Freedom R8100 SERIES, Operator'S Manual

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Auto – If a signal satisfying the Trigger Edge and Trigger Level settings is present the display will sweep
as in Normal mode. If no signal satisfying the Trigger Edge and Trigger Level settings is present then the
display sweeps continuously until a signal satisfying the settings is acquired.
Normal – The display sweeps only when the input signal satisfies the Trigger Edge and Trigger Level
settings.
Single – The display sweeps once after a key press is performed on the Single soft key.
Freeze – The display sweeps stop, allowing further analysis of the captured input signal.
Trigger Level
Adjusts the signal threshold at which a horizontal sweep is initiated. The soft key activates a numeric
entry box and the Left/Right (◄►) keys move the highlight over the desired number field. Numeric
changes are entered directly with the keypad, or in steps using the Up/Down (▲▼) keys or spin knob.
Trigger Position
Submenu selections for the amount of pre-trigger waveform displayed on the screen. The choices are
10%, 50%, or 90% of the display allocated to the waveform preceding the trigger threshold.
Trigger Edge
Submenu for choosing which waveform edge triggers the modulation scope sweep. The selections are
Rising, Falling, or Either.
Vertical Position
Adjusts the vertical position of the waveform on the display using a horizontal submenu. Pressing the
Move Up and Move Down soft keys shifts the waveform position by fixed increments.
Set DC Offset
Pressing this soft key zeros or compensates for any accumulated DC offset caused by drift in the input
amplifier of the R8100 over long periods of time. This may show up as a DC level indicated on the
Oscilloscope and DC Voltmeter when no input is connected to the Meter In port. With the Meter In port
disconnected press the soft key to eliminate the offset. The compensation is stored permanently in the
R8100 until the next time this soft key is pressed.
2.2.4.4 Bar Graphs settings
The R8100 Bar Graph display provides a simultaneous analog and digital readout of critical signal
characteristics. The analog display facilitates real time tuning adjustments of 2-way radios while the
digital reading provides precision in the measured result. Access the Bar Graphs using the Select Display
soft key to bring up the horizontal submenu display choices. Three bar graphs are displayed for the
received carrier while in Monitor mode (see Figure 3.2.5.4-1):
Monitor Deviation
Displays the negative and positive peak frequency deviation of a modulated carrier (i.e. from the
Frequency Error mean), available when Modulation mode is FM.