ZULU Modem
Register Setting (Configuration Mode)
The internal registers enable various parameters to be controlled.
To set a register type ‘R#=x’ where # is the register number (1-6) and x is the value to set
For example, to set the channel to channel 3 type the following.
R3=3<CR>
(Where <CR> is carriage return or enter on the keyboard) The modem will then return ‘OK’ or
‘Error’ if an incorrect command is entered. Save the changes by typing
S<CR>
The modem will return with ‘SAVED’
Value Range
Example
Register
Description
0000 - FFFFFF
(24 bit address)
R1=0001
(Data sent is addressed to Zulu
MODEM with address 0001)
Sets the recipient Zulu MO-
DEM Address
R1
0000 - FFFFFF
(24 bit address)
R2=F001
(Data sent is from Zulu MODEM
with address F001)
Set own Zulu Modem
address
R2
R3
CH0 = 868.400 MHz
CH1 = 868.900 MHz
CH2 = 869.450 MHz
CH3 = 869.600 MHz
CH4 = 869.800 MHz
R3=2
Set RF channel
(Transmit on Channel 2)
0 = +1dBm
1 = +2dBm
2 = +5dBm
3 = +8dBm
4 = +11dBm
5 = +14dBm
6 = +17dBm
7 = +20dBm
Set the RF Transmit Power
output*
R4=7
R4
R5
(sets Transmit Power to max)*
0 = 9,600
1 = 19,200
2 = 28,800
3 = 56,000
R5=3
(sets the RF data rate to
56Kbps)
Set the RF baud rate*
Channel Number
Frequency
Centre (MHz)
EU Power Allowance
mW / dBm
Notes
0
1
2
3
4
868.400
868.900
869.450
869.600
869.800
25 / 14
25 / 14
100 / 20
100 / 20
25 / 14
Applicable standard - EN300-220
Notes on power and frequency
The EU standard sets maximum power transmission limits dependent on the frequency, the
bandwidth and the application. Please check the relevant standards are being met when imple-
menting your RF Application. A rough guidance applicable to the ZULU channel numbers is giv-
en below
*Note :
Reducing Tx power reduces battery consumption!
Reducing the baud rate will increase the range!
DS-ZULUM-2
RFSOLUTIONS [ RFSOLUTIONS.LTD ]
