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Parameters
Comments
52 Digitizer Command Reference
being output onto the calibration bus.
Parameter
Name
voltage
The maximum voltage from an external source used to calibrate the 16V range is
15.68V or 98% of full scale. The maximum voltage attainable from the E1564A
internal DAC is 15V. See the following paragraphs.
HP E1564A 4-Channel Digitizer Internal DAC
The internal DAC on the HP E1564A can be used for the calibration source when
CAL:SOURce INTernal is specified. The output level of this DAC is specified with
the CAL:DAC:VOLTage command. The actual output level must be measured with
a voltmeter by the person doing the calibration and that measured value is the input
for the <voltage> parameter of this CAL:VALue command. The voltage can be
measured across pins 5 (high) and 9 (low) of the D-subminiature calibration bus
connector.
The maximum output levels are limited to the levels shown in the table below. These
are the HP E1564A DAC voltages recommended for calibrating each range. The
values are approximately 98% of full scale (except for the 16V range which the
internal E1564A's DAC has a maximum output of ±15V.
Voltage
Range
0.0625
0.2500
1.0000
4.0000
16.0000
64.0000
256.0000
•
Executable when initiated: No
•
Coupled Command: No
•
Reset (*RST) Condition: All channels set to 0.0 volts
Parameter
Range of
Type
numeric
±0.061256409 -
Max DC
Voltage
(absolute
value)
0.061256409
0.245025635
0.980102539
3.920410156
15.00
not used
not used
Default
Values
Units
±15.6800
volts
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