R&S 1129.7246.03, Operating Manual

Page: 227 / 855

R&S ESU Instrument Functions
Analyzer Mode
4.196 Operating Manual 1302.6163.12 - 03
Measurement of signal/noise power density (C/No) of an IS95 CDMA signal
(frequency 800 MHz, level 0 dBm)
[ PRESET ] Set the R&S ESU to the default setting.
[ FREQ: CENTER :
800 MHz ]
Set the center frequency to 800 MHz.
[ AMPT : 0 dBm ] Set the reference level to 0 dBm.
MEAS ] Call the menu for the measurement functions.
[ CHAN PWR / ACP ] Select the channel and adjacent-channel power measure-
ment. The measurement is performed with the default set-
ting or a previously defined setting. The submenu for
setting the desired new configuration is opened.
[ CP/ACP CONFIG ] Call the submenu for defining the channel configuration.
[ NO. OF ADJ CHAN : 0
ENTER ]
Do not select an adjacent channel for the measurement,
i.e. the measurement is carried out in one channel only.
[ CHANNEL
BANDWIDTH : 1.23 MHz ]
Set the channel bandwidth to 1.23 MHz in line with IS95.
[ ADJUST SETTINGS ] Set the optimum span (= 5 MHz), resolution bandwidth
(RBW = 30 kHz), video bandwidth (VBW = 300 kHz) and
detector (RMS) for the measurement automatically. The
absolute channel power and the relative power of the
adjacent channels and alternate channels are displayed
on the screen.
Go to the main menu for channel power measurement
[ ADJUST REF LVL ] Set the reference level equal to the channel power mea-
sured.
[ SET CP REFERENCE ] Set the measured channel power as a reference for the
subsequent measurements.
[ CP/ACP ABS / REL ] Select relative measurement related to the reference
power set with
SET REFERENCE (result 0 dB).
[ CHAN PWR / HZ ] Select power measurement related to 1 Hz bandwidth
(result -60.9 dB).
[ FREQ: CENTER : 805
MHz ]
Set the center frequency to 805 MHz. The R&S ESU mea-
sures the channel power at 1.23 MHz bandwidth and out-
puts the result in dB relative to the reference power and 1
Hz bandwidth.
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