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On the Keysight NFA Series of Noise Figure Analyzers is it possible to query the RF attenuator range while in the auto range mode?

The command to query the Keysight NFA RF attenuator while in the auto ranging mode is:

DIAG:BLU:RF:RANG?

The command will return a value of:

  • 0 for 0 dB attenuation
  • 1 for 5 dB attenuation
  • 2 for 10 dB attenuation
  • 3 for 15 dB attenuation
  • 4 for 20 dB attenuation
  • 5 for 25 dB attenuation
  • 6 for 30 dB attenuation
  • 7 for 35 dB attenuation
  • 8 for 40 dB attenuation

This command is not documented in either the Noise Figure Analyzers NFA Series User’s Guide or within the Noise Figure Analyzers NFA Series Programmer’s Reference.

文档和下载

NFA Series User's Guide, N8972-90086 
The Keysight Noise Figure Analyzer (NFA) User's Guide. Consistent with firmware version A.01.01.

用户手册 2001-05-01

NFA Noise Figure Analyzer Programmer's Guide  
Programmer's guide with explanations on how to program the analyzer using SCPI commands. For use with the NFA Series noise figure analyzers: N8972A, N8973A, N8974A, N8975A.

编程和语法指南 2001-05-01

null PDF 3.32 MB
NFA Series Noise Figure Analyzer, Programming Examples 
This Product Note contains programming examples of measurement scenarios written in pseudo code, to enable the automated control of the NFA Series Noise Figure Analyzers using SCPI standard commands.

应用说明 2000-11-27

null PDF 1.19 MB
请问噪声系数分析仪 (NFA) 衰减器是如何工作的?怎样对其进行设置? 
在进行校准 ([Calibrate]) 后,噪声系数分析仪 (NFA) 会将衰减器设置到满足噪声输入电平的最佳值...

常见问答 2010-09-14