DC501

The Tektronix DC501 is a basic 100 MHz frequency counter plug-in for the TM500 system.

Manuals – Specifications – Links – Pictures

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