Radiometrix Ltd

TX2M/RX2M Data Sheet

page 6

Figure 5: Serial configuration of TX2I-458-5 transmitter using HyperTerminal

433MHz Band

458MHz

Band

25kHz

433.05

434.79

459.1

461.675

Figure 6: Maximum allowed and programmable channels

Notes:

1. A pause of at least 50ms must be allowed between command strings (EEPROM programming

time) SINGLE mode does not store the N value in EEPROM. Therefore the unit is inoperative

after a power down until either another valid SINGLE command is received, or mode is changed

by a GOCHAN, SETPAR or SETSER command. SINGLE mode is intended for frequency agile

applications.

2. /SETPAR command should be issued at the end of channel programming to put the module

back into parallel frequency select mode

3. In 458MHz band, channel 12 (458.825MHz) and channel 15 (458.900MHz) are allocated

specifically for fixed alarm and radio keys/vehicle paging applications respectively and should

not be used for general purpose applications.

Set parallel frequency select mode

Go to Channel 3 (458.600MHz)

Go to Channel 13 (458.850MHz)

Go to Channel 23 (459.100MHz maximum allowed Channel)

Go to Channel 22 (459.075MHz)

TX2M will wrap around to Ch0 if >Ch23 (459.100MHz)

Increase highest channel to Ch30 (out of 458MHz band)

Go to new maximum Channel 30 (459.275MHz)

Reset the maximum Channel to regulatory band limit

Ch16 onwards changed from 458.925MHz to 459.000MHz

Go to new Ch18 frequency of 459.050MHz (not 458.975MHz)

Go to new maximum Ch23 frequency of 459.175MHz

Reset Ch16 onwards from 458.925MHz (within regulatory band)

Clear buffer and return to parallel channel selection

Clear buffer and go to last serially selected Ch23 (458.925MHz)

Return serially selected Channel to 0 (458.525MHz)

Return to channel selected by parallel pins (P1-P3) levels

Jump to 459.500MHz without storing it on EEPROM

Enable internal 1200baud modem

Enable internal 250Hz square wave modulated test transmission