User`s guide

3-22 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6
Sampling Measurements
Measurement Functions
Parameters
To set up the logarithmic sampling measurement, specify the following parameters
on MEASURE: SAMPLING SETUP screen. See Table 3-3.
Parameter Description
MODE Sampling mode. LOG10, LOG25, or LOG50.
INITIAL INTERVAL The sampling interval during logarithmic sampling.
Allowable range: 560 μs to 65.535 s.
If this value is 560 μs to 10 ms, number of measurement
data may be less than the specified number of data for top 2
decades. Then sampling continues to get all samples.
NO.OF SAMPLES Number of data to be stored by end of measurement. One
of the sampling completion conditions, so sampling stops
after this point elapses. Maximum 11 decades.
HOLD TIME Hold time. This is the time from starting source output to
first trigger. If this value is 0, first @TIME value is 0.
• Allowable range when
INITIAL INTERVAL ≥ 2 ms:
0 to 655.35 s with 100 μs resolution.
• Allowable range when
INITIAL INTERVAL < 2 ms:
− 30 ms to 655.35 s with 100 μs resolution.
Example:
HOLD TIME=1.003 s, and measurement interval is 3 ms,
decade and its range are as shown below:
MODE Number of data in 1 decade
LOG10 10
LOG25 25
LOG50 50
MODE Maximum value
LOG10 111
LOG25 276
LOG50 551
decade Range ( in sec )
1st decade 1.003 to 1.030 ( 3 m +1 to 30 m +1 )
2nd decade 1.030 to 1.300 ( 30 m +1 to 300 m +1 )
3rd decade 1.300 to 4.00 ( 300 m +1 to 3+1 )
4th decade 4 to 31 ( 3+1 to 30+1 )
5th decade 31 to 301 ( 30+1 to 300+1 )