Microwave Ovens
Microwave oven outputs have been measured at levels up to +20dBm ERP. The
magnetrons built into the ovens cause transmission of narrow pulses that sweep the
2.4GHz band. The energy is normally concentrated in the upper half of the band
between 2.450 and 2.485 GHz.
2.1.7 RF Cable Sizing and Recommendations
Before making any decisions as to which cable to use, first consider several factors; the
final length of the cable, the amount of power you want the cable to tolerate, the loss
factor of the cable at your chosen frequency and the outdoor climate conditions the
cable will be exposed to. For most general installations with short runs, LMR400 will
work fine. Heliax™ is recommended for any cable runs over 100 feet. The chart below
provides the loss factor for several popular cable sizes.
Coax Cable Attenuation (dB per 100 feet)
Cable Type
2.4 GHz
4.9 GHz
5.8 GHz
LMR 400
6.7 dB
9.9 dB
10.8 dB
½ inch Heliax
3.6 dB
5.5 dB
6.0 dB
5/8 inch Heliax
2.8 dB
4.2 dB
4.7 dB
7/8 inch Heliax™
2.1 dB
3.2 dB
Not recommended
Table 2: Coax Cable Loss Table
2.1.8
2.1.9
Audio and Data Cable Recommendations
Standard telephone twisted pair wiring (Cat 3, 4 or 5) is recommended for audio
connections to the Trailblazer. The Leased Line interface and the rack mount
enclosures use RJ45 connectors for the audio connections. The POTS interface in the
outdoor enclosure uses screw terminals. For the Ethernet connection, CAT 5 cable is
recommended. CAT 5 cable is also recommended for sync cables in installations where
multiple Trailblazers are co-located.
NOTE:
On the outdoor enclosure, feed the cable through the weatherproof cord grip
before
terminating it. The cord grip is too small to accept an RJ45 connector especially
while occupied by other cables!
General Tools
•
ESD Gear
•
Desktop PC or Laptop Computer with Windows™
•
Wrench Set
•
Socket Set
•
Screwdriver Set
•
Multi Meter
•
Butt-set or Test Telephone with Bare Wire Connection
•
Wire Cutters
•
Wire Strippers
•
Vapor Wrap
•
Electrical Tape
•
Small Non-Conductive Adjustment Tool
Trailblazer Installation and User Manual
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