Simon Collings - RS-232 Interfacing for Receiver Control

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RS-232 Control of the AOR AR-3030

Interface Unit: None (connection is direct to a 9-pin D-Type female)

Standard Connections Used: TXD, RXD, GND, RTS, CTS

Flow Control: Hardware

Type of RS-232 Command Set: ASCII text

Data Parameters: 4800 or 9600 baud; 2 stop bits; no parity

Overview of RS-232 Interfaces

The AR3030 can operate at either 4800 or 9600 baud. To enable RS-232 operation, you must type [4],[8],[0],[0].[ENT] or [9],[6],[0],[0],[ENT] from the receiver's front panel. RS-232 operation is terminated using the Q command.

RS-232 Connector Pinout

AR3030	Function	IBM-PC
1	Frame Ground	1
2	TX data	2
3	RX data	3
4	RTS	4
5	CTS	5
7	System Ground	7

Command Set

Function

Command

Memory mode -> VFO mode

D<CR>
Go to VFO mode from memory mode

Header (D=dial)

Attenuator

n	Att
0	off
1	10dB
2	20dB

AGC

n	AGC
0	slow
1	fast

Filter

n	Filter
0	normal
1	narrow

Tone

n	Tone
0	low
1	high

Fnnnnnnnn

Receive Frequency

C or
U or
L or
A or
S or
N or
X

Mode

CW
USB
LSB
AM
S.AM
FM
FAX

<CR>

Terminator

Enter Recieve Frequency
and enter dial mode (VFO)

nnn.nnnn<CR> Frequency digits in MHz

Examples: 11.625<CR>; 1.053<CR>

Mode

C<CR>	CW
U<CR>	USB
L<CR>	LSB
A<CR>	AM
S<CR>	S.AM
N<CR>	FM
X<CR>	FAX

Attenuator

0R<CR>	off
1R<CR>	10dB
2R<CR>	20dB

AGC

0G<CR>	Slow
1G<CR>	Fast

Filter

0B<CR>	Normal
1B<CR>	Narrow

Tone

0T<CR>	Low
1T<CR>	High

Quit

Q
Return to front panel operation

Pass status in
memory mode

P0<CR>	off
P1<CR>	on

Goto memory mode after
responding with memory
data for channel nn

nnM<CR>

Responds with:

Mnn Pn Rn Gn Bn Tn Fnnnnnnnn m<CR>
The format of the command is as follows:

Mnn

Memory channel 00-99

Pass status

0	off
1	on

Attenuator status

0	Attenuator off
1	10dB
2	20dB

AGC

0	Slow
1	Fast

Filter

0	Normal
1	Narrow

Tone

0	Low
1	High

Fnnnnnnnn

Receive Frequency

Mode

C	CW
U	USB
L	LSB
A	AM
S	S.AM
N	FM
X	FAX

Write to memory

Either:

nnW<CR>
To write the present VFO contents to channel nn and
enter memory mode. nn = 00-99

or:

W<CR>
To wite the current VFO contents to next available
blank channel. If no channels available, RX responds
with M--<CR><LF>

Read S-meter

Y<CR>
The receiver responds with an s-meter sample in the range
00-3F hexadecimal (64 steps)

nn<CR>

nn = 00 (minimum) to 3F (maximum)