TFG6800 Series Function/Arbitrary Waveform Generator Users’ Guide
Suin Instruments Co., Ltd
46
3.13.9 To recall the built-in waveforms
: If you’ve stored a built-in waveform into ‘User_Harm’,
you can recall one harmonic sequence from ‘User_Harm’ directly by pressing
〖
Recall UserHar
〗
to edit or output. Edited harmonic sequence doesn’t influence the parameters of harmonic before
editing in ‘User_Harm’.
3.13.10 Harmonic storage
: If you store the synthesis harmonic to RAM storage, it will be lost
once you quit the synthesis harmonic function. So store the harmonic sequence is required when
you want to store the current synthesized harmonic. Press
〖
Save to this file
〗
, create a document
named
Harm_seq1. Har
(there is no need to input expanded name when you create a file,
instrument will add it automatically.), and then store the harmonic sequence to it. It is a binary
system document, so you can store many such documents and recall it any time.
3.13.11 Harmonic recall
: After entering harmonic synthesis interface, if you’ve stored the
harmonic sequence document, you can find it
Harm_seq1. Har
by pressing
〖
Recall File
〗
, and then
press
〖
Options
〗〖
HarmoRecall
〗
, you can load this harmonic sequence document to
resynthesize the needed harmonic and display the graphic waveform in screen.
3.14 Frequency Sweep
3.14.1 Function Selection:
Press
【
Sweep
】
to enter the frequency sweep function, at the same
time waveform diagram of frequency sweep and it’s menu are display.
3.14.2 To set Sweep signal:
Most built - in waveforms could be used as frequency sweep, but
some are not suitable. Press
【 】
to enter sweep signal’s parameter interface to set it’s parameter.
Please note that frequency and period cannot be set. During frequency sweep process, the output
frequency varies from the start frequency to the end frequency, the phase of output signal is
continuous, the sweep could be carried out during whole frequency range.
3.14.3 Sweep Mode
:
Press
〖
Type
〗
to select Linear or Log for sweeping.
In Linear mode, frequency step is fixed. For wide sweep range, fixed step has negative influence,
which leads to high sweep resolution, slow sweep speed and precise sweeping at high frequency,
but low sweep resolution, fast sweep speed and coarse sweeping at low frequency. Therefore,
linear is much applicable for narrow sweep range.
Linear sweep is similar as FM with modulating waveform ramp, the difference between which is
