Agilent Technologies 8935 series e6380a manual Pos/Neg, Ref Level, Ref Mrkr

Analog Measurements - Screens and Control Fields

Control Fields for Analog Measurements

Pos/Neg

See “Level (div)” on page 202

Ref Level

Reference level sets the amplitude reference level for the top line of the display. All signals displayed are referenced to this line.

Operating Considerations

The unit-of-measure for the reference can be changed as needed. For instance, 0 dBm, 0.224 V, 107.0 dBmV, and 0.00100 W can all be used to represent the same level.

Screens on which this field is displayed

SPEC ANL: main controls menu

Ref Mrkr

In the delta marker mode, a second (reference) marker is placed at the current location of the marker. The first marker becomes a moveable delta marker. When the delta marker is moved, the difference in frequency and level between the reference marker and the delta marker are shown as the Delta Mrkr measurements on the right-hand side of the screen. The reference marker can be set to either Hold or Norm.

When the Ref Mrkr field is set to Hold, the reference marker is frozen at its current position (frequency and level) regardless of changes in the signal level.

When you switch from Hold to Norm, the reference marker will stay at its current horizontal setting (frequency), but will track the level of the incoming signal.

When switching from delta mode to normal mode, the delta marker becomes the normal marker.

Screens on which this field is displayed

SPEC ANL: all menus except mask controls

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