Marker OperationCaution

The synthesizer has five frequency markers that can be used as fixed frequency “landmarks,” or as variable frequency pointers on a CRT display. To view the marker features of the synthesizer on a CRT, connect the synthesizer as shown in Figure 1-8.

Refer to menu map 2, FREQUENCY.

Press [PRESET).

Press (START) @ @&).

Press (STOP) 0 [GHz).

Press [MARKER).

Select Marker Ml and enter @ (GHz.

The synthesizer is sweeping from 3 to 7 GHz, with a 100 ms sweep speed. A frequency marker is set at 4 GHz, which causes an intensified dot to appear on the CRT. To obtain an amplitude spike at that frequency, select Amp1 Markers . Notice that you can set the amplitude of the spike with the rotary knob or entry keys. To return to the intensified dot representation, select Amp1 Markers (asterisk off).

Amplitude markers increase the output power at the marker frequency. Provide protection to devices that could be damaged.

For a second marker, select Marker M2 and enter @ 0 @ (GHz).

This process can be continued for all five markers. Note that the marker displayed in the active entry area is “active” and can be controlled by the rotary knob, arrow keys, and numeric entry keys.

Once the Ml and M2 markers are established, the marker sweep function, softkey MI--M2 Sweep, temporarily changes the original start/stop frequencies to those of markers Ml and M2. Select Ml--M2 Sweep. Notice that the synthesizer now is sweeping from 4 to 5.5 GHz. Use this function to focus in on a selected portion of the frequency sweep. Select Ml--M2 Sweep again. This turns the function off and returns the synthesizer to its original sweep parameters. To change the start/stop frequencies for the synthesizer, not just temporarily, use the softkey Start-Ml Stop'M2 .

As an example of the delta marker function:

Select Marker M3 and enter @ 0 0 IGHz).

Select Delta Marker.

The frequency difference between marker 3 and marker 1 is displayed, and the CRT trace is intensified between the two markers. The active entry area displays:

--> D E L T A M K R (3-l) : 2 7 0 0 . 0 0 0 0 0 0 M H z

1-14 Getting Started Basic