時間量測單元 TMU

時間量測單元 TMU

TMU 是一片雙通道輸入及ARM輸入的PCI-based的時間間隔計數器(Time Interval Counter)。內部的40位元計數器可提供一系列的精密量測,包括頻率、週期、時間間隔、脈波寬度,等等。 TMU使用交互計算技術(reciprocal counting technique),此技術使低頻信號量測,能兼顧量測準確度及量測時間。器建立與產生很多多用途的波形。以下為CT-50 傑出的特點。

 

傑出特點
  • 雙通道
  • ARM輸入
  • DC~50MHz 輸入頻寬
  • Frequency,Period,Time Interval,Totalize,Ratio,Pulse width,Rise Time,Fall Time等量測功能

 

規格
  • (1) Channels A and B Input Characteristics:
  • ◎ Frequency range:
  • DC couple: DC to 50MHz
  • AC, 1M ohm: 30Hz to 50MHz AC,
  • 50 ohm: 10kHz to 50MHz
  • ◎ Signal Operating Range:+5V to -5V(x1), +50V to -50V(x10)@1M ohm
  • ◎ Damage level: +10V to -10V for Range_1 @ 1M ohm, +40V to -40V for range_2 @1M ohm , +100V to -100V for range_3 @1M ohm . 5Vrms@50 ohm
  • ◎ Coupling: AC or DC, switchable
  • ◎ Low pass filter: -3dB@140kHz (Nom.).
  • ◎ Impedance: 1M ohm /35pF (Nom.) or 50 ohm, selectable
  • ◎ Trigger (Threshold) level range:± 5.00V in 2.5mV steps
  • ◎ Attenuator:x1, or x10 (NOM), switchable.
  • ◎ Channel input: SEPARATE or COMMON, switchable
  • ◎ Arm Input:
  • Impedance: >1K ohm
  • Maximum Input Voltage: 0V to 5V
  • Signal: TTL compatible (1.4V threshold).
  • ◎ Frequency A or B:
  • Range: DC to 50MHz.
  • Gate Time: 20ns to 21990 sec
  • (2) Time Interval A-B or Time Interval B-A:
  • ◎ Range:20ns to 21990 sec
  • ◎ Delay: 20ns to 21990 sec
  • ◎ Totalize and Gated Totalize, A or B:
  • ◎ Control: Count gate can be controlled by program statement, keyboard input, or arm Input.
  • ◎ Rate : DC to 50MHz
  • ◎ Period A or B:
  • ◎ Range: See Frequency for range and gate time
  • ◎ Ratio A/B or B/A:
  • ◎ Gate Time: 100us to 40000 sec.
  • ◎ Range: DC to 50MHz.
  • Width A Range:See Time Interval,
  • Signal Slope:+ or - slope programmable on Channel A, Channel B, Arm Start, and Arm Stop.
  • Arming: Available on all modes
  • ◎ Standard:50MHz.
  • ◎ Stability: ± 50 ppm, 0℃ to 50℃
  • ◎ Optional:±1 ppm, 0℃ to 50℃

 

應用
  • Precision Test and Measurement Related