8845A/8846A
Calibration Manual
3-32
Table 3-18. 8845A/8846A Adjustment Steps (cont)
Step Modes Value Range Input Signal Description Series
101 GIDC 10.0E-3 10.0E-3 DC 10 mA N
102 GIDC -10.0E-3 -10.0E-3 DC 10 mA N
103 GIDC 100.0E-3 100.0E-3 DC 100 mA N
104 GIDC -100.0E-3 -100.0E-3 DC 100 mA N
Ω Gain
105 GRES 100000000 100000000 R 100M Ω N
106 GRES 10000000 10000000 4W 10M Ω N
107 GRES 1000000 1000000 4W 1M Ω N
108 GRES 100000 100000 4W 100 kΩ N
109 GRES 10000 10000 4W 10 kΩ N
110 GRES 1000 1000 4W 1 kΩ N
111 GRES 100 100 4W 100 Ω N
112 GRES 10 10 4W 10 Ω (8846A only) N
Misc
Gain
113 GRES 1000000000 1000000000 R1G Ω (8846A only) N
114 GCAP1 10.0E-9 10.0E-9 C10NF (8846A only) Y
115 GCAP2 10.0E-9 10.0E-9 C10NF (8846A only) N
Once familiar with the calibration series of setups, the calibration time may be sped up by
using the command “CAL OFF”. This command allows the instrument to automatically
go to the next logical step in the series. The last column in Table 3-18 identifies which
steps in the series can be run automatically. For example, all of the Open steps can be run
by entering:
CAL:CAL ORES, 100000000
CAL? OFF
Another example is automatically running the ACV zeros from step 3 through step 12 in
Table 3-18 with:
CAL:CAL ZVAC, 100.0E-3
CAL? OFF
Notes
Using the CAL? command without an argument turns off the single step
feature.
AC linearity steps must be run with AC Gain steps to complete the AC
calibration.
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