DC508: Difference between revisions
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{{TM500 | mfg=Tektronix | type=DC508 | function=1 GHz counter | class=counter | image=Tek dc508 front.jpg | introduced=1978 | discontinued= | {{TM500 | mfg=Tektronix | type=DC508 | function=1 GHz counter | class=counter | image=Tek dc508 front.jpg | introduced=1978 | discontinued=1980 | designers= |manuals= | ||
* [ | * [[Media:070-2460-00.pdf|DC508 Manual]] (OCR) | ||
* [[Media:070-3638-00.pdf|DC508A Manual]] (OCR) | |||
}} | |||
The '''DC508A''' version (1980) extended the frequency range to 1.3 GHz. | |||
Both the DC508 and the DC508A use off-the-shelf divide-by-4 counter ICs as the prescaler. | |||
The DC508A | The DC508 uses a [[Motorola MC1697]] (Tek part number 156-0923-00), which is rated to 1 GHz. | ||
The DC508A uses a [[Plessey SP8611B]] (Tek part number 156-1302-01), which is rated to 1.5 GHz. | |||
==Specifications== | ==Specifications== | ||
| Line 10: | Line 14: | ||
* 100 MHz+ via prescaler (20 mV<sub>RMS</sub>, 50 Ω input, fused), gate times 8 ms to 8 s in decade steps | * 100 MHz+ via prescaler (20 mV<sub>RMS</sub>, 50 Ω input, fused), gate times 8 ms to 8 s in decade steps | ||
* Functions: Frequency, events | * 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|TM503 - option 7]] or an appropriately modified mainframe. This option inherently also adds option 1. | |||
==Links== | ==Links== | ||
* [http://www.barrytech.com/tektronix/tektm500/tekdc508.html DC508 @ barrytech.com] | * [http://www.barrytech.com/tektronix/tektm500/tekdc508.html DC508 @ barrytech.com] | ||
* [ | * [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_500/DC508.htm Tek DC508 page @ amplifier.cd] | ||
{{Documents|Link=DC508}} | |||
{{Documents|Link=DC508A}} | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek dc508 front.jpg | Tek dc508 front.jpg | ||
| Line 22: | Line 31: | ||
DC508-Prescaler.jpg | Prescaler board | DC508-Prescaler.jpg | Prescaler board | ||
Tek sw503 dc502 sg504 dc508a mr501 tm515.png|DC508A in [[TM515]] with other TM500 gear | Tek sw503 dc502 sg504 dc508a mr501 tm515.png|DC508A in [[TM515]] with other TM500 gear | ||
Tek dc508 prescaler.png|DC508 prescaler board schematic | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|DC508}} | |||
{{Parts|DC508A}} | |||
Latest revision as of 06:46, 12 October 2023
The Tektronix DC508 is a 1 GHz counter plug-in for the TM500 system.
The DC508A version (1980) extended the frequency range to 1.3 GHz.
Both the DC508 and the DC508A use off-the-shelf divide-by-4 counter ICs as the prescaler. The DC508 uses a Motorola MC1697 (Tek part number 156-0923-00), which is rated to 1 GHz. The DC508A uses a Plessey SP8611B (Tek part number 156-1302-01), which is rated to 1.5 GHz.
Specifications
- 1 GHz, 9 digits
- 0-100 MHz direct (15 mVRMS, 1 MΩ // 25 pF), gate times 1 ms to 10 s in decade steps
- 100 MHz+ via prescaler (20 mVRMS, 50 Ω input, fused), gate times 8 ms to 8 s in decade steps
- 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 DC508
| Document | Class | Title | Authors | Year | Links |
|---|---|---|---|---|---|
| Tekscope 1978 V10 N3.pdf | Article | New Products | 1978 | SC503 • DC508 • 634 |
Documents Referencing DC508A
| Document | Class | Title | Authors | Year | Links |
|---|---|---|---|---|---|
| Tekscope 1980 V12 N4.pdf | Article | New Products | 1980 | 4634 • TR503 • FG507 • DC508A • 8550 • S-3275 |
Pictures
-
-
-
Prescaler board
-
DC508A in TM515 with other TM500 gear
-
DC508 prescaler board schematic
Components
Some Parts Used in the DC508
| 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 |
| Motorola MC1697 | 156-0923-00 | Monolithic integrated circuit | 1 GHz divide-by-4 prescaler | DC508 |
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 |
| Plessey SP8611B | 156-1302-01 | Monolithic integrated circuit | 1.3 GHz divide-by-4 prescaler | DC508A |