ADTRAN TRACER 4106 Plan A System Manual

Also see for TRACER 4106: Quick reference guide Quick reference guide

Section 2 Microwave Path Engineering Basics TRACER 4106/4206 System Manual20 © 2004 ADTRAN, Inc. 612804206L2-1ATable 3 lists path loss values for various path lengths for both 2.4 GHz and 5.8 GHz systems. Values notlisted in the table can be interpolated from those listed.5. RECEIVER SENSITIVITYReceiver sensitivity is a value expressed in decibels referenced to one milliwatt (dBm) that corresponds tothe minimum amount of signal power needed at the receiver to achieve a given bit error rate (BER).Receiver sensitivity is usually a negative number of decibels and smaller receiver sensitivity (higherquantity negative number) is better for a given BER. Several factors affect receiver sensitivity includingthe data bandwidth of the wireless link, and the amount of additional signal degradation introduced in thereceiver electronics.Receiver sensitivity of the TRACER 4106/4206 is dynamic as a function of desired bandwidth; receiversensitivity improves as delivered bandwidth decreases. In situations where 4xT1 connectivity is notrequired, the delivered bandwidth can be decreased to either 2xT1 or 1xT1, and the receiver sensitivity willbe improved as follows:Table 3. Path Loss for Given Path LengthsPath Length(miles)Path Loss (dB)at 2.4GHzPath Loss (dB)at 5.8 GHz1 104 1122 110 1183 114 1214 116 1245 118 12610 124 13215 128 13520 130 13825 132 14030 134 14135 135 143Table 4. Receiver Sensitivity for the TRACER 4106/4206DeliveredBandwidthReceiver Sensitivity ActiveT1 PortsTRACER 4106 TRACER 42064xT1 -93 dBm -90 dBm A – D2xT1 -96 dBm -93 dBm A, B1xT1 -98 dBm -95 dBm AShould an interferer be present nearby, three software selectable bandplans are providedfor frequency agility. Changing the TRACER 4106/4206 bandplan does not requireadditional components, or opening of the radio. See TRACER System Option > RFBandplan on page 47 for additional details.