Radiometrix Ltd

TX2M/RX2M Data Sheet

page 5

TX2M and RX2M serial interface commands

2400 baud at RS232 level. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control.

Transmit (pin 3 on DB9) and Signal Ground (pin 5 on DB9) should be connected to PGM and 0V pin.

Command

Format

Description

SINGLE nnnnn

Set value of N for single channel operation

GOCHAN xx

Serial select of channel xx (0 to 127)

LOADMX xx

Set highest permitted (serial selected) channel xx (others default to ch0)

LOADaa nnnnn

Set value of N for channel aa (channels 0 to 15)

LOADTB nnnnn

Set value of N for channel 16 (channels 17 to 127 then in sequence)

RVALUE rrrr

Enter value for R register

SETPAR

Channel selected by 3 bit parallel input (0 to 7). Disable modem

SETSER

Channel selected by most recent GOCHAN operation

SETMOD

Enable internal modem. Frequency selected by most recent GOCHAN or SINGLE

GOTEST

250Hz test tone modulated transmission

<CR>

Process entry (Carriage Return = 0D hex )

/

Clear all buffers

xx = channel number from 00 to 127

aa = two digit channel number from 00 to 15

nnnnn = synthesizer N register value, (up to 65535)

rrrr = synthesizer R register value, (up to 16383)

17322

25

050

.

433

=

=

=

kHz

MHz

f

f

N

cing

Channelspa

RF

TX

kHz

MHz

f

f

R

cing

channelspa

TCXO

25

13

=

=

, So R=520

16466

25

4

.

21

050

.

433

4

.

21

=

−

=

−

=

kHz

MHz

f

MHz

f

N

cing

Channelspa

RF

RX

Channel

Number

433MHz

band

N value for TX

N value for RX

458MHz

band

N value for TX

N value for RX

0

433.050

/LOAD00 17322

/LOAD00 16466

458.525

/LOAD00 18341

/LOAD00 17485

1

433.075

/LOAD01 17323

/LOAD01 16467

458.550

/LOAD01 18342

/LOAD01 17486

2

433.100

/LOAD02 17324

/LOAD02 16468

458.575

/LOAD02 18343

/LOAD02 17487

3

433.125

/LOAD03 17325

/LOAD03 16469

458.600

/LOAD03 18344

/LOAD03 17488

4

433.150

/LOAD04 17326

/LOAD04 16470

458.625

/LOAD04 18345

/LOAD04 17489

5

433.175

/LOAD05 17327

/LOAD05 16471

458.650

/LOAD05 18346

/LOAD05 17490

6

433.200

/LOAD06 17328

/LOAD06 16472

458.675

/LOAD06 18347

/LOAD06 17491

7

433.225

/LOAD07 17329

/LOAD07 16473

458.700

/LOAD07 18348

/LOAD07 17492

8

433.250

/LOAD08 17330

/LOAD08 16474

458.725

/LOAD08 18349

/LOAD08 17493

9

433.275

/LOAD09 17331

/LOAD09 16475

458.750

/LOAD09 18350

/LOAD09 17494

10

433.300

/LOAD10 17332

/LOAD10 16476

458.775

/LOAD10 18351

/LOAD10 17495

11

433.325

/LOAD11 17333

/LOAD11 16477

458.800

/LOAD11 18352

/LOAD11 17496

12

433.350

/LOAD12 17334

/LOAD12 16478

458.825

/LOAD12 18353

/LOAD12 17497

13

433.375

/LOAD13 17335

/LOAD13 16479

458.850

/LOAD13 18354

/LOAD13 17498

14

433.400

/LOAD14 17336

/LOAD14 16480

458.875

/LOAD14 18355

/LOAD14 17499

15

433.425

/LOAD15 17337

/LOAD15 16481

458.900

/LOAD15 18356

/LOAD15 17500

16

433.450

/LOADTB 17338

/LOADTB 16482

458.925

/LOADTB 18357

/LOADTB 17501

F max

434.775

/LOADMX 69

/LOADMX 69

459.100

/LOADMX 23

/LOADMX 23

Please observe the following ERC/REC 70-03 (April 2004) Annex 1 recommendation when using the

Non-specific Short Range Device (SRD) band for Telemetry, Telecommand, Alarms, Data in general and

other similar applications.

Frequency Band

ERP

Duty

Cycle

Channel

spacing

Notes

E (433.050 - 434.790MHz)

10mW

<10% No spacing

E1 (433.050 - 434.790MHz)

1mW <100% No spacing

E2 (434.040 - 434.790MHz)

10mW <100%

<25kHz

Audio and voice signals should be

avoided in the band 433.050MHz -

434.790MHz

Power density limited to -13dBm/10

kHz for wideband channels with a

bandwidth greater than 250 kHz