Rohde & Schwarz SMBV-P101, User Manual

Page: 41 / 131

GNSS Production Configuration and Settings
R&S
®
SMBV-P101
26 User Manual 1176.9787.02 ─ 05
Time Conversion Parameters
The basis for the time conversion is the UTC. The parameters of each of the navigation
standards are set as an offset to the UTC.
For better readability, the values of the time correction parameters are input as integer
in the same way as they are included in the satellite's navigation message. The corre-
sponding "Scale Factor" and the "Scaled Value" are also displayed.
Parameter Description SCPI Command
"A_0" Constant term of polynomial, A
0
[SOURce<hw>]:BB:GNPR:NAVigation:
TCONversion:<GNSS>:AZERo
on page 69
"A_1"
1 st order term of polynomial, A
1
[SOURce<hw>]:BB:GNPR:NAVigation:
TCONversion:<GNSS>:AONE
on page 69
"t_ot" UTC data reference Time of Week,
t
ot
[SOURce<hw>]:BB:GNPR:NAVigation:
TCONversion:<GNSS>:TOT
on page 70
"WN_t" UTC data reference Week Number,
WN
t
[SOURce<hw>]:BB:GNPR:NAVigation:
TCONversion:<GNSS>:WNOT
on page 70
Leap Second Configuration
The GPS time does not consider time corrections that are typical for the UTC, such as
the leap second for instance.
As of June 30, 2012, the value of the "Current Leap Second", is 16 seconds.
Parameter Description SCPI Command
"Synchronize" Synchronizes the leap sec-
ond according to the simula-
tion time. [:SOURce<hw>]:BB:GNPR:NAVigation:
TCONversion:LEAP:SYNC
on page 71
"Current Leap Seconds
(Ref. 1980)" Displays the currently used
leap second.
[:SOURce<hw>]:BB:GNPR:NAVigation:
TCONversion:LEAP:SEConds
on page 70
UTC-UTC(SU)
(for GLONASS satellites)
The Universal Time Coordinate (UTC) as used for GPS and Galileo can have a phase
shift and a frequency drift compared to the Russian UTC basis (UTC(SU)). These set-
tings are provided for configuration of the UTC differences UTC - UTC(SU) as transmit-
ted by GLONASS satellites.
Parameter Description SCPI Command
"UTC(SU) Refer-
ence Date" Indicates the UTC-UTC (SU) time conversion
reference date.
[:SOURce<hw>]:BB:GNPR:NAVigation:TCONversion:
UTCSu:DATE?
on page 69
"A_0" Constant term of polynomial A
0
(virtual)
[:SOURce<hw>]:BB:GNPR:NAVigation:TCONversion:
UTCSu:AZERo
on page 69
"A_1"
1
st
order term of polynomial, A
1
(virtual) [:SOURce<hw>]:BB:GNPR:NAVigation:TCONversion:
UTCSu:AONE
on page 69
Time Conversion Configuration Settings