7-14 Triggering Model 6487 Reference Manual
The trigger link connections for this test system are shown in Figure 7-8. The trigger link
of the Model 6487 is connected to the trigger link (IN or OUT) of the switching main-
frame. Note that with the default trigger settings of the switching mainframe, line #1 is an
input and line #2 is an output.
Figure 7-8
Trigger link connections
For this example, the Model 6487 and switching mainframe are configured as follows:
To store readings in the Model 6487 buffer, first set the number of points to store in the
buffer:
1. Press CONFIG and then STORE.
2. Set the buffer size to 10 using the RANGE and cursor keys.
3. Press ENTER.
4. The next time STORE is pressed, the asterisk (*) annunciator turns on to indicate
the buffer is enabled. (See the Model 6487 User’s Manual for buffer details.)
To start the test, press STEP on the switching mainframe to take it out of idle and start the
scan. The switching mainframes output pulse triggers the Model 6487 to take a reading
and store it. the Model 6487 then sends an output trigger pulse to the switching mainframe
to close the next channel. This process continues until all 10 channels are scanned, mea-
sured, and stored.
Model 6487 Switching Mainframe
Factory Defaults Restored Factory Defaults Restored
Trig-In Event = TLink Scan List = 1!1-1!10
Trigger Input Line = #2 Number of Scans = 1
Trigger Output Line = #1 Channel Spacing = TrigLink
Trigger Output Event = ON
Trigger Count = 10
Trigger Delay = Auto
MADE IN USA
7001 or 7002 Switch System
Model 6487 Picoammeter
OUT
IN
Trigger
Link
120
LINE RATING
50, 60Hz
50 VA MAX
INPUT
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
IEEE-488
CAT I
TRIGGER LINK
RS-232
MADE IN
U.S .A .
ANALOG OUT
DIGITAL I/O
505V
MAX
V-SOURCE OUTPUT
505V PK TO CHASSIS
LO HI
INTERLOCK
!
!
FUSE LINE
400mAT
(SB)
100 VAC
120 VAC
200mAT
(SB)
220 VAC
240 VAC
505V PK
505V PK
505V PK
Trigger
Link
Trigger Link Cable
(8501)
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