Space Vehicle Configuration - R&S SMW-K44 User Manual

Satellite Navigation

9 Space Vehicle Configuration

About satellite's (SV) power calculation
In R&S SMW, you define the power level of the individual satellites or their signals and
the power level at the RF output is calculated automatically. All power levels are set
relative to a configurable reference level. By changing this level you boost or
decrease the signal power at the R&S SMW outputs, while maintaining the power ratio
between the satellites, their signals and, if enabled, the multi-path echoes.
Absolute SV power
The absolute SV power for a given signal P
P
SV,signal
●
P
●
P
Offset
●
P
Offset
The value reflects the differences between the signals and the frequency bands.
●
P
included if
See
●
P
selected body mask
See
Free space path-loss power
P
PathLoss
culated as follows:
P
PathLoss
●
R
R
at 90° elevation
●
R is the receiver to satellite range.
User Manual 1178.6379.02 ─ 01
= P + P + P
Ref SV,offset
is the reference power level, as set with the parameter
Ref
is the global power offset of the satellite, as set with the parameter
SV,offset
is signal-specific power offset, as set with the parameter
Signal,offset
is the free space path-loss over the satellite to receiver distance (range),
PathLoss
Add Power Path-Loss
"Free space path-loss power"
is the power gain of the antenna, calculated automatically, depending on the
AntPat
Chapter 10.6, "Antenna Configuration
is the free space path-loss over the satellite to receiver distance (range), cal-
= 20log (R /R), where:
10 0
= √(R
2 - r 2 )
0 Orbit,SV
is the reference range, equal to the range of a receiver on the ground to an SV
0
is calculated as follows:
SV,signal
+ P + P
Signal,offset PathLoss
> "On".
on page 61.
Settings",
Space Vehicle Configuration
, where:
AntPat
Ref. Power
Signal Power
on page 87.
Power
0
61