User`s guide

Table B-3b. SDF_MEAS_HDR (Measurement Header record)
Field
Index
Binary
Index*
Field Name/Description
Data
Type
Range/
Units
15 103:110 centerFreq — center frequency double unit is Hz
range is i.d.
16 111:118 spanFreq — frequency span double unit is Hz
range is i.d.
17 119:126 sweepFreq — current frequency for a swept measurement double unit is Hz
range is i.d.
18 127:128 measType — measurement type
−99 = unknown measurement
0 = spectrum measurement
1 = network measurement
2 = swept measurement
3 = FFT measurement
4 = orders measurement
5 = octave measurement
6 = capture measurement
7 = correlation measurement
8 = histogram measurement
9 = swept network measurement
10 = FFT network measurement
short
−99:10
19 129:130 realTime — whether the measurement was continuous in
time
0 = not continuous
1 = continuous
short 0:1
20 131:132 detection — detection type
−99 = unknown detection type
0 = sample detection
1 = positive peak detection
2 = negative peak detection
3 = rose-and-fell detection
short
−99:3
21 133:140 sweepTime — actual time for a swept measurement double unit is sec
range is i.d.
22 141:144 startFreqIndex — the first alias-protected point on a
frequency-domain trace. This field is only valid for FFT
measurements, long
long 0:last_valid_index
(SDF_DATA_HDR
)
23 145:148
stopFreqIndex — the last alias-protected point on a
frequency-domain trace. This field is only valid for FFT
measurements, long
long 0:last_valid_index
(SDF_DATA_HDR
)
24 149:156 expAverageNum — number of exponential averages. double range is i.d.
* Bytes i.d. = instrument-dependent
Standard Data Format (SDF)
B-12