RF Innovations RFI-9256, Руководство по эксплуатации, Страница: 12 / 107

I N S T A L L A T I O N
©
© ©
© RF Innovations Pty Ltd, 1998 Page: 10
223889, Revision 2.2
Press ‘Esc’ (escape) twice.
Press ‘Y’ to exit
3
Menu.
This will establish a communications link. The
N
ETWORK
L
INK
,
C
ARRIER
D
ETECT
and
O
NLINE
LEDs
will be activated and the
T
RANSMIT
and
R
ECEIVE
LEDs will flash as information is passed.
RFI-9256 Location
Placement of your RFI-9256 unit is likely to have a significant impact on its performance. In general,
the rule of thumb with RFI-9256’s is that the higher the placement of the antenna the better the
communication link. In practice you should also place the transceiver away from computers, telephones,
answering machines, and other similar equipment. It is also advisable to keep units away from each other
unless you synchronise their transmissions (see (1) Special Controls Menu, page 20).
Using an External Antenna
The RFI-9256 has been designed to operate with the supplied antenna. In the case that a different
antenna is required please contact RF Innovations. The antenna should not be located within 20cm of
where people may come in contact.
Placement of antennas is critical to a solid data link. Other antennas in close proximity are a potential
source of interference; use the Radio Statistics to help identify potential problems. It is possible that slight
adjustments in antenna placement (as little as 1 meter) will solve noise problems. Antennas systems should
not be located within 20cm of where people may come in contact.
Long RS-232 cable runs should also be avoided in areas with frequent lightning activity or static
electricity build up unless they are properly isolated from the transceiver. Nearby lightning strikes or
elevated levels of static electricity may lead to voltage spikes on the line, causing failure in the transceiver’s
RS-232 interface. RF Innovations manufactures a range of external Data interface converters for
applications that require long cable runs.
WARNING: Any antennas placed outdoors must be properly grounded. Use extreme caution when installing antennas
and follow all instructions included with the antennas. The use of external antennas subjects the
transceiver to greater exposure to direct lightning strikes.
3
The Hayes
TM
commands will NOT work in Point-to-Point Mode by default.