Rohde & Schwarz R&S FSL3 - Measurement Example 1 - ACPR Measurement on an CDMA 2000 Signal

Measurements on Modulated Signals R&S FSL
1300.2519.12 2.26 E-11
Measurement example 1 – ACPR measurement on an CDMA 2000 signal
Test setup:
Signal
generator
R&S FSL
Signal generator settings (e.g. R&S SMU):
Frequency: 850 MHz
Level: 0 dBm
Modulation: CDMA 2000
Procedure:
1. Set the R&S FSL to its default state.
 Press the PRESET key.
The R&S FSL is in its default state.
2. Set the center frequency to 850 MHz and span to 4 MHz.
 Press the FREQ key and enter 850 MHz.
 Press the SPAN key and enter 4 MHz.
3. Set the reference level to +10 dBm.
 Press the AMPT key and enter 10 dBm.
4. Configuring the adjacent channel power for the CDMA 2000 MC1.
 Press the MEAS key.
 Press the CP, ACP, MC–ACP softkey.
 Press the CP / ACP Standard softkey.
 In the standards list, mark CDMA 2000 MC1 using the rotary knob or the arrow keys and confirm
pressing the rotary knob or the ENTER key.
The R&S FSL sets the channel configuration according to the 2000 MC1 standard for mobile
stations with 2 adjacent channels above and below the transmit channel. The spectrum is
displayed in the upper part of the screen, the numeric values of the results and the channel
configuration in the lower part of the screen. The various channels are represented by vertical
lines on the graph.
The frequency span, resolution bandwidth, video bandwidth and detector are selected
automatically to give correct results. To obtain stable results – especially in the adjacent
channels (30 kHz bandwidth) which are narrow in comparison with the transmission channel
bandwidth (1.23 MHz) – the RMS detector is used.