Introduction; Hopnet Benefits; Operating Frequency; Hopnet Frequency Hopping Spread Spectrum Advantages - Murata Hn-210 Manual

Introduction

The HopNet 10 Series family of products provides reliable wireless connectivity for
either point-to-point or point-to-multipoint applications. HopNet products are built
around the WIT2410 radio transceiver, which employs frequency hopping spread
spectrum technology. This technology ensures:
• Maximum resistance to noise
• Maximum resistance to multipath fading
• Robustness in the presence of interfering signals
The HN-210 and HN-210X are NEMA 4X weatherproof versions of the HopNet
product line. The HN-214, which is an HN-210 with a 4 ft. cable, is also available.
The interface to the 210 and 210X allows the Host to communicate with the Remote
unit through an integrated 50 ft (15 meter) cable. The HN-210 and 210X can act as
either bases or remotes.
The HN-210 Remote has an internally mounted 6 dBi patch antenna. The built-in
antenna of the HN-210 case greatly eases outdoor installation since no antenna
feedline cable or adapters are needed. The 6 dBi antenna gain increases the radiated
EIRP to +24 dBm and the effective receiver sensitivity to –99 dBm. The HN-210X
has a TNC connector for attaching an external antenna and a mounting kit (part no.:
HN210X-MKIT) that accommodates both the HN-210X and any of the following
external antennas:
CORNER249
CORNER2414
OMNI249
OMNI2412

HopNet Benefits

The HopNet family of products is built with rugged enclosures compliant with IP 66
and NEMA 4X standards for outdoor and harsh industrial environments. All Hopnet
products work with each other and can be mixed and matched in a single network. All
HopNet Products are WIT2410 compatible and can be used with WIT2410 OEM
based products as well as with the SNAP2410 10Base T access point.

Operating Frequency

The HopNet family operates in the 2.4 GHz ISM band that allows for license-free use
and worldwide compliance.

HopNet Frequency Hopping Spread Spectrum Advantages

In the frequency domain, a multipath fade can be described as a frequency selective
notch that shifts in location and depth over time. Multipath fades typically occupy
five percent of the band. A conventional radio system typically has a five percent
chance of signal impairment at any given time due to multipath fading.
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