Digital Mod. Power Level Accuracy Relative to CW

(N5162A / N5166B / N5172B / N5182A / N5182B / N5182N Only)

This test compares the digital modulation power level to the CW power level at the same frequency. The external I/Q inputs are driven by a signal generator. A power meter and power sensor are used to measure the DUT output power in CW mode and in digital-modulation mode. The difference between the two power levels is compared to the specifications.

Required Test Equipment

Test Equipment

Recommended Models

Alternate Models

External Baseband
Signal Generator

N5182B Opt 656 or 657

N5182A Opt 651, or 652, or 654
N5172B Opt 653 or 655 or 657
E4438C Opt 001 or 002 or 601 or 602, and Opt 4001
E4430B/31B/32B/33B/34B/35B/36B/37B Opt UN8 & Opt 2002

Power Meter

N1914A3

E4419A/B
E4418A/B
N1911A/12A/13A

Power Sensor

E9304A

E9304A Opt H18
N8482A
N8482A CFT
U8481A4 Opt 200
U8485A4 Opt 200
  1. Option 400 is required only if testing models N5166B, N5172B, N5182B, or N5182N.
  2. Option 200 is required only if testing models N5166B, N5172B, N5182B, or N5182N.
  3. Power meter N1914A with serial numbers ranging between MY00000000—MY53040007 require Service Note 07 to be applied for measurement repeatability. Please have this service note applied or verify it was applied before using this power meter. The affected service note is http://literature.cdn.keysight.com/litweb/pdf/N1914A-07.pdf
  4. Requires power meter N1914A with USB ports. Refer to the main Required Equipment table for more information.

Connections and Setup Procedures
  • All test equipment requires a 30 minute warmup period to ensure accurate performance.
  • In the following test setup, cables are designated as solid lines and direct connections are designated as dashed lines.
  1. Connect all test equipment as shown.
  2. Connect GPIB cables to all GPIB-controlled test equipment.
  3. While performing this test, follow all instructions on the controller display.

 

Flexible power sensor channel assignment

This test uses flexible power sensor channel assignment and will identify the channel that a power sensor is connected to using the ability of "smart" sensors such as the N848xA, U848xA, and E930xA series to report their full model and serial number.

Select from the links below for connection setups depending on the power sensor.

ClosedSetup using standard power sensors

 

ClosedSetup using USB power sensors

In Case of Difficulty

If this performance test fails, perform the following steps in order:

  1. Check the equipment setup (see above). If the setup is incorrect, make the necessary corrections and rerun the performance test.

  2. Refer to the troubleshooting section of the service guide. If you do not have a printed copy of the service guide (Option OBW), one is available either on the CD-ROM that came with your signal generator shipment or search for your signal generator model number on the Keysight website.

  3. If necessary, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.