Chapter 2 Operating Your Frequency Counter
Using the MATH Menu Keys
Operating Guide 2-23
2
a. Press the appropriate arrow keys to set the Offset to “0.000000.”
b. Press Enter key.
NOTE BE SURE to press the Enter key to complete the numeric entry.
The offset is now set to 0.
5 Press Run key.
The rpm measurement is displayed.
Note that units indicators Hz and s do not appear when MATH is ON.
Example Procedure for Offset Function
The offset function can be used to add or subtract a fixed value from measurement
results. This can be very useful, for example, when tuning or aligning odd frequencies
of a local oscillator (LO). The target frequency can be entered as a negative offset,
then the Counter can display the differences between the LO’s frequency and the
target frequency. You can then adjust the LO until zero is displayed in the Counter’s
display.
Your task is to use the offset function to tune or align an LO to the target frequency of
222.127 MHz. Perform the following procedure to accomplish this task.
1Cycle POWER key to preset the Counter.
2 Connect the LO to channel 1, and press Freq Ch 1 key to measure the frequency
of the LO.
3 Press Scale & Offset key until SCAL: is displayed.
4 Set Scale to “1” by pressing the appropriate arrow keys to enter the value
1.000000 if Scale is not already set to “1.”
5 Press Enter key.
NOTE BE SURE to press the Enter key to complete the numeric entry.
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