Specifications

68 Chapter 9
Measuring Digital Communications Signals
Making Burst Power Measurements
Measuring Digital Communications
Signals
Making Burst Power Measurements
PSA and ESA spectrum analyzers make power measurements on
digital communication signals fast and repeatable by providing a
comprehensive suite of power-based one-button automated
measurements with pre-set standards-based format setups. The
automated measurements also include pass/fail functionality that allow
the user to quickly check if the signal passed the measurement.
NOTE ESA spectrum analyzer sweep times: In zero-span, ESA can sweep as
fast as 10
µs with 2 points displayed. For 101 points, the minimum
sweep time is 1 ms. Option AYX or B7D is recommended when faster
sweep times are required.
The following example demonstrates how to make a burst power
measurement on a Bluetooth
 signal broadcasting at 2.402 GHz.
Step 1. Using an ESG, setup a Bluetooth signal transmitting DH1 packets
continuously at 2.402 GHz and
−10 dBm and connect the RF OUTPUT
to the spectrum analyzer RF INPUT.
Step 2. Preset the analyzer, set the analyzer center frequency to 2.402 GHz:
Press
Preset, Factory Preset (if present).
Press
FREQUENCY Channel, Center Freq, 2.402, GHz.
Step 3. Set the analyzer radio mode to Bluetooth and check to make sure
packet type DH1 is selected:
Press
Mode Setup, Radio Std, More, Bluetooth.
Press
Mode Setup, Radio Std Setup, Packet Type (DH1).
Step 4. Select the burst power one-button measurement from the measure
menu and optimize the reference level:
Press
MEASURE, More, Burst Power.
Press
Meas Setup, Optimize Ref Level.
Step 5. View the results of the burst power measurement using the full screen
(See Figure 9-1):
Press
Display, Full Screen.