,
these are available on the 3.5mm connector at the end of the EQ Link.
Note: During VHF reception 3.5mm Audio input is muted to the headsets, this
will always enable clear reception of all VHF radio traffic. To stop the phone or
cell being muted, turn on “Phone Mode” in the EQ-Link.
An EQ approved Blue Tooth Module specially designed to suit the EQ1
System is available for Cell interface. When using this module ensure that the
module is mounted at least 400mm away from the EQ Link to avoid RF
interference. Usually the Blue Tooth module should be positioned in an
accessible area of the aircraft.