Keysight E8357D/67D & E8663D PSG User’s Guide 241
GPS Modulation (Option 409)
Real Time MSGPS
Generating a Real Time MSGPS Signal
This procedure uses the internal reference clock with the factory preset
settings (the C/A chip rate is 1.023 Mcps with a clock reference of 10.23 Mcps).
Set the carrier frequency and amplitude
1.
Press the
Preset
hardkey.
2.
Press the
Frequency
hardkey. Using the numeric keypad, set the signal
generator RF output carrier frequency to 1.57542 GHz.
3.
Press the
Amplitude
hardkey. Using the numeric keypad, set the signal
generator RF output amplitude to
−
135 dBm.
4.
Press
RF On/Off
to toggle the RF output on.
Select and play a multi-satellite scenario
1.
Press
Mode
>
More (1 of 2)
>
GPS > Real Time MSGPS.
2.
Press
Scenario
.
3.
Use the navigation softkeys or the up and down arrow hardkeys to
highlight the
santarosa
scenario file.
4.
Press
Select Scenario
. A summary of the scenario is displayed including
the simulated location, the date and time, and the satellites in view.
5.
Press
Number of Satellites
and enter
5
to use only the first five satellites
in view in the generated signal.
6.
Press
Real-time MSGPS Off On
to On to play the selected scenario.
7.
Press
Pause
. The scenario file stops playing.
8.
Press
Resume
. The scenario file continues playing from the point at which
it was paused.
9.
Press
Restart
. The scenario file plays from the beginning without turning
off the RF.
NOTE
Selecting a new scenario, toggling Real-time MSGPS off and on, or pressing
Restart sets the active scenario to the beginning. If Resume is active, the
scenario immediately starts playing; if Pause is active, select Resume to start
playing the scenario.
shows the signal generator display with the
santarosa
MSGPS scenario selected.
The scenario information within the box (Scenario State, Signal Play Duration,
Satellites in View) is dynamic. The scenario information outside of the box
(Location, Start Date, and so on) is static.
