Bus Connections; Primary Address; Programming Syntax - Keithley S46 Instruction Manual

Section 3: Operation

Bus connections

Before using the S46/S46T/S46L, you must connect the IEEE-488 connector on the rear panel of
the switch to the IEEE-488 connector of the controller. Use a Keithley Instruments Model 7007 or
similar shielded IEEE-488 cable for this connection. Refer to
the IEEE-488 connection.

Primary address

The primary address of the S46/S46T/S46L must agree with the primary address you intend to
specify in the controller's programming language. There are five GPIB address DIP switches
located on the rear panel adjacent to the IEEE-488 connector. The GPIB address is set to 7 at the
factory. As shown in
NOTE
Figure 3-7
Primary address DIP switch example

Programming syntax

Syntax rules for programming the S46/S46T/S46L are described in the following paragraphs.
Commands and parameters
The general form for SCPI commands is demonstrated in
commands are hierarchical in nature and begin with a root command. For example, to open all
channels for relays 1 and 2, send the following command:
:OPEN:ALL
The root path command for the above example is
indicated by the brackets ([ ]) in the table) and need not be used.
The general form for common commands is shown in
3-2
Figure 3-7, these switches use a binary weighted configuration.
Momentarily remove power from the instrument after changing the address to
update the address to the new setting.
Binary Decimal
Weight Weight
LSB
00001 1
2
00010
4
00100
8
01000
10000 16
MSB
Note: There is no GPIB address of 31 (if
the switches are set to 31, they will
be interpreted as being set to 30).
S46/S46T/S46L Microwave Switch System Instruction Manual
Decimal
ON
Value
0
0
4
0
+
16
GPIB Address
20
Table 3-6
. This is an optional command word (as
ROUTe
Table 3-8
Document number: S46-901-01 Rev. F / March 2011
Section 2 for more information about
through Table 3-8. SCPI
and discussed later in this section.