R&S FSW Series - Page 149

Measurements and Results
R&S
®
FSW
149User Manual 1173.9411.02 ─ 43
Table 7-7: Signal generator settings (e.g. R&S SMW)
Frequency 890 MHz
Level 0 dBm
Modulation GSM, one timeslot activated
The measurement is based on the example "Measuring the Power of a GSM Burst
During the Activation Phase" on page 147.
1. Switch off the power measurement.
a) Press the [MEAS] key.
b) Select "Zero Span".
2. Increase the time resolution by setting the sweep time to 100
µs ([SWEEP] >
"Sweep Time Manual").
3. Shift the rising edge of the GSM burst to the center of the display by defining a trig-
ger offset.
a) Press the [TRIG] key.
b) Select "Trigger Offset".
c) By turning the rotary knob counterclockwise, reduce the trigger offset until the
burst edge is displayed in the center of the display, or enter -50
µs.
The R&S FSW displays the rising edge of the GSM burst.
Figure 7-16: Rising edge of the GSM burst displayed with high time resolution
4. Move the falling edge of the burst to the center of the display. To do so, switch the
trigger "Slope" to "Falling" ([TRIG] > "Trigger/ Gate Config").
The R&S FSW displays the falling edge of the GSM burst.
Basic Measurements