Rover ST2 - SATELLITE SIGNAL MEASUREMENTS: MEAS

Brief description
Measurement start up
pag. 38
ST2 User’s Manual
Satellite Mode
15.0 SATELLITE SIGNAL MEASUREMENTS: MEAS
MEAS starts the measurements on the tuned transponder. By pressing repeatedly
the MEAS key, the display will show in sequence (Ref. next paragraph) all the
measurements made on the selected transponder as a numerical value and with
a graphic bar that varies its length proportionally to the represented measurement.
This bar memorizes the peak measurement value.
Tuning:
The upper part of the display shows the transponder tuning parameters. These
parameters are those of the active transponder. To change them use the SE-
LECT [10] key to highlight the fi eld to be changed and use UP [7] and DOWN
[9] keys to modify its value. The tuning parameters that may be changed are: :
Transponder number, frequency, Symbol Rate and Standard. Refer to section
“Push buttons and displays” in this section for more information.
Measurements:
The lower part of the display will show all measurements. The digital signal mea-
surements will show only if the transponder is locked. Refer to section “Useful
Suggestions” at the beginning of this User’s Manual for more details.
By pressing repeatedly the “MEAS” [6] key the following measurements will be
displayed (for analogue signals only the level measurement will show):
• Measurement level 1: displays the average power (PWR) for a digital
signal or the level measurement in case of an analogue signal (ref. par. 15.1),
• Measurement level 2: displays the Noise Margin (N. MARG.), the signal
quality (QLTY), the MER and EVM measurements with a relevant graphic
bar (ref. par. 15.2),
• Measurement level 3: displays the bBER (Pre BER) and aBER (Post
BER) measurements with relevant graphic bars (ref. par. 15.3),
• Measurement level 4: data obtained from the NIT tables: FEC,
Network name(NETW NAME),bouquet name (BOUQ. NAME) & DATE (ref.
par. 15.4)
NOTE: on the bottom display status line the transponder main information is always
shown. For digital transponders: Network name, orbit position, encryption system and
a lock that is closed if the signal is locked. For analogue transponders, a square will be
placed on top of the “AN” writing of the front panel.