Keithley 2016 - Reading Hold (Autosettle); Hold Example; External Triggering; Figure 3-3 Rear Panel Pinout

Reading hold (autosettle)
When a hold reading is acquired as described in “Device actions”, an audible beep is sounded
(if enabled) and the reading is considered a “true measurement”. The reading is held on the
display until an “out of window” reading occurs to restart the hold process.
When operating remotely or scanning, the hold process seeks a new “seed” once it has been
satisfied and the reading has been released. When operating from the front panel, the hold
process does not seek a new “seed” until the held condition is removed.
Hold example
1. Enable HOLD, select a window percentage and enter a count.
2. Apply test probes to a signal. Once the signal becomes stable enough to satisfy the hold
condition, the reading is released, and the beeper sounds (if enabled).
3. Remove the hold condition by lifting the probes. Hold will then seek a new “seed”.
External triggering
The EXT TRIG key selects triggering from two external sources: trigger link and the TRIG
key. When EXT TRIG is pressed, the TRIG annunciator lights and dashes are displayed to
indicate that instrument is waiting for an external trigger. From the front panel, you can press
the TRIG key to trigger a single reading. Pressing the EXT TRIG key again toggles you back to
continuous triggers.
The Model 2016 uses two lines of the Trigger Link rear panel connector as External Trigger
(EXT TRIG) input and Voltmeter Complete (VMC) output. The EXT TRIG line allows the
Model 2016 to be triggered by other instruments. The VMC line allows the Model 2016 to
trigger other instruments.
At the factory, line 1 is configured as VMC and line 2 as EXT TRIG. (Changing this
configuration is described in the Model 2016 Service Manual.) A connector pinout is shown in
Figure 3-3.
#2
VOLT METER
COMPLETE
OUTPUT
Pin Number Description
1 Voltmeter Complete Output
2 External Trigger Input
3 no connection*
4 no connection*
5 no connection*
6 no connection*
7 Signal Ground
8 Signal Ground
* Either pin 3 or 5 may be configured as an output
instead of pin 1. Either pin 4 or 6 may be
configured as an inputinstead of pin 2. See the
Model 2016 Service Manual for details.
#1
1
2
34
5
6
7
8
EXTERNAL
TRIGGER
INPUT
F
igure 3-3
R
ear panel pinout
Measurement Options 3-11