16
and a trigger input impedance of 50
Ω
to ground.
These trigger conditions would be appropriate
for triggering on the rising edge of an ECL logic
pulse (if it is able to drive a 50
Ω
load to
ground.)
TZ 0{,j}
Set the input impedance of the external trigger
input to 50
Ω
(j=0) or high impedance (j=
1
).
Example: the command "TZ 0,1" will set the
input impedance to 1 M
Ω
, the command "TZ
0,0" will set the input impedance to 50
Ω
.
SS
Single-Shot trigger if Trigger Mode = 2. Each
time this command is issued, a new delay cycle
will be initiated (if one is not already in
progress) provided that the single shot trigger
mode has been selected. Example: the
commands "TM 2; SS; SS; SS" will place the
instrument in the single-shot mode and trigger it
three times.
BC {i}
Burst Count of i (2 to 32766) pulses per burst.
This command is used to specify the number of
pulses, which will be in each burst of pulses
when in the burst mode. The Trigger Rate and
Burst Period commands are also used to
completely specify the burst mode of operation.
Example: the command sequence "TM 3; TR
1,1000; BC 4; BP 10" selects the burst mode,
sets the trigger rate to 1000Hz, and specifies 4
pulses per burst. Each burst is separated by 10
triggers, so that a new burst will start every
10ms.
BP {i}
Burst Period of i (4 to 32766) triggers per burst.
This command specifies the number of triggers
between the start of each burst of pulses when in
the burst mode. The burst period must always be
at least one larger than the Burst Count. Example:
the command "TM 3; TR 1,1E5; BC 100; BP 101"
sets the burst mode of operation with a trigger rate
of 100KHz. There will be 100 pulses in each burst,
one trigger will be skipped, and a new burst of
pulses will start.
STORE and RECALL COMMANDS
ST i
Store all instrument settings to location i=1 to 9.
This command allows nine complete setups to be
stored in the instrument's nonvolatile RAM. All of
the instrument's settings are stored, even those that
are not currently active: for example, the trigger
level for external triggers will be stored even though
the instrument may be operating on internal trigger.
Example: the command "ST 3" will save all the
instrument settings to the third storage location.
RC i
Recall all settings from location i=1 to 9. Default
settings may be recalled from location 0. (See the
CL command for the values of the default settings
that are recalled from location 0.) Example: the
command "RC 3" will recall all of the instrument
settings which were last stored by the ST command
to location 3. The display will show the menu item
that was active when the ST 3 command was
executed.
It is possible that the memory contents
of the stored settings were corrupted between the
time they were stored and when they were recalled.
If this happens, the message "Recall Error" will be
displayed on the LCD and bit 6 of the Error Status
byte will be set. Example: The command sequence
"RC 3; ES 6" would recall location 3 and check bit 6
of the Error Status byte. If a "1" is returned by the
"ES 6" command, then the stored values were found
to be corrupted, and so the instrument setting will
not be changed. Memory contents may be lost if the
Lithium battery is defective or if large line transients
occur.
