User Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
OCTOBER 1998
PAGE 3-6 SECTION 3: INSTALLATION & ADJUSTMENTS
3.3.4 Fade Margin Calculation
The fade margin is the difference between the actual received signal and the radio’s threshold.
Using the formula provided in Section 3.3.3, the anticipated RSL can be calculated. Compare this
RSL to the specified threshold of the LYNX.sc radio, which is shown in Section 2.2, and calculate
the fade margin as the difference between the two signal levels.
Dispersive fade margin is another factor that many microwave path engineers may use to plan
their link budget. For the LYNX.sc radio, the dispersive fade margin is in excess of 55 dB and
therefore is not a determining factor in path planning. This excellent dispersive fade margin
performance is important because the spread spectrum RF signal has considerably wide
bandwidth.