Keithley 7001 Скачать руководство пользователя страница 86

Страница: 86 / 353

Front Panel Operation

4-37

1. With the SET TRIGGERLINK MODE menu dis-

played, place the cursor on SEMI-SYNCHRO-
NOUS and press ENTER. The following message
will be displayed:

SET SEMI-SYNC LINE
#1 #2 #3 #4 #5 #6

The position of the cursor indicates the currently
selected trigger line.

2. To select a trigger line for the Model 7001, place the

cursor on the desired line number and press EN-
TER. The instrument will return to the SET TRIG-
GERLINK MODE menu.

Immediate



With this selection, events (such as the

TIMER and EXTERNAL triggers) do not control chan-
nel spacing. Once the scan starts, the Model 7001 will
step through it as fast as the internal settling time and
user programmed delay (see paragraph 4.7) will allow.

Select immediate triggering from the SELECT CHAN
SPACING menu by placing the cursor on IMMEDIATE
and pressing ENTER. The instrument will return to the
CHANNEL CONTROL menu.

Hold



When HOLD is selected, channel spacing is

suppressed. As a result the, scan is stopped and will
not continue until HOLD is cancelled by selecting an-
other channel spacing selection. Select trigger hold
from the SET CHAN SPACING menu by placing the
cursor on HOLD and pressing ENTER. The instrument
will return to the CHANNEL CONTROL menu.

NUMBER OF CHANS



Use this menu item to define the

number of channels to be scanned. With the CHAN-
NEL CONTROL menu displayed, select this menu
item by placing the cursor on NUMBER-OF-CHANS
and pressing ENTER. The following menu will be dis-
played:

NUMBER OF CHANNELS

USE-SCANLIST-LENGTH

CHAN-COUNT

Use-scanlist-length



With this selection, the number of

channels in the scan will be determined by the number
of channels defined in the scan list. For example, if the
scan list is made up of channels 1!1, 1!2, 1!3 and 1!4, the
number of channels to be scanned will be four. Select
scan list length count from the NUMBER OF CHAN-

NELS menu by placing the cursor on USE-SCANLIST-
LENGTH and pressing ENTER. The display will return
to the CHANNEL CONTROL menu.

Chan-count



With this selection, the user determines

the number (count) of channels to scan. The user pro-
grammed count can be smaller, equal to, or larger than
the number of channels in the scan list. For example, if
the scan list is made up of four channels (1!1, 1!2, 1!3
and 1!4), the user can program a count of 12. With this
count value, the instrument will repeat the channel
scan three times. An advantage of repeating channels
(rather than scans) is that delays in the scan layer of op-
eration (SCAN CONTROL) are avoided. The channel
spacing delay between all 12 channels are the same.

Select CHAN-COUNT from the NUMBER OF CHAN-
NELS menu by placing the cursor on CHAN-COUNT
and pressing ENTER. The following menu will be dis-
played:

CHANNEL COUNT

INFINITE

ENTER-CHAN-COUNT

INFINITE



Use this selection to continuously repeat the

scan. With the CHANNEL COUNT menu displayed,
select this menu item by placing the cursor on INFI-
NITE and pressing ENTER. The display will return to
the CHANNEL CONTROL menu.

ENTER-CHAN-COUNT



Use this selection to define the

number of channels in the scan. Perform the following
steps to define a finite count:

1. With the CHANNEL COUNT menu displayed,

place the cursor on ENTER-CHAN-COUNT and
press ENTER. A message indicating the current
count will be displayed.

CHANNEL COUNT = 0010

The above message indicates that the current count
is set to 10.

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 CHANNEL
CONTROL menu.