Basic Operation

Configuring the RF Output

8. Use the knob to adjust the frequency back to 700 MHz.

Setting the Frequency Reference and Frequency Offset

The following procedure sets the RF output frequency as a reference frequency to which all other frequency settings are relative. When the frequency reference is set, the display will read 0.00 Hz (the frequency output of the signal generator’s hardware minus the reference frequency). Although the display changes, the actual frequency output is 700 MHz (from step 8 above). Any subsequent frequency changes are shown as increments or decrements to the 0 Hz reference.

The Frequency Reference Set function is not an active function. Once it is set, any change to the frequency setting appears as a frequency reading on the signal generator’s front- panel display. For example,

1.Preset the signal generator: Press Preset.

2.Set the frequency reference to 700 MHz:

Press: Frequency > 700 > MHz > More (1 of 3) > Freq Ref Set.

This activates the frequency reference mode, sets the output frequency (700 MHz) as the reference value, and toggles the Freq Ref softkey On. The FREQUENCY area displays 0.000 Hz. This reading is the frequency output of the signal generator’s hardware (700 MHz) minus the reference value

(700 MHz). The signal generator’s true output frequency is 700 MHz. If the Freq Ref softkey is toggled to Off, the front- panel will indicate the actual frequency: 700 MHz. The REF indicator appears on the front- panel display and the Freq Ref Off On softkey toggles to On.

3.Turn on the RF output: Press RF On/Off.

The display annunciator changes from RF OFF to RF ON. The RF frequency at the RF OUTPUT connector is 700 MHz.

4. Set the frequency increment value to 1 MHz: Press Frequency > Incr Set > 1 > MHz.

5.Increment the output frequency by 1 MHz: Press the up arrow key.

The FREQUENCY area display changes to show 1.000 000 000 MHz, which is the frequency output by the hardware (700 MHz + 1 MHz) minus the reference frequency (700 MHz). The frequency at the RF OUTPUT changes to 701 MHz.

6.Enter a 1 MHz offset: Press More (1 of 3) > Freq Offset > 1 > MHz.

The FREQUENCY area displays 2.000 000 00 MHz, which is the frequency output by the hardware (701 MHz) minus the reference frequency (700 MHz) plus the offset (1 MHz). The OFFS indicator activates. The frequency at the RF OUTPUT connector is still 701 MHz.

Setting the RF Output Amplitude

1.Preset the signal generator: Press Preset.

The AMPLITUDE area of the display shows the minimum power level of the signal generator. This is the normal preset RF output amplitude.

2.Turn on the RF output: Press RF On/Off.

The display annunciator changes to RF ON. At the RF OUTPUT connector, the RF signal is output at the minimum power level.

Chapter 2

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Agilent Technologies E8257D PSG Setting the Frequency Reference and Frequency Offset, Setting the RF Output Amplitude

E8267D PSG, E8257D PSG specifications

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