HP 54501A - Page 160

TNULI
TNULI
command/query
The
:CALIBRATE:TNULL
command
sends
the
time
null
(channel-to-channel
skew)
values into
the HP
54501A.
The
time
null
values
should
have
been obtained
from
the
instrument
during
a previous
setup.
The
TNULL
query
tells the
instrument to
output
the
tune
null
values
to
the
controller.
Command
Syntax:
:CAUbrate:TNUU
<null_value1>,<null_value2>,<null_value3>
Where:
<
null_value1
>
:
=
channel
1
to channel
2
skew
<
null_value2
>
:
=
channel
1
to
channel
3
skew
<null_value3>
:
=
channel
1
to
channel
4
skew
Example:
OUTPUT 707;":CAL:TNUL
<null_value1
>,<null_value2>,<null_value3>
Query
Syntax:
:CAUbrate:TNUU?
Returned Format: [:CAUbrate:TNUU]
<null_value1
>,<null_value2>,<null_value3>
<NL>
Where:
<null_value1
>
::
=
channel
1
to channel
2
skew
(exponential
-
NR3
format)
<null value2>
::
=
channel
1
to
channel
3
skew
(exponential
•
NR3
format)
<null_value3>
::
=
channel
1
to
channel
4
skew
(exponential
-
NR3
format)
Example:
DIM
Nii$[50]
OUTPUT
707;":CAL!BRATE:TNULL?"
ENTER
707;
Nll$
PRINT Nll$
Calibrate
Subsystem
9-2
HP
54501A
Programming