Quick Start
R&S
®
FSVA/FSV
103Operating Manual 1176.7510.02 ─ 09
Table 2-7: Signal generator settings (e.g. R&S SMU)
Frequency 128 MHz
Level -30 dBm
Modulation 50 % AM, 1 kHz AF
1. Set the signal analyzer to the default state by pressing the PRESET key.
The R&S FSVA/FSV is set to its default state.
2. Set the center frequency to 128 MHz and the span to 0 Hz.
a) Press the FREQ key and enter 128 MHz.
b) Press the SPAN key and enter 0 Hz or press the "Zero Span" softkey.
3. Set the sweep time to 2.5 ms.
a) Press the SWEEP key.
b) Press the "Sweeptime Manual" softkey.
c) Enter 2.5 ms.
4. Set the reference level to +6 dBm and the display range to linear.
a) Press the AMPT key and enter 6 dBm.
b) Press the "Range" softkey.
c) Press the "Range Linear %" softkey.
5. Set triggering in response to the AF signal by using the video trigger to produce a
static image.
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 50%.
The trigger level is displayed as a horizontal line across the entire measure-
ment diagram. The R&S FSVA/FSV displays the 1 kHz AF signal as a static
image in zero span. Use a headset to listen to the AF.
6. Activate the internal AM demodulator.
a) Press the MKR FUNC key.
b) Press the "Marker Demod" softkey.
The R&S FSVA/FSV automatically switches on the AM audio demodulator. A 1
kHz tone can be heard over headset. If necessary, use the volume control knob
for AF OUTPUT on the front panel to turn up the volume.
2.5.4 Measurements in Zero Span
For radio transmission systems that use the TDMA method (e.g. GSM or IS136), trans-
mission quality is determined not only by spectral characteristics but also by character-
istics in zero span. A timeslot is assigned to each user since several users share the
same frequency. Smooth operation is ensured only if all users adhere exactly to their
assigned timeslots.
Basic Measurement Examples
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