Rohde & Schwarz EVSG-B1, Руководство пользователя

Страница: 128 / 418

Numeric Measurement Modes
R&S
®
EVSG1000
128 User Manual 1178.6227.02 ─ 06
Remote command:
MEASTIME
on page 245
4.5 Non-Directional Beacon Mode (Option R&S EVSG1-
K7)
Access : [Mode] > "NDB"
Access VNC : [m] > Down arrow key
Using the LF IN connector and the R&S EVSG1-K7 option, the R&S EVSG1000 can
analyze non-directional beacon signals.
Remote command:
MODE_NDB
on page 345
● Basics on Non-Directional Beacons ......................................................................128
● NDB Measurement and Results ............................................................................128
● Configuring NDB Measurements .......................................................................... 134
4.5.1 Basics on Non-Directional Beacons
Non-directional beacons (NDBs) transmit a signal at a specific carrier frequency, but
without a specific direction. NDBs used for aviation transmit signals at frequencies
between 190
kHz and 1750 kHz, according to ICAO annex 10 (see [ 3 ]). Each beacon
is identified by a morse code, which is transmitted at either 400 Hz or 1020 Hz. Due to
the low transmission frequency, NDBs are useful particularly for middle distance navi-
gation.
4.5.2 NDB Measurement and Results
Due to the large amount of different signal parameters, the NDB measurement pro-
vides multiple views for the measurement results.
You can display graphical results directly from the NDB mode by selecting the softkey
in the "Meas" menu. In this case, the settings for the current measurement are applied
to the graphical results.
To return from the graphical results to the NDB mode, select "Return" ([F7]).
For details on the graphical results, see:
●
Chapter 5.3, "AF Spectrum Mode (Option R&S EVSG-K11)" , on page 149
●
Chapter 5.4, "AF Time Domain Mode (Option R&S EVSG-K12)" , on page 158
Non-Directional Beacon Mode (Option R&S EVSG1-K7)