Width Of The Transmission Window; Impact Of Secondary Fields - Siemens SIMATIC RF 300 System Manual

From the diagram above, it can also be seen that operation is possible within the area
between Sa and Sg. The active operating area reduces as the distance increases, and
shrinks to a single point at distance Sg. Only static mode should thus be used in the area
between Sa and Sg.
4.1.2

Width of the transmission window

Determining the width of the transmission window
The following approximation formula can be used for practical applications:
B
Figure 4-1
B:
L:
Tracking tolerances
The width of the transmission window (B) is particularly important for the mechanical tracking
tolerance. The formula for the dwell time is valid without restriction when B is observed.
4.1.3

Impact of secondary fields

Secondary fields in the range from 0 to 20 mm always exist.
They should only be applied during planning in exceptional cases, however, since the
read/write distances are very limited. Exact details of the secondary field geometry cannot be
given, since these values depend heavily on the operating distance and the application.
RF 300
System Manual, 05/2005, (4)J31069 D0166-U001-A1-7618, --
= 0, 4 ⋅
L
Formula: Width of the transmission window
Width of the transmission window
Length of the transmission window
RF 300 system planning
4.1 Fundamentals of application planning
4-3