DC509

Manuals – Specifications – Links – Pictures

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

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

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
148-0128-00	148-0128-00	Discrete component	miniature magnetic latching relay armature	DC509 • DC5009 • SG5030
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