User's Manual

Table Of Contents
64
6.1.5 2.5 GHz Product Variant - Receive Sensitivity, Link Loss, Output Power and Threshold Vs
Modulation Mode
The equipment capability is given in
1020HTable 10. This table gives Receive Sensitivity, Link Loss
and Output Power for PTP 600 Series Bridge in all modulation modes for channel bandwidth
equal to 30 MHz. Adaptive modulation will ensure that the highest throughput that can be
achieved instantaneously will be obtained taking account of propagation and interference.
The calculation of
1021HEquation 1 needs to be performed to judge whether a particular link can be
installed. When the link has been installed, web pages provide information about the link loss
currently measured by the equipment both instantaneously and averaged. The averaged
value will require maximum seasonal fading to be added, and then the radio reliability of the
link can be computed.
Threshold
V
alue
(
dBm
)
Output
Power
(
dBm
)
Maximum
Link Loss
(
dB
)
Channel Bandwidth (MHz)
Modulation Mode
5
MHz
10
MHz
15
MHz
30
MHz
All
Bandwidths
5
MHz
10
MHz
15
MHz
30
MHz
BPSK 0.63 single -97.95 -95.25 -91.36 -88.9 +23 158.0 155.3 151.4 150.1
QPSK 0.63 single
-96.29 -93.76 -85.17 -85.4 +23 151.2 148.9 145.2 144.5
QPSK 0.87 single
-93.79 -90.38 -81.06 -82.4 +23 148.0 144.5 141.1 140.6
16QAM 0.63 single
-91.49 -88.25 -79.20 -80.1 +23 145.6 142.4 139.2 138.5
16QAM 0.63 dual
-88.69 -84.55 -76.21 -77.0 +23 143.0 138.9 136.2 135.6
16QAM 0.87 single
-86.83 -83.59 -73.28 -75.9 +23 140.5 136.5 133.3 132.6
16QAM 0.87 dual
-84.16 -80.29 -70.08 -71.8 +23 137.2 132.6 130.1 129.1
64QAM 0.75 single
-84.69 -81.37 -70.38 -73.0 +23 137.5 133.6 130.4 129.7
64QAM 0.75 dual
-81.77 -77.83 -67.01 -68.6 +23 134.3 129.4 127.0 126.1
64QAM 0.92 single
-80.36 -76.93 -68.62 -67.6 +23 135.1 131.7 128.6 130.6
64 QAM 0.92 dual
-77.33 -73.87 -65.19 -63.9 +23 132.4 127.6 125.2 124.3
256QAM 0.81 single
-77.92 -74.50 -65.50 -65.4 +23 132.3 132.4 125.5 124.6
256QAM 0.81 dual -75.28 -71.24 -62.24 -61.0 +23 129.4 128.1 122.2 120.5
Table 10 - 2.5GHz – Receive Sensitivity, Link Loss, Output Power and Threshold Vs
Modulation Mode