trig TY91 User manual
TY91 and TY92 VHF Radio
Operating Manual
00840-00-AD
26 November 2014
Trig Avionics Limited
Heriot Watt Research Park
Riccarton, Edinburgh
EH14 4AP
Scotland, UK
© Copyright 2012, 2013, 2014
EN / DE / FR
EN
1
Front Panel
Display
The display shows the primary and standby frequencies and a series
of icons to indicate the operating mode of the radio.
The primary frequency is at the top and the standby frequency is at the
bottom half of the screen. The TX icon shows that the radio is
transmitting. An RX icon shows that the frequency is active and the
audio will be heard through the headphone and speaker outputs. The
standby frequency will only be received during the MONITOR function
which is indicated by a +2 icon when active.
The bottom right hand side indicates what frequency step size is
selected.
On/Off, Volume and Squelch Knob
The left hand knob controls the power to the VHF radio, adjusts the
audio volume, and controls the squelch. Turning this knob clockwise
will switch on the radio and then increase the volume. Turning
anticlockwise will reduce the volume and eventually will click off.
Pressing this knob toggles the automatic squelch on and off, which
can be used to listen for faint stations and as a simple audio test.
Secondary Frequency
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Tuning Knobs
The right hand concentric knobs are used to tune the radio. The large
knob adjusts the MHz portion of the standby frequency, and the
smaller knob adjusts the kHz portion of the standby frequency.
Pressing the end of the small knob changes the channel spacing that
the small knob operates through. If the radio is configured for 8.33
kHz operation, the steps toggle between 8.33 kHz channels and 25
kHz channels. If the radio is configured only for 25 kHz operation, the
steps toggle between 25 kHz and 50 kHz channels.
Changing the step size does not change the behaviour of the radio,
only the tuning knob step size –it helps to quickly tune a frequency.
Flip-flop Button
The flip-flop button swaps the frequency in the standby position into
the active position, and moves the active frequency to the standby
position.
MON Button
The VHF radio includes a dual-frequency listen feature; pressing the
MON button toggles this feature on and off.
When the monitor is active, a +2 icon appears next to the standby
frequency, and the radio will scan between the active and standby
frequencies listening for transmissions. The primary channel has
priority –a transmission on the primary channel will interrupt the
secondary channel. As an aid to identifying which channel is active,
the RX icon will light next to the active channel and the secondary
channel will appear slightly quieter than the primary.
This is useful in an aircraft with only a single radio since it allows you,
for example, to copy the ATIS whilst maintaining a listening watch on
the ATC frequency.
Remote Frequency Database
If a compatible GPS is connected, the controller will be loaded with
airport frequencies from the GPS database. These frequencies are
accessed by pressing the MEM button. The airport frequencies and
selection order are determined by the data sent to the controller from
the GPS.
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The available airports can be scrolled through using the large
frequency select knob. The individual frequencies associated with that
airport can be scrolled through by using the smaller frequency select
knob. After you have stepped through all the loaded airports, or if
there is no GPS attached, the built-in memory of the controller will be
displayed.
In each case the selected frequency is loaded into the standby
position. Pressing MEM again leaves the stored frequency in the
standby window. Pressing the Flip-flop button loads the stored
frequency directly into the active channel.
Note: When the controller is displaying the available airport
frequencies it will not accept any new updates from the GPS
to avoid the frequencies changing during selection. To allow
the GPS to update the available frequency database you must
come out of memory mode by pressing the MEM or flip-flop
button.
Frequency Memory
If no GPS is connected and the MEM button is pressed, or if the large
knob is rotated beyond the remote database the controller will access
the internal quick reference memory. There are 9 quick reference
memory locations and the bottom edge of the screen will display which
memory location is currently selected (1 –9).
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Rotating the small frequency selector knob will step through the
memory locations. The standby frequency window will display the
stored frequency.
To store a frequency in one of the memory locations it must first be
tuned and active as the primary frequency. Press MEM to enter the
memory mode in the usual way. Select the channel you want to
overwrite with the tuning knobs. Now press, AND HOLD, the MEM
button for 2 seconds. The current active frequency will be moved to
the selected memory location, overwriting the existing contents.
Intercom Function
The TY91/TY92 radio has a built in intercom which can be installed as
permanently engaged or selected via a switch. The intercom is voice
activated and the audio is routed through to both of the headsets. The
intercom squelch and volume can be adjusted independently from the
radio function through the configuration menu.
Stuck Mic
If the PTT switch is stuck in the ON or transmit position, the radio will
automatically cut out after 35 seconds as a safety measure.
Configuration Mode
Additional setup items can be accessed by holding down the MON
button for 5 seconds. The menu options can be selected using the
larger inside tuning knob and the parameter value can be altered using
the smaller outside tuning knob.
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Intercom Volume
Sets the intercom volume level
Intercom Squelch
Sets the sensitivity of the intercom voice operated
squelch
AUX In Volume
Sets the volume level of the auxiliary input
AUX In Mute
Mutes the auxiliary audio when a VHF transmission
is received by the radio
Sidetone Volume
Sets the volume level of sidetone heard when
transmitting
Radio Squelch
Sets the sensitivity of the radio squelch
Enable 8.33 kHz
Sets the frequency step size to 8.33/25 kHz or
25/50 kHz
Brightness
Sets the LCD backlight brightness
Dual Control Operation
If two control heads are installed for a dual control setup then changes
made to one controller will be automatically updated on the second
controller. There is a small time lag between operating one controller
and updating the display on the second controller. This is purely a
delay in the display and there is no delay in the tuning or operation of
the TY91/TY92 radio.
The exception is that the radio volume knob works on a “loudest wins”
basis. The radio volume will always correspond to the control head
that has the volume knob set to the highest position. This means that
only one of the controllers needs to be turned up to operate the radio
normally, for example when flying a tandem aircraft solo.
Dual Control Individual Functions
The following functions are local to the individual control head and will
not automatically update or transfer between two controllers:
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Frequency Step Size
Changing the frequency step size by
pressing the PUSH/STEP button on one
controller does not affect the other controller.
Brightness
The brightness is separately adjusted on
each controller.
Memory
The frequencies stored in the memory are
local to each controller. The memory data is
not transferred between controllers, although
a frequency selected from the memory will
appear on the screen on the other controller.
General Low Temperature Operation
The TY91/TY92 is certified to operate correctly down to -20°C, but at
low temperatures the controller display may be impaired. On a cold
day you may need to wait for the cockpit to warm up to ensure normal
operation.
Warning Messages
If the VHF radio detects a problem, the screen will indicate WARNING
and a brief statement of the problem. Depending on the nature of the
problem, your VHF radio may not be working properly. Note the
message on the screen and pass that information to your avionics
maintenance organisation. Press the flip-flop button to clear the
message.
The following warnings may be seen:
Remote Hot
The remote radio is overheating.
Stuck Mic
The PTT switch has been closed for more than 35
seconds.
Low Volts
The aircraft power input is below 10 volts (TY91) or
16 volts (TY92).
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No Radio
Connection between the controller and the remote
radio has been lost.
Radio Fault
The remote radio is reporting an unspecified fault.
Fault Annunciation
If the VHF radio detects a catastrophic internal failure, the screen will
indicate FAULT and a brief statement of the problem. Note the FAULT
message at the bottom of the screen and pass that information to your
avionics maintenance organisation. The fault may be cleared by re-
cycling the power to the radio but if the fault is still present the
message will reappear.
Dual Control Warnings and Fault Annunciations
In a dual control head installation, any warning or fault annunciation
will be displayed on both controllers. If one of the controllers suffers a
failure, the second controller may still continue to control the radio.
The fault should be investigated and rectified as soon as possible. It is
not advisable to continue to operate a dual control setup with only one
controller operational.
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Bedienelemente
Anzeige
Die Anzeige zeigt die Primär- und die Standby-Frequenz sowie eine
Reihe von Symbolen an, die den Betriebsmodus des Funkgeräts
angeben.
Die Primärfrequenz steht in der oberen Hälfte des Bildschirms, die
Standby-Frequenz in der unteren Hälfte. Das Symbol TX zeigt an,
dass das Funkgerät sendet. Das Symbol RX zeigt an, dass die
entsprechende Frequenz aktiv und das Audiosignal über die Headset-
und Lautsprecherausgänge zu hören ist. Die Standby-Frequenz wird
nur im DUAL WATCH Modus empfangen, der bei Aktivierung durch
das Symbol +2 angezeigt wird.
Unten rechts in der Anzeige wird angegeben, welches Kanalraster
gewählt wurde.
Knopf für Ein/Aus, Lautstärke und Squelch (Rauschsperre)
Der Knopf auf der linken Seite schaltet das VHF-Funkgerät sowie die
Rauschunterdrückung ein und aus und regelt die Lautstärke des
Audiosignals. Durch Drehen des Knopfes nach rechts wird das
Funkgerät eingeschaltet und dann die Lautstärke erhöht. Die Drehung
nach links senkt die Lautstärke und schaltet das Funkgerät schließlich
mit einem Klick aus.
Nebenfrequenz
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