Present In Constellation; Power Offset; Add Power Path-Loss; Frequency Number - R&S SMW-K44 User Manual

Satellite Navigation
To enable any SV ID, set "Satellites > SV Selection Criteria > Selection Mode > Man-
ual".
Remote command:
[:SOURce<hw>]:BB:GNSS:SVID<ch>:GPS:STATe
(etc. for the other GNSS systems)

Present in Constellation

If disabled, the SV ID is excluded from the currents constellation. The SV ID is auto-
matically deactivated ("SV ID > State = Off").
In the "Satellites" dialog, SV IDs that are excluded from the constellation are displayed
in gray color and are crossed out.
To reactivate such satellite, set "Present in Constellation > On" and activate it ("State >
On")
Remote command:
[:SOURce<hw>]:BB:GNSS:SVID<ch>:GPS:PRESent
(etc. for the other GNSS systems)

Power Offset

Reduces the signal of the selected SV ID by the defined value.
This is a global power offset parameter for a satellite. It affects the power level of all
signal components of a given satellite, see
on page 61.
Power changes are applied on-the-fly.
Remote command:
[:SOURce<hw>]:BB:GNSS:SVID<ch>:GPS:POWer:OFFSet
(etc. for the other GNSS systems)

Add Power Path-Loss

In "Test Mode = Navigation", enable this parameter to account for the free space
attenuation and simulate real-world conditions.
The power of the SV ID signals is reduced automatically. The power path-loss is calcu-
lated depending on the current satellite's orbit and the distance (range) between the
satellite and the receiver's position on the Earth, see
on page 61.
To observe the effect, select the "Monitor > Display > Power View", see
"Simulation
Remote command:
[:SOURce<hw>]:BB:GNSS:SVID<ch>:GPS:POWer:PLOSs
(etc. for the other GNSS systems)

Frequency Number

For GLONASS satellites, indicates the frequency number of the subcarrier used to
modulate the GLONASS satellite.
If "Nav Msg Type = NAV", the frequency number is retrieved from the imported config-
uration file.
User Manual 1178.6379.02 ─ 01
Monitor", on page 26.
Space Vehicle Configuration
on page 263
on page 263
"About satellite's (SV) power calculation"
on page 264
"Free space path-loss power"
on page 264
Power Settings
Chapter 5.3,
65