Commands - YOKOGAWA FB200 User Manual

3.2

Commands

3-2
The FB200C/FB200L has various commands and response statuses. By setting the
measurement conditions, appropriate signals can be measured. Statuses can be
received to check the instrument's conditions.
The transmission and reception of commands and statuses are executed via the RS-422
interface.
The descriptions of the control commands and statuses are given below.
Command Name Command
Continuous BPR
measurement start
Single measurement BPM
Measurement stop STO
Set the average count AVE_nn
Query AVE?
Set the average count AVI_nne
(100 times or more)
Query AVI?
Zero calibration ZER
each range.
Set the alarm ZTH_nnn
threshold level
Set the offset OFF_nnnn
Query OFF?
Set the threshold level BTH_nnnnn,
nnnnn,nnnnn, of FBG for each optical power range.
nnnnn
Query BTH?
Control Description
Starts the measurement, repeats the measurement for the
specified average count, and outputs the center wavelength
and peak power. The operation repeats at the specified
interval. The peak power is converted to RBW 0.1 nm.
Starts the measurement, repeats the measurement for the
specified average count, and outputs the center wavelength
and peak power. The output format is the same as with the
BPR command.
If the measurement is stopped in the middle of the averaging
operation, the center wavelength and peak power are derived
from the data up to that point. Then, the center wavelength
and peak power are output, and the measurement is stopped.
nn: "01" to "99"
Returns OK:AVE_nn when the process is complete.
The default value is 1.
Returns AVE_nn or AVI_nne.
nne: "101" to "503"
3
nne="203": 20×10 = 20000 times
Each average operation takes approximately 7 seconds.
The default value is 101 (100 times).
Returns AVInne or AVE_nn.
Closes the shutter and performs zero measurement for
The response time is approximately 13 seconds.
Returns OK:ZER when the process is complete.
The dark current default is the data that was measured
before factory shipment.
Sets the threshold level for the PDA alarm.
nnn="050": 50nW
The selectable range is from 000 to 999 nW.
Returns OK:ZTH_nnn when the process is complete.
The default value is 240 nW.
Sets the wavelength compensation value.
nnnn="±012": ±0.12 nm
The selectable range is from –9.99 to +9.99 nm.
Returns OK:OFF_nnnn when the process is complete.
The default value is 0.
Returns OFF_nnnn.
Sets the threshold level for detecting the reflection spectrum
nnnnn="-2234": –22.34 dBm
Returns OK:BTH_nnnnn,nnnnn,nnnnn,nnnnn when the
process is complete.
The default values and selectable ranges are as follows:
Optical Power Default
Range Value
–5 dBm –30 dBm
–15 dBm –40 dBm
–25 dBm –50 dBm
–35 dBm –60 dBm
Returns BTH_nnnnn,nnnnn,nnnnn,nnnnn.
Selectable Range
–10.00 to –45.00 dBm
–20.00 to –55.00 dBm
–30.00 to –65.00 dBm
–40.00 to –75.00 dBm
IM 703753-01E