Getting Started Manual
WP7Zi-GSM-E RevB
74
Variable Gain
Variable Gain lets you change the granularity with which the gain is
incremented. For example, when
Variable Gain
is disabled, the gain
increases or decreases in preset increments each time you touch the
Up/Down
buttons.
However, when
Variable Gain
is enabled, you can increase or decrease the
gain in increments as small as 0.1 mV/div, depending on the waveform
scale.
Enabling Variable Gain
1.
Touch the descriptor label for the waveform whose gain you want
to vary.
2.
Touch the
Variable Gain
checkbox.
Channel Deskew
Unlike the Deskew math function, channel Deskew does no resampling,
but instead adjusts the horizontal offset by the amount that you enter. The
valid range is dependent on the current ti/- 9 divisions.
Channel Deskew Setup
1.
In the menu bar, touch
Vertical
; from the drop-down menu, select a
channel to set up.
2.
Touch inside the
Deskew
data entry field and enter a value using
the pop-up numeric keypad.
Response Optimization Modes
Group delay is defined as the rate of change of the total phase shift with
respect to angular frequency through a device or transmission medium.
Amplifiers in analog oscilloscopes always had some group delay at the
highest frequencies, and this inherent group delay minimized the preshoot
present on a step response, giving the traditional "pulse response."
