Marconi Instruments 2955 - Page 73

Command
POm.n
ni
fm
n
n
BXn.m
READINGS
Function
Disable screen
output
Enabiescreen
output
Clear
screen
Restore
screen
OPERATION
Details
on
the
use
of
these
commands
are
given
under 'Screen
commands'
later
on in this
chapter.
Purges
output
buffer. Clears
data
available flag
but SRQ
remains
raised.
Pokes data n into location m. Note
that
this
command
inciudes
a 10
ms
delay
for
EEPROMs.
Data
cannot be poked to
the display
since
it
is not
memory mapped
(use
the
"WR
command).
Ac
for
Pn hnr
ronrinnec
crnrinc
hvtf»c tinril
R
terminator IS
received
or
a
maximum
of
64
bytes.
Note that
this
command indudes a
10 ms
delay for EEPROMs.
Tells instrument to record sequential
tone
frequencies.
Tells
instrument
to
record sequential tone
numbers
and errorst*
This
causes
the instrument to send
<EOI>
with <LF>.
This
is the
default
condition
and
will
suit most controllers.
However, care
should
be taken
when
there
are
multiple
readings in the output buffer as
data
could be
lost.
Tnis causes
the instrument
to send
<EOIxETX>
when
the
output
buffer
is
empty. <LF>
is
sent embedded
between
readings.
Enable r.f.
directional
power
head
if
fitied.
Disable
r.f.
directional
power
head.
Select peak
envelope power
for r.f.
directional
power head.
Select
power
for r.f. directional
power head.
Suppress
GPIB
annunciators
(cleared by
RS).
Put up soft key boxes
(used to arrow
the mode keys).
Where n
=
box pattern.
m=
length
of
box.
Details on
the use
of
this
command
are
found
under ’BX
(BoX) command* later on
in this
chapter.
Beep, sound a tone in the loudspeaker. Note
that
the
loudness
is
determined
by
the
VOLUME control setting.
When
next addressed to talk,
will
send a data
string
which,
when
sent
back
to the
instrument.
w-iil
restore current settings see
n<nc { I
)
under
'Command
format*.
When
addressed to talk,
will
send data
at location
m. Note
that
variable
areas
only
can be accessed.
When addressed
to talk
.
will
send
reading
or
setting
specined
in n as
ioilows:-
RF counter
frequency
RF power
.Vtodulation frequency
Modulation
level
AF counter
frequency
AF
level
RX
distortion;
SINAD;
S.N
TX distortion
Modulation peak;
-s-ve
deviation
Modulation trough:
—
ve
deviation
RF forward
power
RF reflected
power
Reading
Reading
Reading
Reading
Reading
Reading
Reading
Reading
Reading
Reading
Reading
Reading
46S81-622N
Apr.
88
3-49