ECLTrg0
or
1
(the VXIbus ECL trigger lines)
HOLD
(suspends sample generation)
TTLTrg0
through
7
(the VXIbus TTL trigger lines)
DDS Frequency
Generator Ranges
The
[SOURce:]FREQuency[1]:RANGe
command selects frequency doubling of
the DDS frequency generator for the SQUare, TRIangle, and RAMP functions.
This command is only used with DDS (frequency1) frequency generator.
The lower frequency setting (that is, normal setting) for the SQUare
function is determined by:
•
Reference Oscillator frequency / 16
The high frequency setting for the SQUare function is determined by:
•
Reference Oscillator frequency / 8
The lower frequency setting (that is, normal setting) for the TRIangle and
RAMP functions is determined by:
•
Reference Oscillator frequency / 4 / number of points
The doubled frequency setting for the TRIangle and RAMP functions is
determined by:
•
Reference Oscillator frequency / 2 / number of points
The doubled setting worsens the frequency resolution by a factor of two and
introduces some sample rate jitter.
Number of Points
versus Frequency
The number of points (
[SOURce:]RAMP:POINts
) determine the maximum
frequency of the TRIangle and RAMP functions. The more points results in
a lower maximum frequency, but with a better waveform shape. The fewer
points results in a higher maximum frequency, but with lower resolution.
Output Load
Comments
•
For correct output amplitude values, the load applied to the AFG
"Output 50/75
Ω
" output terminals must be the same value as the
selected AFG output impedance value.
•
To output to an open circuit, execute
OUTPut[1]:LOAD INFinity
or
9.9E+37
(this sets the auto load value off). The Agilent E1445A
then outputs the correct amplitude and offset for an open circuit. The
amplitude and offset range are doubled while resolution worsens by a
factor of 2.
Chapter 2
Generating Standard Waveforms 79
Содержание E1445A
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Страница 14: ...Notes 12 Agilent E1445A User s Manual Contents...
Страница 18: ...Notes 16 Agilent E1445A Arbitrary Function Generator User s Manual...
Страница 19: ...Notes Agilent E1445A Arbitrary Function Generator User s Manual 17...
Страница 20: ...Notes 18 Agilent E1445A Arbitrary Function Generator User s Manual...
Страница 54: ...Notes 52 Getting Started Chapter 1...
Страница 84: ...Notes 82 Generating Standard Waveforms Chapter 2...
Страница 204: ...Notes 202 Arming and Triggering Chapter 5...
Страница 432: ...Figure 9 1 E1445A Status Groups and Associated Registers 430 AFG Status Chapter 9...
Страница 446: ...Notes 444 AFG Status Chapter 9...
Страница 464: ...Notes 462 Agilent E1445A Specifications Appendix A...
Страница 534: ...Notes 532 Agilent E1445A User s Manual Index...