DC5009

Manuals – Specifications – Links – Pictures

The Tektronix DC5009 is a 135 MHz programmable frequency counter plug-in for the TM5000 system. It is internally similar to the DC509 which could be converted to a 5009 through an upgrade kit.

The DC5009 uses reciprocal counting with an internal 100 MHz clock phase-locked to the reference oscillator. An R6504 microprocessor (28-pin variant of a 6502 with 8K addressable memory) performs the calculations.

Opt.01 is an OCXO for improved stability.

Key Specifications

Frequency	≤100 μHz to ≥135 MHz (Ch B in Ratio: ≥125 MHz)
Time A-B	≤15 ns to ≥3.05 hours
Single shot resolution	10 ns
Totalize	240</sup counts (1.09 × 1012)
	— Standard time base —
Frequency	10 MHz ± 1 × 10-7 at cal
Error	≤ ±5 × 10-6 from 0 °C to +50 °C
Aging	≤ ±1 × 10-6 per year
	— Opt.01 OCXO time base —
Frequency	10 MHz ± 2 × 10-8 at cal
Error	≤ ±2 × 10-7 from 0 °C to +50 °C (after oven warm-up)
Aging	≤ ±1 × 10-8 per day

Rear interface

• 14A − Ext Clock in (1, 5 or 10 MHz, ≥3 V into 1 kΩ)
• 14B − Prescale; when low, counter divides readout by 16
• 15B − 10 MHz clock out (GND return on 15A)
• 16A − CH A input (50 Ω, ≤10 V_RMS) (GND return on 17A)
• 17B − CH B input (50 Ω, ≤10 V_RMS) (GND return on 16B)
• 22A − Trig Level CH A
• 22B − Trig Level CH B
• 23A − Shaped Out A (GND return on 23B)
• 24B − Shaped Out B (GND return on 24A)
• 26A − Reset in (active low)
• 26B − Remote Start
• 27A − Arming in (TTL, active high) (GND return in 28A)
• 28B − Gate Out (TTL, active high)

Pictures

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