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FPX3 데이터시트(Datasheet) 4 Page - Radiometrix Ltd

부품명 FPX3
상세내용  High power Multichannel 869MHz band transceiver
PDF  7 Pages
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제조사  RADIOMETRIX [Radiometrix Ltd]
홈페이지  http://www.radiometrix.com
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Radiometrix Ltd
FPX3 Data Sheet (preliminary)
page 4
Serial interface commands
Serial data is sent to the unit on the programming input (PGM).
To successfully program the unit, it must be powered
Unlike earlier Radiometrix multichannel units, the FPX3 has separate N and R registers for each channel, on
transmit and on receive. In other words, the frequency of each channel is individually programmed in every
mode.
Commands include:
Commands
Function
GOCHAN a
serial select of channel a (ch0 to 7)
SETPAR
channel selected by 3 bit parallel input
SETSER
channel selected by most recent 'gochan' operation
<cr>
process entry
/
clear all buffers
#
disable command mode
Most users will not need to edit the table which relates channel frequency, channel number and synthesizer
register programming values. The commands below are used to access the eeprom table containing this
information.
Users should be warned that, in order to get the optimum switching speed from the module, the standard
channel setup uses a different reference frequency for each channel, and the absolute calculated channel
frequency is allowed to deviate by up to +/-2KHz from the nominal
LOAD aa nnnnn (aa = 0 – 7)
set value of N for channel a , for receive
LOAD aa nnnnn (aa = 8 – 15)
set value of N for channel a , for transmit
LOAD aa rrrrr (aa = 16 – 23)
set value of R for channel a , for receive
LOAD aa rrrrr (aa = 24 – 31)
set value of R for channel a , for transmit
Reference frequency (10MHz/R) must be in the range 210 to 300KHz (tx) or 175 to 300KHz (rx).
As a rule of thumb, an R value greater than 45 (tx) or 55 (rx) should be viewed with suspicion.
a = single digit channel number from 0 to 7
aa = eprom location number from 0 to 31
nnnnn = a synthesizer N register value, (up to 65535)
rrrrr = the synthesizer R register value, (up to 16383)
ALL COMMANDS MUST BE IN UPPER CASE.
Notice that the synthesizer and VCO operate at half the output frequency, so for a frequency of 869.475MHz,
the actual N/R values will be set for 434.7375MHz
Further information TBA
NOTE:
A pause of at least 50mS must be allowed between command strings (eeprom programming time)




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