Measurements and results
R&S
®
FSVA3000/ R&S
®
FSV3000
152
User Manual 1178.8520.02 ─ 08
7. Set the sweep time to
1
ms
([SWEEP] > "Sweep Time Manual" ).
The R&S
FSV/A shows the GSM burst continuously across the display.
8. Using the video trigger, set triggering on the rising edge of the burst.
a) Press the [TRIG] key.
b) Set the "Trg Source" to "Video".
c) Set the "Trg/Gate Level" to
70%
.
The R&S
FSV/A shows a static image with the GSM burst at the start of the trace.
The trigger level is displayed as a horizontal line labeled with the absolute level for
the trigger threshold in the measurement diagram.
9. Activate power measurement within the activation phase of the burst in zero span.
a) Press the [MEAS] key.
b) Select "Time Domain Power".
c) Select "Time Dom Power Config".
d) Set the "Limits" state to "On".
e) Select the "Left Limit" input field.
f) By turning the rotary knob clockwise, move the vertical line "S1" to the start of
the burst.
g) Select the "Right Limit" input field.
h) By turning the rotary knob clockwise, move the vertical line "S2" to the end of
the burst.
The R&S
FSV/A displays the average (mean) power during the activation phase of
the burst.
Figure 5-14: Measurement of the average power during the burst of a GSM signal
Basic measurements
