User`s guide

Table B-4a. SDF_DATA_HDR (Data Header record)
Field
Index
Binary
Index*
Field Name/Description
Data
Type
Range/
Units
1 1:2 recordType short 12
2 3:6 recordSize long 148 bytes
3 7:10 unique_record — byte offset from the beginning of the file
to
a record containing an instrument-specific data header.
May be ignored if recalled into a different type
instrument.
long
−1:(2
31
) 1
4 11:26 dataTitle — instrument- or user-supplied name for data type. char[16] i.d.
5 27:28 domain
−99=unknown
0=frequency
1=time
2=amplitude
3=RPM
4=order
5=channel
6=octave
short
−99, 0:6
6 29:30 dataType
−99=unknown
0=time
1=linear spectrum
2=auto-power spectrum
3=cross-power spectrum
4=frequency response
5=auto-correlation
6=cross-correlation
7=impulse response
8=ordinary coherence
9=partial coherence
10=multiple coherence
11=full octave
12=third octave
13=convolution
14=histogram
15=probability density function
16=cumulative density function,
17=power spectrum order tracking
18=composite power tracking
19=phase order tracking
20=rpm spectral
21=order ratio
22=orbit
23=HP 35650 series calibration
24=sine rms pwr data
25=sine variance data
26=sine range data
27=sine settle time data
28=sine integ time data
29=sine source data
30=sine overload data
31=sine linear data
32=synthesis
33=curve fit weighting function
34=frequency corrections (for capture)
35=all pass time data
36=norm reference data
short
−99, 0:76
Standard Data Format (SDF)
B-13