User's Manual

CHAPTER 1: INTRODUCTION

516.80540.UM-Rev. D 1-Jun-07 Page 6 of 38

Product Description

 The content of this manual applies to all frequency ranges of the IPSeries Base Stations, unless

otherwise specified. This manual will note key differences between frequency ranges when

appropriate.

The IPSeries Base Stations are intelligent devices designed for stringent requirements of mobile data

communication systems. Intended for mounting in rack units, the base station requires very little room at

tower sites and may be connected via Serial Line Internet Protocol (SLIP) or Ethernet ports. At the

minimum, the unit requires a 13.8 VDC power supply, an RF Filter Antenna System, and a high-speed

data connection to an Internet Protocol Network Controller (IPNC) system to operate. The base station is

typically teamed up with a Power Amplifier (PA) and third-party system components such as antennae,

preamplifiers, preselectors, filters, and combiners.

Figure 1: Base Station External Illustration (Front View)

Product Functionality

The base station utilizes a high-performance DSP to modulate/demodulate 4 to 16-level Frequency-Shift

Keying (FSK) modem for 25 and 50 kHz channel spacing, a multi-layered approach to signaling reliability,

including patented multi-receiver Intelligent Diversity Reception™, dynamic scrambling, data interleaving

for burst error protection, Forward Error Correction (FEC), and Viterbi soft-decision algorithms.

The IPSeries High Speed Base Station technology includes IPMobileNet’s Diversity Reception (DR)

capability. Diversity Reception reduces the number of fades and the effects of multi-path reception. With

the use of three (3) antennae, mounted as far apart as possible on the base station tower, the Diversity

Reception System (DRS) minimizes the effects of fading. One of the antennae is likely to receive a viable

signal while the others may not. DRS minimizes fading effects by comparing the signal levels from the

three (3) antennae, and selecting the strongest signal.

 Diversity is most effective when the vehicle using an IPSeries Mobile Radio is in motion.