DC509

The Tektronix DC509 is a 135 MHz programmable frequency counter plug-in for the TM500 system.

Manuals – Specifications – Links – Pictures

It is internally similar to the DC5009 to which it could be converted through an upgrade kit.

The DC509 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

Resolution	8 digits
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 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

Links

Rear interface

28B − Gate Out (TTL, active high)	27B − Arming in GND
27B	27A − Arming in (TTL, active high)
26B − Remote Start	26A − Reset in (active low)
25B
24B − Shaped Out B	Shaped Out B GND
23B − Shaped Out A GND	Shaped Out A
22B − Trig Level CH B	22A − Trig Level CH A
21B
20B
19B
18B
17B − CH B input (50 Ω, ≤10 VRMS)	17A − CH A input GND
16B − CH B input GND	16A − CH A input (50 Ω, ≤10 VRMS)
15B − 10 MHz clock out	15A − 10 MHz clock out GND
14B − Prescale; when low, counter divides readout by 16	14A − External clock Input

Firmware (uploaded BIN files)

• 160-1076-02.bin U1312 DC5009
• 160-1091-02.bin U1102 DC5009
• 160-1092-02.bin U1201 DC5009

Pictures

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  (Labels GHz, MHz, kHz, Hz have been reprinted)

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Components

Some Parts Used in the DC509

Part	Part Number(s)	Class	Description	Used in
2N4249	151-0342-00	Discrete component	PNP Si low noise amp.	DC501 • DC502 • DC503 • DC503A • DC504 • DC504A • DC505 • DC505A • DC508 • DC508A • DC509 • DC510
Rockwell R6504	156-1482-00	Monolithic integrated circuit	8-bit microprocessor	DC509 • DC5009
Rockwell R6531	156-1530-00	Monolithic integrated circuit	ROM-RAM-I/O-Counter (RRIOC)	DC509