Measurements and Results
R&S
®
FSW
199
User Manual 1173.9411.02 ─ 43
7.2.6.5
How to Compare the Tx Channel Power in Successive Measurements
For power measurements with only one Tx channel and no adjacent channels, you can
define a fixed reference power and compare subsequent measurement results to the
stored reference power.
1. Configure a measurement with only one Tx channel and no adjacent channels (see
Chapter 7.2.6.2, "How to Set Up the Channels"
2. In the "ACLR Setup" dialog box, select the "Set CP Reference" button.
The channel power currently measured on the Tx channel is stored as a fixed ref-
erence power. The reference value is displayed in the "Reference" field of the
result table (in relative ACLR mode).
3. Start a new measurement.
The resulting power is indicated relative to the fixed reference power.
4. Repeat this for any number of measurements.
5. To start a new measurement without the fixed reference, temporarily define a sec-
ond channel or preset the instrument.
7.2.7
Measurement Examples
The R&S
FSW has test routines for simple channel and adjacent channel power mea-
surements. These routines give quick results without any complex or tedious setting
procedures.
A programming example demonstrating an ACLR measurement in a remote environ-
ment is provided in
Chapter 14.5.3.10, "Programming Examples for Channel Power
Measurement Example 1 – ACPR Measurement on a CDMA2000 Signal
Measurement Example 2 – Measuring Adjacent Channel Power of a W-CDMA
Uplink Signal
Measurement Example 3 – Measuring the Intrinsic Noise of the R&S
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7.2.7.1
Measurement Example 1 – ACPR Measurement on a CDMA2000 Signal
Test setup:
Channel Power and Adjacent-Channel Power (ACLR) Measurement
