Agilent Technologies 8935 series e6380a manual Gain Cntl, If Filter

Analog Measurements - Screens and Control Fields

Control Fields for Analog Measurements

Gain Cntl

AF analyzer gain control specifies whether the AF analyzer’s gain settings are controlled automatically by AF autoranging (Auto), or by manual control (Hold).

The following settings are affected by AF autoranging:

•Input Gain

•De-Emp Gain

•Notch Gain

Operating Considerations

The normal mode of operation for the Gain Cntl field is Auto, allowing the instrument to adjust the AF gain settings for optimum measurement accuracy.

This field can be set to Hold to disable the autoranging routines to increase measurement speed. However, this requires you to select the desired gain settings manually for each measurement.

Autoranging Interference After a signal is input, the RF autoranging function (Auto) takes a small amount of time to determine the required input attenuator setting. If your transmitter begins sending information the instant it transmits, the initial part of the demodulated signal may not appear on the oscilloscope. When trying to capture the initial modulation waveform of a signal on the oscilloscope, set the upper field to Hold and set the lower field to an appropriate level for the signal being decoded (start with 40 dB).

Setting the upper field to Hold also prevents the RF autoranging process from interrupting spectrum analyzer operation when a signal is first measured. This can be helpful when you need to see the signal the instant the source is input, but requires you to set the needed amount of input attenuation.

Screens on which this field is displayed

AF ANALYZER

IF Filter

This field selects the desired IF filter bandwidth for modulated signals being analyzed.

Screens on which this field is displayed

RF ANALYZER

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