Waveform / ‘Scope Mode, Continued…
Descriptions below refer to these pictures and the one at the top of the previous page.
½ Trapezoid CW Envelope WFM / Trapezoid
AM Modulation WFM / PWR
Wfm Style Button: Selects the desired ‘scope display from these choices…
Wfm: Standard ‘scope display… shown top of previous page.
½ Trap: Top half of a trapezoidal display plots exciter output vs. amplifier output and displays a triangular image that easily shows when the output of the
amplifier becomes nonlinear, ie. flat tops and no longer provides the same gain as at lower power. Also shows other distortions of the input signal. Using
half the normal trapezoid allows displaying twice the vertical resolution.
Scope: Shows the modulation signal, ie. demodulated audio. Not shown.
Wfm/Trap: Split screen of the transmitted waveform on the left of the screen and trapezoid on the right side.
Wfm_Pwr: Displays the transmitted waveform on the left of the screen, and Power/SWR on the right side.
Touch Screen Controls…
The touch screen serves a couple functions. It adds additional buttons that the
user can access by pressing with his finger or a stylus, and it allows the user to
control cursors which allow the user to make voltage and time measurements.
Cursor Button: Pressing this button cycles through four cursor modes.
Selecting Cursor 1 displays a blue crosshair, which allows the user to set a
position on the waveform in either voltage or time, or both. The corresponding
voltage and the total time from the left edge of the display are displayed
numerically. Selecting Cursor 2 adds a second cursor with green crosshairs. In
this mode, the numerical readout shows the time difference between Cursor
1 and Cursor 2. The voltage displays 0. Pressing the cursor button again turns
on the Peak Pwr Markers. The fourth position is OFF.
Freeze Button: To aid in setting the cursors and making measurements,
pressing this button causes the waveform to freeze.
Trigger Button: This button selects the trigger mode when one of the USER sweep presets is selected. The selection is saved as a custom user preset.
The button only works when a USER preset is selected, but always displays the current trigger setting, even in factory sweep preset positions.
Sweep Button: Selects the desired sweep rate when the Sweep preset is set to one of the USER choices. The setting is saved in memory along with
trigger mode. The sweep rate can be modified by rotating the Adjust knob to any desired value.
Power Display: A numeric display below the Sweep button which shows the current transmitted power level. When moving Cursor 1, the power display
shows calculated power based on the cursor position rather than transmitted power.
Trg Norm, Trg +, Trg -, Trg +/-, Trg Off
1.0 ms/div, 2.0 ms/div, 5.0 ms/div, 10.0 ms/div
Cursor 1, Cursor 2, Peak Marker, Cursor Off
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