Selects the active marker (1 to 6). The underlined number indicates the active marker.

Turns On or Off the currently active marker.

Turns On a delta marker and prompts for a delta offset frequency, either positive or negative, from the frequency of the currently active marker.

This key places the currently active marker on the highest signal amplitude currently displayed on screen.

Moves the frequency noted by the active marker to the center frequency position and center of the display.

Causes the amplitude of the currently active marker to become the reference level, which is the top horizontal line of the display.

Brings up a secondary menu of peak searching options. Refer to Marker and Peak Menu.

Opens a submenu of additional Marker options. Refer to Marker 2/2 Menu.

 

Places the currently active marker on the highest amplitude signal currently on screen.

From the current position of the active marker, the instrument searches to the left (toward lower frequencies) for a peak signal that rises at least a certain amount above the average noise level. If no such peak is found, the marker is placed at the left end of the trace. The Peak Threshold key allows the user to specify the performance of peak searching.

From the current position of the active marker, the instrument searches to the right (toward higher frequencies) for a peak signal that rises at least a certain amount above the average noise level. If no such peak is found, the marker is placed at the right end of the trace. The Peak Threshold key allows the user to specify the performance of peak searching.

Sets the total span width to the value of the delta marker. If the delta marker is zero, the span is set to 10 Hz. If there is no delta marker, or the delta marker value is set to less than 10 Hz, then the span will be set to 10 Hz.

Sets the center frequency to the frequency of the currently active marker.

Sets the reference level, top graticule line, to the amplitude of the currently active marker.

Sets the percentage of the current display that a signal must rise before it is considered a peak. For example, 10% is one division of the ten division graticule.

Returns to the Marker Menu.

Turns the markers into noise markers with units of dBm/Hz. When this option is selected, the detection method is automatically changed to RMS and the displayed value is compensated for the noise bandwidth of resolution bandwidth filter.

Causes a table to be displayed below the sweep window. The table is automatically sized to display all markers that are turned on. In addition to the marker frequency and amplitude, the table also shows delta frequencies and amplitude deltas for all markers that have deltas entered for them. If Large is selected, a large screen display opens underneath the graph that displays both frequency and amplitude for the active marker in large type.

Turns off all markers.

Sets the frequency counter mode for the active marker. Marker frequency values are normally limited in resolution to individual display pixels. Each pixel may represent multiple frequencies. In the frequency counter mode, in the region of the counter marker, higher resolution digital signal processing is used to determine the frequency. Using Counter Marker in association with Marker to Peak will result in the frequency of the signal peak to a much higher displayed resolution. Note that frequency accuracy is affected by the RBW setting and sweep times may be longer when using counter marker because of the additional signal processing.

If a signal standard has been selected, pressing this key brings up a dialog box to select a channel. Select a channel number for the current signal standard, and the active marker will be set to the center frequency of the channel.

If no signal standard has been selected, a message “No standard selected. Press Enter or Escape to Continue.” is displayed. Press either button to leave the settings as they were before the key was pressed.

This key changes the behavior of the reference markers. If Fixed is selected, reference markers stay at the amplitude they were at when the associated delta marker was turned on. If Tracking is selected, the amplitude of the reference marker changes as the signal amplitude is changed. Note that the reference marker tracks the amplitude, not the frequency of a signal.

Selects whether Marker 1 is the reference for all six delta markers, or whether each of the six reference markers has an associated delta marker.

Returns to the Marker Menu.