SYNC Output
SYNC OUT is a multifunction CMOS/TTL level output that can be automatically or manually set to
be any of the following:
•
Waveform Sync
:
A square wave with 50% duty cycle at the main waveform
frequency, or a pulse coincident with the first few points of an
arbitrary waveform. Can be selected for all waveforms.
•
Position Marker
:
Can be selected for arbitrary waveforms only. Any point(s) on the
main waveform may have associated marker bit(s) set high or low.
•
Burst Done
:
Produces a pulse coincident with the last cycle of the burst.
•
Sequence Sync
:
Produces a pulse coincident with the end of a waveform sequence.
•
Trigger
:
Selects the current trigger signal (internal, external or manual).
Useful for synchronising burst or gated signals.
•
Sweep Sync
:
Outputs the sweep trigger signal.
•
Phase Lock
:
Used to lock two or more generators. Produces a positive edge at
the 0º phase point.
The setting up of the signals themselves is discussed in the relevant sections later in this manual,
e.g.
Trigger
is described in the Triggered Burst/Gate section and
Position Marker
under
the Arbitrary Waveform Generation.
Pressing the key above the SYNC OUT socket calls the
SYNC OUTPUT SETUP
screen.
SYNC OUTPUT SETUP
output: on
◊
mode: auto
src: waveform sync
SYNC OUT is turned on and off by alternate presses of the
output
soft-key.
The selection of the signal to be output from the SYNC OUT socket is made using the
src
(source) soft-key; repeated presses of
src
cycle the selection through all the choices
(
waveform sync
,
position marker
, etc.) listed above. Alternatively, with the
src
selected (double-headed arrow) the rotary control or cursor keys can be used to step backwards
and forwards through the choices.
The source selection of the SYNC OUT waveform can be made automatic (
auto
) or user-
defined (
manual
) with alternate presses of the
mode
soft-key. In automatic mode the SYNC
OUT waveform most appropriate for the current main waveform is selected.
For example,
waveform sync
is automatically selected for all continuous standard and
arbitrary waveforms, but
trigger
is selected in trigger or gated waveform modes. The
automatic selection will be mentioned in each of the appropriate main waveform mode sections
and a full table is given in Appendix 2.
The automatic selection can still be changed manually by the
src
soft-key even when
auto
mode has been selected but the selection will immediately revert to the automatic choice as soon
as any relevant parameter (e.g. main waveform frequency or amplitude) is adjusted.
Manual
must be selected by the
mode
soft-key for a source other than the automatic choice to remain
set. The
auto
selection will generally set the most frequently used signal, e.g.
waveform
sync
for all continuous main waveforms, but
manual
will need to be used for special
requirements, e.g. position markers on arbitrary waveforms.
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