Philips PM3350A - Performing Amplitude Measurements

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4 APPUCATIONS
4.3.2 PERFORMING AMPLITUDE MEASUREMENTS
NOTE:In the following sections the MAIN cursors are always printed in
BLUE, the LOCATE cursors in RED
vpp Peak-to*peak voltage
The Vpp amplitude measurement is calculated over the signal lying between the
MAIN CURSORS. It Is necessary to set the main cursors on the wanted trace,
using the CURSOR-SELECT menu and on the required part of the signal, using
the CURSOR-CONTROL menu.
By activating the Vpp calculation function, the oscilloscope will automatically
measure the peak-to-peak voltage, and will show the measuring points by two
small LOCATE CURSORS.
The measuring result is shown in the top text area. If the VAR rotary knob of the
channel is in CAL position, the result will be displayed in Volts. If the VAR rotary
knob Is In UNCAL position, the result will be displayed In Divisions;
Vpp = ... mV, or Vpp = ... DIV
ABS Absolute
The ABS amplitude measurement will be calculated from the MAIN CURSORS
related to the absolute zero level. This zero level Is Indicated as a horizontal
dotted line and is related to the grounded Y position. The correct way to use this
function is:
- activate the ABS function.
. ground the trace and adjust the zero level anywhere on the screen, by means
of the Y POS rotary knob.
- press the GND key once again (the signal is now connected to the channel).
Do not re-adjust the Y POS rotary knob anymore.
The measuring result is shown in the top text area. If the VAR rotary knob of the
channel is in CAL position, the result will be displayed in Volts. If the VAR rotary
knob Is in UNCAL position, the result will be displayed in Divisions:
ABS: C1 = ... mV, C2 = ... mV, or Cl = .. DIV, C2 = .. DIV
4.3 MENUS AND MEAS JHEMENTS