Product Manual

Arbitrary Waveform Generation
Sync Out Settings with Arbitrary Waveforms 9
9-15
Amplitude
Pressing the AMPLitude key with an arbitrary waveform selected calls the AMPLITUDE
screen.
AMPLITUDE:
+20·0 Vpp
Vpp
load:hiZ
This differs from the AMPLITUDE screen for standard waveforms in that amplitude can
now only be entered in volts peak-to-peak.
Note that the peak-to-peak amplitude set will only actually be output if the arbitrary
waveform has addresses with values which reach -2048 and +2047; if the maximum
value range is -1024 to +1023 for example then the maximum peak-to-peak voltage will
only be 10 V p-p for the instrument set to 20 V p-p.
Sync Out Settings with Arbitrary Waveforms
The default setting for sync out when arbitrary waveforms are selected is
waveform sync
; this is a pulse that starts coincident with the first point of the
waveform and is a few points wide.
If a waveform sequence has been selected then sync out defaults to sequence sync;
this is a waveform which goes low during the last cycle of the last waveform in a
sequence and is high at all other times. When sequence is used in triggered burst mode
the burst count is a count of the number of complete sequences.
Waveform Hold in Arbitrary Mode
Arbitrary waveforms can be paused and restarted by using the front panel MAN HOLD
key or by a signal applied to the rear panel HOLD IN socket.
On multi-channel instruments the channels which are to be held by the MAN HOLD key
or
HOLD IN socket must first be enabled using the ARB HOLD INPUT screen,
accessed by pressing the
HOLD key:
ARB HOLD INPUT:
status no hold
mode: disabled
Each channel is selected in turn using the channel set-up keys and set using the
mode
soft-key; the mode changes between disabled and enabled with alternate key
presses.
Pressing the front panel
MAN HOLD key stops the waveform at the current level on all
enabled channels; pressing
MAN HOLD a second time restarts the waveform from that
level. If the
ARB HOLD INPUT screen is currently selected the status field will
change from
no hold to manual hold while the waveform is paused.