User Manual
Product information and planning
9500 MPR Rel. 3.1
3DB18809AAAA Issue 1140/980
A power monitor circuit is included in the common port of the diplexer assembly to provide measurement
of transmit power. It is used to confirm transmit output power for performance monitoring purposes, and
to provide a closed-loop for power level management over the specified ODU temperature and frequency
range.
2.8.4.2 RSSI Monitoring Point
The ODU has a capped BNC female connector to access RSSI during antenna alignment.
There is a linear relationship of voltage to RSSI, as shown in the table below; an RSSI of 0.25 Vdc is
equivalent to -10 dBm RSSI, and each additional 0.25 Vdc RSSI increase thereafter corresponds to a 10
dBm decrease in RSSI.
The lower the voltage the higher RSSI and better aligned the antenna is.
Table 27. RSSI Table
2.8.4.3 Waveguide Flange Data
Table 28. lists the antenna port flange types used with the ODU300, plus their mating flange options and
fastening hardware for remote mount installations.
UDR/PDR flanges are rectangular; UBR/PDR flanges are square.
On the ODU, the two flange styles are:
– UDR. 6-hole or 8-hole (6/8 bolt holes depending on frequency range/waveguide type), flush-face
flange with threaded, blind holes.
– UBR. 4-hole flush-face flange with threaded, blind holes.
The corresponding mating flange styles are:
– PDR. 6-hole or 8-hole flange with gasket groove and clear holes.
– PBR. 4-hole flange with a gasket groove and clear holes.
All fastening hardware is metric.
Units Measurement
BNC (Vdc) 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25 2.5
RSSI (dBm) -10 -20 -30 -40 -50 -60 -70 -80 -90 -100
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