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User InterfaceGPS and Assisted GPS

45Operating Manual 1171.5248.12 ─ 15

Initial Carrier Phase /rad

(R&S SMx/AMU instruments only)

Sets the initial carrier phase.

Additionally, the parameter is used in case of multipath simulation.

SCPI command:

[:SOURce<hw>]:BB:GPS:SATellite<st>:ICPHase on page 96

Resulting Frequency

Indicates the currently valid values for Doppler-shifted carrier frequency.

The resulting frequency is calculated according to the following:

L1 or L2 resulting

= f

L1 or L2

+ f

Doppler

where f

=1,575420GHz and f

=1,2276MHz as set with parameter RF Band.

Note: The carrier frequency of a R&S Signal Generator that processes a waveform gen-

erated with the R&S WinIQSIM2 has to match the value displayed with the parameter

"Resulting Frequency".

While loading a waveform in the "ARB" menu, a message is displayed, that states the

frequency used during signal generation ("Resulting Frequency"). To ensure proper sig-

nal processing, set the frequency in the header of the instrument's display to this value.

For more information, see sections chapter 2.8.8, "Generating an one-satellite static

generic GPS signal with R&S WinIQSIM2", on page 24 and chapter 2.8.9, "Loading and

Processing an GPS Waveform in the ARB of R&S Signal Generator", on page 25.

SCPI command:

[:SOURce<hw>]:BB:GPS:SATellite<st>:FREQuency on page 95

Resulting C/A Chip Rate

Indicates the currently valid values for the chip rate of the C/A code. The relevant change

to the chip rate of the C/A code is carried out automatically if the doppler shift is changed.

The resulting C/A chip rate is calculated according to the following:

C/A resulting

= f

C/A

x {1 + f

Doppler

/ f

L1 or L2

where f

=1,575420GHz and f

=1,2276MHz as set with parameter

RF Band

and f

C/A

is fixed

to 1.023 MHz.

SCPI command:

[:SOURce<hw>]:BB:GPS:SATellite<st>:CACRate on page 95

Resulting P Chip Rate

(R&S SMx/AMU instruments only)

Indicates the currently valid values for the chip rate of the P-code. The relevant change

to the chip rate of the P-code is carried out automatically if the doppler shift is changed.

The resulting P-chip rate is calculated according to the following:

P-resulting

= f

x {1 + f

Doppler

/ f

L1 or L2

}

Satellite Configuration

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