Amplitude; Sync Out Settings With Arbitrary Waveforms; Waveform Hold In Arbitrary Mode - Fluke 281 User Manual

281, 282, 284
Users Manual
Frequency or period can now only be set in terms of the clock frequency. Frequency and
period entries are made directly from the numeric keypad or by using the rotary control in
the usual way.

Amplitude

Pressing the AMPLitude key with an arbitrary waveform selected calls the AMPLITUDE
screen:
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 on this screen will only 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 output range with the instrument set
to 20 V p-p will only be 10 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 on any channel by using the front panel
MAN HOLD key or 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:
Each channel is selected in turn using the channel SETUP keys and set using the
mode soft-key; the mode changes between disabled and enabled with alternate
key presses.
9-16

AMPLITUDE:

+20·0 Vpp
Vpp
load:hiZ
ARB HOLD INPUT:
status: no hold
mode: disabled