Channel Restrictions - Keithley 7001 Instruction Manual

High density switch system
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Front Panel Operation
The above arm count indicates that the scanner
will arm one time. An arm count of "0000" indi-
cates that infinite is selected.
2. To program for a different count (1 to 9999), use the
keypad to enter the count value.
3. With the desired count value displayed, press EN-
TER. The display will return to the SETUP ARM
CONTROL menu.
TRIGGER CONTROL  Use this menu item to enable or
disable the source bypass. The source bypass is used to
bypass the arm spacing event on the first pass through
the scan. With the SETUP ARM CONTROL menu dis-
played, select this menu item by placing the cursor on
TRIGGER-CONTROL and pressing ENTER. The fol-
lowing menu will be displayed:
TRIGGER CONTROL
SOURCE ACCEPTOR
Source  With this selection, the source bypass is en-
abled. The arm spacing event will be bypassed on the
first pass through the arm layer if EXTERNAL or TRIG
LINK arm spacing is selected. This will allow opera-
tion to proceed on into the scan layer without having to
wait for the programmed event.
Acceptor  With this selection, the source bypass is dis-
abled.
4.8.4

Channel restrictions

The Model 7001 can be programmed for the following
channel restrictions:
The user can enable the SINGLE CHAN (channel)
mode to prevent more than one channel from be-
ing closed at the same time.
The user can define a list of RESTRICTED CHAN-
NELS. Channels in this list cannot be closed.
Perform the following steps to display the CHANNEL
RESTRICTIONS menu:
1. Display the CONFIGURE SCAN menu (see para-
graph 4.8, General rule #1).
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2. Use the cursor keys (
on CHAN-RESTRICTIONS, and press ENTER to
access the following menu:
CHANNEL RESTRICTIONS
SINGLE-CHAN RESTRICTED-CHANNELS
SINGLE-CHAN  Use this menu item to enable or dis-
able the single channel mode. With the single channel
mode enabled (ON), only one channel can be closed.
Two or more channels cannot be closed at the same
time.
Perform the following steps to enable or disable the
single channel mode:
1. With the CHANNEL RESTRICTIONS menu dis-
played, place the cursor on SINGLE-CHAN and
press ENTER. The following message will be dis-
played:
SINGLE CHANNEL MODE
OFF ON
Cursor position indicates the current status of the
single channel mode.
2. Place the cursor on the desired state (ON or OFF)
and press ENTER. The display will return to the
CHANNEL RESTRICTIONS menu.
Operating Notes:
1. For Single Channel, when more than one channel
is assigned to a channel list, only the lowest num-
bered channel in the lowest numbered slot will
close when CLOSE is pressed. For example, as-
sume the following channel list is defined:
SELECT CHANNELS 2!1, 2!2, 1!5
When CLOSE is pressed, Channel 1!5 will close.
2. When the single channel mode is enabled, all
stored channel patterns are cleared. For example, if
closed Channels 1!1 and 1!2 are stored at memory
location #001 (M1), enabling single channel will
clear that memory location.
3. The single channel mode cannot be enabled if two
or more channels are currently closed.
and
) to place the cursor

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