DC504: Difference between revisions

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{{TM500 | mfg=Tektronix | type=DC504A | function=100 MHz frequency counter | class=counter | image=Tek dc504a.JPG | introduced=1975 | discontinued=1993 |
{{TM500 | mfg=Tektronix | type=DC504 | function=80 MHz, 5-digit frequency counter | class=counter | image=Tek dc504 on.jpg  | introduced=1975 | discontinued=1983 |
manuals=
designers= |manuals=
* [http://w140.com/smb/DC504_SM.pdf Tektronix DC504 Manual (OCR, PDF)]
* [[Media:070-1670-01.pdf|DC504 Manual]] (OCR)  
* [http://w140.com/smb/DC504A_SM.pdf Tektronix DC504A Manual (OCR, PDF)]
}}
}}
It was superseded by the [[DC504A]] in 1984.
{{BeginSpecs}}
{{Spec|Frequency Range      | DC (AC coupled: 10 Hz) to at least 80 MHz }}
{{Spec|Sensitivity          | 20 mV<sub>RMS</sub> sine wave below 15 MHz, 35 mV<sub>RMS</sub> to 50 MHz, derated down to 175 mV<sub>RMS</sub> at 80 MHz}}
{{Spec|Input impedance      | 1 MΩ // 20 pF}}
{{Spec|Trigger Level Range  | −1.5 V to +1.5 V}}
{{Spec|Frequency Resolution | kHz ranges: 0.1 Hz; 1 Hz and 10 Hz (7 digit resolution possible in overflow kHz position); MHz ranges: 100 Hz, 1 kHz (9 digit resolution possible in overflow kHz position) }}
{{Spec|Period resolution    | ms ranges: 1 µs, 10 µs; s ranges: 10 ms, 1 ms, 0.1 ms}}
{{Spec|Display Time        | Variable  ~0.1 s ... ~10 s and HOLD mode}}
{{Spec|Standard Time Base  | 1 MHz, ±1×10<sup>-5</sup> from 0°C to +50°C, ±1×10<sup>-5</sup> per month, Adjustable to within 1×10<sup>-7</sup>}}
{{Spec|Opt. 1 Time Base    | 5 MHz, ±1×10<sup>-7</sup> from 0°C to +50°C, ±1×10<sup>-7</sup> per month, Adjustable to within 1×10<sup>-9</sup>}}
{{EndSpecs}}


==Specifications==
An internal "RPM" mode switch stretches gate times sixfold, giving a longest gate time of 1 minute with a display scaled in revolutions per minute.
* 5 Digit LED Display
 
* Frequency Range
==Links==
** DC coupled: 0 Hz to at least 80 MHz
{{Documents|Link=DC504}}
** AC coupled: 10 Hz to at least 80 MHz
{{PatentLinks|DC504}}
* Sensitivity (sine wave):
 
** 20 mV RMS (56,6 mV_pp) below 15 MHz
==Rear Interface==
** 35 mV RMS (99 mV_pp) at or below 50 MHz
<small>
** 35 mV RMS @ 50 MHz derated down to 175 mV RMS (495 mV_pp) @80 MHz
{|
* Input impedance: 1 MΩ; 20 pF
|-
* Trigger Level Range: -1,5V to +1,5 V
| 28B − Gate Out, Totalize Start/Stop || 28A − Hold 
*Maximum Resolution
|-
**Frequency kHz Positions: 0,1 Hz; 1 Hz and 10 Hz (Seven digit resolution possible in overflow kHz position)
| 27B − Decimal point                ||
**Frequency MHz Positions: 100 Hz and 1 kHz (Nine digit resolution possible in overflow kHz position)
|-
**Period msec Positions: 1µs and 10 µs
|                                    || 26A − /Reset
**Period sec Positions: 10 ms; 1ms and 0,1 ms
|-
*Trigger Error: 0,5% of one cycle at min, trigger sensitivity
|                                    || 25A − TS1 (digit select 1, MSD)  
*Internal Standard Time Base (1 MHz)
|-
** Stability: 0°C to +50°C after 30 min warm up: 1E-5
| 24B − Scan clock out                || 24A − TS2 (digit select 2)
** Long Term Drift: 1E-5 per month
|-
** Accuracy: Adjustable to within 1E-7
| 23B − Overflow                      || 23A − TS3 (digit select 3)
*Internal Time Base Option 1 (5 MHz)
|-
** Stability: 0°C to +50°C after 30 min warm up: eE-7
| 22A − TS4 (digit select 4)         ||
** Long Term Drift: 1E-7 per month
|-
** Accuracy: Adjustable to within 5E-9
| 21B − BCD out 2                    || 21A − TS5 (digit select 5, LSD)
* Display Time: Variable  ~0,1 sec ... ~10 sec and HOLD mode
|-
| 20B − BCD out 8                    ||  20A − BCD out 4
|-
| 19B − Latch Out (Data Good)        ||  19A − BCD out 1
|-
|                                    ||  17A – Signal Input GND
|-
|                                    ||  16A − Signal input
|-
|                                    ||  15A – External Clock GND
|-
|                                    || 14A − External Clock (GND on 15A)
|}
</small>
 
==Internals==
The DC504 uses a [[Mostek MK5009]]P PMOS oscillator/counter IC to control gate times. 
The first counter stage is a [[Signetics 82S90]] 85(100) MHz decade counter, followed by four 7490 decade counters, 7475 latches, and 7401s to multiplex the output/display.


==Pictures==
==Pictures==
<gallery>
<gallery>
File:Tek dc504a.JPG | DC504A (intr. 1984)
Tek dc504a front.jpg|DC504A
Tek dc504 front.jpg|DC504
Tek dc504 front.jpg|DC504
Tek dc504 on.jpg|DC504
Tek dc504 on.jpg |DC504
Tek dc504 display.jpg|DC504
Tek dc504 display.jpg|DC504
Tek dc504 input.jpg|DC504
Tek dc504 input.jpg|DC504
Tek dc504 rear1.jpg|DC504
Tek dc504 rear1.jpg|DC504
Tek dc504 rear2.jpg|DC504
Tek dc504 rear2.jpg|DC504
Tek dc504a.jpg|DC504A
DC504-inside-component-side.jpg|DC504 inside; component side
DC504-inside-component-side.jpg|DC504 inside; component side
DC504-inside-copper-side.jpg|DC504 inside; copper side
DC504-inside-copper-side.jpg|DC504 inside; copper side
DC504A_Left_Internal.jpg|DC504A Internal Left Side
DC504A_Right_Internal.jpg|DC504A Internal Right Side
</gallery>
</gallery>
==Components==
{{Parts|DC504}}

Latest revision as of 05:07, 6 October 2024

Tektronix DC504
80 MHz, 5-digit frequency counter
Tektronix DC504

Produced from 1975 to 1983

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix DC504 is a 80 MHz, 5-digit frequency counter plug-in for the TM500 system.

It was superseded by the DC504A in 1984.

Key Specifications

Frequency Range DC (AC coupled: 10 Hz) to at least 80 MHz
Sensitivity 20 mVRMS sine wave below 15 MHz, 35 mVRMS to 50 MHz, derated down to 175 mVRMS at 80 MHz
Input impedance 1 MΩ // 20 pF
Trigger Level Range −1.5 V to +1.5 V
Frequency Resolution kHz ranges: 0.1 Hz; 1 Hz and 10 Hz (7 digit resolution possible in overflow kHz position); MHz ranges: 100 Hz, 1 kHz (9 digit resolution possible in overflow kHz position)
Period resolution ms ranges: 1 µs, 10 µs; s ranges: 10 ms, 1 ms, 0.1 ms
Display Time Variable ~0.1 s ... ~10 s and HOLD mode
Standard Time Base 1 MHz, ±1×10-5 from 0°C to +50°C, ±1×10-5 per month, Adjustable to within 1×10-7
Opt. 1 Time Base 5 MHz, ±1×10-7 from 0°C to +50°C, ±1×10-7 per month, Adjustable to within 1×10-9

An internal "RPM" mode switch stretches gate times sixfold, giving a longest gate time of 1 minute with a display scaled in revolutions per minute.

Links

Documents Referencing DC504

Document Class Title Authors Year Links
070-2088-00.pdf Book TM500 Series Rear Interface Data Book 1975 AF501 • AM501 • AM502 • DC501 • DC502 • DC503 • DC504 • DC505 • DC505A • DM501 • DM502 • FG501 • FG502 • FG503 • MR501 • PG501 • PG502 • PG505 • PG506 • PG508 • PS501 • PS502 • PS503 • PS503A • PS505 • RG501 • SC501 • SC502 • SG502 • SG503 • TG501
070-2088-01.pdf Book TM500 Series Rear Interface Data Book 1976 AF501 • AM501 • AM502 • AM511 • DC501 • DC502 • DC503 • DC504 • DC505 • DC505A • DD501 • DM501 • DM502 • FG501 • FG502 • FG503 • FG504 • LA501 • MR501 • PG501 • PG502 • PG505 • PG506 • PG508 • PS501 • PS502 • PS503 • PS503A • PS505 • RG501 • SC501 • SC502 • SG502 • SG503 • SG504 • SW503 • TG501 • TR501 • TR502
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

Patents that may apply to DC504

Page Title Inventors Filing date Grant date Links
Patent US 3562464A Cam actuated switch having movable and fixed contacts on circuit board Howard Vollum • Willem H Verhoef • Tony Sprando 1968-10-07 1971-02-09 Cam switches • 2101 • 2701 • 2703 • 432 • 434 • 465 • 475 • 5A15N • 5A18N • 5A20N • 5A21N • 5A38 • 5A45 • 5B10N • 5B12N • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7B10 • 7B15 • 7B50 • 7B51 • 7B52 • 7B53A • 7B50A • 7B70 • 7B71 • 7B80 • 7B85 • 7B87 • 7B92 • 7B92A • 7D01 • 7D12 • 7D15 • 7J20 • 7S12 • 7T11 • 7T11A • AF501 • AM502 • AM503 • DC502 • DC503 • DC504 • DC505 • DM501 • DM502 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • PG501 • PG502 • PG505 • PG506 • PG506A • PG508 • TG501 • SC502 • SC503 • SC504

Rear Interface

28B − Gate Out, Totalize Start/Stop 28A − Hold
27B − Decimal point
26A − /Reset
25A − TS1 (digit select 1, MSD)
24B − Scan clock out 24A − TS2 (digit select 2)
23B − Overflow 23A − TS3 (digit select 3)
22A − TS4 (digit select 4)
21B − BCD out 2 21A − TS5 (digit select 5, LSD)
20B − BCD out 8 20A − BCD out 4
19B − Latch Out (Data Good) 19A − BCD out 1
17A – Signal Input GND
16A − Signal input
15A – External Clock GND
14A − External Clock (GND on 15A)

Internals

The DC504 uses a Mostek MK5009P PMOS oscillator/counter IC to control gate times. The first counter stage is a Signetics 82S90 85(100) MHz decade counter, followed by four 7490 decade counters, 7475 latches, and 7401s to multiplex the output/display.

Pictures

  • DC504

    DC504

  • DC504

    DC504

  • DC504

    DC504

  • DC504

    DC504

  • DC504

    DC504

  • DC504

    DC504

  • DC504 inside; component side

    DC504 inside; component side

  • DC504 inside; copper side

    DC504 inside; copper side

Components

Some Parts Used in the DC504

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
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
Mostek MK5009 156-0410-00 Monolithic integrated circuit oscillator/counter DC504
Signetics 82S90 156-0482-01 Monolithic integrated circuit 85(100) MHz decade counter DC504
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