DC508: Difference between revisions

Latest revision as of 06:15, 6 October 2024

Tektronix DC508
1 GHz counter Tektronix DC508 Produced from 1978 to 1980 Manuals DC508 Manual (OCR) (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

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.

Key Specifications

Frequency Range	0–100 MHz direct (15 mV_RMS, 1 MΩ // 25 pF), gate times 1 ms to 10 s in decade steps; 100 MHz – 1 GHz via prescaler (20 mV_RMS, 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

Tek DC508 page @ amplifier.cd

Documents Referencing DC508

Document	Class	Title	Authors	Year	Links
Tekscope 1978 V10 N3.pdf	Article	New Products		1978	SC503 • DC508 • 634
070-2088-04.pdf	Book	TM500 Series Rear Interface Data Book		1985	AA501 • AF501 • AM501 • AM502 • AM503 • AM511 • DC501 • DC502 • DC503 • DC503A • DC504 • DC505 • DC505A • DC508 • DC508A • DC509 • DC510 • DC5009 • DC5010 • DD501 • DL502 • DM501 • DM501A • DM502 • DM502A • DM505 • DM5010 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • FG5010 • LA501 • LA501W • WR501 • MR501 • PG501 • PG502 • PG505 • PG506 • PG507 • PG508 • PS501 • PS502 • PS503 • PS503A • PS505 • PS5010 • RG501 • SC501 • SC502 • SC503 • SC504 • SG502 • SG503 • SG504 • SG505 • SW503 • TG501 • TR501 • TR502 • MI5010 • MX5010 • SI5010

Internals

The DC508 uses an off-the-shelf divide-by-4 counter ICs as the prescaler, a Motorola MC1697 (Tek part number 156-0923-00), which is rated to 1 GHz.

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

@@ Line 1: / Line 1: @@
 {{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.
+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.
+{{BeginSpecs}}
-The DC508 uses a [[Motorola MC1697]] (Tek part number 156-0923-00), which is rated to 1 GHz.
+{{Spec | Frequency Range | 0–100 MHz direct (15 mV<sub>RMS</sub>, 1 MΩ // 25 pF), gate times 1 ms to 10 s in decade steps; 100 MHz – 1 GHz via prescaler (20 mV<sub>RMS</sub>, 50 Ω input, fused), gate times 8 ms to 8 s in decade steps }}
-The DC508A uses a [[Plessey SP8611B]] (Tek part number 156-1302-01), which is rated to 1.5 GHz.
+{{Spec | Resolution | 9 digits }}
+{{Spec | Functions | Frequency, events }}
-==Specifications==
+{{EndSpecs}}
-* 1 GHz, 9 digits
-* 0-100 MHz direct (15 mV<sub>RMS</sub>, 1 MΩ // 25 pF), gate times 1 ms to 10 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
 ===Options===
@@ Line 20: / Line 15: @@
 ==Links==
-* [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}}
+{{PatentLinks|DC508}}
+==Internals==
+The DC508 uses an off-the-shelf divide-by-4 counter ICs as the prescaler, a [[Motorola MC1697]] (Tek part number 156-0923-00), which is rated to 1 GHz.
 ==Pictures==
@@ Line 36: / Line 33: @@
 ==Components==
 {{Parts|DC508}}
-{{Parts|DC508A}}