SMX1-173-5 Radiometrix, SMX1-173-5 Datasheet - Page 5

• Manufacturer Part Number: SMX1-173-5
• Description: Small Multi-channel VHF Transceiver
• Manufacturer: Radiometrix

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
respectively.
SINGLE
GOCHAN xx
LOADMX xx
LOAD aa
LOADTB
RVALUE
SETPAR
SETSER
SETMOD
<cr>
/
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)
Notes:
Radiometrix Ltd
N
1. A pause of at least 50ms must be allowed between command strings (EEPROM programming
2. /SETPAR command should be issued at the end of channel programming to put the module
f
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.
back into parallel frequency select mode
Channelspa
f
nnnnn
nnnnn
nnnnn
rrrr
RF
cing
173
Set value of N for single channel operation (value not stored in eeprom)
Serial select of channel xx (0 to 127)
Set highest permitted (serial selected) channel xx (others default to ch0)
Set value of N for channel aa (channels 0 to 15)
Set value of N for channel 16 (channels 17 to 127 then in sequence)
Enter value for R register
Channel selected by 3 bit parallel input (0 to 7). Also disables modem
Channel selected by most recent 'gochan' operation
Enable internal modem. Frequency selected by most recent 'gochan' or 'single'
Process entry
Clear all buffers
25
.
250
kHz
MHz
SMX1 serial interface commands
6930
SMX1 Data Sheet
R
f
channelspa
f
Xtal
cing
13
25
MHz
kHz
, So R=520
page 5