BK Precision 2650 User Manual

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Case of compensation data of magnetic field strength measurement.
MFUSER“Frequency”:“Compensation coefficient”,“Frequency”:“Compensation coefficient”, ···
Example) case of PR 26M
MFUSER10M:86.7DB,100M:69.2DB,1G:50.7DB,2G:44.9DB,3G:40.1DB
* Please write unit with a capital letter.
3. After writing is completed correctly, “OK” is returned from 2650/2652/2658.
5) How to use
1. Please set the measuring function of 2650/2652/2658 to electric field strength measurement
mode or magnetic field strength measurement mode.
On the case of electric field strength measurement, please select [MEAS] → [E/F ANT],
on the case of magnetic field strength measurement, please select [MEAS] → [M/F PROBE],
Please push [F1] and display [USER] on the upper of [F1].
Now, electric field strength measurement or magnetic field strength measurement by the written
compensation data can be performed.
* When the power supply of 2650/2652/2658 is turned off at once and turned on again it
returns from electric field strength measurement mode or magnetic field strength measurement
mode to the usual measurement mode. Then if it goes into electric field measurement mode or
magnetic field strength measurement mode once again, it can measure in the same state.
6) About the antenna gain
In this contents, the antenna gain is meaning absolute gain [dBi].
When antenna gain is relative gain, it can change into absolute gain by adding +2.15dB.
· Absolute gain [dBi] = Relative gain [dBd] + 2.15dB
As reference, the conversion formula to electric field strength is using the following.
· E=√ (480π
2
× Pa ÷ (Ga × λ
2
)
E: Electric field strength [V/m]
Pa: Received electric power [W]
Ga: Antenna gain [times] = 10
(antenna gain [dBi] ÷ 10)
λ: Wavelength [m] = (3 × 10
8
) ÷ frequency [Hz]
24.6 Sample program
An example program to send following setting with RS-232C is shown below:
Setting: Center frequency 1GHz
10 ‘ ‘FREQ SETTING
20 OPEN “COM1:N81N” AS #1
30 PRINT #1 “FREQ1G”; ‘”FREQ1G” OUTPUT
40 INPUT #1 A$ ‘”OK” READ
50 CLOSE #1

BK Precision 2650 Specifications

General

Brand	BK Precision
Model	2650
Category	Measuring Instruments
Language	English