DC508: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
Line 1: | Line 1: | ||
{{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:070-2460-00.pdf|DC508 Manual]] (OCR) | ||
* [[Media:070-3638-00.pdf|DC508A Manual (OCR | * [[Media:070-3638-00.pdf|DC508A Manual]] (OCR) | ||
}} | }} | ||
The DC508A version (1980) extended the frequency range to 1.3 GHz. | 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. | Both the DC508 and the DC508A use off-the-shelf divide-by-4 counter ICs as the prescaler. | ||
Line 21: | Line 21: | ||
==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] | ||
==Pictures== | ==Pictures== |
Revision as of 06:10, 27 July 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
Pictures
-
-
-
Prescaler board
-
DC508A in TM515 with other TM500 gear
-
DC508 prescaler board schematic
Custom ICs used in the DC508
No results
Custom ICs used in the DC508A
Page | Model | Part nos | Description | Designers | Used in |
---|---|---|---|---|---|
155-0119-00 | M123A | 155-0119-00 | 5-digit BCD counter and multiplexer | Dave Allstot | DC508A |