high)
within
5J1secs
when
ATN (attention) goes false. If
this
does
not
occur,
the
instru-
ment
is
in
its busy condition.
3.5
.
6.
Interruption
of
Readout
The Recorder
"Run"
mode can be reset via
the
Remote Local interface
function
. To
achieve
this,
the
left
-
hand
FILTER
CONTROL MODE
switch
on the
front
of
the
1617
must
be in its
"Manual"
position.
There are
two
ways
to command
the
Type
1617
to
operate
under
local
control.
1.
When
REN
(remote enable) goes false,
the
Type
1617
immediately
goes to its local
state
.
2.
When
the Type
1617
is
addressed, and receives
the
addressed
command
GTL,
it
goes
to
its local state.
While
the
MANUAL
FILTER
SELECTOR is being chosen on
the
front
panel controls,
the
Recorder
"Run"
mode
will
be reset.
When
this
interrupt
facility
is to be used,
it
may
be desirable to
manually
select an all
stop
band
e.g.
(25
kHz 1/ 1 octave),
or
an all pass band
("Linear")
.
3.6.
DIGITAL
PROGRAMMING
EXAMPLES
3.6.1.
General
Programming
34
The
following
section gives some generalized
programming
examples to
demonstrate
how
the
Type
1617
can be controlled via its
IEC
interface. Before
the
start
of
any pro-
gramming
operation, the left-hand
FILTER
CONTROL MODE
switch
should be set
to
"Manual"
position. See section 3.5.
In
the
following
example, it is assumed
that
the
listen
address is set as
on
delivery
of
the
instrument
.
To set a
control,
proceed
as
follows
:
1.
set
REN
= True
2.
set
ATN = True
3. send
unlisten,
?
4 . send listen address, 3
5. reset ATN
= False
6. send a string of characters corresponding to
the
required control
settings,
as given
in
Tables 3.2 and 3 .3.
Example:
14334
Where
14
= Band no
14
~
25
Hz (steps 1 and 2)
3
= 1 13-octave
bandwidth
. Range B (step 3)
3
= Averaging Program
Sine
,
Min
. Time 0,1 sec (step 4)
4
=
Start
record
in
1 13-octave steps (step 5)
NB
the
last character
must
be
sent
together
with
EOI.
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