DC503
The Tektronix DC503 is a 100 MHz, 7-digit frequency counter plug-in for the TM500 system.
Key Specifications
| — DC503 — | |
| Frequency Range | 0.1 Hz (AC coupled: 10 Hz) to 100 MHz |
| Impedance | 1 MΩ paralleled by approx. 20 pF |
| Sensitivity | 300 mVp-p sinewave times attenuation to 100 MHz |
| Max Input Voltage | 1× Atten: 50 V @ ≤2 kHz, derate −20 dB/decade to 10 MHz; 10 V @ 10 kHz to 25 MHz, derate −20 dB/decade to 50 MHz; 5 V @ 50 MHz to 100 MHz |
| Max Input Voltage | 10×/100× Atten: 500 V @ ≤2 MHz, derate -20 dB/decade to 100 MHz |
| — DC503A — | |
| Frequency Range | 0 Hz (AC coupled: 10 Hz) to ≥125 MHz |
| Impedance | 1 MΩ paralleled by approx. 27pF |
| Sensitivity | 20 mVRMS sinewave to 100 MHz, 35 mVRMS sinewave to 125 MHz |
| Max Input Voltage | 1× Atten: 200 Vpeak, 400 Vp-p @ DC − 50 kHz; 200 Vpeak, ≤(20/f) Vp-p @ 50 kHz − 1.33 MHz; 200 Vpeak, ≤15 Vp-p @ 1.33 – 125 MHz |
| Max Input Voltage | 5× Atten: 200 Vpeak, 400 Vp-p @ DC − 5 MHz; 200 Vpeak, ≤(2000/f) Vp-p @ 5 − 100 MHz; 200 Vpeak, ≤20 Vp-p @ 100 – 125 MHz |
Links
- Tektronix DC503A Frequency Counter OCXO Mod by NFM @ YouTube
Pictures
DC503
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DC503
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DC503
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DC503
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DC503
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DC503
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DC503
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DC503
DC503A
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DC503A
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DC503A
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DC503A left internal
