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4.3.2 Front panel control
Closing and opening channels
A channel is closed from the front panel by simply key-
ing in the CHANNEL assignment and then pressing
CLOSE. For example, to close channel 16 of a relay card
installed in slot 2, key in the following channel list and
press CLOSE:
SELECT CHANNELS 2!16
The above closed channel can be opened by pressing
OPEN or OPEN ALL. The OPEN key opens only the
channels specified in the channel list, and OPEN ALL
opens all channels.
The following display is an example of a channel list
that consists of several channels:
SELECT CHANNELS 2!1, 2!3, 2!12-2!15
Notice that channel entries are separated by commas
(,). A comma is inserted by pressing ENTER or the right
cursor key (
). The channel range is specified by us-
ing the hyphen (-) key to separate the range limits.
Pressing CLOSE will close all the channels specified in
the channel list. Pressing OPEN (or OPEN ALL) will
open the channels.
Scanning channels
Relay card channels are scanned by creating a scan list
and configuring the Model 7001 to perform a scan. The
scan list is created in the same manner as a channel list
(see Closing and Opening Channels). However, the
scan list is specified from the "SCAN CHANNEL" dis-
play mode. (The SCAN LIST key toggles between the
channel list and the scan list.) The following shows an
example of a scan list:
SCAN CHANNELS 2!1, 2!3, 2!11-2!15
When a scan is performed, the channels specified in the
scan list will be scanned in the order that they are pre-
sented in the scan list.
A manual scan can be performed by using the RESET
default conditions of the Model 7001. RESET is selected
from the SAVESETUP menu of the main MENU. When
RESET is performed, the mainframe is configured for
an infinite number of manual scans. The first press of
STEP takes the mainframe out of the idle state. The
next press of STEP will close the first channel specified
in the scan list. Each subsequent press of STEP will
select the next channel in the scan list.
4.3.3 IEEE-488 bus operation
Bus operation is demonstrated using HP BASIC 4.0.
The programming statements assume that the primary
address of the mainframe is 07.
Closing and opening channels
The following SCPI commands are used to close and
open channels:
:CLOSe <list>
:OPEN <list>|ALL
The following statement closes channels 1!1, and 1!3
through 1!11:
OUTPUT 707; ":clos (@ 1!1, 1!3:1!11)"
Notice that the colon (:) is used to separate the range
limits.
Either of the following statements will open channels
1!1, and 1!3 through 1!11:
OUTPUT 707; ":open (@ 1!1, 1!3:1!11)"
OUTPUT 707; ":open all"
Scanning channels
There are many commands associated with scanning.
However, it is possible to configure a scan using as lit-
tle as four commands. These commands are listed as
follows:
*RST
:TRIGger:SEQuence:COUNt:AUTO ON"
:SCAN <list>
:INIT
Operation
4-5
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