Funkwerk ATR833-LCD Operation And Installation

Operation and Installation

(Dokument-Nr. 01.1404.010.71e)

P/N 833-(3xx)-(3xx

)

ATR833 - LCD

VHF Communication

Transceiver

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

2Document-No.: 01.1404.010.71e / Revision: 1.01

Change History

Revision Date Description of Change

1.00 22.06.2012

FAV – First Release new LCD-Generation
(2-Knob-HMI)-

Extended control menue Sw V7.0

1.01 10.06.2013 Information about dual-watch-operation

List of the Service Bulletins (SB)

Serv

ices bulletins are to be inserted in the manual and to be put down

in this table.

SB Number

Rev.
No. Issue Date Entry Date Name

Survey of Variants

Part Number Description

P/N 833-(300)-(300) New LCD-Generation – 2-knob-HMI
P/N 833-(301)-(310)

New housing variant (weight reduction) and
new SW V7.2

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

3 Document-No.: 01.1404.010.71e / Revision:

1.01

CONTENTS

1

GENERAL ..................................................................................................................................... 5

1.1 S

YMBOLS

................................................................................................................................... 5

1.2 A

BBREVIATIONS

.......................................................................................................................... 5

1.3 C

USTOMER SUPPORT

................................................................................................................. 6

1.4 F

EATURES

.................................................................................................................................. 6

2

OPERATION ................................................................................................................................. 7

2.1 C

ONTROLS

................................................................................................................................. 7

2.2 ON/OFF .................................................................................................................................... 9

2.3 D

ISPLAY

..................................................................................................................................... 9

2.4 B

ASIC SETTINGS

....................................................................................................................... 11

2.4.1 VOL - Volume ............................................................................................................... 12

2.4.2 SQL - Squelch .............................................................................................................. 12

2.4.3 DIM – Backlight ON/OFF ............................................................................................. 13

2.4.4 VOX – Voice Detection (Speech Threshold for Voice Activated Intercom) ................. 13

2.4.5 DWM – Dual Watch Volume Reduction ....................................................................... 14

2.4.6 INT - Intercom-Volume ................................................................................................. 14

2.4.7 EXT - Volume of the External Audio Input ................................................................... 15

2.5 F

REQUENCY SETTING

............................................................................................................... 16

2.5.1 Automatic 8.33 / 25 kHz Channel Width Selection ...................................................... 16

2.5.2 Manual Frequency Input .............................................................................................. 16

2.5.3 Recall a Frequency from the User Memory ................................................................. 17

2.5.4 Recall a Frequency from the List of the 10 Last Used ................................................. 18

2.5.5 Store a Frequency into the User Memory .................................................................... 18

2.6 D

UAL WATCH OPERATION

......................................................................................................... 20

2.7 T

RANSMISSION

......................................................................................................................... 22

2.8 R

ECEPTION

.............................................................................................................................. 22

3

CONFIGURATION ...................................................................................................................... 23

3.1 SPC – C

HANNEL SPACING

........................................................................................................ 23

3.2 CON - C

ONTRAST

.................................................................................................................... 24

3.3 DPY – E

NERGY SAVING MODE (AUT. DISPLAY DARKENING

) ....................................................... 24

3.4 PTT-B

UTTON SELECTION

......................................................................................................... 25

3.5 EXT – E

XTERNAL AUDIO INPUT’S BEHAVIOR

.............................................................................. 26

3.6 M

ICROPHONE INPUT SENSITIVITY

.............................................................................................. 27

3.6.1 MLS – Standard Microphone Pilot/Left ........................................................................ 27

3.6.2 MLD – Dynamic Microphone Pilot/Left ......................................................................... 27

3.6.3 MRS – Standard Microphone Copilot/Right ................................................................. 27

3.6.4 MRD – Dynamic Microphone Copilot/Right ................................................................. 27

3.7 TST – T

EST MODE

................................................................................................................... 29

3.8 M

ASTER RESET

........................................................................................................................ 29

4

INSTALLATION .......................................................................................................................... 30

4.1 A

DVICES AND TIPS

.................................................................................................................... 30

4.2 T

ELECOMMUNICATION DATA

...................................................................................................... 30

4.3 S

COPE OF DELIVERY

................................................................................................................. 30

4.4 U

NPACKING AND INSPECTING THE EQUIPMENT

........................................................................... 31

4.5 M

OUNTING

............................................................................................................................... 31

4.6 E

QUIPMENT CONNECTIONS

....................................................................................................... 32

4.6.1 Microphone-Connection ............................................................................................... 32

4.6.2 Headset-Connection .................................................................................................... 32

4.6.3 Audio-Input ................................................................................................................... 33

4.6.4 Remote Control Panel .................................................................................................. 33

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

4Document-No.: 01.1404.010.71e / Revision: 1.01

4.7 W

IRING

.................................................................................................................................... 34

4.7.1 Conductor Cross Section ............................................................................................. 34

4.7.2 Connector – Pin Allocation ........................................................................................... 34

4.7.3 Wiring with Cable Harness BSKS833S/BSKS833D .................................................... 36

4.8 A

NTENNA

................................................................................................................................. 38

4.8.1 Antenna Selection ........................................................................................................ 38

4.8.2 Installation Recommendation ....................................................................................... 38

4.9 M

ICROPHONE / INTERCOM SETTINGS

......................................................................................... 39

4.10

P

OST-INSTALLATION CHECK

................................................................................................. 39

4.11

D

RAWINGS

.......................................................................................................................... 40

4.11.1 Dimensions ................................................................................................................... 40

4.11.2 Mounting Advices ......................................................................................................... 40

5

APPENDIX .................................................................................................................................. 42

5.1 F

REQUENCY/CHANNEL-PLAN

.................................................................................................... 42

5.2 T

ECHNICAL DATA

...................................................................................................................... 43

5.3 E

NVIRONMENTAL CONDITIONS

................................................................................................... 45

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

5 Document-No.: 01.1404.010.71e / Revision:

1.01

1 GENERAL

This manual contains information about the physical, mechanical and
electrical characteristics, as well as information about installation and
operation of the aeronautical VHF voice radio ATR833.

1.1 Symbols

Advices whose non-observance can cause radiatio

n

damage to the human body or ignition of combustible

materials.

Advices whose non-

observance can cause damage to the

device or other parts of the equipment.

Information

1.2 Abbreviations

Abb. Name/subject Definition
DIM Dimming Display Brightness
EXT External audio input Volume of external audio signal
INT Intercom Volume of board-internal intercom
MIC Microphone
PTT Push-To-Talk Key to activate radio transmission
SEL Selection
SQ Squelch Noise suppression radio reception
VOL Volume Volume of radio reception
VOX Voice activation Volume threshold for voice-

activated

intercom

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

6Document-No.: 01.1404.010.71e / Revision: 1.01

1.3 Customer Support

In order to facilitate a rapid return of shipments in case of repairs, please
follow the instructions of the input guide “Reshipment RMA” provided at
the Service-Area within the Funkwerk Avionics web portal
www.funkwerk-avionics.com.

Any suggestions for improvement of our manuals are

welcome. Contact: [e-mail].

Information on software updates is

available at Funkwerk

Avionics.

1.4 Features

• VHF communication transceiver with 6W output power in 57 mm
format

• Frequency range 118,000 to 136,975 MHz

• Automatic selection of 8,33/25 kHz channel spacing

• 4 microphone inputs (2 x standard, 2 x dynamic)

• Voice controlled intercom for up to 4 microphones, can be

deactivated for use with external intercom

• Dual-watch technology, simultaneous monitoring of two
frequencies

• Auxiliary audio input

• Memory for up to 100 user-definable named frequencies

• User-defined frequency list exportable/importable to/from PC (via

RS232) - PC software available at www.funkwerk-avionics.com

• Easy recall of the 10 last used frequencies

• LCD display for best readability under all conditions

• Configurable energy saving

To avoid unintentional permanent transmission, the
transmitter automatically stops transmission after two
Minutes of uninterrupted operation.

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

7 Document-No.: 01.1404.010.71e / Revision:

1.01

2 OPERATION

2.1 Controls

CHANGE

Swap active
and standby
frequency

DW

Activate /
Deactivate
dual watch
reception of
standby
frequency

SET

Short press:
Choose item to be adjusted
with

Very long press:
Access configuration menu

FREQ

Rotary knob

Change underlined
value

VOL/SEL

Rotary knob

Adjust value or select item given within
the display's lower left corner:

Chosen with SET :
adjust VOLume, squelch, etc.

Chosen with MEM :
SELect item from list of frequencies

C

URSOR

Short press:
Set underline to select
which value to be
changed with

Long press:
In MEM only: add name
to memory item

MEM

Short press:
Access user
frequency memory /
list of last used
frequencies

Long press:
In MEM only: store
frequency/name

Use together to adjust volume, squelch or other setting

Use together to change standby frequency

ON/

OFF

(Radio must
be on)

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

8Document-No.: 01.1404.010.71e / Revision: 1.01

I/O

ON/OFF

Switch On press button for approx. 0.5 s
Switch Off press button for approx. 2 s

DW

DUAL
WATCH

Activates/deactivates the mode for mutual

reception of standby frequency
(display shows DW instead of SBY)

SET

SET

1. Choose item VOL, SQ, VOX, DIM etc.
(each adjusted by )
press button shortly

2. Shortcut to volume setting
press button for at least 1.5 seconds

3. Enter configuration menu
press button for at least 5 seconds

►

CURSOR

1. Move underline within standby frequency,

to be adjusted by
press button shortly

2. Add name to frequency within memory

press button for at least 1.5 seconds

▲▼

CHANGE Swap active and standby frequency

MEM

MEM

1. Access user defined frequency list (MEM

list).  press button shortly once

2. Access list of 10 last used frequencies

(LST list)  press button shortly twice

3. Store active frequency to selected memory

(only for MEM list)
 press button for at least 1.5 seconds

VOL / SEL
Rotary
Knob

1. Adjust volume or other item selected by

SET (VOL, SQ, VOX, DIM etc.)

2. Select frequency from user memory or list
of last used frequencies

FREQ
Rotary
Knob

Change the underlined value

(i.e. adjust standby frequency, or input

character when entering name)

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

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1.01

2.2 ON/OFF

Turn the device on with I/O
ON: I/O press button for 0.5 s
OFF: I/O press button for 2 s
After turning-on the display shows the software version as follows:

(Example)

Device Name
ATR833

Software-Version
e.g. v7.0

The Start Screen indicates device type and software version. After that
screen the device changes into normal operation (direct input mode).

The radio starts with the same frequencies and settings from before
being switched off.

2.3 Display

ATR833
v7.0

118.000

124.910

ACT

SBY

VOL 03

RX

ABCDEFGH

BAT

RX

Cursor marking:
Set position with ► , adjust

value with

Use of standby

frequency:
RX = receiving
in dual watch
mode

Item chosen by

SET , or when

accessing
frequency list:
Adjust value or
select number
with

Low Battery warning

User-defined name, when
selecting frequency from
user memory

Use of active frequency:
TX = transmitting
RX = receiving
Te = timeout (solve and push
PTT to re-enable transmissions)

Fixed label for
active frequency

Label for standby
frequency:
DW = dual watch active
SBY = no dual watch

Standby
frequency

Active
frequency

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

10Document-No.: 01.1404.010.71e / Revision: 1.01

Display Meaning Remark

ACT Fixed label for active

frequency

SBY Label for standby frequency,

when no dual watch
activated

Dual watch mode allows
intermittent monitoring of
standby frequency activity

DW Label for standby frequency,

when dual watch mode
activated

Dual watch mode allows
intermittent monitoring of
standby frequency activity

118.000 Active Frequency Frequency used for
transmissions and
receptions

124.910 Standby frequency May be monitored in dual
watch mode

RX Receiving on this frequency Usually on active frequency;

can also happen on standby
frequency when dual watch
activated

TX Transmitting on active

frequency

PTT pressed

Te Transmission ended

automatically after 2
minutes continuous
transmission

Press PTT shortly to
re-enabel transmissions

VOL 03 Volume level for receiving
SQL 03 Squelch level Radio signal strength

threshold required for
reception; suppresses noise
and weak/distant transmitter

DIM ON Display brightness

Turns the backlight on or off

VOX 05 Vox level Speech level that activates

the intercom

DWM -2 Dual watch mute Reduction in volume for

dual-watch-reception on
standby frequency

INT 04 Intercom volume

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

11 Document-No.: 01.1404.010.71e / Revision:

1.01

Display Meaning Remark

EXT 02 Volume of external audio-

signals

Set to 00, if no external
device attached, to prevent
noise pickup

MEM 00 Item from user memory Substitutes standby

frequency; can have name, if
provided by user. Active
frequency can be stored into
this entry with long press on

MEM

LST 00 Item from list of last used

frequencies

Substitutes standby
frequency

ABCDEFG User-provided name for

frequency within user
memory

Displayed while selecting
from user memory, when the
user has provided a name
for this specific memory
entry

BAT Very low supply voltage Transmission only with

reduced power possible
(decreased radio range!)

F1 … F7 Internal failure Device must be sent back to

the manufacturer

2.4 Basic Settings

To choose between the following settings, use the SET button:

0. VOL ...... Volume (chosen by default)

1. SQL ...... Squelch

2. DIM ....... Backlight ON/OFF

3. VOX ...... Speech level required to activate the intercom

4. DWM ..... Dual watch mute

5. INT ........ Intercom volume

6. EXT ....... Volume of external audio signals

…. back to Volume
The return to the default display (VOL) is carried out by a long press of

SET or happens automatically after 12 seconds of inactivity)

The chosen setting can be adjusted by the

rotary knob.

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

12Document-No.: 01.1404.010.71e / Revision: 1.01

2.4.1 VOL - Volume

Can be reached by a long press of the SET button, but is also
automatically chosen by the radio after 12 seconds of user inactivity.

Adjusts the volume of received radio signals by turning the
knob. The higher the value, the louder the reception of radio signals.

ACT

123.450

SBY

118.910

VOL 03

2.4.2 SQL - Squelch

By shortly pressing the SET key once, with the help of the
rotary knob the squelch level can be adjusted. (Note: This is not related
in any way to the intercom functionality.)

This is a threshold that has to be exceeded by radio signal levels from
other transmitters, in order to activate the reception circuitry. The higher
the number, the stronger the radio signals have to be in order to be
received.

ACT

123.450

SBY

118.910

SQL 07

The setting for the squelch depends on different factors. For motor
aircrafts an initial higher setting is typically appropriate, gliders may use a
lower value. A lower number means higher input sensitivity. This allows
reception of weaker signals (radio stations at higher distance), but can
also result in pickup of own-aircraft radio interference sources (engine,
strobe lights).

The VOL setting controls the volume of received radio
signals only, not the volume of the intercom or the external
audio input – these are set separately with INT and EXT .

Range: 01 – 16

Range: 01 - 10

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

13 Document-No.: 01.1404.010.71e / Revision:

1.01

2.4.3 DIM – Backlight ON/OFF

By shortly pressing the SET key twice, with help from the
rotary knob the backlight of the display can be switched on and off.

ACT

123.450

SBY

118.910

DIM ON

2.4.4 VOX – Voice Detection (Speech Threshold for Voice
Activated Intercom)

By shortly pressing the SET key three times, with the help of the

rotary knob, the threshold volume VOX for intercom voice
detection can be adjusted. (Note: This is not related in any way to radio
reception or squelch.)

VOX defines the crew’s speech volume that is required to activate the
intercom functionality. The higher the value, the louder you need to
speak in order to activate the intercom.

Exception: VOX 01 corresponds to “always on”
The internal filter circuitry has the ability to distinguish between engine

noise and speech.

ACT

123.450

SBY

118.910

VOX 05

In case of very noisy backgrounds or use of uncompensated
microphones, the automatic VOX functionality may not work satisfyingly.
In these cases, it is possible to deactivate the VOX automatism with VOX
01, and to use an external intercom-switch.

The default Squelch setting is 05. At higher values, weak

signals could be suppressed.

Range: 01 – 10

Range: ON – OFF

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

14Document-No.: 01.1404.010.71e / Revision: 1.01

2.4.5 DWM – Dual Watch Volume Reduction

By shortly pressing the SET key four times, with help from the

rotary knob the lowering of the volume level (“mute”) for
receptions on the standby frequency (when having dual watch active)
can be controlled. This allows acoustic distinction between both
frequencies.

For further information about the dual watch mode see 2.6.

ACT

123.450

SBY

118.910

DWM -2

2.4.6 INT - Intercom-Volume

By shortly pressing the SET key five times, with help from the

rotary knob the intercom volume level can be controlled.

The intercom functionality is the on-board crew-internal communication
for multiple-seated powered aircraft.

The intercom can be activated

• automatically whenever someone speaks into a microphone (i.e. voice

activated intercom = VOX, see 2.4.4).

• manually by use of an external intercom switch.
The higher the value, the higher the intercom volume.

ACT

123.450

SBY

118.910

INT 03

If the intercom is deactivated by cabling, the intercom

volume cannot be adjusted. The radio indicates this by

displaying INT --

Range: -8 – 00

-8 is highest muting (dual watch reception at much lower volume)
00 is no muting (dual watch reception at same volume)

Range: 01 – 10

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

15 Document-No.: 01.1404.010.71e / Revision:

1.01

2.4.7 EXT - Volume of the External Audio Input

By shortly pressing the SET key six times, with help from the
rotary knob, the volume from the connected external audio signals
(Warning tones, music, etc…) can be set.

The higher the value, the higher the volume of the external audio signal.
A value of 00 deactivates the external audio input.

ACT

123.450

SBY

118.910

EXT 03

When no other device is connected to the external audio

input, the input should be muted by selecting 00, in order to

prevent noise by pickup of on-board interferences.

The priority of the external audio input in

comparison to radio

receptions can be configured, see 3.5.

Range: 00 - 10

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

16Document-No.: 01.1404.010.71e / Revision: 1.01

2.5 Frequency Setting

Frequency setting is always done by the two steps of

1. entering a new standby frequency to the desired value, and then

2. interchanging the new standby frequency and the previous active
frequency by using ▲▼ .

Entering a new standby frequency can be done by

a) manual input,
b) recall of previously stored frequencies from the user memory, or
c) recall from the list of the last 10 used frequencies.

2.5.1 Automatic 8.33 / 25 kHz Channel Width Selection

Whether a frequency is used with channel width 8.33 kHz or 25 kHz, is
automatically determined by the value of the frequency entered, and
requires no additional user activity.

The numbering scheme that is used for distinction of the two channel
widths is internationally standardised by the ICAO, and consistently used
in official documents (like e.g. VFR navigation charts) as well as in the
voice phraseology used by ATC radio communication.

Channels used with 25 kHz width are entered in multiples of 25kHz:

123.500, 123.525, 123.550, 123.575, 123.600 etc. These are compatible
with the old 25kHz-only radios. To use the same frequencies with

8.33kHz width, the frequency values entered are increased by 5kHz:

123.505, 123.530, 123.555, 123.580, 123.605 etc.
For more detailed information please refer to chapter 5.1 – but as said

above, for correct channel width selection this knowledge is not required.

2.5.2 Manual Frequency Input

The standby frequency is input by

• selecting with the ► button which part of the frequency to
change, and

• changing the selected part with the

rotary

knob.

The selected part of the frequency is marked with the underline.

▲▼ interchanges the newly set standby frequency and the former active

frequency.

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

17 Document-No.: 01.1404.010.71e / Revision:

1.01

When having the channel selection configured for 8.33 kHz steps (see

3.1), the frequency is input in three steps:

123

.450

→ 123.

4

50

→

123.4

50

When having the channel selection configured for allowing 25 kHz
channels only (see 3.1), the frequency is input in two steps:

123

.450

↔ 123.

450

2.5.3 Recall a Frequency from the User Memory

To access the user memory frequency list, press MEM once, and select
one of the 100 memory entries with the turn knob.

The selected memory entry substitutes the former standby frequency.
In the lower row of the display, the number of the memory entry selected

is indicated by [MEM xx] (with xx = 00 … 99); if a name has been
provided by the user for this memory entry, it is displayed next to the
memory entry number.

ACT

123.450

SBY

121.270

MEM 17 HAMBURG

▲▼ interchanges the newly set standby frequency and the former active

frequency, and leaves the memory list menu.
If no input is done for 12 Seconds, the device returns to the standard

view, too.

In order to speed up the entering of new frequencies, it is

possible to configure the radio to allow entering of those

frequencies only that are used with 25 kHz channel width.
Please refer to chapter 3.1 for information on th

is

configuration.

However, when choosing this option, please keep in mind to

re-enable 8.33 kHz channel selection before

flying into areas

where 8.33 kHz channels are used.

Entry number (Range: 00 – 99)

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18Document-No.: 01.1404.010.71e / Revision: 1.01

2.5.4 Recall a Frequency from the List of the 10 Last Used

The radio automatically keeps track of the last 10 used active
frequencies. To access this list, press MEM twice, and select one of the
10 list entries with the turn knob. The selected memory entry
substitutes the former standby frequency.

The number of the selected list entry is given in the display’s lower row.

ACT

123.450

SBY

118.700

LST 01

Key ▲▼ interchanges the newly set standby frequency and the former
active frequency, and leaves the last used list menu.

If no input is done for 12 Seconds, the device returns to the standard
view.

2.5.5 Store a Frequency into the User Memory

The active frequency can be stored into any entry of the user memory.
This is achieved by a long press on MEM when having the user

memory entry to be overwritten selected.
The following example stores the frequency 124.350 MHz of KONSTANZ

into the user memory entry 07:

List entry „00“ contains the last standby frequency from the

MEM menu.

Entry number (Range: 00 – 10)

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Operation and Installation

19 Document-No.: 01.1404.010.71e / Revision:

1.01

Step • Display (Example)

1. Have frequency to be stored set
as active frequency

ACT

124.350

SBY

135.700

VOL 03

2. Enter memory list:
Press MEM once shortly in order to

access the user memory. (This
overwrites the former standby
frequency.)

ACT

124.350

SBY

122.000

MEM 00 KEMPTEN

3. Select the memory position to be used
with

ACT

124.350

SBY

121.270

MEM 07 HAMBURG

4. Overwrite the selected memory entry
with a long press of MEM .

ACT

124.350

SBY

124.350

MEM 07

You can now leave the user memory access by pressing MEM twice or
by waiting for the timeout.

Alternatively, you can add a name of up to 8 characters to the

selected memory entry:

While having the memory entry
selected, i.e. coming from step 4 above
when adding the name to the new
stored frequency, or else coming from
step 3 above when adding the name to
an existing memory entry:

5. Place the cursor into the name field
with a long press of ►

ACT

124.350

SBY

124.350

MEM 07

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

20Document-No.: 01.1404.010.71e / Revision: 1.01

6. Enter the name

• by changing the selected character with

, and advancing the selection with

► , just as when manually entering a

standby frequency.

ACT

124.350

SBY

124.350

MEM 07 KONSTANZ

7. Store the name

• either with a long press of MEM ,

• or with a long press of ► .

ACT

124.350

SBY

124.350

MEM 07 KONSTANZ

You can now leave the user memory access by pressing MEM twice or
by waiting for the timeout (12 seconds).

2.6 Dual Watch Operation

The ATR833 comprises one receiver, therefore DUAL-Watch
(simultaneously monitoring two frequencies) is implemented by
alternating automatically between the active and the standby frequency.

With dual watch mode active, basically the standby frequency is tuned in,
shortly interrupted in regular intervals by tuning in the active frequency
for a fraction of a second.

Every then detected radio signal on the active frequency has priority, and
pauses the dual watch monitoring of the standby frequency, as long as
the reception/transmission continues on the active frequency.

Transmissions are always done one the active frequency.
The dual watch mode is activated by pressing DW , and indicated by a

changing the “SBY” label for the standby frequency to “DW”.

ACT

123.450

DW

135.700

VOL 05

The dual watch mode is deactivated by pressing DW again, and by any
operations changing either of the frequencies.

ATR833-LCD / P/N 833-(3xx)-(3xx)

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21 Document-No.: 01.1404.010.71e / Revision:

1.01

In order to have an audible distinction between receptions on the active
and the standby frequency, it is possible to receive the receptions from
the standby frequency with a lower volume. Please refer to chapter 2.4.5
for information onto this feature “dual watch volume reduction”.

Quick approach:

• Select or enter a standby frequency which shall be additionally
monitored.

• Set SQL with the SET key and the

rotary knob to a value

of at least 02.

• Activate dual watch with DW (DW is shown)

• As soon as no reception is determined on the active frequency, the

mutual monitoring between active and standby frequency starts.

• In order to deactivate dual watch: press DW once more or change
the frequency.

SQL has to be set to 02 at least, as without proper squelch

functionality the radio would not be able to detect whether on

the active frequency a reception takes place.

Don’t forget to intercha

nge the active and standby

frequencies, before answering a call on the standby

frequency.

Using dual-

watch requires switching between the active and

the standby frequency.

Therefore it may happen that calls

on the active frequency cannot be monitored c

ompletely. As

the result we recommend not to use dual-

watch in airspaces

where listening watch is required.

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2.7 Transmission

By pushing the PTT button, the device starts transmission on the active
frequency. The operation of the transmission is indicated by “TX” in front
of the frequency used.

ACT TX 123.450
SBY

135.700

VOL 05

In order to avoid unintended transmissions, e.g. when having the PTT
button stuck (“stuck mic”), the transmitter automatically stops after two
minutes of transmission, and „TX“ is substituted by „Te“.

In order to re-enable transmission in this case, release PTT and push it
again.

2.8 Reception

When receiving, a „RX“ is shown in front of the active frequency. When
having dual watch active (see 2.6) this can be on the standby frequency,
too.

ACT RX 123.450
SBY

135.700

VOL 05

ACT

123.450
DW RX 135.700
VOL 05

When having more than one PTT button and microphone

equipped, it can be configured (chapter 3.4

) to use only one

PTT button for transmissions.

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3 CONFIGURATION

A very long press of SET (5 seconds) accesses the configuration
menu. The configuration menu is used for fundamental settings.

To choose between the following settings, use the SET button:

1. SPC .... Channel spacing

2. CON ... Contrast

3. DPY .... Automatic display darkening

4. PTT .... PTT key selection

5. EXT .... Behavior of the external audio input

6. MLS .... Sensitivity of the left standard microphone input

7. MLD ... Sensitivity of the left dynamic microphone input

8. MRS ... Sensitivity of the right standard microphone input

9. MRD ... Sensitivity of the right dynamic microphone input

10. TST .... Activation/deactivation of the test mode (for maintenance)

… Leaving configuration menu / back to VOL

(can also be reached by long press of SET )

The chosen setting can be adjusted by the

rotary knob.

3.1 SPC – Channel Spacing

With this setting, the ATR833 can be configured to constrain frequency
selection to 25 kHz channels only. This can be used to speed up the
manual frequency input in areas where no 8.33 kHz channel spacing is
used.

See chapter 2.5.2 on further information on manual frequency input.

ACT

123.450

SBY

118.910

SPC 8.33 kHz

With the

rotary knob the following options can be selected:

8.33 kHz Allows input of both 8.33 kHz and 25 kHz channels
25 kHz Allows input of 25 kHz channels only.

A short press of SET switches to the next configuration item, a long
press of SET exits the configuration menu.

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3.2 CON - Contrast

After pressing the SET key twice the contrast of the display can be
adjusted with the rotary knob.

ACT

123.450

SBY

118.910

CON 07

3.3 DPY – Energy Saving Mode (Aut. Display Darkening)

In order to save energy – and to extend the lifetime of the OLED display
– an automatic display darkening can be configured.

ACT

123.450

SBY

118.910

DPY always on

With the

rotary knob the following options can be selected:
always on No display darkening at all
xx min off Automatic darkening after xx minutes of user

inactivity (xx = range 1–30)

Reactivation of the darkened display is done by press of any key (except
key I/O

)

or turn of any knob (the action of the key pressed is performed

This configuration item is not used for determining wh

ether a

specific frequency is used with 8.33 kHz or 25

kHz channel

width, as this is done by the ATR833

automatically

depending onto the frequency value entered.
For more details see chapters 2.5.1 and 5.1.

Please keep in mind to enable 8.33

kHz channel selection

before flying into areas where 8.33 kHz channels are used.

Range: 01 – 10

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when pressing the key again after the display turned on) or when
transmitting.

A short press of SET switches to the next configuration item, a long
press of SET exits the configuration menu.

3.4 PTT-Button Selection

In case of using two external PTT buttons, this configuration item can be
used to deactivate one PTT button – and the associated microphone(s) –
from enabling transmission.

ACT

123.450

SBY

118.910

PTT all mics

With the

rotary knob the following options can be selected:

all mics Both PTT buttons and all microphones are used for

transmissions, no matter what PTT button was
pressed

single mic According to the PTT button pressed, the associated

microphone is activated

left only Only the left PTT button and the left microphone(s) are

used for transmissions

right only Only the right PTT button and the right microphone(s)

are used for transmissions
The intercom functionality is not affected by this setting.
A short press of SET switches to the next configuration item, a long

press of SET exits the configuration menu.

This feature should only be used when

• it can be foreseen that no frequency changes will be

required (i.e. when using only limited airspace near one

airport, e.g. for circuit pattern training flights), and

• the crew is familiar with the energy saving mode.

In all other cases this feature shall be deactivated, in order to

prevent the usage of wrong frequencies and to avoid

confusion of pilots not aware of the energy saving mode.

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3.5 EXT – External Audio Input’s Behavior

The external audio input can be used to feed a monaural audio signal to
the amplifier for the headsets/speaker.

An external audio signal can be used for different purposes. E.g. it is
possible to check the audio signal of a VOR receiver, to attach a traffic
sensor with acoustic output, or to use the external audio input for
(monaural) music input.

As these signals have different priorities in
comparison to radio receptions, the
priority of the external audio input can be
configured.

With the

rotary knob the following options can be selected:

always on The external audio input is always on, even during

radio receptions and transmit mode. Use this setting
only for very high priority acoustic warnings, e.g.
collision warning beep tones.

auto off The external audio input is automatically deactivated

during transmit mode, or when no external audio
activity is sensed.

not RXTX The external audio input is automatically deactivated

during radio receptions or transmit mode. This
setting does not use the external audio activity
sensing, and therefore can introduce noise when no
signal source is connected.

When deactivating one PTT button and microphone for

transmissions, e.g.

in order to keep passengers from

interfering with ATC communication, don’t forget to reactiv

ate

the copilot’s PTT after end of the flight.

ACT

123.450

SBY

118.910

EXT auto off

Use this setting only when auto of

f does not react fast

enough for very short external audio signals!

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A short press of SET switches to the next configuration item, a long
press of SET exits the configuration menu.

3.6 Microphone Input Sensitivity

The microphone input sensitivity is part of the configuration menu; the
access to it is described in the beginning of section 3.

3.6.1 MLS – Standard Microphone Pilot/Left

3.6.2 MLD – Dynamic Microphone Pilot/Left

3.6.3 MRS – Standard Microphone Copilot/Right

3.6.4 MRD – Dynamic Microphone Copilot/Right

ACT

123.450

SBY

118.910

MLS 04

ACT

123.450

SBY

118.910

MRS 04

ACT

123.450

SBY

118.910

MLD 04

ACT

123.450

SBY

118.910

MRD 04

Every microphone input’s sensitivity can be individually

configured, in order to achieve equal volume with all

microphones.

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The following microphone inputs are available at the ATR833:

Microphone Input Left Right
standard (headset) MLS MRS
dynamic (glider’s gooseneck

microphone)

MLD MRD

With VOX set to 5 previously, select the microphone to adjust with

SET .

For each microphone input – if applicable: with running engine – speak

with normal volume into the selected microphone, and use the
rotary knob to adjust the sensitivity, so that the bar reaches the
middle of the scale, as depictured above.

Per microphone input a maximum of two parallel installed microphones
may be connected. (see 4.6.1).

A short press of SET switches to the next configuration item, a long
press of SET exits the configuration menu.

For correct microphone sensitivity configuration, VOX must be

set to 5 previously (for VOX-settings refer to section 0).

Don’t care for volume of the headset’s/speakers output during

this configuration, as this is set separately by INT.

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3.7 TST – Test Mode

The last option in the setup mode is the test mode. The test mode is
used by maintenance personnel only for factory-internal calibrations.

ACT

123.450

SBY

118.910

TST mode off

The test mode is activated/deactivated with

.

With active test mode, in normal operation of the radio the lower display
line contains some internal parameters, as shown below:

ACT

123.450

SBY

118.910

VOL 03 H423 V56 E22

Any press of SET exits the configuration menu

.

3.8 Master Reset

To reset all configurations back to factory settings, hold both the MEM
and ► buttons pressed while switching the radio on with I/O .

Activation of the master reset is done with DW

. After performing the

reset, the confirmation

„successfully“ is displayed, and the radio

automatically restarts.
To leave the menu without performing a master reset, press the key ► .

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4 INSTALLATION

4.1 Advices and Tips

The following suggestions should be considered before installing
The assigned installation company could perform wiring. For diagrams

refer to section 4.7 Wiring.

4.2 Telecommunication Data

The following data may be required when applying for the aircraft radio
station license:

Manufacturer: Funkwerk Avionics GmbH
Type Designation: ATR833
EASA Number: EASA.21O.0193
Transmitter Power Output: 6 W
Frequency: 118,000 – 136,975 MHz

Emission Designator:

6k00A3E for 25khz channel spacing
5k00A3E for 8,33kHz channel spacing

4.3 Scope of delivery

Part Number Description

ATR833 ATR833 – VHF communication transceiver
ZUB4 2 mounting screws and 2 hollow screws for

ATR833 – for panels up to 3 mm.

SSATR2 Connector

(Only if no cable set was ordered)

01.1404.010.71e User Manual „Operation and Installation“
EASA Form 1

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4.4 Unpacking and Inspecting the Equipment

Carefully unpack the equipment. Damages due to transportation must be
reported to the shipping company immediately. Save the shipping
container and all packing materials to substantiate your claim

4.5 Mounting

• In cooperation with a maintenance shop, location and kind of the
installation are specified. The maintenance shop can supply all
cables. Suitable sets of cables are available from Funkwerk
Avionics GmbH.

• Select a position away from heat sources. Care for adequate
convection cooling.

• Leave sufficient space for the installation of cables and connectors.

• Avoid sharp bends and wiring close to control cables.

• Leave sufficient lead length for inspection or repair of the wiring of

the connector.

• Bend the harness at the rear connectors to inhibit water droplets
(formed due to condensation) from collecting in the connector.

• Remove rotary knobs (2 pieces) before mounting:

o Lift-off faceplate with an appropriate tool
o Loosen screw and remove rotary knob
o Insert cap correctly orientated!

• The equipment is fixed front-laterally with two 6mm hollow screws
and two 4x8mm screws in a 57 mm cut-out.

• For mounting details/drawing refer to chapter 4.11.2 Mounting
Advices.

For storage or reshipment the original packaging should be

used.

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4.6 Equipment Connections

One 25 pin D-SUB miniature connector includes all electrical
connections, except for the antenna.

4.6.1 Microphone-Connection
Microphone Input Left Right

Standard (headset) MLS MRS
Dynamic (glider’s gooseneck

microphone)

MLD MRD

The inputs for standard microphones are appropriate for input voltages of
50 mVpp to 2 Vpp. These inputs have a bias voltage of 8 V at 330 ohms.
Sensitivity is adjustable in the configuration menu (see 3.6).

The inputs for dynamic microphones are appropriate for input voltages of
5 mVpp to 10 mVpp. These inputs have no bias.

In general standard microphones (headsets) MLS/MRS and dynamic
microphones (hand/gooseneck) MLD/MRD can be used simultaneously.

In motor gliders, when the engine is running, the dynamic microphones
should be turned off (switch MLD/MRD inputs to GND), in order to avoid
the transmission of the engine’s noise.

If no dynamic microphone is installed, the input sensitivity for MLD/MRD
shall be set to 1 (see 3.6).

Per input, up to two microphones can be connected in parallel.

4.6.2 Headset-Connection

Headphones may be connected parallel, as long as the total impedance
doesn’t fall below 8 Ohm.

The (+UB)-

wire has to protected by circuit breaker (4 Amp.

slow-blow)!

Unused microphone inputs should be short-circuited.

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4.6.3 Audio-Input

The external audio input can be used for the input of warn tones or music
etc. In order to avoid disturbances while this input is not used, the
respective wire needs to be short-circuited.

With cable sets available from Funkwerk Avionics the external audio­input is already short-circuited by a blind plug. This blind plug can be
easily removed in order to use the external audio input.

If the external input is not used, it needs to be short-

circuited

with GND, in order to avoid the pickup of electrical noise.

4.6.4 Remote Control Panel

In tandem-seated aircrafts it is possible to control the ATR833 by a
remote control panel (ATR600RT Remote Control Unit).

The choice of the remote control depends onto the software

version of the ATR833:
Version up to SW V6.3

are remote controlled by the

ATR600RT with 4-knob interface.
Versions starting from SW V6.4

on are remote controlled by

the ATR600RT with 2-knob interface.

If you use a ATR600RT with 4-knob-

interface, please

indicate in case of repairs and software updates tha

t no

SW version larger than V6.3 may be installed!

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4.7 Wiring

4.7.1 Conductor Cross Section

Power Supply (Power, GND): AWG18 (0.96 mm²)
Signals: AWG22 (0.38 mm²)

The conductors used must be approved for aircraft installation.

4.7.2 Connector – Pin Allocation

SSATR2

25-pin connector at
the ATR833

View from
aircraft’s side

Pin Names Functionality

1 LSP(+) LSP+ Output external Loudspeaker Positive
2 HEAD(+) HSP+ Output Headset-Speaker Positive
3 HEAD(−) HSP− Output Headset-Speaker Negative
4 EXT-NF Input external Audio-Signal
5 MIC-R-DYN MRD+ Input dynamic Microphone

(Glider/Gooseneck) Copilot/Right

6 MIC-L-GND MLS−

MLD−

Ground for Microphones Pilot/Left

7 INTERCOM ICS Intercom Activation Switch (connect to

ground for activation of intercom)

8 MIC-L-DYN MLD+ Input dynamic Microphone

(Glider/Gooseneck) Pilot/Left

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9 DATA-RX RS232 RX (for Remote Control)

10

do not connect

11 +12V-PWR +UB Input Power Supply +12V
12 +12V-PWR +UB Input Power Supply +12V
13 GND GND Ground Side of Power Supply
14 MIC-R-GND MRS−

MRD−

Ground Microphones Copilot/Right

15 PTT-L PTTL+ Push-to-Talk Pilot/Left

(connect to ground for transmitting)

16 LSP(−) LSP− Output external Loudspeaker Negative

(Not identical to ground!)

17 PTT-R PTTR+ Push-to-Talk Copilot/Right

(connect to ground for transmitting)

18 MIC-R-STD MRS+ Input standard Microphone (in headset)

Copilot/Right

19 MIC-L-STD MLS+ Input standard Microphone (in headset)

Pilot/Left

20 AUTO-ON AMON Avionic-Master-On

(in aircraft with avionic master switch:
may be connected to input power supply

+12V to override on/off key)
21 DATA-GND RS232 GND (for Remote Control)
22 DATA-TX RS232 TX (for Remote Control)
23 LCD-LIGHT LIGHT Input LCD Illumination

(in aircraft with 12V lighting bus: connect

there. In all other cases: connect to input

power supply +12V)
24 SW-12V-

OUT

Output power supply (max 200mA for

Remote Control)
25 GND GND Ground Side of Power Supply

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4.7.3 Wiring with Cable Harness BSKS833S/BSKS833D

4.7.3.1 Overview

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4.7.3.2 Connector RMT for Remote Control

This connector contains the serial interface and the power supplies for
the remote control unit. MSTR = Master Radio

Connector for the
Remote Control
in the cable harness
BSKS833S/D

View from
aircraft’s side

4.7.3.3 Connector EXT-NF for Monaural Audio Input

This connector is used for the input of monaural audio signals. He can be
used e.g. for acoustic traffic warnings, for radio navigation receiver’s
acoustic identifiers, or for input of music into the headsets.

The priority of radio reception in relation to this input can be configured
as described in section 3.5.

4.7.3.4 Auto-ON

Connector pin 20 determines the radio’s behaviour when applying power:
To activate the radio in aircraft with a dedicated avionic master switch by

this master (i.e. by applying power to the radio), connect pin 20 to the
avionic master additionally to pins 11 and 12; in this case, the radio’s
on/off-key has no functionality.

In aircraft without a dedicated avionic master, pin 20 is left open; in these
case, the radio’s on/off-key is used.

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4.8 Antenna

4.8.1 Antenna Selection

• A VHF-COM-Antenna with an impedance of 50 Ohm is required.

• Choose an antenna type approved for the aircraft and the mounting

location.

• The antenna should be located far away from ELT-antennas and
other VHF antennas.

• Specified features depend on proper installation of the antenna.

4.8.2 Installation Recommendation

• Take note of the antenna manufacturer’s instructions.

• The metallic contact between airplane surface and antenna-GND

must be very good. On non-metallic airplanes a metal foil (min. 80 cm
x 80 cm) shall be used as electrical counterweight on the inside of the
belly.

• To avoid a mutual interference of the radios, the antenna isolation
between a voice transmission and a navigation antenna as well as
between double COM antennas should be as large as possible. A
distance of 2 meters usually is sufficient.

• Assemble the antenna in vertical position so on or under the belly that
it is as far distant as possible from all protruding parts (propeller,
chassis, vertical stabilizer)

• For glider installation the internal antenna installed by the
manufacturer should be used.

• The SWR shall not exceed 3:1.

The HF antenna wire must not be included in any other

cable sets, for example power supply or microphone. It must

also not be placed t

ogether with other antenna wires, for

example NAV or Transponder.

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4.9 Microphone / Intercom settings

The settings of MIC and VOX values are essential for Intercom. The
respective configuration options are described in sections 3.6
(MIC=Microphone level) and 2.4.4 (VOX=threshold level)

If the VOX automatism is deactivated with VOX=01 intercom is activated
using the intercom switch (not PTT), which connects PIN 7 (intercom) of
the equipment connector to GND.

For operation with VOX activated PIN 7 has to be connected to GND
permanently.

Transmission merely operates when PTT is pressed.
The suppression of background noise is only possible using differential

microphones, as they are usual with modern headsets. Normal electret
microphones are not suitable.

4.10 Post-Installation Check

When installation is completed all steering and control functions of the
aircraft are to be examined, in order to exclude disturbances by the
wiring.

The SWR shall not exceed 3:1.
Furthermore a test flight is recommended, in order to guarantee the

proper in-flight operation of the radio:

• In a flight altitude of at least 2000 ft contact a ground station in a

distance of at least 50 km (30 nautical miles).

• Pay attention to unusual electrical interference.

• If possible, perform the radio test on frequencies within the upper

and lower VHF communication frequency range

A certified maintenance shop must verify proper operation of

the VHF Transceiver System.

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4.11 Drawings

4.11.1 Dimensions

4.11.2 Mounting Advices

For mounting in panel with a thickness of 3-5 mm longer screws are available (Order­No. ZUB5).

Connector Area

Panel Cut

-

out

57,5 mm

47,0 mm

2 x 6,5 mm

2 x 4,5 mm

47,0 mm

65 mm

168 mm

20 mm

Fixing clips (springs)

left / right

65

mm

18 mm

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No screws may be turned in more than max. 15mm into

the device – even if no hard limit is noticeable!

The D-Sub-

Connector (plug) has to be clamped with

both spring locks

. It is recommended to additionally

secure them with a cable tie.

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5 APPENDIX

5.1 Frequency/Channel-Plan

In the following table examples for operating and displayed frequencies
in the range between 118.000 ... 118.100 MHz are given. This table can
be continued to 136.975 MHz following the same scheme.

Operating

Frequency

(MHz)

Channel

Width

(kHz)

Displayed

Frequency in

8.33/25 kHz Mode

Displayed

Frequency in

25 kHz Mode

118.0000 25 118.000 118.000

118.0000 8.33 118.005

118.0083 8.33 118.010

118.0166 8.33 118.015

118.0250 25 118.025 118.025

118.0250 8.33 118.030

118.0333 8.33 118.035

118.0416 8.33 118.040

118.0500 25 118.050 118.050

118.0500 8.33 118.055

118.0583 8.33 118.060

118.0666 8.33 118.065

118.0750 25 118.075 118.075

118.0750 8.33 118.080

118.0833 8.33 118.085

118.0916 8.33 118.090

118.1000 25 118.100 118.100

118.1000 8.33 118.105
etc. etc. etc. etc.

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5.2 Technical Data

GENERAL

COMPLIANCE ETSO-2C37e,ED-23B Class 4, 6

ETSO-2C38e,ED-23B Class C, E

STANDARD TSO-C37d, RTCA DO-186A Class 4, 6

TSO-C38d, RTCA DO-186A Class C, E

DIMENSIONS

Height: 65 mm (2.56 in)
Width: 65 mm (2.56 in)
Length: 248 mm (9.76 in)
behind the panel (incl. connector)

WEIGHT

from P/N 833-(300)-(300) from P/N 833-(301)-(310)

1,32 lbs (0,6 kg) 1,15 lbs (0,52 kg)
MOUNTING Panel Mounted
TEMPERATURE RANGES

OPERATION
STORAGE

-20 °C ... +55 °C, 30 min at +70 °C

-55 °C . . +85 °C
MAX. HEIGHT 50000ft
VIBRATION DO-160D, Cat. S, Vibration Curve M
HUMIDITY RTCA DO-160D, Cat. A

SHOCK

6 G operation
20 G crash safety

RTCA DO-160D ENV.CAT. [C1Z]CAA[SM]XXXXXXZBAAA[YY]M[B3F3]XXA

POWER SUPPLY

13.8 VDC (11 VDC ... 18 VDC)

transmitter: 2.5A
receiver: 0.2A (Standby),max. 0.5A
audio power amplifier: up to 1A
emergency ops, reduced transmitting power

< 11 VDC
POWER CONSUMPTION Standby: 2.8W, transmitting 35W
FUSE external fuse required: 4 A, slow-blow
FREQUENCY RANGE 118.000 MHz .. 136.975 MHz
FREQUENCY STABILITY ±30 ppm at -20 °C .. + 55 °C
COMPASS-SAFE

DISTANCE

30cm
INTERCOM-INPUT

The microphone inputs are connected to the

Intercom input. 100 mVRMS at the microphone

input produce 0,5 W output power at the

Headphone output (300 Ω).

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NF (AUDIO) - INPUT 1V/600Ω

TRANSMITTER

POWER OUTPUT

6 W (nominal)

4 W (minimal)
HARMONIC DISTORTION < 10 % bei 70 % modulation
SIDETONE OUTPUT >0.5W into 300Ω (per headphone)

MICROPHONE INPUTS

2 x standard (50mV…2V) into 100Ω

2 x dynamic microphone
HARMONIC CONTENT >60dBc
MODULATIONFIDELITY deviation <6dB (350…2500Hz)
CARRIER NOISE LEVEL >35dB at 70% modulation
UNWANTED FREQUENCY-

MODULATION

<1kHz at m=70% / 1kHz

DUTY CYCLE

2 minutes on, 4 minutes off;

automatic turn-off after 2 minutes of

continuous transmit operation

RECEIVER

SENSITIVITY

-105 dBm (>6dB S+N/N,

m = 30 % /1 kHz)
BANDWIDTH / 25 KHZ -6-dB-bandwidth > ±8.0 kHz
BANDWIDTH / 8.33 KHZ -6-dB- bandwidth > ±2.78 kHz
SELECTIVITY

(channel spacing 25 KHZ)

-40-dB- bandwidth < ±17.0 kHz

-60-dB- bandwidth < ±22.0 kHz

SELECTIVITY
(channel spacing 8.33 KHZ)

-60-dB- bandwidth < ±7.37 kHz
SPEAKER-OUTPUT ≥4 W into 4 Ω (speaker output)
AGC CHARACTERISTICS

AF output deviation < 6 dB

from 10 µV to 10 mV
SQUELCH Automatic Squelch (adjustable)
SPURIOUS RESPONSES > 80 dB

DISTORTION (350…2500Hz)

<25% at rated power (85% / -33dBm)

<10% at 10dB below rated power (70%

/ -33dBm)

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

45 Document-No.: 01.1404.010.71e / Revision:

1.01

5.3 Environmental Conditions

Characteristic DO

–

160D

Section

Cat

Condition

Temperature / Altitude 4.0

C1

Low ground survival
temperature

4.5.1 – 55°C

Low operating temperature 4.5.1 – 20°C
High ground survival

Temperature

4.5.2 + 85°C

High Short-time Operating
Temperature

4.5.2 + 70°C
High Operating Temperature 4.5.3 + 55°C
In-Flight Loss of Cooling 4.5.4 Z

No auxiliary cooling
required

Altitude 4.6.1 C1 35 000 ft
Temperature Variation 5.0 C

2°C change rate minimum
per minute

Humidity 6.0 A

Shock 7.0 A

6 G operational shocks
20 G Crash Safety
Test Type R in all 6

directions
Vibration 8.0 S Vibration Curve M
Explosion Proofness 9.0 X No test required
Water Proofness 10.0 X No test required
Fluids Susceptibilities 11.0 X No test required
Sand and Dust 12.0 X No test required
Fungus Resistance 13.0 X No test required
Salt Spray 14.0 X No test required

Magnetic Effect 15.0 Z

Less than 0,3 m

Compass

Safe Distance
Power Input (DC) 16.0 B
Voltage Spike Conducted 17.0 A
Audio Frequency Conducted

Susceptibility

18.0 A

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

46Document-No.: 01.1404.010.71e / Revision: 1.01

Characteristic DO

–

160D

Section

Cat

Condition

Induced Signal Susceptibility 19.0 A
Radio Frequency

Susceptibility

20.0 YY

Emission of RF Energy 21.0 M
Lightning Induced Transient

Susceptibility

22.0

B3

F3
Lightning Direct Effects 23.0 X No test required
Icing 24.0 X No test required
Electrostatic Discharge (ESD) 25.0 A

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

47 Document-No.: 01.1404.010.71e / Revision:

1.01

Notes:

ATR833-LCD / P/N 833-(3xx)-(3xx)

Operation and Installation

48Document-No.: 01.1404.010.71e / Revision: 1.01

Notes:

Funkwerk Avionics GmbH

Heinz-Strachowitz-Str. 4

DE-86807 Buchloe

Germany

phone.: [phone]

fax.: [phone]

E-mail:

[e-mail]

www.funkwerk-avionics.com