Keithley 6514

5 Coulombs Measurements
Figure 5-1 Typical connections for coulombs .......................................... 5-4
Figure 5-2 Measuring capacitors ............................................................. 5-7
6 Range, Units, Digits, Rate, and Filters
Figure 6-1 Speed vs. noise characteristics ............................................... 6-6
Figure 6-2 Digital filter types; moving and repeating .............................. 6-9
8 Buffer
Figure 8-1 Buffer locations ...................................................................... 8-3
9Triggering
Figure 9-1 Trigger model — front panel operation ................................. 9-2
Figure 9-2 Trigger model — remote operation ........................................ 9-3
Figure 9-3 Measure action block of trigger model .................................. 9-6
Figure 9-4 Trigger link connection operation ........................................ 9-11
Figure 9-5 Trigger link input pulse specifications ................................. 9-11
Figure 9-6 Trigger link output pulse specifications ............................... 9-12
Figure 9-7 DUT test system ................................................................... 9-12
Figure 9-8 Trigger link connections ....................................................... 9-13
Figure 9-9 Operation model for triggering example .............................. 9-14
10 Limit Tests
Figure 10-1 Limit tests ............................................................................. 10-2
Figure 10-2 Limit tests example .............................................................. 10-2
Figure 10-3 Operation model for limit test .............................................. 10-3
Figure 10-4 Binning system ..................................................................... 10-4
Figure 10-5 Operation model for limit testing with binning .................... 10-5
Figure 10-6 Handler interface connections .............................................. 10-6
Figure 10-7 Digital output auto-clear timing example ............................. 10-9
11 Digital I/O, Analog Outputs, and External Feedback
Figure 11-1 Digital I/O port ..................................................................... 11-2
Figure 11-2 Digital I/O port simplified schematic ................................... 11-3
Figure 11-3 Controlling externally powered relays ................................. 11-4
Figure 11-4 NAND gate control .............................................................. 11-5
Figure 11-5 Typical 2V analog output connections ................................. 11-8
Figure 11-6 Typical preamp out connections ........................................... 11-9
Figure 11-7 Electrometer input circuitry (external feedback mode) ...... 11-12
Figure 11-8 Shielded fixture construction .............................................. 11-14
Figure 11-9 “Transdiode” logarithmic current configuration ................ 11-15
Figure 11-10 Non-decade current gains ................................................... 11-16