AOR ARD9900 Instruction Manual

FAST RADIO MODEM

ARD9900

Multi-Mode And Digital Voice Interface

Instruction Manual

AOR LTD.

Authority On Radio communications

Thank you for purchasing the AOR ARD9900 Multi-mode and Digital Voice Interface.
The ARD9900 is designed to convert your HF radio equipment to a multi-mode and digital voice

capable radio without performing any modifications to your transceiver.
Please read through this instruction manual and familiarise yourself with the operation of the

ARD9900.
We suggest you keep this instruction manual for future reference.
We believe the ARD9900 will become a powerful tool to enhance your communication capabilities.
AOR LTD.

Supplied Accessories:

The following items are provided in the box

Quantity
Speaker microphone ------------------------------------------------------------------------- --------------- 1
PC interface cable -------------------------------------------------------------------------------------------- 1
Speaker cable ---------------------------------------------------------------------------------------- --------- 1
DC power cable ----------------------------------------------------------------------------------------------- 1
Microphone connector --------------------------------------------------------------------------------------- 1
Instruction manual (this booklet) -------------------------------------------------------------------------- 1

Optional accessories:

Memory Module ME-1 (necessary for SSTV and video functions).
Interface cables for most proprietary amateur transceivers.



Features:

z

Digital voice communications using existing analogue 2 way radios with encryption capability.

The ARD9900 uses the same audio frequencies (300 Hz ~ 2500 Hz) as

microphone audio to modulate the voice signal. This allows you to use an analogue
radio as a digital voice transceiver.

z

Digital voice communications in the Single Side Band (SSB) mode.

The automatic frequency clarifier function adjusts frequency drift automatically in the
SSB mode (approximately up to +/- 125 Hz).

z

Utilises an ODF M (Multi Carrier M odulation) circuit t hat is eff ective agains t Multi- path or Se lective
Fading.

z

Automatic digital receive.

Automatic voice signal detector recognises the received signal as analogue or digital,
automatically switching to the appropriate mode.

z

Digital Slow Scan TV (SSTV). NB: Requires optional ME-1 memory module.

z

Built-in video capture f unction (NTSC

NB: Requires optional ME-1 memory module.

Compresses the signal into our original adaptive JPEG format.
Send and receive images in the Digital mode.
Built-in video output connector (NTSC

purchased). Allows viewing of the picture on an external monitor.

z

Built–in high grade Vocoder (AMBE).

Utilising high-grade digital voice compression; delivers quality digital voice communications.

z

Built-in FEC error correction.

A powerful error correction circuit delivers stable and reliable communications.

z

Data communications on the HF band.

Data communication is possible on the HF (High frequency) bands at no extra cost.
(Speed may be limited by regulations in certain jurisdictions.)

z

Small and compact unit. Easy to operate.

Simply connect the ARD9900 to the microphone jack and speaker out jack of your transceiver.

No complicated or risky radio modifications are necessary.

z

Utilises a uniquely designed high performance DSP (Digital Signal Processor) engine.

z

Battery operation possible for field use.

or

PAL depending on Country in which uni t is purchased).

or

PAL depending on the country in which the unit is

Please note that it is a m andatory requirement within terms of the UK

Amateur Radio License that the call sign of the stat ion is given at either

the beginning and end of each transmission, or at fifteen minute intervals

throughout the contact. This should be done by putting the ARD9900

back into analogue mode and making the announcement.



Precautions

To prevent fire, personal injury, or damage to the unit, please observe the following

precautions:

z

z

z

We are not responsible for any damage to the radio equipment due to improper
settings or interfacing.

We are not responsible for any loss of communications due to an unexpected change
of propagation or operating environment.

Do not attempt to adjust the unit unless instructed to do so by this manual.
Do not expose the unit to direct sunlight or place the unit close to heating appliances.
Do not place the unit in excessively dusty, humid or wet areas.



Table of Contents

Supplied and optional accessories
Controls and functions

Front Panel 5
Rear Panel 7
Top Panel 9
Internal View 9
Bottom View 10

Interfacing the ARD9900

Connection to a Radio 11
Connection to a Microphone 11
Connection to a PC 12
Connection to a Power supply 12
Connection to an External speak er 12

Level Adjustment

Microphone level 12
Radio Input level 13

Code Setting

Master Key Code Setting 14
User ID Code Setting 14
Air Key Code Setting 14
Channel Switch Setting 15

Operation

Voice Communication 16
Digital Voice Communication 16
Analogue Voice Communication 16
Force Receive 16

Data Communication

Receive 17
Transmit 17

Digital Image Communication

Receive 17
Transmit 17

Type of Communications and their respective features

Communication Selection Guidance 19
Communication Mode Setting 20
Detailed functions of communication modes 22

Control Commands

Interfacing to a PC 24
Terminal Settings 24
Command format 24
Entering the System Management Screen 25
Operator’s Command List 26
Operator’s Command Details 26
Command List for the System Manager 29
Command Details of the System Manager 29
Specification 34

Page

1
5

11

12,13

14

16

17

17

18

24



Controls and functions

Front Panel

a.
b.

Power on/off switch
TX switch

This switch performs two functions:

1. In the Digital Image Communication mode:
Set the mode switch to [10101] (digital mode).
Press this switch to capture and send an image.

Note: When the Video Through Function is activated (AVT command
is ON), pressing this switch will enable output of the video signal
connected to the Video Input to also be sent to the video output
port, so that you can monitor the transmitted video image.

through

command is OFF),

the radio equipment.

pressing this switch will automatically capture the video image and then transmit
it through the radio equipment.

Refer to: Operation -- Digital Image Communication at page 16 for details.)

(

2. Digital Voice Communication mode (non encryption or fixed scramble
code mode)
Set the mode switch to [~] (analogue mode).
Press and hold this switch to force the ARD9900 to decode digital
voice signals.

Caution: Frequency tolerance for both parties must within the range of +/- 125 Hz.
(Refer to Operation -- Digital Voice Communication “force receive” on page 16 for details).

Bus LED (two colour)

c.

Illuminated red The unit is in the transmit mode.
Blinking
red

Illuminated Green The unit is in the receive mode.
Unlit The unit is in the receive standby mode or in the

Status LED (STA LED) (orange)

d.

Lit when unsent data remains in the memory.
It is illuminated when the Video Through Function is activated in digital video
communication mode.
It is not lit when Video Through Function is deactivated by the dedicated

•b

•›

POWER

a

MMFEDOOIDARTSA

DRA

009

9

9

7

6

5

MaxMin

4

3

2

F

0

1

BUS

c d

b

SP CHANTX STA MODE

f

e

g

Press this switch again to capture and send the image
When the Video Through Function is de-activated (AVT

In the digital communic ation mode, it blinks while th e
header information is being sent ( approximatel y one
[1] second).

analogue voice receive mode.

10101

A

B

C

D

E

OVER

h

i

MIC

j



command (AVT_OFF) using the PC because the TX switch then activates a
sequential function of capturing and transmitting the data.

.

e. Speaker volume adjustment

Adjustment for the internal speaker output level (or the external speaker output level
when one is connected).

f. MODE LED (Operation Mode LED)

Indicates the current operation mode:

Illuminated green ------------------------- Digital voice mode
Illuminated red --------------------------- Analogue voice mode
Illuminated orange------------------------ Data communication mode
Not illuminated ---------------------------- Digital image communication mode

g. CHANNEL switch

Select preloaded encryption code.

(Refer to: Channel Switch Setting on page 15 for details.)

h. OVER-LED

Lit when the microphone input is overloaded (too high).
A proper microphone input level will cause the LED to flash from time to time
when speaking into the microphone at a normal level.
The microphone level can be adjusted with the microphone level controller.

(Refer to: Level Adjustment on page 12 for details.)

In addition, the OVER-LED operates in receive mode as an input level indicator:

To set the optim um lev el of audio from the transcei ver (crucial for good decoding of
digital signals) , the OVER-LED operates as an in put level indicat or in receive m ode in
the following ways:

Operation of input level indicator (transceiver squelch control fully open):

Input level indicator flashes whilst receiving Input level is too low
Input level indicator extinguished Input level is optimally set
Input level indicator is soli dl y lit Input level is too high

NB: When the squelch is closed on the transceiver t he OVER–LED will flash
continuously indicating that no signal is being fed to the ARD9900.

i. Mode switch

Selects the Digital voice mode [10101] or the Analogue voice mode [~].
When the Analogue voice mode [~] is selected, ordinary analogue voice
communications will be made.
In the receive mode however, the ARD9900 will automatically detect the
mode of the incoming signal and decode signals accordingly.
The LED indicates the respective operation mode.

j. Microphone connector

Connect the supplied microphone to this connector.
Below are the pin assignments of the connector:

1. SPEAKER OUTPUT -- Monitor output signal available at this pin.

2. BIAS ---------------------- Power source for an electret condenser type of
microphone. (5V DC through 2.2K Ohm resistor).

3. GND ---------------------- Chassis ground.

4. TX-------------------------- Taking this pin to the ground will enable the transm it mode;
the same as operating the TX switch on the front panel.

5. D/A ------------------------ Taking this pin to the ground will force the unit into the
digital voice communication mode. When this pin is left
open, the operation mode will be set by the m ode switch
on the front panel.

6. MIC PTT ----------------- PTT (Push To Talk) input.



7. MIC GND ---------------- Microphone ground signal.

8. MIC IN -------------------- Microphone signal input.

Rear Panel

k.

Communication Connector (mini DIN 8 pin)

Connector to PC (RS-232C)

Pin Number

1 TX ARD9900----->PC
2 DTR ARD9900----->PC
3 DSR ARD9900<-----PC
4 GND GND
5 RX ARD9900<-----PC
6 RTS ARD9900----->PC
7 CTS ARD9900<-----PC
8 NC No Connection
Shell FG Frame ground

l.

VIDEO - IN connector

NTSC

or

connector).
Connect a video signal source such as a video camera, VCR output, etc.

m.

VIDEO – OUT connector

NTSC

or

connector).
Connect a video m onitor t o this co nnec t or to monitor a received image or a pictur e to be

sent.

n.

RADIO Connector

The pin connections of this port conform to those used by the manufacturer Adonis and
many of the current amateur radio transceivers are catered for by ready made cable
assemblies available from AOR. Otherwise, use the supplied 8-pin connector to connect
the ARD9900 to your radio equipment.
You will need to wire a c ab l e ac cor din g to th e microphone connector spec if ic at ion s of your
radio.
Below are the pin assignments of the connector on the ARD9900:

AOR,LTD.

k

VIDEO

IN OUT

l

RADIO

m n

OUT

SP

IN

o

pq r

+-

DC IN

Signal

Signal Direction

Baud Rate 9600
Data bit 8
Start bit 1
Stop bit 1
Parity None
Synchronisation Asynchronous
Flow control Hardware

PAL depending on country of purchase, 1V p – p, 75 ohm (RCA type

PAL depending on country of purchase 1V p – p, 75 ohm (RCA type



Pin number

Signal Details

1 MIC GND Microphone ground
2 MIC OUT Microphone Output
3 PTT PTT (Push To Talk) output
4 GND PTT ground
5 NC No connection
6 NC No connection
7 GND Ground
8 NC No connection

Caution: MIC GND and GND must not be connected together in the ARD9900

connector, or RF feedback will result.

o. SP IN Connector (3.5 mm mono jack )

Connect to the radio equipment’s external speaker jack.
(Input level: 0.5 V – 5 V p-p)

p. SP OUT Connector (3.5 mm mono jack)

Connect an external speaker to this jack (the internal speaker will be disabled).

q. DC IN Connector (EIAJ Type 4)

Connect to a regulated power supply. (10.7 ~ 16.0 V DC, Centre pin – positive)
For lower voltage battery operation, set the internal jumper JP 9 for battery
operation, and then connect external batteries (see page 9 for details).

Caution: If you have changed the internal jumper for low-voltage battery operation, the

battery voltage must be within the range of 5.6 ~6.5 VDC.
(DO NOT apply 12.0V or severe damage will result, and the warranty will be void!

Note: No low battery voltage detector is built-in the ARD9900.

r. FG

Frame Ground



)

Top Panel

s.

Internal speaker

Internal View

s

v

w

x

t

u

t.

Factory setting jumper (JP 8)

Must be set between 2-3. (Do not change this setting at any time.)
u. Memory module

Optional memory module for use with Digital SSTV functions.

v. Battery operation selector (JP 3)
Place the jumper between 1 – 2 (NOR) for normal operation.

Change it between 2-3 (BATT) for battery operation.
If you have changed the internal jumper for low-voltage battery operation,
battery voltage must be within the range of 5.6 ~6.5 VDC.
DO NOT apply 12.0V or severe damage will result, and the warranty will be
void!

Note: No low battery voltage detector is built-in the ARD9900.

w. Internal speaker setting (JP 6)
Jumper setting

1 -- 2 Activates internal speaker (default).
2 -- 3 Disables internal speaker and enables output from pin #1 of the

microphone connecto r. Use this position when using the speaker of the
speaker microphone provided.

Note: The SP OUT (external speaker output) has priority regardless of the

above jumper setting.)



x. Output level setting (JP 10)

Jumper setting
1 - 2 Normal level (default) (LOW)
2 - 3 High level (HIGH)

If the microphone output level is too low to drive your radio equipment,
place the jumper in the 2-3 position.

(Refer to: Radio Input Level setting on page13 for details.)

Bottom View

y. Microphone output (Radio Input) level

(Refer to setting level adjustment on page 13 for details)

y



Interfacing the ARD9900

Connection to a Radio

Before using your ARD9900, you will first ne ed to wire the cable bet ween your radio
equipment and the ARD9900. For convenience the connector on the ARD9900 is
wired to a standard specification used by the manufacturer Adonis.

ARD9900 Radio Equipment

Radio Connector
1 MIC GND

2 MIC OUT
3 PTT (H)
4 PTT (l)
5 N.C.
6 N.C.
7 GND
8 N.C.

SHELL
SP IN Connector
Signal

GND

An 8-pin microphone connector for the ARD9900 is included to enable you to make your own

connection cable, however you will need to supply and prepare your own microphone
connector for your radio equipment. Alternatively, various ready-made cables to suit most of
the current transceivers on the market are available from AOR.

Below are the pin assignm ents of the 8-pin RADIO connector on the rear panel

of the ARD9900.

Pin number
1 MIC GND Microphone ground.
2 MIC OUT Microphone output.
3 PTT (H) PTT (Push To Talk) output.
4 PTT (L) PTT (Push To Talk) ground.
5 NC No connection.
6 NC No connection.
7 GND Ground.
8 NC No connection.

Note: MIC GND and GND must not be connected together in the ARD9900 connector,

or RF feedback will result.)

Signal Details

Connection to a Microphone

A speaker microphone is included with your ARD9900. However, if you wish to use
your own microphone with the ARD9900, you may do so by wiring your microphone to
correlate with the input socket of the ARD9900. Below are the pin assignments of the



MIC GND
MIC IN
PTT IN
PTT GND
GND
EXTERNAL SPEAKER OUT
GND

Microphone connector of the ARD9900:

Pin

Function Description

1. Speaker output Monitor output signal is present at this pin when the

2. BIAS Power source for an electret condenser type of

3. GND Chassis ground .

4. TX Tak ing this pin to the groun d will enable trans mit. (T he

5. D/A Taking this pin to ground will force the ARD9900 into

6. PTT PTT (push to talk) input.

7. MIC GND Microphone ground signal.

8. MIC IN Microphone signal input.

Connection to a PC

A PC interface cable is included with the ARD9900.
Parameter settings can be made by using terminal software such as Windows HyperTerminal.

(Refer to: Control Commands on page 24 for details.)

Connection to a Power Supply

To operate your ARD9900, use a regulated power supply.
The operating volt age must be within the r ange of 10.7 ~ 16.0 V D C (current
requirement approximately 200mA).
A DC power cable is included with the ARD9900 following the standard convention:

RED Positive ( + )
BLACK Negative ( - )

If you have chang ed the internal jumper for lo w-vo ltage battery operation, the

voltage used must be within the range of 5.6 ~ 6.5 VDC.

DO NOT apply 12.0 V with the jumper in this position or severe damage will

result, and the warranty will be void!

Note: There is no low battery voltage detector built into the ARD9900.

Connection to an External Speaker

If you wish to use an external speaker, connect it to the SP OUT jack. This will also disable the
internal speaker.

Level Adjustment

Microphone Level

The microphone level has been properly adjusted at the factory for use with the microphone
provided, therefore no further adjustment is needed for normal operation.

If you wish to use your own microphone rather than the included one, you will need to wire

your microphone connector to match the pins of the ARD9900, and then adjust the microphone
level as described in the following steps:

internal speaker Jumper is set to 2 – 3.
microphone. (5V DC through a 2.2K Ohm resistor).

same as the operation of the TX switch on the front
panel.)

the Digital voice communication mode. When this pin is
left open the operation mode will be set by the mode
switch on the front panel.



1. Connect your microphone to the Microphone connector on the ARD9900.
(Note: The microphone cable to the radio MUST be unplugged at this time.)

2. Select the mode switch (i) to the digital [10101] position.

3. Select the 0 (zero) transmitting channel [CHAN].

4. Turn ON the ARD9900 while pressing the TX switch. The status LED will blink orange
indicating the ARD9900 is now in the microphone level-adjusting mode.

5. Now speak into the microphone whilst pressing PTT button. Rotate the transmitting
channel [CHAN] control clockwise until the [OVER] LED is lit on speech peaks.

6. After you have chosen the appropriate micr ophone level, press TX switch while pressing
PTT button. The TX LED will illuminate orange and the new m icrophone level will have
been memorised.

7. Release the PTT button and select Mode switch to analogue (~) position.

8. The microphone l evel adjustment in Analogue m ode is not normally required ho wever, if
the audio signal level is weak at the distant s tation, you can carry out t he same process
from 1 to 4 abo ve e ve n t ho ugh it is for analo gue mode. Pressing TX switch whil e pres s ing
the PTT button will confirm the new setting as before.

Turn the power OFF on the ARD9900 to terminate the microphone level-adjusting mode.

Radio Input Level

Perform the following steps to obtain the correct level of input for your radio equipment:
connect the microphone to the ARD9900, and then connect the ARD9900 to your radio
equipment. Finally, Connect the ARD9900 to a power supply and turn the output level
adjustment on the bottom of the ARD9900 fully counter clockwise. Now:

1. Turn the power on to the ARD9900.

2. Turn the power on to your radio equipment.

3. Set the mode switch to [10101] (digital mode).

4. Press the [PTT] switch of the microphone to transmit from the radio equipment.

5. Adjust the microphone gain of the radio equipment until the ALC function just activates.

6. If the microphone gain is too low, readjust the output level on the bottom of the
ARD9900 (See page 8 for adjustment location).

7. If the microphone gain is st ill t oo lo w after adj ustm ent, turn off the ARD 9900, rem ove th e
top cover and set t he output level setting j umper (JP 10) to the high level positi on [2-3]
and repeat the above procedure (See page 9 for jumper position).



Code Setting

Master Key code setting

The master key code is a password to allow the authorised operator access to the system
management settings for maintenance.

algorithm is applied.

To prevent unauthoris ed tampering with the s ystem code settings and poss ible damage to the unit
from incorrect code entr y (see warning be low), the master key code MUST
code prior to operation and the new code should be noted and securely stored.

To change the Master Key code, type the [AMS] command using a terminal program on a PC.
cmd>AMA_123456789012 [CR] Å Enter the factory default code. ( _ : space key)

CMD>AMA OK (Response from PC)
CMD>AMS_

Note : The master key code consists of 12 digits of numeric code (0 ~ 9). Default code: 123456789012
(Refer to: Control commands on page 24 for details.)

Warning!

The master key code MUST be kept in a secure place. Without a master key
code no code changes can be made.

If you made an e ntry error during t he initial code set ting, correc t it under the Ma ster Ke y code entr y
screen before exiting. Once you exit from the master key code setting screen with an
incorrect/unknown code, neither you nor the factory will be able to change it!

************

[CR]

It also forms the key onto which the encryption

be changed to your own

(Enter a new master key code.)

User ID code Setting

The User ID code is a uniq ue code set by you to identif y your own ARD9900 for use with the digita l
squelch mode.

To change the ID code, first type the [AMA] command to allow entry into the
Data management Menu:

cmd>AMA_
CMD>AMA OK (Response from PC) note that the command prompt is now upper

CMD>AUI_

Note : The user ID code consists of 5 digits of numeric code (0 ~ 9)
Default : 77777
(Refer to: Control command on page 24 for details.)

************

*****

[CR]

[CR] Å Enter the master key code

case to indicate you are in the System Management screen.
(Enter a new user ID code.)

Air Key code Setting

The Air Key code is a string of encryption code information that is attached to the beginning
of the transmitted data packet.

To set the Air Key code, first type the [AMA] command to allow entry into the
Data management Menu:

Å

cmd>AMA_
CMD>AMA OK (Response from PC)

CMD>AAK_

Note : The Air Key code consists of 4 digits of numeric code (0 ~ 9)
Default : 0000
(Refer to: Control commands on page 24 for details.)

************
****

[CR]

[CR]

Enter the master key code

(Enter a new Air Key code.)



Channel Switch Setting

There are 16 different channel settings for the ARD9900. By simply rotating the channel
switch on the front panel of the ARD9900 to the desired setting, a pre-programmed
encryption mode can be easily recalled from the memory.
To set the Channel Switch setting, first type the [AMA] command to gain entry into the
data management menu.
Rotate and select the desired channel switch position (0 ~ F).
cmd> (Stand by for command)
cmd>AMA_ ************ [CR]
(Enter the master key code.)
CMD>AMA OK (Response)

CMD>AAK_

Note: The Air Key code consists of 4 digits of numeric code (0 ~ 9)
Default : 0000
(Refer to: Detailed function description on page 22 and Control Commands on page 24 for details.)

CMD>ACP [CR] (Display current channel )
CH: $ _ ID: !!!!!! _ NM: @@@@@ _ MD : &
(Setting for the current channel data)
CMD> (Standby for command)
CMD>ACP _ !!!!! _ @@@@@ _ XX ZZ (Set current channel data)
CH : 1 _ !!!!! _ NM : @@@@@ _ MD : & (Response)

Note : [$] , [!], [@] , [&], [X], [Z] - - - Parameters]

$ Channel number (Selected by the front channel switch)
_ Space (Press the space key of the PC keyboard)
!!!!! Other party’s ID (Other party’s unique ID i.e. their AUI code)
@@@@@ Netmask (Current Netmask)
F (1): Netmask valid 0: Netmask invalid
& Communication mode (Displays the communication mode on the channel)
0 : Non encryption mode
1 : Digital squelch mode

2 : Fixed encryption mode
3 : Random encryption mode

! ! ! ! ! Other party’s ID (Set other party’s unique ID i.e. their AUI code)
I D : 00000 ~ 99999
@@@@@ Netmask
(Set Netmask valid/
invalid)

Enter “1” or “0” to each digit.

1 : ID digit valid
0 : ID digit invalid

Note : On the PC screen, “1” will be displayed as “F.”

X X Setting mode 80 : Non encryption mode
00 : Fixed encryption mode
40 : Fixed airkey random encryption mode
50 : Random encryption mode
Z Z Algorithm Set communication algorithm

Note : When the communication mode is set to Non Encryption mode (80), then the algorithm must be set to
either[ 0 0 ] or [ 01] .

00 : Non encryption mode (default)
01 : Digital squelch mode

Note : When the communication mode is set to Fixe d Encry ption
mode (00) or Random Encryption mode (40, 50), then the
algorithm must be set as follows:

00 ~ 79 : Fixed Scramble Code
80 ~ 99 : Variable Scramble Code
(every 20 mS)

Note : When you execute the ACP command, it will not display detailed communications settings or algorithm

****

[CR] (Enter a new Air Key code.)

This is how the modes are displayed under the
ACP command, they cannot be entered as 1 digit
codes like this, they are entered as part of the
setting mode and algorithm setting parameters
below (XXZZ)

The net mask serves to identify how m uch of the other party’s unique
ID i.e. AUI code is n eces s ar y for communication to be ac hie ve d. If you
enter an ID of 12345 and a net m ask of 11100 only the firs t three digits
will be required to match for comm unicatio n to tak e p lace. T his m eans
you can arrange a net communication if all members AUI identifier
begins with the numbers 123.



values. If you wish to check detailed settings, use the ADS command in the system management mode.

Typical example of channel setting entry for with the ARD9900 set to channel 1:
ACP_12345_11 100_8001<CR>

When you then type ACP<CR> at the command prompt, to check this, it will return the following:
CH: 1 ID:12345 NM:FFF00 MD:1 indicating that channel 1 has been set for a remote ID of 12345

where only a match on the first three digits is required and the digital squelch is set to on. The
fact that the number 8001 was used shows that a none encryption mode has been selected and
the digital squelch is set to on.

For details of all the communication modes possible, see page 19 communication Selection

Guidance.

Operation

Note: All adjustments must be properly performed before operation.

Voice Communication

Your ARD9900 is capable of digital or analogue voice communications. In the
receive mode, the ARD 990 0 will automaticall y rec ogn i s e the type of communic ation,
and set itself to the appro priate mode. In the transm it mode, the desired operating
mode can be selected by using the front panel Mode switch.

Digital Voice Communication

Set the mode switch [10101 ~ ] upward to the digital mode position [10101].
Rotate the Channel switch on the front panel to select the desired communication
code setting.
Press and hold the PTT switch on the microphone. The STA (Status) LED will flash for
about 0ne (1) second while sending a data header signal.
When the LED stops flashing, speak into the microphone normally.

Analogue Voice Communication

Set the mode switch [10101 ~ ] downward to the analogue mode position [~] .
Press and hold the PTT switch on the microphone, and speak into the microphone
normally.

Note: The front Channel switch setting will be ignored in the Analogue Voice Communication

mode.

Force Receive

While in the Non Encryption mode (80) or Fixed code encryption mode (00) if a
Header signal is not pro perly received during comm unication, you can “force” the
ARD9900 to receive in the digital voice mode under following conditions:

z

The communication mode is in the Non Encryption mode (80) or the
Fixed Encryption mode (00).

z

The frequency difference between both parties is within +/- 125 Hz.

z

Both parties have the same communication settings.

[Procedure]

1.

Set the mode switch [10101 ~ ] downward to the analogue mode position [ ~ ].

2.

Press and hold the T X switch for about 5 ~ 10 sec onds until an audio signal is
heard from the speaker.

3.

Once an intelligible audio signal is obtained, release the TX switch.



Data Communication

Run a terminal soft ware program s uch as Windows HyperTerminal to control the
ARD9900, and enter control commands.

[Refer to: Control Commands at page 24 for details.]

Two different types of data, ASCII or binary data can be us ed. Both data types can be m ixed
as communication data.

Receive

Enter the command [ACO] to go into the converse mode. The valid received data will be
decoded and displayed on the PC screen. If received data is missing, (which may occur during
poor propagation conditions) “garbage” data may be displayed on the PC screen.

Transmit

Enter the command [ACO ] to enter the converse m ode then t ype text on th e ke yboard. When
you have finished, press the enter key.

NNNNNNNN [CR]
NNNNNNNN : ASCII character

[CR]: Carriage Return

Note: Maximum data length is 2046 bytes per packet.

To send binary data, add [FE] (hexadecimal) as a header and footer to your data.
FE BBBBBBBBBBBBBBBB FE

BBBBBBBBBBBBBBB : Binary data
FE : ID as a binary data

Note : If you need to insert the data [FE] in hexadecimal in the middle of the text, convert it into

two (2) bytes of hexadecimal data.]

FE Æ FDD8

If you need to insert the data [FD] in h exadeci m al in the m iddle of the tex t, conv ert it to

two (2) bytes of hexadecimal data.

FD Æ FDDD

Note : Maximum data length is 2046 bytes per packet.]

At the receive side, the data will be automatic al l y decoded and dis p layed on the PC screen.
If the [ALF] command is set ON, the LF (line feed) code will be added at the end of the
received data.

Digital Image Communication

Receive

When valid digital image data is recei ved, it will b e dec oded and outp ut as a v ideo im age from
the VIDEO OUT connector.

If received data is missing during a transmission, that portion will be displayed as invalid
(Like noise).

Transmit

When pin - 4 of the microphone connector is grounded, the ARD9900 starts sending an image.
When the Video Through Function is activated (AVT command is ON), pressing the TX switch



once will enable output of the video signal connected to the Video Input to be sent to the video
output port so that the video image can be checked before transmission. Pressing the TX
switch again will capture the image and then transmit it through your radio equipment. When
the Video Through Function is de-activated (AVT command is OFF), pressing the TX switch
will automatically capture the video image and then transmit it through the radio equipment. A
Progress indicator will display on the monitor during image transmission.

Types of communication and their respective features:

Encryption Method

•

The Master key and algorithm is used to create the encryption table therefore the Master
key and algorithm must be set to the same values for both the transmit and receive units.

•

The actual encryption code is selected from the encryption table by the Air Key.

In the Fixed Encryption mode

(Flag : 00), the transmit data does not contain the Air Key. To

decode the received signal then, both parties must set the air key to the same value.

Therefore
the Air Key must be obtained in advance, to select the encryption code and decode the
signals.

•

In the Random Encryption Mode 1, 2

along with transmit data.

(Flag : 40), the Air Key selected at the transmit end is sent

At the receive end, the received data will be decoded by selecting
from the encryption table using the received Air Key, therefore matching Air Keys are not
required between parties.

•

In the Random Encryption Mode 3, 4

along with transmit data. At the receive end

(Flag : 50), the random number coded Air Key is sent

, the received data will be decoded by selecting
from the encryption table using the received Air Key so again matching Air Keys are not
required.

•

Additionally, in the Random Encryption Mode 2, 4

(algorithm 80 – 99), the scramble function is
enabled and the encryption code will be changed in every 20 mSec. At the receive end, the
received data will be decoded by changing the encryption code in every 20 mSec. in
synchronisation with the ori gin al Air Key so

again matching Air Keys are not required.



With reference to the points above, c hoose the most appr opriate comm unication mode fr om the table
below:

Communication Selection Guidance

The following is a list of communication modes for the ARD9900. Choose the most suitable
communication mode for your application. The factory default setting is the non encryption
mode (Communication mode : 0).

Communication

Mode

Non Encryption

Mode

Digital Squelch

Mode

Fixed Encryption

Mode

Random

Encryption Mode

1

Random

Encryption Mode

2

Random

Encryption Mode

3

Random

Encryption Mode

4

(Note: Encrpt: Encryption. SQ: Squelch RX : Received transmission )

• When the flag value is set to [80], enter the algorithm value f or either [00] or [01] only. No other
value must be entered.

•

When the flag value is set to [0 0], enter algor ithm value b etween [00] to [79]. No other value m ust
be entered.

• The scramble function is valid only in the random encryption mode when the algorithm is set
Between flags [80 – 99]. D uring the com m unication, the e ncr yption c ode will be change d ever y 20
mSec according to the algorithm.

Mode

0 80 00 No No --- --- --­1 80 01 No Yes --- --- --­2 00 00-79 Yes No Pre-set No Fixed
3 40 00-79 Yes Yes Received

3 40 80-99 Yes No Received

3 50 00-79 Yes Yes Received

3 50 80-99 Yes Yes Received

Setting Function

Flag Algorithm

Encrpt. SQ Air Key at

RX

Air Key

Air Key

Air Key

Air Key

Air Key TX Scramble

Pre-set Fixed

Pre-set Variable

Random

number

Random

number

Fixed

Variable



Communication Mode Setting

The communication setting is set into discrete channels.

[Procedure]

1.

Using the AMA command, enter the Master Key Code to gain access to the System
Management Screen.

2.

Select the desired channel on the front panel.

3.

Using the ACP command set the desired communication mode setting.

To verify details of the setting, use the ACP command.

ACP [CR]
To verify details of the communication channel, use the ADS command.

ADS [CR]

[Example] ACP [CR]
CH: 5 ID : 12345 NM : FFFFF MD : 0

CH : 5 Channel 5 is selected
ID : 12345 Destination ID is set to 12345
NM : FFFFF Displays the nest mask setting. [ F] is indicating the digit is valid.
MD : 0 Communication mode is [ 0 ] (Non encryption mode entered as 8000).

Checking with the ADS command would reveal the following:

Flag:80 None encryption mode
Algorithm:00 Digital squelch off
AirKey:0000 Air key (previously set with AAK command)
UserID:77777 Your unique user ID set with the AUI command
CH:8 ID:12345 NM:FFFFF MD:0 Reported back information from ACP setting

This would have been entered as:

ACP_12345_11111_8000

The ARD9900 provides 16 channels (
you to avoid hearing any transmissions that are not specifically intended for you. This is
achieved by matching the remote stations AUI (or part of it) using the ID command and setting
the appropriate NETMASK. This is only applicable to those modes that have a squelch
function attributable to them; referring to the communication selection guidance table on page
19, you will see that this is applies to modes 1 and 3 only. You can assign each channel for the
remote ID of your chosen contacts, and use the NETMASK feature to set up group
communications. Depending on your desired communication scenario, you can then select the
channel number suitable. Take the following steps to perform the channel setting:

1. Decide on your own individual identification number and program this using the AUI
command. Type AUI at the System Manager command prompt, press return and the
current 5 digit setting will be displayed. To change this to your chosen number type
AUI_xxxxx (where xxxxx is your chosen 5 digit code) and press return. The AUI number
is now saved in the memory of the ARD9900. Note that only numbers not letters or any
other characters are acceptable.

2. Select the TX channel [
SQUELCH parameters (and any encryption you wish) using the front panel switch and
program the information using the ACP command.

The system works by using the ID (AUI) of the station you are attempting to communicate with,
and the NETMASK to define how much of that ID is used. If you are contacting someone with
an ID of 12345 and you use a NETMASK of 11111 this means you are requiring all five of the
digits of the other user to match before their digital squelch will be broken and communication
can take place.

A~F, 0~9

] where you want to assign the ID, NETMASK and

CHAN

) and has a digital squelch system that enables



Example

Consider setting an ID of 12345 and a NETMASK of 11100 with the digital squelch set on.
The NETMASK you have set enables contact with any remote station that contains the numbers 123
in the first part of the AUI code set on the remote ARD9900. This means that someone with an AUI
of 12345 or 12366 or 12367 etc will all hear your transmission. If you consider this carefully, this
enables you to have an exclusive net by usin g appropr i ate AUI codes withi n your gr oup. You have
16 channels that can be set with varying ID and NETMASK settings so it is possible to store many
communication scenarios.

The diagram below illustrates the types of communication possibilities using the DCS and the
ID of the remote stations you are contacting:

ID:12345 AUI:12345
NM:FFF00 MD:1
MD:1

Tx2 Rx2
ID:12345 AUI:12355
NM:FFFF0 MD:1
MD:1

Tx3 Rx3
ID:12345 AUI:12348
NM:FFFFF MD:1
MD:1

Tx4 Rx4
ID:12345 AUI:13345
NM:FFFFF MD:1
MD:0

AUI:12345
MD:0

Tx1 Rx1

Rx5



Detailed function of communication modes

[Caution: Communication mode must be set to the same for transmit and receive stations.]

Mode Non encryption mode
Features Non encryption (factory default setting). Force receiving available.

Flag 80 Setting
Algorithm 00

Functions

Encryption No
Squelch No
Air Key at RX

--­end
Air Key TX ---

Rolling Code ---

Mode Code 0
Remarks Factory default setting

Non encryption

Mode Digital Squelch mode
Features Digital Squelch is available.

Flag 80 Setting
Algorithm 01

Functions

Encryption No
Squelch No
Air Key at RX

---

end
Air Key TX ---

Rolling Code ---

Mode Code 1
Remarks Squelch will open or close by comparing the destination ID

and value of the net mask with the receiver’s user ID.

Mode Fixed Encryption mode
Features Effective against noise. Force receiving is available.

Flag 00 Setting
Algorithm 00-79

Functions

Encryption Yes
Squelch No
Air Key at RX

Use the Air Key set at the receive end
end
Air Key TX No

Rolling Code Fixed

Mode Code 2
Remarks Air Key, Flag, Algorithm must be set to the same for both

parties prior to communication

Note: A value of algorithm must be set between [00 ~ 79].



Mode Random Encryption mode 1
Features Communication can be made with the station that has Flag

40 or Flag 50. (The Master key and algorithm must be set to

the same val ue.)
Flag 40 Setting
Algorithm 00-79

Functions

Encryption Yes
Squelch Yes
Air Key at RX

Use the Air Key in the transmit data
end
Air Key TX Send the pre-set code from the transmit end

Rolling Code Fixed

Mode Code 3
Remarks Once the mode code and algorithm is set to the same at both

ends, communication can be made with the station that has

Flag 40 or Flag 50. Since the Air Key is sent from the transmit

end, It is not necessary to have the same Air Key at the

receive end.

Mode Random Encryption mode 2
Features Communication can be made with the station that has Flag 40

or Flag 50. (The Master key and algorithm must be set to the

same value.)
Flag 40 Setting
Algorithm 80-99

Functions

Encryption Yes
Squelch No
Air Key at RX

Use the Air Key in the transmit data
end
Air Key TX Send the pre-set code from the transmit end

Rolling Code Will change in every 20 mSec according to the algorithm

Mode Code 3
Remarks Once the mode code and algorithm is set to the same at both

ends, communication can be made with the station that has

Flag 40 or Flag 50. Since the Air Key is sent from the transmit

end, It is not necessary to have the same Air Key at the

receive end. The code will be scrambled and will change in

every 20 mSec.

Mode Random Encryption mode 3
Features Communication can be made with the station that has Flag 40

or Flag 50. (The Master key and algorithm must be set to the

same value.)
Flag 50 Setting
Algorithm 00-79

Functions

Encryption Yes
Squelch Yes
Air Key at RX

Use the Air Key in the transmit data
end

Air Key TX Send the random coded Air Key from the transmit end
Rolling Code Fixed

Mode Code 3
Remarks Once the mode code and algorithm is set to match,

communication can be made with the station that has Flag 40

or Flag 50 since the Air Key is sent from the transmit end. It is

not necessary to have the same Air Key at the receive end.

The code will be scrambled and will change every 20 mSec.



Mode Random Encryption Mode 4
Features Communication can be made with the station that has Flag 40 or

Flag 50 Setting
Algorithm 80-99

Function

Mode Code 3
Remarks Once the mode code and algorithm is set to the same at both ends,

Encryption Yes
Squelch Yes
Air Key at RX

end
Air Key TX Send the random coded Air Key from the transmit end

Rolling Code Will change in every 20 mSec according to the algorithm

Control Commands

Interfacing to a PC

Using the supplied PC inter face cable, co nnect the C OM connector at the rear panel (m arked
[10101] ) to the serial port of a PC.

NOTE: Be sure your PC’s serial port is active. Check for correct hardware and software settings!]

Below are the pin assignments of the COM connector of the ARD9900:

ARD9900 COM connector pin) Serial connector of a PC (D-

Terminal Settings

Communication Speed:

Data Length 8 bit
Start Bit 1
Stop Bit 1
Parity: None
Flow Control: Hardware
Local Echo None
Specifications: RS-2332C

Command Format

Run a terminal softwar e progr am such as W indows HyperTerminal, and then turn the po wer of
the ARD9900 on.
The following message should appear on the PC screen:
cmd>

This indicates the ARD9900 is ready to accept commands from the PC.

Each command consists of three (3) alphabetical characters:

Flag 50. (The Master key and algorithm must be set to the same
value.)

Use the Air Key in the transmit data

communication can be made with the station that has Flag 40 or Flag

50. Since the Air Key is sent from the transmit end It is not necessary
to have the same Air Key at the receive end. The code will be
scrambled and will change every 20 mSec.

Sub 9-pin)

Pin Pin

1 2
2 6
3 4
4 5
5 3
6 8
7 7
8 1

GND GND

9600 bps



cmd>CCC_NN [CR]
CCC: Command (Must be in upper case)

_ Space
NN: Parameter
[CR]: Carriage Return

Entering a command without a parameter will display the current parameter (value)
setting.

cmd>CCC[CR]
If an invalid parameter or command is entered, the ARD9900 will respond as follows:
cmd>

?
cmd>

Entering the System Management Screen

Using the AMA comm and with the master key code, you can enter the System Managem ent
Screen. To let you know that you are in the System Manager Screen , the command prom pt
changes from lower to upper case:

cmd>AMA_
( _ : space key)
CMD> (Response from PC)

Warning !

The master key code MU ST be kept in a secure plac e. Without the proper m aster key code,
no System Manager specific code changes can be made. In addition, it is the number on
which the encryption algorithms base their encryption so as the system manager, you will
need to be aware of the number to arrange communications within your communication group.

Note : The master key code consists of 12 digits of numeric code (0 ~ 9).

The factory default is 123456789012]

If you made an entry error whilst changing the Master Key
Code, correct it before pressing the return key. If you exit
from the master key code setting screen with an
incorrect/unknown code neither you nor our factory can
change it.

************

[CR] (Å Enter the master key code.)



Operator’s Command List

Command Function

AAQ
ACD Display the last received sender’s ID

ACN Display the last received net mask
ACO Enter the Converse mode
ACS Display the last received sender’s ID
ADC List the current commands
ADS Display current settings
AMA Entering to the System Management Screen
ATX Send digital image
AVR Display the current firmware version

Send VIDEO In signal to VIDEO OUT (to a monitor screen)

Capture image into memory of the ARD9900

Operator’s Command details

AAQ
Function Send VIDEO In signal to the VIDEO O UT (to the monitor s cr een)

Capture image into memory of the ARD9900

Default None
Format AAQ {0 / 1} [CR]
Parameter 1: Send VIDEO In si gnal to the VIDEO OUT (to the m onitor

screen)
0: Capture image into memory of the ARD9900

Details While AVT command is OFF, [AAQ 0] will be accepted.

Entering AAQ[CR] will respond with the current status.

AAQ ON --- Video signal is passed to the VIDEO OUT port
AAQ OFF --- Video signal is not passed to VIDEO OUT

Example AAQ_0 [CR]

ACD
Function Display the last received sender’s ID
Default 12356

Format ACD [CR]
Parameter None
Details Display the last received sender’s ID
Example ACD [CR]

ACN
Function Display the last received net mask

Default FFF00
Format ACN [CR]

Parameter None
Details Display the last received net mask
Example ACN [CR]



ACO
Function Enter the Converse mode

Default None
Format ACO [CR]
Parameter None
Details Change from the command mode (displaying [cmd>] on the

screen) to the converse mode.
In the converse mode, characters and/or binary data can be
sent.
To return to the comm and mode, pr ess the “C” k ey while ho lding
the “Ctrl “(control) key.

Example ACO [CR]

ACS
Function Display the last received sender’s ID
Default 12356

Format ACS [CR]
Parameter None
Details Display the last received sender’s ID
Example ACS [CR]

ADC
Function List the current commands

Default None
Format ADC [CR]

Parameter None
Details List the current commands
Example ADC [CR]

ADS
Function Display current settings
Default Headerlen: 1.00

AFC = ON
Analogue : ON
UserID : 77777
CH : X ID : 00000 NM : 00000 MD : 0
X : Currently selected channel number

Format ADS [CR]
Parameter None
Details Display current settings
Example ADS [CR]

AMA
Function Entering to the System Management Screen
Default key 123456789012

Format AMA_ {000000000000 – 999999999999} [CR]
Parameter 000000000000 - 999999999999
Details Entering the System Management Screen by using the master

key code.

Example AMA_123456789012 [CR]



ATX
Function Send digital image
Default None

Format ATX [CR]
Parameter None
Details An image must be captured and stored into memor y before it can

be sent.

Example ATX [CR]

AVR
Function Display the current firmware version
Default None

Format AVR [CR]
Parameter None
Details Displays the current firmware version
Example AVR [CR]



Command List for the System Manager

Note: 1. The following commands are available under the system management
screen only.
2 After any of the following commands have been changed, the ARD9900power must

be turned off, and then turned back on to reinitialise.

Command Function

AAK Set an Air Key code
ACP Set the transmit channel
ADC Display the current commands

ADS List the current channel settings
AFC Set AFC on/off
AHL Set the duration of the synchronous header signal
ALF Adds the LF command when the [CR] key of the PC is pressed

AMS Change the master code key
APR Reset the unit to the factory’s default setting
ARA Select to monitor digital voice and analogue voice or a nalogue

only analogue voice

ATT Set the output level of the ARD9900 to the radio
AUI Set user ID
AVT Activate/deactivate the video through function

Command details for the System Manager

AAK
Function Set an Air Key code
Default 0000

Format AAK {0000 – 9999} [CR]
Parameter {0000 – 9999}
Details Set an Air Key code
Example AAK_1111 [CR]



ACP
Function Set the transmit channel
Default CH : X ID : 00000 NM : 00000 MD : 0

X : The current selected channel

Format ACP _ {00000 – 99999} _ {each digit 1/0} _ {80/00/40/50}{00 – 99}[CR]
Parameter 00000 – 99999

Other party’s ID (numbers only, no other characters)

Number 1/ 0

Net mask setting

0 : Net mask / squelch invalid
1 : Net mask / squelch valid
(Note: the “1” will be displayed as “F” on the screen.)

80/00/40/50

Flag setting

80 : Non encryption communication mode
00 : Fixed encryption communication mode
40 : Random encryption communication mode 1 or 2
50 : Random encryption communication mode 3 or 4

Note : When the flag is set to [40], then the Random

encryption mode 1 or 2 will be selected according
to the value of algorithm.
When the flag is set to [50], then the Random
encryption mode 3 or 4 will be selected according
to the value of algorithm.

00 –99
Algorithm setting
When the flag is set to [80], the algorithm MUST
00 (Non encryption mode) or 01(Digital squelch mode.)

When the flag is set to [00], the algorithm MUST

between 00 – 79.
When the flag is set to [40] or [50], the algorithm MUST
00 – 79 (Fixed rolling code mode) or 80 – 99 (Variable rolling code
changing every 20 mSec.)

Details Each channel can store and select any desired setting. In the factory

default setting typing ACP [CR] will display the following setting
parameters:

CH : 0 ID : 00000 NM : 00000 MD : 0
: : : :
: : : Communication mode
: : : [0] Non encryption mode
: : : [1] Digital squelch mode
: : : [2] Fixed encryption mode
: : : [3] Random encryption mode
: : Net mask setting [1] valid, [0] invalid
: Other party’s ID {00000 – 99999}
Channel switch number

Note: Using the ACP command will NOT display the algorithm
value. Use the ADS command instead.

Example Channel : 8, ID : 12345, Net mask : 11100, Fixed encryption mode,

algorithm : 20

Set the channel switch to [8].
ACP_12345_11100_0020 [CR] ( _ indicates a space)

be set to

be set

be



ADC
Function Display the current commands

Default None
Format ADC [CR]

Parameter None
Details Display the current commands
Example ADC [CR]

ADS
Function List the current channel settings

Default Flag : 80

Algorithm : 00
Air Key : 0000
User ID : 77777
CH : X ID : 00000 NM : 00000 MD : 0

X : The current selected channel

Format ADS [CR]
Parameter None
Details List the current commands
Example ADS [CR]

AFC
Function Set AFC on/off
Default ON

Format AFC {ON/OFF} [CR]
Parameter ON : AFC valid

OFF: AFC invalid

Details Set the AFC (Automatic Frequency Control) function on/off.

In the SSB mode, the AFC function must be set to be valid.
In the FM mode, the AFC function may be set to be invalid

Example AFC_ON [CR]

AHL
Function Set the duration of the synchronous header signal

Default 1.00 ( 1 second)
Format AHL {050 – 198} [CR]

Parameter 050 – 198 (0.02 incremental)
Details Set the duration of the synchronous header signal.

{100} means 1.00 second of duration.

Example AHL_146 [CR] - - - Set AHL to 1.46 seconds

ALF
Function Select to add the LF code followed by the CR to the terminal
Default ON

Format ALF {ON/OFF} [CR]
Parameter ON : Add LF after CR

OFF: Does not add LF after CR

Details Select to add the LF (Line Feed) code followed by the CR (Carriage

Return) to the terminal

Example ALF_ON [CR]



AMS
Function Change the master code key
Default 123456789012

Format AMS_ {000000000000 – 999999999999} [CR]
Parameter 000000000000 - 999999999999
Details Change the master code key
Example AMS_111333444555 [CR]

Warning !

If you made an entry error whilst changing the Master Key
Code, correct it before pressing the return key. If you exit
from the master key code setting screen with an
incorrect/unknown code neither you nor our factory can
change it.

APR
Function Reset the unit to the factory’s default setting
Default None

Format APR [CR]
Parameter None
Details Reset the unit to the factory’s default setting
Example APR [CR]

ARA
Function Select to monitor digital voice/analogue voice or only analogue voice
Default ON

Format ARA_{ON/OFF} [CR]
Parameter ON : Monitor digital voice and analogue voice signal

OFF: Only analogue voice signal can be monitored
Details Select to monitor digital voice/analogue voice or only analogue voice
Example ARA_ON [CR]

ATT
Function Set the output level of the ARD9900 to the radio
Default ON

Format ATT_{ON/OFF} [CR]
Parameter ON : Select low level signal output to the radio

OFF: Select high level signal output to the radio
Details Set the output level of the ARD9900 to the radio
Example ATT_OFF [CR] - - - Select high level output



AUI
Function Set user ID
Default 77777

Format AUI_{00000 – 99999} [CR]
Parameter 00000 – 99999
Details Set user ID. The user ID is used in the digital squelch mode
Example AUI_12345 [CR]

AVT
Function Activate/deactivate the video through function
Default ON

Format AVT_{ON/OFF}[CR]
Parameter ON: Activate the video through function

OFF: Deactivate the video through function

Details When the AVT is set to ON, pressing the T X switch will displa y the “live”

image on the scr een. Press ing the TX switch again will cap ture the im age
and send it from the ARD9900.
When the AVT function is set to OFF, pressing the TX switch will
automatically capture the image

Example AVT_ON [CR]

and

send it from the ARD9900.



Specifications

Modulation
Method

Frequency Offset +/- 125 Hz AFC
Error Correction Data: Reed Solomon + Vitabi Decoder

Header 1 second, 3 tone + BPSK training pattern for synchronisation
Digital Audio AMBE ® 2020 Coder/Decoder
Mode Selection Receive: ---------------------

Video
Compression
Video
Input/output
Power
Requirement
Communication RS-232C Asynchronous, 9600 bps (setting / data)

I/O Connectors Microphone: 8 – pin metal

Dimensions 100 (w) x 32 (h) x 156 (d) (mm)

OFDM Band Width: 300 Hz ~ 2.5 KHz, 36 carrier
Symbol Rate 20 mS (50 Baud)
Guard Interval 4 mS
Tone Space 62.5 Hz
Individual Tone

Modulation
Method

Voice: Golay + Hamming

Transmit: -------------------­Digital voice mode: -------

Digital Image mode:------­Analogue voice mode:---­AOR original JPEG format

NTSC or PAL depending on country in which unit is purchased. (1Vp-p 75ohm).

10.7 ~ 16 V DC (Approximately 200 ma @ 12 V DC)

6.0 V DC with battery operation ( 5.6 ~ 6.5 V DC)

115.2 kbps (image)

Radio: 8 – pin metal
PC interface: Mini 8 – pin DIN
Video In/Out: RCA
Speaker In/Out: 3.5 mm mono jack
Power: EIAJ type 4

4 (w) x 1.3 (h) x 6.2 (d) (inches) Projections not included
Weight: Approximately 600 g (1 lb. – 5 oz)

36 carrier: DQPSK(3.6K)

Automatic selection.
Data communication mode: Automatic exchange

according to TX request from PC.
Manually selected by the mode switch Manually
selected by pressing the TX switch
Manually selected by the mode switch.



AOR, LTD.

2-6-4, Misuji, Taito-Ku

Tokyo 111-0055, Japan

Phone: [phone]

Fax: [phone]

http://www.aorja.com

e-mail:

[e-mail]

Copyright © 2003

All rights reserved