Agilent Technologies InfiniiVision 4000 X-Series, Programmer'S Manual

Page: 466 / 1352

466 Agilent InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide
21
:MEASure Commands
:MEASure:TEDGe
(see page 1208 )
Query Syntax
:MEASure:TEDGe? <slope><occurrence>[,<source>]
<slope> ::= direction of the waveform. A rising slope is indicated by a
space or plus sign (+). A falling edge is indicated by a
minus sign (-).
<occurrence> ::= the transition to be reported. If the occurrence number
is one, the first crossing from the left screen edge is
reported. If the number is two, the second crossing is
reported, etc.
<source> ::= {<digital channels> | CHANnel<n> | FUNCtion<m> | MATH<m>
| WMEMory<r>}
<digital channels> ::= DIGital<d> for the MSO models
<n> ::= 1 to (# of analog channels) in NR1 format
<m> ::= 1-4 in NR1 format
<r> ::= 1 to (# ref waveforms) in NR1 format
<d> ::= 0 to (# digital channels - 1) in NR1 format
When the :MEASure:TEDGe query is sent, the displayed signal is searched
for the specified transition. The time interval between the trigger event
and this occurrence is returned as the response to the query. The sign of
the slope selects a rising (+) or falling (- ) edge. If no sign is specified for
the slope, it is assumed to be the rising edge.
The magnitude of occurrence defines the occurrence to be reported. For
example, +3 returns the time for the third time the waveform crosses the
midpoint threshold in the positive direction. Once this crossing is found,
the oscilloscope reports the time at that crossing in seconds, with the
trigger point (time zero) as the reference.
If the specified crossing cannot be found, the oscilloscope reports
+9.9E+37. This value is returned if the waveform does not cross the
specified vertical value, or if the waveform does not cross the specified
vertical value for the specific number of times in the direction specified.
You can make delay and phase measurements using the MEASure:TEDGe
command:
Delay = time at the nth rising or falling edge of the channel - time at
the same edge of another channel
Phase = (delay between channels / period of channel) x 360
For an example of making a delay and phase measurement, see
":MEASure:TEDGe Code" on page 467.