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’
Register
R1
Value Range
0000 - FFFFFF
(24 bit address)
0000 - FFFFFF
(24 bit address)
CH0
CH1
CH2
CH3
CH4
0
1
2
3
4
5
6
7
0
1
2
3
= 868.400 MHz
= 868.900 MHz
= 869.450 MHz
= 869.600 MHz
= 869.800 MHz
Description
Sets the recipient Zulu MO-
DEM Address
Set own Zulu Modem
address
Example
R1=0001
(Data sent is addressed to Zulu
MODEM with address 0001)
R2=F001
(Data sent is from Zulu MODEM
with address F001)
R3=2
(Transmit on Channel 2)
R2
R3
Set RF channel
R4
= +1dBm
= +2dBm
= +5dBm
= +8dBm
= +11dBm
= +14dBm
= +17dBm
= +20dBm
= 9,600
= 19,200
= 28,800
= 56,000
Frequency
Centre (MHz)
868.400
868.900
869.450
869.600
869.800
Set the RF Transmit Power
output*
R4=7
(sets Transmit Power to max)*
R5
Set the RF baud rate*
R5=3
(sets the RF data rate to
56Kbps)
Notes
Channel Number
0
1
2
3
4
EU Power Allowance
mW / dBm
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 ]
