![Rohde & Schwarz EVSG1000 User Manual Download Page 125](http://html.mh-extra.com/html/rohde-and-schwarz/evsg1000/evsg1000_user-manual_1477821125.webp)
GBAS/SCAT-I Mode (Options R&S
EVSG-K4/-K5)
R&S
®
EVSG1000
125
User Manual 1178.6227.02 ─ 04
7.1.4
Time Slot Synchronization via PPS
The GBAS/SCAT signal is synchronous to the PPS signal of the GPS system. With the
help of this synchronization, the GBAS/SCAT-I signal is assigned to eight time slots
(twice a second).
The R&S
EVSG1000 requires a valid PPS signal for the analysis of a GBAS/SCAT-I
signal and for detection of the individual time slots. If the R&S
EVSG1000 finds a valid
PPS signal at its selected trigger connector, the status line of the display indicates
"PPS Locked". Only in this case GBAS/SCAT-I signal analysis is possible.
7.2
GBAS / SCAT-I Measurement Information
The following measurement information is displayed in all GBAS / SCAT-I views.
.................................................................................................125
..........................................................................................126
Time reference status (Time Ref.)
...............................................................................126
.................................................................................... 126
RX board (RX1 | RX2)
The currently active receiver board. See
Measurement mode
The currently active measurement mode on the active receiver board; in this case:
"GBAS" (for both GBAS and SCAT-I modes). See
Chapter 4.3, "Measurement Mode"
Frame
The currently selected frame for which the results are displayed. The most recent
frame is referred to as T, previous frames are T minus 1 (T-1), T-2, to T-39.
Slot
The currently selected slot for which the results are displayed. The slots are labeled A,
B, C, D, E, F, G, H.
GBAS / SCAT-I Measurement Information