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3-8
Getting Started
the scan list length as the channel count is appropriate. With manual channel
spacing selected, the STEP key is used to manually control the scan.
Available channel spacing selections are summarized as follows:
TIMER – In general, a channel is scanned each time the programmed timer inter-
val expires.
GPIB – In general, each bus trigger (GET or *TRG) selects the next channel in the
scan.
MANUAL – In general, each time the STEP key is pressed the next channel in the
scan is selected.
TRIGLINK – In general, each trigger received via the Trigger Link selects the next
channel in the scan.
IMMEDIATE – Channels will continue to scan immediately and not wait for any of
the previous channel spacing events.
HOLD – Holds operation in the channel layer and prevents channels from being
scanned.
Perform the following steps to change the channel spacing:
1.
2.
3.
4.
5.
NOTE A typical method to control channel scanning is to use DELAY. A
delay can be set for each slot. This delay is invoked after each
channel of that slot is closed. By setting Channel Spacing for Im-
mediate, the scan rate will, for the most part, be controlled by the
DELAY period.
Step 2. Starting the Scan
Assuming the instrument is in the idle state (ARM indicator on VFD off), a scan
will not start until the STEP key is pressed. This takes the instrument out of the
idle state (ARM indicator on). The scan will then proceed according to how it was
programmed in Step 1.
A scan can be aborted at any time by pressing the OPEN ALL key.
Press SCAN CONFIGURATION to display the CONFIGURE SCAN menu.
Place the cursor on CHAN CONTROL and press ENTER to display the
CHANNEL CONTROL menu.
Place the cursor on CHANNEL SPACING and press ENTER to select the
SELECT CHAN SPACING menu.
Place the cursor on the desired channel spacing selection and press
ENTER. Note that selecting the TIMER will require that a time interval be
entered.
Use EXIT to back out of the menu structure.
Return to
Section 3 topics
Model 7002-HD User's Manual
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