Maximum Output Power — Wide IQ/FM Mode

(E8257D Option HTS, E8267D Option H18, or E8663D HTS Only)

This test verifies that the signal generator provides a functional CW signal with the RF path below 3.2 GHz set to Wide IQ/FM. Maximum output power with Wide IQ/FM On (called Wide FM/fM for Option HTS) is described as a nominal specification. Generally nominal parameters are not tested. Maximum output power with Wide IQ/FM ON is tested because there is a minimum level of functionality that needs to be guaranteed.

During this test, the signal generator is set to its maximum settable output power and a measurement is performed using a power meter. The measured power is compared against a limit that verifies functionality.

Required Test Equipment

Test Equipment

Recommended Models

Alternate Model(s)

Power Meter

N1914A1

E4419A/B (with firmware A2.09.01 or greater when using N-Series sensors)

Power Sensor (Low Frequency)

E9304A H192

E9304A
E9304A Opt H18
U8481A Opt 2003
U8451A Opt 2003
  1. 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: N1914A-07 Service Note.
  2. This sensor model is recommended for the Maximum Output Power tests because it can measure the true maximum output power performance up to +30 dBm. Other sensor models when permitted are adequate to verify conformance to specification, but can only measure true performance up to +20 dBm.
  3. Requires power meter N1914A with USB ports. Refer to the main Required Test Equipment table.

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 performance 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. Legacy 848x series power sensors are unable to provide their model or serial number, but their channel is identified during the sensor calibration process by identifying the channel of the sensor connected to the calibrator.

If the wrong legacy power sensor is connected to the calibrator during this process, the error can be resolved by disconnecting and reconnecting the power sensor to the power meter which will force a new calibration.

Select from the links below for connection setups depending on the power sensor selection. To expand all, click the Expand All button in the toolbar (webhelp only).

 

Power sensor calibration — standard sensor

Measurement setup — standard sensor channel A

Measurement setup — standard sensor channel B

 

 

Power sensor calibration — USB sensors

Measurement setup — USB sensor channel C

Measurement setup — USB sensor channel D

 

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. If this test fails with the equipment set up properly, refer to the troubleshooting section of the signal generator's 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 on the Keysight Website.

  3. If you cannot correct the problem using the troubleshooting procedures in the Service Guide, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.