Description Of Triggering In The Hp 8360 L-Series Swept Cw Generators - HP 8360 L Series User Manual

Description of
Triggering in the
HP 8360 L-Series Swept
CW Generators
The HP 8360 L-Series Swept CW Generators follow the SCPI model
of triggering. It is a layered model with the structure shown in
Figure l-42.
(Frequency, Power,
Stepped, List, or Analog)
Figure l-42. HP 8360 Simplified Trigger Model
The process of sweeping involves all 3 of these states. The IDLE
state is where the sweep begins. The IDLE state is left when
the sweep is initiated. This can happen on a continuous basis
( INIT : CONT ) or on a demand basis (INIT : CONT OFF). The
ON
functions of continuous and single sweeps are handled by this
command. When the 1NIT:CONT ON command is given, the sweep
is continuously re-initiated. When in the OFF state, the sweep is
initiated with the INIT: IMMediate command.
wait for trigger
Once initiated, the
signal selected by the TRIG:SOURce command is examined until a
TRUE condition is detected. These trigger signals are:
This signal is always TRUE.
This is the external trigger input jack. A positive
transition on this jack constitutes a TRUE signal.
This signal is the HP-IB <get> (Group Execute
BUS
Trigger) message or a *TRG command.
When a TRUE signal is found, the sweep is actually started.
The act of producing the sweep in some cases involves the use
of trigger signals. For example, the stepped and list sweeps
have modes that allow triggering for point-to-point advancement
through the sweep. These trigger signals are selected by individual
TRIG: SOURce commands in the appropriate subsystems (i.e.
LIST:TRIGger:SOURce and SWEep:TRIGger:SOURce). The
definition of these signals in the swept CW generator cause the sweep
Idle State
Sweep Initiated
Waiting for the
Trigger Signal
t o b e T r u e
Sweep Started
Sweep State
Perform a Sweep
state is entered. Here, the trigger
Getting Started Programming
l-l 17