Agilent Technologies E4406A Adjust Input Attenuation and Input Power, Adjust the IF Align Signal

NOTE

NOTE

Setting the Mode

Mode Setup

Adjust Input Attenuation and Input Power.

•Max Total Pwr key. The Max Total Pwr key can be activated only

when Input Port is set to RF. Max Total Pwr allows you to enter maximum power levels (−15 dBm is the default value) for the RF input. The maximum total power setting is coupled to the input attenuation setting.

•I/Q Input Z key. The I/Q Input Z key can be activated only when Input Port

is set to I/Q. The I/Q Input Z key enables you to choose an input impedance of either 50 Ω or 600 Ω. An input impedance of 600 Ω may be needed for certain telecommunications applications.

•Input Atten key. The Input Atten feature can be activated only when Port is set to RF. The Input Atten feature allows you to enter the attenuation value. The input attenuation can be set at values from 0 to 40 dB in increments of 1 dB. The input attenuation setting is coupled to the maximum total power setting.

The Max Total Pwr and Input Atten settings are coupled together. When you switch to a different measurement, the Max Total Pwr is kept constant, but the Input Atten may change if the two measurements have different mixer margins. Thus, you can directly set the transmitter tester input attenuation, or you can set it indirectly by specifying the maximum expected power at the UUT (Max Total Pwr setting).

Adjust the IF Align Signal.

The IF align signal adjustments are advanced features. IF align rate, amplitude and type should not be modified unless you are familiar with IF align functionality.

•Signal Rate. The signal is modulated by a digital sequence that can be set to 1 of 13 positions (rate 0 through 12) to cause the comb spacing (or pulse timing) of the alignment signal to widen or narrow. At the position of 1 the signal rate is set at its maximum value of 234.375 kHz. This frequency rate value will appear in the softkey label. Each time the position integer is incremented, the signal rate is halved. For example, at a position of 2 the signal rate is 117.188 kHz.

•Signal Amptd key. To modify the signal amplitude you will enter a DAC value between 0 - 4095. The amplitude range is 0 to 50 dB. Incrementing the DAC value increases the amplitude of the signal in a linear fashion, and will be visible on screen. The default DAC value is 500.

•Signal Type key. This menu allows you to select a CW (a tone that appears in the center of the IF), comb, or pulse type signal as the IF align signal.

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