Spectrum Measurements
R&S
®
ESR
452
User Manual 1175.7068.02 ─ 12
The R&S
ESR is in its default state.
2. Set the center frequency to 1950 MHz by pressing the [FREQ] key and entering
"1950 MHz".
3. Switch on the ACLR measurement for W-CDMA.
a) Press the [MEAS] key.
b) Press the "Ch Power ACLR" softkey.
c) Press the "CP/ACLR Standard" softkey.
d) In the standards list, select
W-CDMA 3GPP REV
.
The R&S
ESR sets the channel configuration to the 3GPP W-CDMA standard
for mobiles with two adjacent channels above and below the transmit channel.
The frequency span, the resolution and video bandwidth and the detector are
automatically set to the correct values. The spectrum is displayed in the upper
part of the screen and the channel power, the level ratios of the adjacent chan-
nel powers and the channel configuration in the lower part of the screen. The
individual channels are displayed as vertical lines on the graph.
4. Set the optimum reference level and the RF attenuation for the applied signal level.
a) Press the "Adjust Ref Level" softkey.
The R&S
ESR sets the optimum RF attenuation and the reference level for the
power in the transmission channel to obtain the maximum dynamic range. The
following figure shows the result of the measurement.
Figure 6-33: Measuring the relative adjacent channel power on a W-CDMA uplink signal
Advanced Measurement Examples
