Afg Frequency Modes; Frequency Range: Sweeping And Sampling; Frequency Range: Frequency Lists And Fsk - Agilent Technologies E1445A User's Manual And Scpi Programming Manual

AFG Frequency
Modes
Frequency Range:
Sweeping and
Sampling
Frequency Range:
Frequency Lists
and FSK
Frequency Doubling
Chapter 4
through
TTLTrg0
is the source selected at power-on or following a reset,
INTernal[1]
but is specified in the programs to emphasize that sweeping,
frequency lists, and frequency-shift keying are only allowed when
is the source.
INTernal[1]
There are four frequency "modes" available using the
source (DDS timebase). The modes selected by the
[SOURce:]FREQuency[1]:MODE
CW | FIXed – single frequency mode
FSKey – frequency shift keying mode
– frequency list mode
LIST
SWEep – frequency sweep mode
The frequency range for sweeping or sampling depends on the reference
oscillator used. However, for the
the range for swept sine, square, triangle, and ramp waveforms, and the
swept sampling range for arbitrary waveforms is 0 Hz to 10.73741824 MHz.
The maximum number of frequencies in a frequency list is 256. The range
of frequencies allowed in a frequency list or for frequency-shift keying
depends on the output function:
Sine Wave and Arbitrary Waveforms: The minimum frequency is
0 Hz; the maximum frequency is the selected reference oscillator
frequency divided by 4.
Square Waves: The minimum frequency is 0 Hz; the maximum
frequency is the selected reference oscillator frequency divided by 16.
Ramp and Triangle Waveforms: The minimum frequency is 0 Hz;
the maximum frequency is the selected reference oscillator
frequency divided by four multiplied by the number of waveform
points (Rosc/(4*npts)).
For all waveforms except sine waves, the sweeping or sampling range can
be doubled using the [SOURce:]FREQuency[1]:RANGe
Frequency doubling is enabled by specifying a range that is greater
than the maximum "undoubled" frequency allowed for a given
waveform. The maximum undoubled frequencies for the various
waveforms are given below.
Arbitrary Waveforms: The maximum undoubled frequency is the
current reference oscillator frequency divided by 4.
Square Waves: The maximum undoubled frequency is the current
reference oscillator frequency divided by 16.
Sweeping and Frequency-Shift Keying
– The VXIbus TTL trigger lines.
7
command are:
INTernal1 42.94967296 MHz oscillator,
INTernal1 sample
command.
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