Option Description
Ref Waveform and All
Coherence
Display a waveform from the reference input, and coherence plots
for the other plots.
Ref Waveform and All
Cross Channel Phase
Display a waveform from the reference input, and cross channel
phase plots for the other plots.
Ref Waveform and All FRF
(Ref/Resp)
Display a waveform from the reference input, and FRF plots for the
other plots. FRF displays a spectrum representing the transfer
function of the reference input/the response input.
Ref Waveform and All FRF
(Resp/Ref)
Display a waveform from the reference input, and FRF plots for the
other plots. FRF displays a spectrum representing the transfer
function of the response input/the reference input.
Waveform - Reference Display the waveform from the reference input.
Spectrum - Reference Display the spectrum from the reference input.
Waveform - Response Display the waveform from the response input.
Spectrum - Response Display the spectrum from the response input.
Coherence Describe the degree of linear relationship between the reference
and response inputs. A coherence value close to one (1.0) at a
frequency indicates the response and reference are linearly
related, and the measurement signal to noise ratio is high.
Cross Channel Phase
(Resp/Ref)
Display the phase relationship of the response and reference
signals.
FRF (Ref/Resp) Display a spectrum representing the transfer function of the
reference input/the response input. It is the amount of force that
is required to provide a response at a given frequency.
FRF (Resp/Ref) Display a spectrum representing the transfer function of the
response input/the reference input. It is the measured ratio of
response of the structure acceleration to a known excitation.
5. Press F6 Plot Format or F12 Plot Format to set the display for multiple plots.
6.
Press Enter.
9.6 Set up the job
9.6.1 Set the measurement parameters for an ODS/Modal job
1. From the ODS/Modal main menu, press F8 Job Manager.
2.
Use the up and down arrow keys to select a job.
3. Press F4 Edit This Job > F4 Set Meas Params.
4. Set the following options as necessary.
ODS/Modal
MHM-97432 Rev 7 287
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