DS-2000 Frequently Asked Questions

Question number FAQ-0698

CF Standard Binary File Specification

The CF standard binary data file consists of a 512-byte condition section and a data section of arbitrary byte length.

Generally, Intel CPUs use little-endian format, while Motorola CPUs adopt big-endian format. However, CF standard binary data files are stored in big-endian format (for data compatibility with existing products such as CF-4200/CF-5200/CF-6400).

I) Condition Section

part-time job	data type
0～79	label	ASCII（80）
80～105	Memory date and time	ASCII（26）
106～115	Preparation	10Bytes
116～119	condition size	512	32-bit integer (long)
120～123	data size	Unused (0)	32-bit integer (long)
124～127	ID	0x00CF1200 (CF-1200) 0x00CF4200 (CF-4200) 0x00CF5200 (CF-5200) 0x00CF6400 (CF-6400) 0x00CF9100 (DS0921 [16bit version]) 0x00CF0922 (DS0922 [16bit version]) 0x00CF3200 (CF3200/3400) 0x00CF0321 (CF0321) 0x00CF0921 (DS0921 [32bit version])	ASCII（4）
128～131	data type	101 Time Axis Waveform (TIME1) 105 Autocorrelation Function (CORR1) 109 Cross-Correlation Function (XCOR12) 115 Impulse Response (IMP12) 121 Fourier/Power Spectrum (SPC1) 125 Cross Spectrum (XSP12) 131 Transfer Function (FRF12) 137 Coherence (COH12) 143 Coherence Output Power (COP12) 149 Histogram (HIST1) 153 Octave (OCT1) 157 Cepstrum (CEPST1) 166 Tracking (TRACK1) 170 Real-Time Octave (ROCT1)	32-bit integer (long)
132～135	Attributes of data at the time of display.	1: Real 2: Imag 3: Mag 4: Phase 10: Lifted Spectrum 103: FourieMag	32-bit integer (long)
136～139	Number of sampling points	64, 128, 256, 512, 1024, 2048, 4096 and other sample sizes	32-bit integer (long)
140～143	Number of lines for analysis		32-bit integer (long)
144～147	Types of Sample Clocks	0: Internal 1: External	32-bit integer (long)
148～151	Input channel voltage range	32-bit IEEE single precision (float)
152～155	Voltage range of the master channel	32-bit IEEE single precision (float)
156～159	Master Channel No.	Channel No. from 0	32-bit integer (long)
160～163	Mode of frequency range	0: Baseband 1: Zoom	32-bit integer (long)
164～167	number of averaging processes	32-bit integer (long)
168～171	Type of window for input channel	0:Rect 1:Hann 2:Flat 3:Force 4:Exp 5:User	32-bit integer (long)
172～175	Type of window for the Master channel	same as above	32-bit integer (long)
176～183	Analysis start frequency	Always 0 in baseband.	64-bit IEEE double precision
184～191	Analysis stop frequency (maximum order of analysis during order analysis in CF)	64-bit IEEE double precision
192～199	Value of one interval on the X-axis.	64-bit IEEE double precision
200～203	Y-axis EU value of the input channel	EU/V	32-bit IEEE single precision (float)
204～207	Y-axis EU value of Master channel	same as above	32-bit IEEE single precision (float)
208～215	Y-axis EU unit of the input channel	ASCII（8）
216～223	Master channel Y-axis EU units	ASCII（8）
224～227	X-axis EU value		32-bit IEEE single precision (float)
228～231	X-axis EU offset value		32-bit IEEE single precision (float)
232～239	X-axis EU unit		ASCII（8）
240～243	Effective start band of 1/3 octave data		32-bit integer (long)
244～247	1/3 octave data end band		32-bit integer (long)
248～251	Effective start band of 1/1 octave data		32-bit integer (long)
252～255	End band of 1/1 octave data		32-bit integer (long)
256～259	the state of the analysis interval		32-bit integer (long)
260～263	P1 RPM		32-bit IEEE single precision (float)
264～267			32-bit IEEE single precision (float)
268～271	X-axis display starting point	32-bit integer (long)
272～275	X-axis display stop point	32-bit integer (long)
276～279	Y-axis span scale	32-bit IEEE single precision (float)
280～283	Y-axis zero scale	32-bit IEEE single precision (float)
284～291	X-axis zero scale	64-bit IEEE double precision
292～299	X-axis span scale	64-bit IEEE double precision
300～303	Y-axis scale	0：LIN 1：LOG	32-bit integer (long)
304～307	X-axis scale	0：LIN 1：LOG 4：1/ 60OCT 5：1/120OCT 6：1/240OCT	32-bit integer (long)
308～311	Data Processing Information	When it comes to the frequency response function 0: H1 1: H2	32-bit integer (long)
At octave 0: OFF 1: A characteristic 2: V.v 3: V.h Impulse response normalization 0: Normalize 1: Do not normalize
312～315	Y-axis unit setting status	Bit settings 1Bit (1) : Vr 2Bit (2) : 0-p 3Bit (4) : P-P 4Bit (8) : V2 5bit (16) : PSD 6bit (32) : ESD	32-bit integer (long)
316～319	Exponential window coefficient	32-bit IEEE single precision (float)
320～321	Input channel's spectrum information of the calculus state	0:OFF 1:First derivative 2:Second derivative 3:First integral 4:Second integral ※Included in CF-5200/6400 as 1/2/4/8	16-bit integer (short)
322～323	Input channel's time axis information of the calculus state	0:OFF 1:First derivative 2:Second derivative 3:First integral 4:Second integral ※In CF-5200/6400, it is included in 4Bits information of CH1/CH2/CH3/CH4	16-bit integer (short)
324～325	Number of log sweep decades		16-bit integer (short)
326～327	Log sweep score per decade		16-bit integer (short)
328～331	Preparation	4Bytes
332～333	Master channel frequency correction information	0:OFF 1:A characteristic 2:C characteristic 4:10Hz HPF 8:100Hz HPF	16-bit integer (short)
334～335	Frequency weighting information of the input channel.	0:OFF 1:A characteristic 2:C characteristic 4:10Hz HPF 8:100Hz HPF	16-bit integer (short)
336～347	Spare (CF-5200/CF0321)	12Bytes
348～349	P2 RPM		32-bit IEEE single precision (float)
350～493	Preparation	142Bytes
494～495	Rotation 2 Input Mode ON/OFF	0:OFF 1:ON	16-bit integer (short)
496～497	schedule channel	0:P1 1:P2	16-bit integer (short)
498～499	External Sample Channel	0:P1 1:P2	16-bit integer (short)
500～503	MaxOrder	Added from DS Series Ver1.20.03.031	32-bit IEEE single precision (float)
504～507	Software Version *Added with the new type of FFT.	32-bit integer (long)
508～511	Input Channel No.	* Channel No from 0 * Added at DS0921 * Changed to long with the new FFT	32bit integer (long) '98.128 (short→long)
512～	Data Department	Data of analysis line numbers from 140 to 143.	1 Data: 32bit IEEE single precision (float)

II) Data Department

Last updated: June 20, 2005

frequency response function
time waveform system	Continuous for the number of data points
power spectrum	Continuous for the number of data points, with the overall value at the end. The value is the square of the effective value.
Fourier spectrum, cross spectrum	The real part is equal to the number of data points, and the imaginary part is continuous for the number of data points.