Viavi 87339, Руководство по эксплуатации

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Testing
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3.2.7 SV PRN Edit Window
The SV PRN Edit Window opens when an SV line is selected in either the GPS or GAL
tables, displayed in the SV PRN Selection Function Window. The SV PRN Edit Window
allows the user to set parameters specific to the SV such as Doppler Step, Pseudo Range
Step Error, Carrier Coherence, Satellite Health and Amplitude offset.
Fig. 3-9 SV PRN Edit Window
Control Component Description
Select Drop down selections:
On - Turns SV on
Off - Turns SV off
Replace - Opens SV select window. To replace current SV,
highlight desired SV and press Apply.
Doppler Error Numeric Pad: Sets SV Doppler shift +/- 5kHz in 1 Hz
increments.
NOTE: Doppler shift for each SV is applied dynamically
throughout the simulation run time. This parameter introduces
a step change in Doppler (used for RAIM testing).
Amp. Offset
Numeric Pad: Sets SV carrier amplitude offset from nominal
+15 dB to -15 dB in .1 dB increments.
NOTE:
If PRN Signal is set to Variable - SV amplitudes are set
according to SV geometry and RF Level setting. If set to Fixed
- equal SV amplitudes are set.
Duration Numeric Pad: Sets the duration in time for which the Doppler
error will be applied to the SV signal output.
Step Error
Numeric Pad: Sets SV pseudo range error +/- 1000m in .001 m
increments or +/- 3280.839 ft in .001 ft increments.
Code/Carrier
Coherence
Numeric Pad: Sets frequency variation between SV code
carriers 2m/S range in 1mm/S increments or 6.561 ft/S range
in .001 ft/S increments.