NCR RealScan 7802 Price Verifier User Guide
06/03
497-0425530 Release E
16 of 94
Load the ESS ID as follows.
1.
Create a barcode label with the ESS ID formatted as described above.
2.
Power the RealScan 7802 unit and verify the barcode scanner is operational – look at
the underside and check the scanner is lit and rotating.
3.
Scan the ESS ID barcode you created.
4.
Scan the “Record Settings” barcode.
5.
The RealScan 7802 reboots and should now start to communicate with the network.
Setting up a Wireless RF Link
Before installing a new wireless RF data link, it is important to perform an RF site
survey to characterize the immediate environment and ensure a reliable system is
designed. The general pointers indicated here assist in the initial installation and
diagnosis of a link problem, however your first line of technical support is the
specialized help available from the manufacturer of the access point or your VAR or IS
personnel doing the installation.
1.
Unobstructed line-of-sight is best. If you can, arrange the RealScan 7802 units so
there is an unobstructed line-of-sight to the access point. Under these ideal
conditions and assuming no interference from other 2.4Ghz sources, you should get
up to 150’ distance. In a typical office or retail environment 30’-50’ is more typical.
2.
Mount the access point as high as possible in the line-of-sight. This way the signals
should travel above racks, shelving, customers, etc. The human body is 90% water
and a good RF signal absorber – this is why cell phones often don’t work well inside
buildings and around crowds of other people.
3.
Keep reflective surfaces like mirrors and polished stainless steel surfaces to a
minimum and away from the antenna’s as much as possible.
4.
If you are having trouble making a connection try moving the RealScan 7802 closer
to the access point, raising it or lowering it.
As the RealScan 7802 unit cannot easily be moved once installed, it is often more
convenient to have a portable signal strength meter or an IEEE802.11b RF NIC card
in a Windows based laptop computer during installs. The Windows NIC card driver
has a similar RSSI graph or displays the signal strength as a percentage depending
on the NIC card used.
Summary of Contents for RealScan 7802
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