Tektronix 2221 - Page 82

1
Options
and
Accessories
-
2221
Operators
AUXILIARY
Connector -
Provides
connections for an X - Y
Plotter
and
an
External Clock
input ( see
Controls
,
Con
nectors , and
indicators ) .
Table
7-6
GPIB
PARAMETERS
Switch
Switch
Section
Switch
Position
Function
1
GPIB
Connector -
Provides the ANSI / IEEE
Std
488-1978
compatible electrical and mechanical connection to the
GPIB
.
The
connector is
only on
instruments with
Option
10. The
function of each
pin of the
connector is
shown
in
Table 7-5 .
1
Address
selection
Binary weight
1
2
1
Address selection
Binary weight = 2
บ
GPIB
PARAMETERS
Switch -
Allows
the
selection of
setup
options for the GPIB
interface
. The
switch is
read
at
power
-
up
and
when
interface
clear
messages are
received .
Five
sections of
the
switch
select
the
GPIB
address ,
one
selects
the
terminator
,
two
select
talk
/
listen
modes ,
and
two
are
used for
printer /
plotter
selection .
The function of
each
switch
section is
shown
in
Table 7-6 .
Address selection
Binary
weight
= 4
บ
1
4
1
Address
selection
Binary weight = 8
5
Table
7-5
GPIB
Connector
Address
selection
Binary
weight =
16
.
1
6
Pin
Line Name
Description
1
Terminator
selection
EOI
LF or EOI
1
7
DIO1
DIO2
DIO3
DIO4
EOI
IEEE - 488
Data 1/0
IEEE
-
488
Data I / O
IEEE - 488 Data
I / O
IEEE
-
488
Data I / O
IEEE -
488
END or
Identify
2
3
4
5
1
No
function
LON (
Listen
only )
بال
8
No
function
TON (
Talk
only
)
1
9
6
7
8
9
10
DAV
NRFD
NDAC
IFC
SRQ
Printer / plotter selectiona
Printer
/
plotter selectiona
10
U
IEEE - 488 Handshake
IEEE - 488 Handshake
IEEE - 488 Handshake
IEEE -
488
Input
IEEE -
488
Output
IEEE
-
488
Input
System Ground
( Chassis )
IEEE - 488
Data I / O
IEEE
-
488
Data I / O
IEEE - 488
Data I / O
11
2345678
ATN
SHIELD
D105
DIO6
DIO7
aSwitches 9
and 10
select
printer /
plotter
devices at
power
-
up .
The
devices
may be
changed
after
power - up
using
Option
commands , or in the case of the 2230 , the MENU controls . Two
EPSONO
formats
are
selectable .
EPS7
uses
seven
print
wires
per head
pass , and is
usually
slower
. It is
the chr $ ( 27
) " L "
mode
.
EPS8
uses
eight print
wires per
head
pass , and
is
usu
ally the
faster
print
- head
speed
. It is
the chr $ (
27 ) “ Y ”
mode
. In
this
mode
,
most
Epson
and
Epson
-
compatible
printers will not
strike any
print wire
more often
than every
second
pixel .
EPS8
is
selected
when
parity
is
disabled .
บ
DIO8
REN
GND
GND
GND
Printing
/
plotting
devices
are
selected with the
following
switch
positions :
Switch
9
Switch 10
Device Selected
19
20
IEEE - 488
Data 1/0
IEEE -
488
Input
Digital Ground ( DAV )
Digital Ground ( NRFD )
Digital Ground ( NDAC )
Digital Ground ( IFC )
Digital
Ground
( SRQ )
Digital
Ground
( ATN )
Digital
Ground
(
LOGIC
)
21
1
1
GND
GND
GND
GND
1
1
HP -
GL
plotter
Epson EPS7 or EPS8
Thinkjet
printer
X - Y
Plotter
22
23
24
HP - GLO
and
ThinkJet are
trademarks of
Hewlett -
Packard
Com
pany .
Epson
is a
trademark
of
Epson Corporation .
7-6
บ