X8200 Datasheet, PDF (16/19 Pages) rfsolutions.ltd – Synthesised Radio Modem

Synthesised Radio Modem
X8200
X8200HP
at the distant modem will be displayed as a bar graph on the RSSI setting.
Save & Exit is used to update the menu of the distant modem. Note that the real ID of the
distant modem has to be used. The 99 access code will note allow the menu in a distant
modem to be changed. This is to prevent all the menus of radio modems within radio range
from being modified.
Setting Exit without Save to Y and pressing the Enter Key will disconnect the link
Engage Repeater Path
Data will be first set to the modem with the ID number set in MO1 it will be then repeated to
modem ID set in MO2 and so on until the last ID number set in the repeater chain.
ATA instruction can also be used from the Host to select different paths and different
destinations.
Set Repeater Path
The Engage Repeater Path is set to Y.
A repeater path is set up by using the horizontal keys to increment the Set Repeater Path
number. When it is the same as the ID number of the repeater modem press the Enter key.
The next modem in the repeater chain is set in the same way. Finally enter the ID number of
the destination Modem
The Space Bar is used to delete the entry.
The serial ATA instruction can also be used to select a data path. It is made up of the ASCII
characters for A (41), T(54), A(41). This is followed by the number of stations (two ASCII
numbers) to be used in the repeater path followed by the destination station ID numbers. (two
ASCII numbers).
If the data string was to be transmitted to modem with ID9 and it was to be repeated at modem
ID4 and then at modem ID6. The ATA Instruction would be:
A T A 3 Stations ID4 ID6
ID9
41 54 41 30 33 30 34 30 36 30 39 DATA
The maximum number of repeaters is 99
.
6 Radio Transmission
Radio Propagation
When installing a X8200 Radio Modem there are a number of factors that should be
considered as they will affect the performance of the radio link. These are:
Transmitter power output.
Sensitivity of the receiver.
Height of transmitter and receiver antenna.
Length and type of the coaxial feeder cables to the antenna. These should be low loss
DS8200-2 April ’07
©2007 RF Solutions Ltd, www.rfsolutions.co.uk
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