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ARD-2 -

Go-anywhere ACARS / NAVTEX

acars / navtex decoder & display unit

Specification

Model .................................................... ARD-2 ACARS/NAVTEX decoder

Power Supply .................. 12V dc or 4 x AA battery cell

Current Consumption ...... Max. 280mA

Fuse ................................ 1A instantaneous

Decode Signal

ACARS ........................... Modulation MSK

Carrier 2400 Hz

Bit rate 2400 bps

Code type NRZi

Length of 1 character 7 bit+1 parity

NAVTEX .......................... CCIR Rec476-2B

Mark 1615 Hz

Space 1785 Hz

Shift 170 Hz

Bit rate 100 bps

Length of 1 character 7 bit

Display .................................................. LCD 16 character x 2 line

Control ............................. LED 4 x Mode Selection (green)

1 x DECODE (red)

Key ................................. 4 x Mode Selection

1 x Scroll UP

1 x Scroll DOWN

1 x Back Light ON/OFF

1 x Decode Restart

Audio signal

Input ............................... 3.5 mm mono jack

Input impedance 1k OHM

Input level 0.2 - 2V p-p

External speaker 3.5mm mono jack

Earphone socket: two, each on front

and rear panel

Serial Interface ..................................... Connector: D-Sub 9-P male

Baud rate: 9600 bps

Data length: 8 bit

Stop bit: 1

Parity: None

Flow control: RTS hard flow

Operating temp .................................... 0 - 45° C

Dimensions ........................................... 158L x 109W x 53H mm excl projections

Weight ................................................... 330g excl. batteries

If you think that data reception of aircraft ACARS and marine

NAVTEX is only for experienced professional commercial operators,

the ARD-2 may cause you to think again. This decoder & display

unit has been designed with both the newcomer and experienced

"go anywhere and everywhere" operators in mind.

The ARD-2 provides portable operation from internal batteries or

external 12V d.c. without the need for a computer. The built-in LCD

provides two lines of text with up to 32 characters of text per line

and a scroll back buffer of 512 characters.

Imagine sitting at an airfield with the ARD-2 in one hand and a

hand-portable receiver in the other (such as the AR8200) with

just a single connecting cable between them... its that simple.

As ACARS activity is highest during take off and landing, you

will see first-hand ‘what is happening’... ‘who & what’ is going

‘where & when’ !

The ARD-2 is just as capable at home offering reception of ACARS

and NAVTEX. NAVTEX traffic (audio signal from a short wave

receiver tuned in SSB such as the AR7030) is every bit as

interesting with search & rescue, weather warnings and other

routing traffic being regularly transmitted.

Getting started could not be easier, the ARD-2 is as simple as

connecting audio from a suitable radio receiver and switching on:

1) Connect the AOR AR5000 to the AF IN of the ARD-2 using the supplied lead.

2) Select the local ACARS VHF airband primary frequency in AM mode: 131.550 MHz in

the USA, Canada & Pacific, 131.450 MHz in Japan and 131.725 MHz in Europe.

3) Adjust the volume of the AR5000 to the 11 o'clock position.

4) Switch on the ARD-2 and away it goes, text will be decoded automatically by the

ARD-2 and displayed on the LCD two lines at a time.

NAVTEX is easy too... select NAVTEX-E, tune the AR5000 to a

NAVTEX frequency (such as 518 kHz), select SSB... and a whole

new world opens up. Changing receive data mode is easy, just

press one of the four mode keys:

[1] ACARS-1 mode (default) - airband ACARS

[2] ACARS-2 mode, raw data output, ideal for computer control - airband ACARS

[E] NAVTEX-E English language - marine NAVTEX

[J] NAVTEX-J Japanese character set for use in the coastal waters around Japan,

requires connection to an external PC which supports the Japanese character set.

A built-in speaker with volume control allows you to monitor activity

and assess what is going on, this is particularly useful for fine tuning

of NAVTEX and enables you to shut the sound off completely when

not required. A LEVEL control provides threshold adjustment to

achieve the best capture of weaker signals for improved

differentiation between noise and data.

Sockets are provided on the front and rear panels for external

speaker and earphone connection etc. A 9-pin RS232 socket is

also provided to enable connection to a computer for improved

comfort when viewing for extended periods, the RS232 connecting

lead is supplied with the ARD-2. A free PC Windows based

supporting package is available as a download from the AOR web

site, the ARD-2 will also communicate with other third-party software

packages to provide even further functionality.

✩

‘Go-anywhere’ portable ACARS / NAVTEX decoder with built-in LCD

✩

Simple to operate

✩

Operation from 4 x AA internal batteries or 12V external d.c.

✩

COM connector for RS232

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