Interference From Other Sources; Interference To Other Systems - Vectron HW 90196 User Manual

User manual Vectron

10.7.3 Interference from other sources

Other frequency hopping systems may cause occasional packet loss which is solved through packet re-
transmission.
The same applies to CW interferers.
In case the interference pattern of a specific interferer tends to disturb specific time slots or hopping
channels, the system will avoid these channels.
Since the hopping is fast and is spread over the whole band it may stand even interference from micro-
wave ovens.
The presence of direct sequence spread spectrum systems will cause an increased noise floor and re-
duce the coverage range. However, GFSK modulation has a strong noise immunity.

10.7.4 Interference to other systems

In case the system detects other transmissions during a number of consecutive frames it will perform
bearer handover to a quieter channel.
The low duty cycle and the fast frequency hopping are helpful in reducing the amount of interference to
other systems.
© Höft & Wessel AG
Lin 02.02.2001 1.00 HW90195UserMan.doc Subject to amendment, errors excepted
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