GnuPlot 기본 (2)

-. Set Axis Name (Label)
-. set xlabel 'name'
-. set ylabel 'name'
-. Example

set xlabel 'Phase'
set ylabel 'Amplitude'
plot sin(x), cos(x)

GnuPlot 기본 (1)

-. Plot 2D Plane : plot express
-. Horizontal Axis Parameter : x
-. Vertical Parameter ; y
-. Example

plot sin(x)

-. Multiple Plot : plot express1, express2, ..
-. Example

plot sin(x), cos(x)

Keithley 2281S Firmware Upgrade

-. Keithley 2281S, Precision DC Power Supplies with Battery Test and Battery Simulation Functions

Green Laser Diode Spectrum

실제 Green Laser Diode 의 Wavelength 는 532 nm 이군.

테스트는 뭐 싸구려 Green Laser Diode 에다가 암흑이 아닌 걍 사무실에서 측정하니 다른 파장대의 Peak 들이 보인다. Broad 하게... -_-
그래도 실제 Green Laser Diode 의 Wavelength 인 532 nm 가 Peak 로 잡히는구나.
Laser Diode 에 Power 도 1 Watt 가 안되게 넣고 있으니 뭐... -,.-

Photo Research, Model PR-655 Measurement

-. Photo Research, Model PR-655 Measurement Repeat Test

Voltage Pulse through Bipolar Amplifier Characteristic

-. Tabor Electronics 100 MHz Function/Arbitrary Waveform Generator (WSB102)
-. NF High Speed Bipolar Amplifier DC-2 MHz (BA4825)
-. Shows Over/Under Shoot Pulse Trail/Lead Edge Part

[Scope Shot]

Rigol DG4000 Function/Arbitrary Waveform Generator (Microsoft Windows 8)

[Auto-Detect USB Driver]

[USBTMC on NI-MAX, NI-VISA]

[Basic Query "*IDN?" on NI-VISA]

Admesy Hera, Microsoft Windows 8, NI

* Admesy Hera, Microsoft Windows 8, NI (National Instruments)

[Auto Detect Driver Setup]

[Auto Detected USBTMC Interface on NI-MAX]

[Basic Query "*IDN?", NI-VISA function on NI-MAX]

Dielectric Constant & Permitivity Measurement

Tektronix AFG3000C Arbitrary/Function Generator (Output TTL)

-. Always Output (Reference Set Frequency), 3.3V p-p Level
-. Reference CH1? CH2? Frequency

Keithley Model 2600B SYSTEM SourceMeter - Current Pulse (Not Measure)

-. Model : Keithley 2612B SYSTEM SourceMeter
-. DUT (Device Under Test) : 1Ω Resistor (10 Watt)
-. 1A, Pulse Width (500 usec), Fixed 1A Current Range & 200V Range, 100V Compliance Setup

[Keithley 7510 Fast DMM Current Measurement]

[Voltage Measurement of DUT] - Tektronix THS 3024 Oscilloscope

Transistor Characterization by Keithley 2450, 2460 Touch Screen SourceMeter

-. DUT (Device Under Test) : nMOSFET
-. Instrument : Keithley 2450, 2460 Touch Screen SourceMeter
-. Connection Diagram

-. Software : Keithley KickStart
-. Characterization : Output Familiar Curve

Simple Example Socket Code for Lua (Linux)

TIME = {}

DATA = {}

ETX_CHAR = "\r\n\r\n"

COMMAND = "*IDN?" .. ETX_CHAR

local socket = require("socket")

SMU = socket.connect("192.168.0.21", 5025)

SMU:send(COMMAND)

packet = ""

while true do

  recv  = SMU:receive(1)

  if recv == "\n" then

    break

  end

  packet = packet .. recv

end

print(packet)

COMMAND = "smua.measure.delayfactor = 0.1" .. ETX_CHAR

SMU:send(COMMAND)

COMMAND = "smua.source.output = 1" .. ETX_CHAR

SMU:send(COMMAND)

for i = 1, 100, 1 do

  t1 = socket.gettime()

  COMMAND = "print(smua.measure.i())" .. ETX_CHAR

  SMU:send(COMMAND)

  packet = ""

  while true do

    recv = SMU:receive(1)

    if recv == "\n" then

      break

    end

    packet = packet .. recv

  end

  t2 = socket.gettime()

  TIME[i] = t2 - t1

  DATA[i] = packet

end

COMMAND = "smua.source.output = 0" .. ETX_CHAR

SMU:send(COMMAND)

for i = 1, 100, 1 do

  print("TIME : " .. TIME[i] .. " , " .. "CURRENT : " .. DATA[i])

end

SMU:close()

NEWPORT Power Meter Model 1918-R on Microsoft Windows 8.

Continous Reading Test (Dark State)

NEWPORT Power Meter Model 1918-R on Microsoft Windows 8

Waveform Generator by SMU

-. Instrument : Keithley Model 26xx(A,B) SYSTEM SourceMeter
-. Waveform Source : Current or Voltage
-. Waveform Shape : Sinusoidal, Square (Pulse), Triangle
-. Frequency (Hz) : 100 Hz (Max.), 0.1 Hz (Min.)
-. Base Level Changeable

-. Test : HBLED (High Brightness LED), Current Sinusoidal Waveform Output
-. Current Waveform Capture : Keithley Model 7510 Touch Screen DMM
-. Voltage Waveform Capture : Tektronix Model THS3024 Oscilloscope

[10 Hz Current Waveform]

                                         [100 Hz Current Waveform]

Fast-Change Measurement Experiment

-. Instrument : Keithley 26xx(A,B) SYSTEM SourceMeter
-. DUT (Device Under Test) : 1.25 Ohm Resistor (2W)
-. Force the Current Source 1A -> 0A (total 10,000 Points Measurement, Voltage & Current Measurement)
-. 5,000 Points (1A), 5,000 Points (0A)

Simple Thermo-electric Material Resistance Measurement Software

* Simple Thermo-electric Material Resistance Measurement Software

-. Instrument : Keithley Model 24xx SourceMeter
-. Communication Iterface : GPIB/RS-232(c)
-. Current Source Waveform : Square
-. Frequency Control Enable (Max. 25 Hz)
-. Real Measurement (Current & Voltage)

Simple Example RS-232(c) Code for Lua (MAC)

* Simple Exmaple Code RS-232(c) for Lua (MAC)

wserial = io.open("/dev/cu.usbserial-FTGGOX8Z","w")

rserial = io.open("/dev/cu.usbserial-FTGGOX8Z","r")

rserial:setvbuf("line",100)

COMMAND = "*RST\n"

wserial:write(COMMAND)

COMMAND = "*IDN?\n"

wserial:write(COMMAND)

data = rserial:read()

print(data)

rserial:flush()

COMMAND = ":SYST:CLE\n"

wserial:write(COMMAND)

COMMAND = ":SYST:ERR?\n"

wserial:write(COMMAND)

data = rserial:read()

print(data)

rserial:flush()

COMMAND = ":SYST:ZCHK OFF\n"

wserial:write(COMMAND)

COMMAND = ":OUTP ON\n"

wserial:write(COMMAND)

for i = 1, 10 do

  COMMAND = ":READ?\n"

  wserial:write(COMMAND)

  data = rserial:read()

  print(data)

  rserial:flush()

end

rserial:close()

COMMAND = ":SYST:ZCHK ON\n"

wserial:write(COMMAND)

COMMAND = ":OUTP OFF\n"

wserial:write(COMMAND)

wserial:close()

Damped Cosine Waveform (Current Source)

-. Instrument : Keithley 2612B SYSTEM SourceMeter (Channel A)

4-Channel Voltage Pulse Synchronization

-. Instrument : Keithley 2636B SYSTEM SourceMeter (2 ea, 4-Channel)
-. TSPLINK Trigger Synchronization Method
-. Pulse Amplitude (1 V), Pulse Width (100 usec), Duty (50 %)

Rechargeable Battery Discharge/Charge Test Example

-. Included PMIC (Power Management IC) in a Battery Cell

Discharge

Charge

LD Module, Temperature Control Test

[Laser Diode Module] "ELDIS" 1606nm DFB-LD, ET361F3A3E-F

-. Pin Assignment

-. Result (Temperature Sensor : Thermistor, MicroTEC)

Temperature Control by TEC (Peltier) - Low

TEC : Thermo-electric cooling (Peltier)

Temperature Control by TEC (Peltier)

TEC : Thermo-electric cooling (Peltier)

"The Jablonsky Variations on a Theme by Hz / Cameroon Border Post"

-. Movie : Tears of the Sun (O.S.T)
-. Music by. Hans Zimmer
-. Track No. 9

내가 참 좋아하는 영화 음악가 "Hans Zimmer"
이 음악과 영화의 장면을 매칭시키면 가슴을 뛰게 만든다.

블로그 시작.

기존의 TextCube 시스템의 벡업 데이터가 있으나...
서버를 다시 셋팅하고 DNS Server 를 만드는 것이 귀찮아서...
그냥 구글 블로그를 사용하기로 결정했다.
"카카오 스토리" 를 쓰고 있으나 여러가지 제약이 많아 역시 블로그 시스템이 가장 적당한 것 같다.

토도 수학 (TODO Math) 앱.

우리 꾸러기들이 요즘 재미있게 즐겨하는 앱.
상당히 구성이 잘 되어 있는 것 같다.
지루하지 않은 반복학습 등의 효과가 매우 큰 것 같다.
어제 365일 사용 관련 유료 결재 했다는 ^^