Specifications

Remote-Control CommandsGPS and Assisted GPS
98Operating Manual 1171.5248.12 ─ 15
Example:
BB:GPS:SAT1:VID 4
sets id 4 for the first satellite.
[:SOURce<hw>]:BB:GPS:SPReading[:STATe] <State>
The command activates/deactivates spreading. When spreading is deactivated the pure
navigation data is modulated onto the RF carrier.
Note:This parameter is enabled only for "Generic" mode.
Parameters:
<State> 0 | 1 | OFF | ON
*RST: ON
Example:
BB:GPS:SMOD GEN
selects generic mode
BB:GPS:SPR ON
activates spreading of simulated GPS satellite signals.
[:SOURce<hw>]:BB:GPS:SVID<st>:DSHift <Dshift>
Sets the Doppler shift of the simulated signal of the selected satellite. The relevant change
to the chip rate of the C/A code is carried out automatically.
The currently valid values for Doppler-shifted carrier frequency and chip rates are queried
with commands:
● [:SOURce<hw>]:BB:GPS:SATellite<st>:CACRate on page 95
● [:SOURce<hw>]:BB:GPS:SATellite<st>:PCRate on page 96
● [:SOURce<hw>]:BB:GPS:SATellite<st>:FREQuency on page 95
Suffix:
<st>
.
1 .. 8
Parameters:
<Dshift> float
Range: -100kHz to 100kHz
Increment: 0.01Hz
*RST: 0
Example:
BB:GPS:SVID5:SAT:DSH 5 kHz
sets a Doppler shift of 5 kHz for satellite 1.
[:SOURce<hw>]:BB:GPS:SVID<st>:DURation?
(R&S SMx/AMU instruments only)
Queries the time (in hh:mm:ss format) the satellite is visible (the satellite's elevation will
be higher than 2.5/5/7.5/10°).
This value can be used to get an impression of how long the connected GPS receiver
will use this certain satellite for its position fix.
Satellites Configuration and Satellites Signal Settings