DC509

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Tektronix DC509
135 MHz programmable frequency counter
Tektronix DC509

Produced from 1981 to (?)

Manuals

Modifications

(All manuals in PDF format unless noted otherwise)
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

Links

Documents Referencing DC509

Document Class Title Authors Year Links
Tekscope 1981 V13 N1.pdf Article New Products 1981

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)

Pictures

Components

Some Parts Used in the DC509

Part Part Number(s) Class Description Used in
MOS Technology 6502 Monolithic integrated circuit 8-bit microprocessor 1220 1225 1230 DC509 DC5009 DC5010
Rockwell R6531 156-1530-00 Monolithic integrated circuit ROM-RAM-I/O-Counter (RRIOC) DC509