ATI Technologies SmartTachSmartTach, User Manual

Page: 73 / 110

PARAMETERS
SmartTach Operating Manual Page 4-43
A1 - Trigger Input Low Peak Voltage
Parameter Group:
InpMon
Purpose: This diagnostic parameter is used to display the current Trigger
Signal input low peak (maximum negative) voltage level. This
effectively allows measurement of the signal's peak voltage without
using external instrumentation.
How to use: The Trigger Low Peak voltage level can be observed in either real-
time or peak-hold mode. The real-time mode is default, this mode
will continuously display the real-time low peak (maximum
negative) voltage level of the Trigger Input. Unlike the peak-hold
mode, the real-time mode will track the high peak level of the
Reference signal both up and down.
The peak-hold mode can be selected by pressing the ENTER
Pushbutton (The arrow symbol will flash). This mode will display and
hold the highest attained (maximum positive) voltage level of the
Trigger Input. Over time, this value will begin to fade down unless
refreshed by more reference pulses of equal or greater magnitude.
The voltage measurement range is dependent on the setting of the
Trigger Input Attenuator parameter. If the Attenuator is disabled
(default), the voltage measurement range is -5.12 to +5.08 volts in
0.04 volt increments. If the Attenuator is enabled, this range
increases to -25.6 to +25.4 volts in 0.2 volt increments.
NOTE: The Input Signal Conditioning Select parameter(06) must be
set to TRG for this function to work properly.