User's Manual
Table Of Contents
- Volume III
- e. Technical Description Of Operation
- Fixed channel Mode
- Auto-select Channel Mode
- g. OEM radio card
- All three cards have a transmitting frequency range of 2.4 GHz to 2.4835 GHz with a transmitting power measured at the antenna of 100 milliwatts. The radio functions as a "frequency hopper" and by definition will "hop" between a preset range of frequenci
- h. Understanding Signal Interference
- Physical Obstructions and Communication Range
- RF Interference
- i. Coverage Area
- j. Possible Monitor & WNI Configurations
- k. Communication Limitations of the Wireless Network
- m. Installation Hardware
i. Coverage Area
Domains
NOTE: Information about Domains is only supplied for information and to better understand existing
wireless networks which may already be installed in the hospital. Wireless networks sold to date
(01/18/00) do not have capability to alter Domains in both the WNI and bedside monitors.
For communication on the wireless network to function, all nodes must be set to the same Domain. The
default domain for Spacelabs Medical is 1 (one). Keep this in mind if installing wireless in a hospital that
already uses Proxim wireless for other networks, as you may need to change the hospitals domain to a
number other than one.
As of this date (01/18/00), only the Ultraview 1030/1050 wireless has the ability to change Domain.
However, since the Domain number of the WNI cannot be altered, all Ultraview 1030/1050 wireless
monitors must remain set to Domain 1.
Cells
A cell consists of a master and at least one slave synchronized to that master. In a physical sense, a cell
may be defined as the boundary within which adequate communication from the master to the slave is
assured. Cell boundaries are defined as test data throughput rates of greater than 40,000 Bytes per
second. This throughput is measured during the pre-installation site survey (See Wireless Site Survey
Procedure).
WNI’s set to the same channel may never be in the same cell (see following two figures), though the
fringes of the two or more WNI’s cells may overlap. A WNI on a different channel, and its slaves, may be
in the physical area defined as another WNI’s cell, and the two systems will not interfere.
Part Number 062-0983-01 Rev C page 3 - 10