4 System
4.6 Alignments
Example
:CAL:TIME:PDEL:SOUR?
Notes The value is the elapsed time in hours since the last successful Path Delay Calibration has been
performed
Returns NaN if the Path Delay Calibration has never been performed
State Saved No
Query Temperature of Last Path Delay Calibration
Remote
Command
:CALibration:TEMPerature:PDELay:SOURce?
Example
:CAL:TEMP:PDEL:SOUR?
Notes The value is in degrees Centigrade at which the last successful Path Delay Calibration has been
performed
Returns 9.91E+37(NaN) if the Path Delay Calibration has never been performed
State Saved No
4.6.5 Timebase DAC
Lets you change the setting of the Timebase DAC from a factory calibrated setting to
your own desired setting.
The display shows the current Timebase DAC setting at the top, and gives you a
choice of CALibrated or USER setting. There is also a field for you to enter your
desired setting.
Dependencies Does not appear in VXT and M941xE
4.6.5.1 Timebase DAC
Allows control of the internal 10 MHz reference oscillator timebase. This may be
used to adjust for minor frequency alignment between your signal’s reference and
the internal frequency reference. This adjustment has no effect if the instrument is
operating with an External Frequency Reference.
If the value of the Timebase DAC changes (by switching to CALibrated from USER
with User Value set to a different value, or in USER with a new value entered) an
alignment may be necessary. The alignment system will take appropriate action;
which will either invoke an alignment or cause an Alert.
The CALibrated setting sets the Timebase DAC to the value established during
factory or field calibration. In this case the value displayed at the top of the screen is
the calibrated value.
1841 Short Range Comms & IoT Mode User's &Programmer's Reference
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