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
2. Wireless Network Site Survey Procedure
(NOTE: Refer to Appendix 1 for information regarding operation of the site survey laptop computer with
the RangeLAN2 PCMCIA card that is used during this procedure.)
a. Things To Have Before Beginning The Site Survey
• Current, accurate floor plans for the proposed coverage area from the hospital Facility Manager.
• Meter, Microwave Leakage Detector, Spacelabs part number 149-0002-00. (Refer to Appendix 2,
Microwave Leakage Measurements, for information on using this device).
• Model 90310 Wireless Network Interface (WNI).
• Laptop computer with Proxim RangeLAN2 program and PCMCIA card.
b. Things To Know About The Site Before Beginning The Survey
:
• Review the floor plans obtained from the hospital Facility Manager. Look for any potential
architectural problems, such as thick load-bearing walls, x-ray areas, fire walls, elevator shafts, heavy
doors, or doors with leaded glass or walls with wire mesh, or any other features that may make radio
transmission difficult. These areas will need special attention in the survey to ensure adequate coverage.
• Are there any other wireless products operating in the 2.4 - 2.485 GHz band? If so, ask who
manufactures it, and if known, who makes the radio portion of that product? The presence of other
frequency hopping radios in the area does not preclude a SMI wireless installation, but before
proceeding, consult with the hospital Biomedical Engineering and MIS departments to identify which
products are in use, and specifically, the maker of the radio portion of that product. Submit a complete list
of other wireless equipment including model, manufacturer and other information along with complete site
survey. Flag this survey for review by Monitoring Technical Support.
c. Actions Before Site Survey:
1. Obtain current, accurate floor plans for the proposed coverage area(s) from the hospital Facility
Manager. Make several "working" copies for use in planning the installation.
2. Walk through the area with hospital staff to identify the desired coverage area for the wireless network.
IMPORTANT
: Clearly mark the boundaries of the proposed coverage area on the floor plan, and have a
qualified representative of the customer site sign the resulting coverage diagram to confirm their approval
of the coverage area. Explain that any changes after the survey may affect the amount of equipment
required and render the survey (and Sales quotation) invalid. A copy of the signed floor plans must be
submitted with the TIP book for approval.
3. Perform an RF sweep of the area to identify any possible interfering frequencies. Mark locations of
known potential interference sources such as microwave ovens on the floor plan. (Remember that
interference can be generated from a floor above or below the installation floor). If microwave ovens are
in the area, perform an emission test using the “Microwave leakage detector tool”, part number 149-0002-
XX (see Appendix 2, "Microwave Leakage Measurements"). To minimize interference caused by
microwaves, do not place a WNI within 20 ft. of these areas.
Part Number 062-0983-01 Rev C page 3 - 19