Rover ST2 - Page 25

pag. 25
ST2 User’s Manual
TV Mode
continuation: SPECTRUM MEASUREMENTS: SPECT
Press the key and use the
keys to select the fi elds to be modifi ed
Press the and keys to vary the selected value.
SPECTRUM SPAN: sweep span in
MHz
CHANNEL NUMBER
CHANNEL FREQUENCY
AUTOMATIC REFERENCE LE-
VEL: Grid reference level va-
lue in dB; this can be varied
manually.
5.1 Spectrum analysis of a digital signal
SPECTRUM ANALYSIS
CURVE: 5 dB division in
almost real time
CLOSED LOCK =
locked signal
OPENED LOCK =
signal not locked
LEVEL/POWER: value in dBuV of the
signal’s level/power according to the
frequency marker
FREQUENCY MARKER: 0,1
MHz resolution
LEVEL MARKER: 0,1 dB
resolution
Fig. 5.1 COFDM MUXLTIPLEX spectrum with 20 MHz SPAN.
5.2 Analogue signal spectrum analysis
SPECTRUM SPAN: sweep span in
MHz
CHANNEL NUMBER
CHANNEL FRE-
QUENCY
AUTOMATIC REFERENCE
LEVEL: Grid reference level
value in dB; can be adjusted
manually.
SPECTRUM ANALYSIS
CURVE: 5 dB division in
almost real time
LEVEL/POWER: SIGNAL
LEVEL/POWER VALUE IN
dBuV at the frequency
marker position
FREQUENCY MARKER: 0,1
MHz resolution
LEVEL MARKER: 0,1 dB
resolution
Fig. 5.2 Analogue channel spectrum with a 10 MHz span
Press the key and use the key to select the fi elds be modifi ed.
Press the and keys to change the value shown.