GNSS Production Configuration and Settings
R&S
®
SMBV-P101
43
User Manual 1176.9787.02 ─ 05
Parameter
Description
SCPI command
Age of
Ephemeris
Page (P1)
Time interval between 2 adjacent values of
TOE. It defines hence the age of the current
Glonass Ephemeris page.
This parameter maps to the P1 parameter in
the navigation message as follows:
●
01
Age of Ephemeris = 30 min
●
10
Age of Ephemeris = 45 min
●
11
Age of Ephemeris = 60 min
Note:
Tb-Interval and TOE displays depend
on this value.
[:SOURce<hw>]:BB:GNPR:SVID<ch>:
GLONass:NMESsage:EPHemeris:AOEP
Tb-Index
Index of the Tb-time interval. Time of
Ephemeris (TOE) corresponds to this value
multiplied by 15 minutes. This value is
actually a scaled TOE value with a unit of 15
minutes.
Note:
Tb-Interval and TOE displays depend
on this value.
Condition to be always met:
●
(Tb-Index – 1)
should be an integer multiple of
(Age
of Ephemeris[min]/15)
●
Case 1:
Age of Ephemeris = 30 min
Tb-Index = 1, 3, 5... 95
●
Case 2:
Age of Ephemeris=45 min
Tb-Index = 1, 4, 7... 94
●
Case 3:
Age of Ephemeris = 60 min
Tb-Index = 1, 5, 9... 93
[:SOURce<hw>]:BB:GNPR:SVID<ch>:
GLONass:NMESsage:EPHemeris:
TINDex
Tb-Alignment
(P2)
Configures TOE to be aligned to an even or
odd scale of 15 min for "Age of Ephemeris" =
30 or 60
min.
Forced to "1", hence odd in case of Age of
Ephemeris = 45 min
Note:
All Ephemeris pages of an SVID have
the same Tb alignment (P2).
The
Tb-Interval
and
TOE
parameters
depend on this value.
[:SOURce<hw>]:BB:GNPR:SVID<ch>:
GLONass:NMESsage:EPHemeris:
TALignment
Tb-Interval
Displays the Tb-Interval in the current day
where the Ephemeris set page is valid.
Tb-Interval = [((Tb - 1 + P2) *
15 * 60) -AgeOfEphemeris / 2
Examples:
●
tb = 45, P2 = 1 and Age of Eph = 30
Tb-Interval = [11:00:00 11:30:00]
●
tb = 45, P2 = 1 and Age of Eph = 45
Tb-Interval = [10:52:30 11:37:30]
●
tb = 45, P2 = 0 and Age of Eph = 60
Tb-Interval=[10:30:00 11:30:00]
[:SOURce<hw>]:BB:GNPR:SVID<ch>:
GLONass:NMESsage:EPHemeris:
TINTerval?
Navigation Message Configuration
