Philips PM2528 Operating Manual page 55

55
Measuring modes on V * and Vv :
~ Internal! starting'of measurements (INT START, fig. 18).
Measurements are continuously repetitively started by the PM2528.
The displayed value is the highest (V * } or lowest (V v_) vaiue of a signal over a fixed period of about
200ms, !n this mode, periodical signals with a frequency between 10Hz and 100kHz can be measured.
t
ees CYCLE 1 Tecate CYCLE 2
DISPLAY 0 DISPLAY t DISPLAY 2
Vi=t6 Via 6 vena?
Vat Vent Veet
Fig. 18. V* and Vv measurement in INT START mode,
— External or manual starting and stopping of a measurement (fig. 19).
The displayed value is the highest (V"* } or lowest (V v } value of the input signal. Commands are given in the
EXT or MAN start mode. At the first (start) command the measurement is started. At the second (stop)
command the measurement stops. The peak value, measured in the preceding measuring period, is displayed.
During this measuring period the dispiayed value is the peak value found until that moment.
The LED in the EXT or MAN push-button blinks during a measurement. In this mode it is possible to measure
the maximum or minimum value of a signal during a time determined by the user, In this way, low frequency
signals can be measured.
START STOP
DISPLAY: 1 3 6 6
Fig. 19. V* measurement in MAN or EXT START mode.