Nortel 2330 Solution Manual

Also see for Secure Router 2330: Configuration guide Quick installation guide Installation guide Quick installation guide Installation

Contents

Nortel 2330 Solution Manual Manual pdf 48 page image

48 WLAN 2300 Series Outdoor Solution with Indoor Mounted APNN47250-503 (323847-C Version 02.01)Figure 3. Surge suppressorInstallationFor best results, install the surge suppressor in close proximity to a low-resistance ground at a point where thecoaxial cable enters the building. In most cases, one 8-foot rod driven into moist soil or multiple rods bondedtogether will provide adequate grounding. (see National Electrical Code guidelines).Install the surge suppressor in an accessible location that allows for periodic inspection and possiblereplacement of the gas cartridge. Provide drip loops in the cables to prevent water from entering the building,see (Figure 6 on page 50).The life expectancy of the replaceable gas tube depends on the frequency and severity of electrostatic activityat the site. Low-level conduction resulting from near-by storm activity has very little impact on the life of thecartridge, but powerful surges induced by on-site strikes will eventually result in degraded performance orfailure. Degraded performance indicators include reduced receiver sensitivity, above normal VSWR readings,and RF heating of the surge suppressor body during transmit mode. Should the discharge tube fail totally, itbecomes a permanently conductive protective shunt to ground. Periodic SWR checks provide a good indicatorof deteriorating performance, and routine replacement may be indicated following especially severe weatherevents where multiple on-site strikes were known to have happened.Warning! A properly rated surge suppressor is required for anycable/antenna combination exiting the building. The required components mustbe rated and approved for use in the intended application.