OPERATION
PRINTER
General
Any listen only primer may be used with
the 2y55.
A
primer
designed for
use
with
the instrument
is offered
as
an optional accessory (see
'Accessories',
Chap. 1
).
Power supplies
When operating
with
the
2955.
the printer
offered
as an optional
accessory
uses
the ACCESSORY
socket for
its power supply. For stand-alone operation, it
requires
a
supply
oC,±
12
V
at 2 A
peak.
If
any other printer
is
used it
would
normally need to
have its
own power
supply.
However,
the
ACCESSORY socket may be used (pin
2
supplies ±12
V
at
approx.
100
mA
continuous), but if
ne low amount of power supplied
must be
taken into
consideration.
GPIB cable
The
GPIB
cable
is connected
between
the
primer and
the
GPIB
interface
unit
fitted
at the
rear
of the 2955.
For
cables
with
the lEC connectors,
the IEEE to
lEC
adapters
(see
'Accessories'.
Chap.
!
)
may
be
used for conversion purposes.
Operation
For
use as a
ticketpnmer
for
printing oat measurement results
proceed as
follows:
{
1 )
Make the power supply
and
GPIB cubic
connections as
given earlier.
'
(2)
Set
T.ALK
ONL'i'
(switch
6
to 1 i
on
the 2955 GPIB
address
switch.
Set
switches
1 and
2
respectively
as foiltiws;-
(K)
—
Upper
and
lowercase,
<CR>
suppressed
01
—
Upperand lowercase.
<CR>
not suppressed
iO ~
Uppcrctisc only.
<CR>
suppressed
M
=
Upper case
only,
<CR>
not
suppressed
Note that in
TAUK
ONLY mode. itches
,5,4.5 arc
inoperative.
(,5)
Switch
the
2955 off
then
hack on
to enable the instrument
to
read the
new
switch
settings.
(4)
Press the
HOUD DISPLAY
key. HOLD
OFF is displayed
against
the
SCOPE
key
and
PRT appears
against
the
HELP ke>
.
(5)
Press
the kev
arrowed
b\' PRT.
This starts
the printer and
results in a
printout
ot
the
major
settings
and
readings
shtnvn
in
the top half of the display
(see
example
in
Fig.
,'-20}. Note
that
once
printout
has started there
is
no
way to
abort it.
(6)
M'hen
using
the
ACCESSORY
socket
tor
power,
the
screen
may be
affected
(sides
drawn
in
)
due to
power
drain, cspccialiv
w
hen
printing
rows
of
dots. This is
unimp<.irtant
and
will
not affect
measurement results since these
arc
already frozen.
3-53
46881
-622N
Apr.
88
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