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User InterfaceGPS and Assisted GPS

44Operating Manual 1171.5248.12 ─ 15

The displayed value is not updated but the elevation of each satellite is constantly moni-

tored. Decreasing the satellite's elevation below the selected elevation mask value is one

of the reasons for satellite handover. Thus, a change of the satellite constellation can

occur before the initially calculated time elapses.

The expected time of each upcoming handover is displayed in the "Real-Time

S.P.O.T." view by the parameter Get Next Handover Time.

Note: This parameter is enabled only for "Localization" mode.

SCPI command:

[:SOURce<hw>]:BB:GPS:SVID<st>:DURation on page 98

Additional Time Shift / CA-Chips/40

(R&S SMx/AMU instruments only)

Sets an additional delay of the selected satellite.

Additionally, the parameter can be used to simulate multipath conditions.

To simulate multipath, assign the same space vehicle (SV ID) to more than one config-

uration columns (simulated satellites) and select different "Additional Time Shift" (see

also chapter 2.8.2, "Generating Multipath Scenarios", on page 20).

SCPI command:

[:SOURce<hw>]:BB:GPS:SATellite<st>:ATSChips on page 94

Additional Power

(R&S SMx/AMU instruments only)

Sets the additional power of the satellite in dB.

Additionally, the parameter can be used to simulate multipath conditions.

To simulate multipath, assign the same space vehicle (SV ID) to more than one config-

uration columns (simulated satellites) and select different "Additional Power" (see also 

chapter 2.8.2, "Generating Multipath Scenarios", on page 20).

After Adjust Total Power to 0dB has been performed, the resulting level of a certain

satellite is calculated according to the following:

Resulting Level = Global Level + Satellite Power + Additional Power

SCPI command:

[:SOURce<hw>]:BB:GPS:SATellite<st>:APOWer on page 94

Additional Doppler Shift

(R&S SMx/AMU instruments only)

Enters the additional Doppler shift of the simulated signal of the satellite.

Additionally, the parameter can be used to simulate multipath conditions.

To simulate multipath, assign the same space vehicle (SV ID) to more than one config-

uration columns (simulated satellites) and select different "Additional Doppler Shift" (see

also chapter 2.8.2, "Generating Multipath Scenarios", on page 20).

SCPI command:

[:SOURce<hw>]:BB:GPS:SATellite<st>:ADSHift on page 93

Satellite Configuration

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Case K44 Spécifications Page 58