Profile Operation Mode Procedures
6-14 PN: 10585-00001 Rev. P ML2437A/38A OM/PM
including the cursors. By placing the cursors on the top of a pulse, the flat top power
can be measured. By placing the cursors with a period of the pulse, the average power
of the pulse is calculated. This is more accurate than a simple duty cycle calculation
which makes assumptions about the pulse shape. Use the SENSOR > AVERAGE menu
to enable this readout method.
Advanced Triggering and Setup Options
The other aspects of triggering allow for fine tuning of the trigger conditions. This includes:-
• Selection of HIGH or LOW going edge in External TTL.
• Level setting on Internal A or B trigger, as well as polarity - HIGH or LOW going.
• ARMING via an External BLANKING input. When ARMING is set to Blanking ON,
only samples taken when the rear panel Digital Input BNC is active will be averaged in
the measurement. The polarity of the rear panel Digital Input BNC signal can be set
(high or low) using the System > Rear Panel > BNC > TTL LEVEL menu setting. When
ARMING is set to Blanking OFF, all samples are read.
• In the SYSTEM > more > more > GRAPHICS menu, there are options for:
(a) CONNECT points. With this ON (default) the data points are connected with vectors to
resemble a real time trace. When OFF, the data points are displayed as data points only, with
no connecting line. This can give a faster display update, however, it may be confusing as
near vertical lines will have very few points defined within them.
(b) If Tracking min/max is selected for the CHANNEL being used for the PROFILE, it is
possible to configure the tracking min/max to display the min and max values for all the data
BETWEEN THE CURSORS. This provides easy access to peak values within a time-window;
for example, the top of a pulse.
When set to SINGLE it is updated EACH SWEEP and reflects the min and max values only
within that sweep.
When set to INFINITE, it maintains the min/max from the point it is started until it is reset,
updating the MAX if it sees a HIGHER measurement within the CURSOR window, and
updating the MIN readout if or when it sees a lower value than that which it has already.
This option, in the SYSTEM menu, is only a preferences option and not the main control for
the feature.
Note
The display resolution is 200 pixels. Consider this effect on the resolution of timing
data. For example, a 1 millisecond PROFILE window would have a cursor
resolution on the display of 5 microseconds.
The LIMITS test functions on PROFILE data, and can be configured to BEEP on
fail conditions.
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