LCD-7400C
High Accuracy 4CH LD／PD Controller

COVER VIEW
LD/PD controller LCD-7400C is a digital LD controller of 4CH that controls up to 4 LD modules independently and can bemeasured with high accuracy.
Furthermore, LD current, PD reverse bias voltage or EA voltage of each channel executes sweep by any step width withinterlocking an external measuring instrument, and it can save measured values of current and voltage of each terminal toembedded memory.
As interface, GPIB and RS-232C is equipped and can perform various setting, monitoring of measurement value and theacquisition of sweep data by remote command.

FEATURE1.

LCD-7400C controls 4CH of LD, TEC, PD, EA (Electro-absorption modulator) independently and can be measured
each terminal of current and voltage with high accuracy.

2.

LD performs high precision control using ACC(Auto Current Control) or APC(Auto Power Control).

3.

ATC(Temperature Control) provide high stability control using PID with auto-tuning function.

4.

Each control circuit is insulated and can be equivalent to the LD module that any terminal was connected to common.

5.

GPIB and RS-232C is equipped, so performs remote control flexible.

6.

LCD-7400C can perform I-L measurement that 4CH synchronized in conjunction with the external measuring
instruments such as optical power meter speedily.

7.

Because it is compact size that is 19 inches of rack half 3U size, the system construction with space-saving ispossible.

APPLICATIONThis is the most suitable for the characteristic inspection and evaluation of the various modulation modules, for example
TOSA (Transmitter Optical Sub-Assembly), ROSA (Receiver Optical Sub-Assembly), VOA (Variable Optical Attenuator).

SPECIFICATIONS
１． ACC/APC Control Unit
Control Channel
Control Method
Control Range
Control Accuracy
Setting Ability
Control Cycle

4ｃｈ
Digital PI Control （ACC: Auto Current Control /APC: Auto Power Control）
0～300mA±100uA
10uA
50ｍsec (min)２．ATC Control Unit
Control Channel
Control Method
Applicable Temperature Sensor
Temperature Control Range
Control Accuracy
Setting Ability
Control Cycle
Auto-tuning Function

３．Driving Unit
LD Forward Current
TEC Current
EA Voltage
PD Reverse Bias Voltage

４．Measurement Unit
LD Forward Current
LD Forward Voltage
PD Current（Range1）
PD Current（Range2）
PD Current（Range3）
PD Reverse Bias Voltage
EA Current
EA Voltage
TEC Current
TEC Voltage
Thermistor Temperature
Thermistor Resistance4ｃｈ
Digital PID Control
Thermistor-15.0～+120.0℃±0.03℃ (except sensor accuracy
0.01℃
50ｍsec (min)※Changeable PID parameter※Changeable R25/B constantDriving Method
Driving Voltage Range
Sink constant current
0～5V
Bipolar constant current±5V
Bipolar constant voltage±5V
Unipolar constant voltage
0～5.9V

Driving Current Range
0～300mA±1.9A±250mA－※superimposed voltage only±Accuracy
100uA
1mV
1nA
10nA
1uA
1mV100uA
1mV
1mA
1mV
0.03℃
0.3Ω

Measurement Range Resolution Power0～310mA
1uA
0～6V
10uV
0～1.2uA
10pA
0～120uA
1nA
0～11mA10nA
0～6.5V
10uV±255mA
1uA
±6V
10uV
±2.0A
10u A
±6V
10u V
-25～125℃
0.001℃
50～400kΩ
0.01Ω

５．Display・ Setting
Display
Setting Switch

６．Behavioral Specification
Voltage・Current Measurement
Change Various Setting
Control Start/Stop
Sweep Start/Stop
Read out sweep data

6 digit 2 line segment LED
Illuminated tactile switch
Panel setting・Display Remote CommandSegment Display
RD Command
Switch setting
R/W Command
Switch setting
R/W Command
Switch setting
R/W Command－RD Command※Individual/Interlock selectable※Trigger interlock with outside measuring instrument※Maximum 7000 points x 4CH※As for the control parameter of sweep function, one of that LD forward current, PD reverse bias voltage, EA voltage or external trigger input
synchronization is selectable.
※Saved measurement data by sweep function is 9 items as LD forward current, LD forward voltage, PD current, PD reverse bias voltage, EA current,
EA voltage, TEC current, TEC voltage and temperature.

７．Interface
GPIBRS-232C

1 port IEEE488
1 port DSUB 9pin male、 cross connection※Communication speed can be switched from bps of 19.2K/38.4K/115.2K

８．Input and Output Terminal
Input and Output Of The Module
Input and Output Of PD
Input and Output Of Trigger

4 port DSUB 15pin Female
4 port Triaxial Female
2 port BNC (TTL Input/Output)

Interlock1 port DSUB 9pin Female (contact input)※Attached DSUB Shield cable x4（2m single cut）
※Attached triaxial cable x4 （2m single cut）
※Not attached BNC cable※Attached interlock release connector x1

９．Protect Function
Warning
Alarm

LD･TEC･EA Current limit、PD･EA Voltage limit※Continue the control (clip limit value)
Upper and Lower Limit Temperatures、Sensor non connection、Abnormal of Driver※Stop the control (stop only alarm factor)

１０．General Specification
Operating Temperature Range
Power Input
Dimensions

0～40℃
AC85V～250V 50/60Hz 300VA and under (Fuse T5A)
210（Ｗ）×125（Ｈ）×420（Ｄ）mm （Except Protrusion） ※19inches half rack、3U＊Specifications and design are subject to change without notice.

Manufacturer
Cell System Co., LTD
1-2-8 Azaminominami, Aoba-ku,Yokohama-shi, Kanagawa, Japan
TEL +81-45-914-4500
FAX +81-45-914-4505
URL http://www.cellsystem.co.jp/
MAIL sales@cellsystem.co.jp

Distributor

2016.06.29