R&S ESR

Basic Measurement Examples
R&S
®
ESR
101Getting Started 1316.3749.02 ─ 09
Table 7-7: Signal generator settings (e.g. R&S SMU)
Frequency 890 MHz
Level 0 dBm
Modulation GSM, one time slot is switched on
1. Set the signal analyzer to the default state by pressing the [PRESET] key.
The R&S ESR is set to its default state.
2. Select "Spectrum" mode.
3. Set the center frequency to 890 MHz, the span to 0 Hz and the resolution
bandwidth to 1 MHz.
a) Press the [FREQ] key and enter 890 MHz.
b) Press the [SPAN] key and enter 0 Hz or press the "Zero Span" softkey.
c) Press the [BW] key.
d) Press the "Res BW Manual" softkey and enter 1 MHz.
4. Set the reference level of the R&S ESR to 0 dBm (= level of the signal genera-
tor) by pressing the [AMPT] key and entering 0 dBm.
5. Set the sweep time to 2 ms.
a) Press the [SWEEP] key.
b) Press the "Sweeptime Manual" softkey and enter 2 ms.
The R&S ESR shows the GSM burst continuously across the display.
6. Use the trigger source "Video" and the trigger polarity "Pos" to trigger on the
rising edge of the burst and shift the start of burst to the center of the screen.
a) Press the [TRIG] key.
b) Press the "Trg/Gate Source" softkey and select "Video" using the arrow
keys.
c) Press the "Trg/Gate Level" softkey and enter 70%.
The R&S ESR shows a static image with the GSM burst at the start of the
trace.
d) Press the "Trigger Offset" softkey and enter -1 ms.
The R&S ESR shows the GSM burst in the right half of the measurement
diagram.
7. Configure the power measurement in zero span.
a) Press the [MEAS] key.
b) Press the "Time Domain Power" softkey to open the submenu.
c) Switch the "Limits" softkey to "On."
d) Press the "Left Limit" softkey.
Measurements in Zero Span