tr2m-458-5 Radiometrix Ltd, tr2m-458-5 Datasheet - Page 7

• Manufacturer Part Number: tr2m-458-5
• Description: Multinarrow Band Fm Multi-channel Uhf Transceiver
• Manufacturer: Radiometrix Ltd

Notes:
Radiometrix Ltd
1. A pause of at least 50ms must be allowed between command strings (EEPROM programming time)
2. /SETPAR command should be issued at the end of channel programming to put the module back into
3. In 458MHz band, channel 12 (458.825MHz) and channel 15 (458.900MHz) are allocated
4. User can modify the frequency table of 128 channels to any desired frequency by changing N, R
5. All other frequency, power, analogue input gain and automatic noise squelching adjustment will be
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.
parallel frequency select mode
specifically for fixed alarm and radio keys/vehicle paging applications respectively and should not
be used for general purpose applications.
values of synthesizer within
Regulatory Band Allocation in the country of intended use.
treated as custom variants of the module to be set by factory.
Go to Ch69 (434.775MHz) highest channel on 433MHz band
Go to Channel 70 will wrap back to Channel 0 (433.05MHz)
Increase maximum allowed Channel to 89 (435.275MHz)
Serially select Channel 6 (433.200MHz)
Enable Parallel Channel Selection using P1:P2:P3
Go to Channel 88 (435.250MHz) outside legal 433MHz band
Go to new highest Channel 89 (435.275MHz)
Set legal highest Channel as 69 (434.775MHz) below 434.790MHz
Go to Channel Selected by P1:P2:P3
Set Synthesiser N value to 17332 to operate on 433.300MHz
Return to Parallel Frequency Selection
Change Channel 3 N value to 17338 to operate on 433.450MHz)
Serially select newly set Channel 3 frequency of 433.450MHz
Set the Ch3 back to factory set N value 17325 (433.125MHz)
Modulate with 250Hz test tone to visualise peak FM deviation
Return to Parallel Frequency Selection will not work
Module should be power-reset to exit GOTEST command
Go to last Serially Selected Channel 3 (433.125MHz)
Change Synth. R value to 1300 to get multiple of 10kHz spacing
which allows Ch0 N value to be changed to 43403 (434.030MHz)
Go to newly set Ch0 (434.030MHz) if none of P1-P3 are pulled low
Change Ch1 N to 43410 (434.100MHz) with non-uniform spacing
Select newly set Ch1 (434.100MHz) if only P1 is pulled low
Serially select newly set Channel 1 (434.100MHz)
Change R value to factory set 25kHz channel spacing
Change Channel 0 N value to factory set 17322 (433.050MHz)
Change Channel 0 N value to factory set 17323 (433.075MHz)
Go to factory set Channel 0 frequency of 433.050MHz
Go to factory set Ch0 or Ch1
Change frequency to descending order with Ch0=434.775MHz
with Ch1=434.750MHz to use at 100% duty cycle
Serially select newly set Ch1 frequency of 434.750MHz
Enable 1200 baud Modem. (Disables Parallel Channel Selection)
±
2.5MHz of factory set Channel 0 frequency subject to the Radio
TR2M Data Sheet
page 7