Rohde & Schwarz R&S FSP Series, Руководство по эксплуатации

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R&S FSP Getting Started
Measurements on Modulated Signals
2.30 Operating Manual 1164.4556.12 - 06
2.5.3.1 Measurement Example 1 – ACPR measurement on an IS95 CDMA Signal
Test setup:
Settings on the signal generator (e.g. R&S SMIQ):
Measurement with the R&S FSP:
1. Set the R&S FSP to its default state.
➢
Press the PRESET key.
The R&S FSP is in its default state.
2. Set the center frequency to 850 MHz and frequency deviation to 4 MHz.
➢
Press the FREQ key and enter 850 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 IS95 reverse link.
➢
Press the MEAS key.
➢
Press the CHAN PWR ACP ! softkey.
➢
Press the CP/ACP STANDARD softkey.
From the list of standards, select CDMA IS95A REV using the spinwheel or the
cursor down key below the spinwheel and press ENTER .
The R&S FSP sets the channel configuration according to the IS95 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.
Frequency: 850 MHz
Level: 0 dBm
Modulation: CDMA IS 95
Signal
generator
FSP