INSTALLATION AND MAINTENANCE MANUAL
E1 FAMILY
LICENSED & SPREAD SPECTRUM RADIOS
JUNE 2001
SECTION 2: PRODUCT DESCRIPTION PAGE 3-51
Above 0 dBm RSL, the receiver may produce errors: however this level is rarely likely to be
exceeded. A link budget calculation should be made to calculate the anticipated RSL as described
in Section 3.3.3. During anomalous propagation conditions, the RSL may fade but will not increase
up more than 10 dB (except in unusual very long paths which may fade up by 15 dB).
Antenna alignment should enable the RSL to be peaked to the
level calculated in the link budget. If the RSL is peaked but is
approximately 20 dB below the calculated level, then it is likely
that the antennas are aligned on a sidelobe of the antenna's
radiated signal. In this case, the antennas should be rotated in a
wide arc until the main lobe is located. (Other possible causes of
low RSL are path obstructions, loss in connectors, adapters and
pigtail jumper cables or different antenna polarization at each end
of the link.)
Figure 3Figure 3-- 1010A: Typical Voltage vs Received Signal Level (RSL) for 1xE1, A: Typical Voltage vs Received Signal Level (RSL) for 1xE1,
2xE1, 4xE12xE1, 4xE1
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