HP E1563A, User Manual, Page: 54 / 166

54 Digitizer Command Reference
:ZERO:ALL?
CALibration:ZERO[<channel>]:ALL? [<samples>][,<rate>] initiates a zero
offset calibration for all ranges on the specified channel using an internal short. The
command returns “0” if the calibration was successful. It returns a non-zero value if
an error occurred while calibrating one of the ranges. The non-zero return value
contains the failed ranges as high bits in the lower word. For example, a return value
of 0000000000100001 has a lower word of 00100001 which indicates range 0 (bit 0
= 0.0625V) and range 5 (bit 5 = 64V) failed. The error string in SYST:ERR? contains
information about the failure on the highest range that failed (range 5, 64V). The
following steps must be completed prior to executing a zero calibration:
•
Set the CAL:STATe ON to allow calibration to occur.
•
Set the digitizer to the desired filter on the channel you want to calibrate
with the INPut[<channel>]:FILTer:FREQ <freq> and :FILTer:STATe
ON|OFF commands.
•
Errors result if the above steps are not performed before CAL:ZERO:ALL?.
Parameters
Comments
•
Optional parameters that are left blank are filled from left to right. Therefore,
it is necessary to use the syntax DEFault to note that a particular parameter is
to use the default value. For example, to specify a sample rate other than the
default, you must declare DEFault for the <readings> parameter or the <rate>
parameter value you intended will be used to fill in the <readings> parameter.
The command for channel 1 would appear as: CAL:ZERO1 DEF,.002.
•
The number of samples and the sample rate would normally be set to DEFault
values to provide averaging over an integral number of either 50 Hertz or 60
Hertz power line cycles. This allows the calibration to cancel out any noise that
is periodic with the power supply. Specifying a value other than DEF for
<samples> and/or <rate> will result in those values being used.
•
If an error occurs on any range, calibration proceeds on to the next range, and
the bad range is noted.
•
Executable when initiated: No
•
Coupled Command: No
•
Reset (*RST) Condition: None
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
samples
numeric 25 to 4000 | DEFault none
rate
numeric 1.25E-6 to reference
period * 8,388,607
| DEFault
Seconds