B&K Precision 2658A - Manual - Manual (Page 81)

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The spectrum data outputs as a numeric string separated by commas “,”. [**.**, **.**, ……, **.**]
The unit is dBm, and it is available up to two decimal places.
• Description
String Explanation Example
SPECT
The data which follows the string "SPECT" is the spectrum data.
SPECT
* *, * *, · · ·
It is the spectrum data. This string consists of all data points
separated by a comma “,” after each data value, and the string
can have a total of ten data points per line. For example,
transferring spectrum data of 1001 points require a total of 101
lines.
-102.01, -102.03, · · ·, · · ·,
-110.12,
25.8 Writing of Original Compensation Data
When antennas or probes other than the option is used in electric field strength measurement or magnetic field
strength measurement, it is necessary to write each original compensation data into the unit.
Please write the data into the unit according to the following description.
There are two methods for writing. Either use the 2650A PC Software or write a custom program using interface
commands.
1) Preparation items
* Windows PC (with USB interface) [The writing can be done with 2650A/2651 series unit only.]
* 2650A PC software (Refer to 3) below)
2) Example of writing data
As an example, the compensation data (antenna gain) of antenna M405 and the compensation data
(compensation coefficient) of magnetic field probe CP-2S are shown below.
* Compensation data (antenna gain) of antenna M405
Frequency 300MHz 350MHz 400MHz 450MHz 500MHz
Antenna gain 0.0dBi 1.0dBi 1.4dBi 1.4dBi 0.0dBi
* Compensation data (compensation coefficient) of magnetic field probe CP-2S
Frequency 10MHz 100MHz 1GHz 2GHz 3GHz
Compensation
coefficient
86.7dB 69.2dB 50.7dB 44.9dB 40.1dB
* Data of ten points or less can be written. 0Hz is not valid as a data point.
3) Using 2650A PC software for writing
1. Create the text file of compensation data.