HP E1563A User Manual page 74

ROSCillator:EXTernal:FREQuency
Parameters
Comments
ROSCillator:EXTernal:FREQuency?
74 Digitizer Command Reference
NOTE: Use the [SENSe:]VOLTage[:DC]:RESolution?
command to obtain the resolution value.
•
Data is returned as real numbers when the data format is set to REAL (see the
FORMat[:DATA] REAL command). The data is returned in voltage units
and no scaling conversion is required as with the PACKed format.
•
Both PACKed and REAL formats return data preceded by the IEEE-488.2
definite length arbitrary block header. The header is as follows:
# <num_digits> <num_bytes>
# signifies a block transfer
<num_digits> is a single digit (1 through 9) specifying how many digits
(ASCII characters) are in the <num_bytes> descriptor which follows
<num_bytes> is the number of data bytes which immediately follow the
<num_bytes> field
[SENSe:]ROSCillator:EXTernal:FREQuency <freq> is used to specify the
externally supplied timebase frequency. This command is not required unless
ROSCillator:SOURce is EXTernal. The default timebase is the INTernal timebase.
Parameter
Name
freq
•
The frequency parameter value is used to calculate sample periods when the
sample source is set to TIMer.
•
The sample period must be at least 1.250E-6 seconds (800 kHz), and must be
an integral multiple of the timebase period (this is 1.0E-7 seconds when the
timebase source is INTernal). Period values will be rounded to the nearest
period the instrument can obtain.
•
Executable when initiated: NO
•
Coupled command: NO
•
Reset (*RST) Condition: frequency = 10.0 MHz
[SENSe:]ROSCillator:EXTernal:FREQuency? queries the external frequency.
Parameter Range of
Type
numeric 9.9E3 to 30E6
Default
Values Units
Hz