Advertisement
2 Channel Radio Interface
Page 5
Antenna
The antenna should consist of approx. 25cm of No.24 gauge solid insulated
wire. Remove approx. 1 cm of the insulation and locate in the ANT terminal
on the receiver PCB. If a remote antenna is required, the wire antenna can be
replaced with a 50 ohm coax cable connected to a remote antenna. Connect the
centre conductor to the ANT terminal and the shield to the GND terminal
located beside the ANT terminal.
Ensure the receiver or aerial is not near (>5m) any high speed logic cables. Eg,
computers, data cables, electronic telephones. Fast logic edges have harmonics
up to >1GHz. Ensure the receiver is not near a parked car/ garage. Many cars
have alarms that use super-regenerative receivers that radiate continuously and
pollute a broad band of UHF frequencies.
Ensure the antenna has plenty of free space around it. Close proximity to any
metal will reduce their effectiveness and thus range.
Picture 1: 2 Channel Radio Receiver And Interface Board
Bosch Security Systems Pty Limited
ISSUE100.DOC
Advertisement
