DC501
The Tektronix DC501 is a 100 MHz frequency counter plug-in for the TM500 system.
Key Specifications
| Input frequency | 10 Hz to 100 MHz |
|---|---|
| Gate time | 10 ms to 10 s in decade steps, plus Manual (totalize count of up to 107 events) |
| Resolution | 7 digits |
| Display | 7-digit LED, overflow indicator |
| Input impedance | 1 MΩ // 20 pF, ×5/×10/×50 attenuator (front) or 50 Ω // 20 pF (rear) |
| Time base stability | ≤1×10-5; Opt. 1, ≤5×10-7 (0°C to +50°C after ½h warm-up) |
| Time base drift | ≤1×10-5; Opt. 1, ≤1×10-7 (per month) |
Options
- Option 1 – 5 MHz TCXO with 1:5 divider
- Option 2 – Automatic Gate Control and Readout Scaling Circuit (automatically selects the 0 .1-, 1-, or 10-second measurement interval to display the largest number of digits without overflow)
Rear Interface
- 28B Second decimal point (D2) output
- 27A Internal scan clock disable input
- 27B MHz light output
- 26A Reset input/output
- 25A TS0 (Time Slot Zero) output
- 25B External scan clock input
- 24B Internal scan clock (2 kHz) output
- 23B Overflow output
- 22B MSD (most significant digit)
- 20B 28 BCD output, serial by digit
- 20A 24 BCD output, serial by digit
- 21B 22 BCD output, serial by digit
- 19A 21 BCD output, serial by digit
- 19B Data Good output
- 17A Signal input ground
- 16A Signal input
Pictures
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Manual photo
