DC508A

Revision as of 05:16, 6 October 2024 by Peter (talk | contribs) (Removed redirect to DC508)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

The Tektronix DC508A is a 1.3 GHz counter plug-in for the TM500 system.

Tektronix DC508A
1.3 GHz counter
Tektronix DC508A

Produced from 1980 to 1983

Manuals
(All manuals in PDF format unless noted otherwise)

It replaced the previous DC508 version (1978), extending the frequency range to 1.3 GHz.

Key Specifications

Frequency Range 0–100 MHz direct (15 mVRMS, 1 MΩ // 25 pF), gate times 1 ms to 10 s in decade steps; 100 MHz – 1.3  GHz via prescaler (20 mVRMS, 50 Ω input, fused), gate times 8 ms to 8 s in decade steps
Resolution 9 digits
Functions Frequency, events

Options

  • Option 1 − High accuracy time base
  • Option 7 − Accepts rear panel control signals from a TR502 or SW503 to measure a marker frequency. Resolution and gating remote control circuitry is added to the DC508(A). Requires a TM503 - option 7 or an appropriately modified mainframe. This option inherently also adds option 1.

Links

Documents Referencing DC508A

Document Class Title Authors Year Links
Tekscope 1980 V12 N4.pdf Article New Products 1980
070-2088-04.pdf Book TM500 Series Rear Interface Data Book 1985

Internals

The DC508A uses an off-the-shelf divide-by-4 counter ICs as the prescaler, a Plessey SP8611B (Tek part number 156-1302-01), which is rated to 1.5 GHz.

Pictures

Better pictures needed - please contribute

Components

Some Parts Used in the DC508A

Part Part Number(s) Class Description Used in
155-0119-00 155-0119-00 Monolithic integrated circuit 5-digit BCD counter and multiplexer DC508A
2N4249 151-0342-00 Discrete component PNP Si low noise amp. DC501 DC502 DC503 DC503A DC504 DC504A DC505 DC505A DC508 DC508A DC509 DC510
2N4851 151-0504-00 151-0504-01 Discrete component silicon unijunction transistor DC501 DC502 DC503 DC503A DC504 DC505 DC505A DC508 DC508A LA501 R1330 212 214 4002A 4623 4631 4632 4633A 4634 4701 4701R 670-0696-01 670-1274-00 670-1981-00 670-1981-01 7D01 7D12 7L12
2N5060 151-0503-00 Discrete component 30 V, 0.8 A thyristor (SCR) CG551AP C50 C51 C52 C53 C70 DC505 DC505A DC508 DC508A 1240 1241 212 213 214 4014 4015 4025 4027 4105 4106 4107 4109 4111 450 4623 4631 4632 4633A 485 5D10 5223 7D10 7D11 7L12 7L13 7L14 7L18 7912AD 91HS8
Plessey SP8611B 156-1302-01 Monolithic integrated circuit 1.3 GHz divide-by-4 prescaler DC508A