Freq Ref In - Agilent Technologies X Series Manual

Input/Output
Any new point with the same frequency as an existing correction point will replace the existing point's
amplitude with that of the new point.
An Ampcor array can contain 2000 total points, maximum.
Remote Command
Example
Preset
Min
Max
Initial S/W Revision

Freq Ref In

Specifies the frequency reference as being the internal reference, external reference or sensing the
presence of an external reference.
When the frequency reference is set to internal, the internal 10 MHz reference is used even if an external
reference is connected.
When the frequency reference is set to external, the instrument will use the external reference. However,
if there is no external signal present, or it is not within the proper amplitude range, a condition error
message is generated. When the external signal becomes valid, the error is cleared.
If Sense is selected, the instrument checks whether a signal is present at the external reference connector
and will automatically switch to the external reference when a signal is detected. When no signal is
present, it automatically switches to the internal reference. No message is generated as the reference
switches between external and internal. The monitoring of the external reference occurs approximately
on 1 millisecond intervals, and never occurs in the middle of a measurement acquisition, only at the end
of the measurement (end of the request).
If for any reason the instrument's frequency reference is not able to obtain lock, Status bit 2 in the
Questionable Frequency register will be true and a condition error message is generated. When lock is
regained, Status bit 2 in the Questionable Frequency register will be cleared and the condition error will
be cleared.
If an external frequency reference is being used, you must enter the frequency of the external reference if
it is not exactly 10 MHz. The External Ref Freq key is provided for this purpose.
Key Path
452
[:SENSe]:CORRection:CSET[1]|2|3|4|5|6:DATA:MERGe
<freq>, <ampl>, ...
CORR:CSET1:DATA:MERGE 15000000,–5.0,25000000,5.0
This adds two correction points at (15 MHz, –5.0 dB) and (25 MHz, 5.0 dB) to
whatever values already exist in correction set 1.
Empty after Restore Input/Output Defaults. Survives shutdown/restart of
analyzer application (including power cycle)
Freq: 0 Hz
Amptd: –1000 dBm
Freq: 1 THz
Amptd: +1000 dBm
A.02.00
Input/Output