2
Operating Your Instrument
90
Keysight 53147A/148A/149A Operating and Programming Guide
Offsetting a Frequency Measurement
You can use the Frequency Offset (
Freq Offset
) function to add or subtract a
constant value to/from a frequency measurement. For example, you can use an
offset to compensate for a systematic error or to display the difference in
frequency between two signals.
To display an offset frequency measurement, you need to set the value and sign
(
+/–
) of the offset and to turn the Frequency Offset function on.
Frequency Offset Example
1 Connect a cable from the 10 MHz reference output on the back panel to the
Channel 1 input connector, and press the Chan Select key (if necessary) to
activate Channel 1.
The display should look like this:
2 Press the Shift key, and then press the Freq Offset (Resol) key in the MODIFY
section of the front panel.
The
Shift
annunciator activates when you press the
Shift
key. When you press
the
Freq Offset
key, the
Shift
annunciator disappears, and the
Freq Offset
annunciator at the left side of the display activates.
3 Use the left- and right-arrow keys to move the focus to the digit(s) in the
frequency-offset display that you need to adjust to enter the offset value,
and then use the up- and down-arrow keys to adjust the value for each
digit. Enter a value of 500 Hz.
The flashing digit is the digit that currently has the focus. This means that you
can change the value of the flashing digit using the up- and down-arrow keys.
GHz
MHz
kHz
Hz
Ch 1
Rel
Freq
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