NF FRA5087, Instruction Manual

Page: 138 / 194

6.3 File format
FRA5087 6-4
6.3.1 Format of measurement data files
One file comprises the three following parts: the header, the set parameters and the data.
There are two types of measurement data files: i.e., raw measurement data (RAW data) and
operated measurement data (OPERATED data).
RAW data are those which have been obtained through direct measurement by the FRA5087,
which may have been processed by equalizing (through menu [Measure][BASIC
FUNCTION][EQUALIZING]) and input weighting (through menu [Input][WEIGHTING
FACTOR]) functions.
Fig. 6-1 indicates resulting data from FRA5087 computations (arithmetic, differential, integral,
open and closed loop, etc.).
File head
File tail
RAW[0]
RAW[1]
RAW[n]
RAW[2]
OPRD[0]
OPRD[1]
OPRD[n]
OPRD[2]
For RAW data For OPERATED data
or
Header
Set parameters
Data
DataType=0 =1
Fig 6-1 Structure of measurement data file
The file formats of the header, the set parameters and the data are shown in Tables below.
Table 6-2 a) Measurement data file format - Header
Offset Type Descriptions (content)
0 long Offset of leading edge of the data 212
4 long (Checksum)
8 char[16] Product type (name) “NF FRA5087 ”
24(0x18) char[8] File format version “3.00 ”
32(0x20) char[8] Type of file “DATA ”