User's Manual Part 1

iDEN Add-On Filter Box
User’s Manual -6-
1. Introduction
Figure 1. R-tron iDEN Add-On Filter Box
The interference within the service frequency bands is a target to be
removed because it causes the degradation of the service quality and
shrinking of the coverage.
iDEN Add-On Filter Box is the equipment for filtering off such interference
adjacent to iDEN downlink frequencies allocated at 800MHz’s and 900MHz’s
with the following features:
 7MHz or 18MHz filtering @ 800MHz’s
 5MHz filtering @ 900MHz’s
 Band Shifting @ 800MHz’s and 900MHz’s
 Roll Offs: 65 dBc at 0.5 MHz outside pass-band
Input Port
Bandwidth &
Band Setup Table
Screw for Grounding
Filtered
Output Port
AC Power Socket & Switch
Dip Switch for Bandwidth & Band Setup