DC504: Difference between revisions

Revision as of 14:28, 24 April 2023

Tektronix DC504
80 MHz, 5-digit frequency counter Tektronix DC504 Produced from 1975 to 1983 Manuals DC504 Manual (OCR) (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It was superseded by the DC504A in 1984.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 mV_RMS sine wave below 15 MHz, 35 mV_RMS to 50 MHz, derated down to 175 mV_RMS 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.

Rear Interface

28A − Hold
28B − Gate Out, Totalize Start/Stop
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
16A − Signal input (GND on 17A)
14A − External Clock (GND on 15A)

Pictures

DC504 (1975−1983)

DC504
DC504
DC504
DC504
DC504
DC504
DC504 inside; component side
DC504 inside; copper side

DC504A (1984−1993)

DC504A
DC504A
DC504A left internal
DC504A right internal
DC504A 3/4 view

@@ Line 1: / Line 1: @@
-{{TM500 | mfg=Tektronix | type=DC504 | function=100 MHz, 5-digit frequency counter | class=counter | image=Tek dc504 on.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 |
 designers= |manuals=
 * [[Media:070-1670-01.pdf|DC504 Manual]] (OCR)
-* [[Media:070-4291-00.pdf|DC504A Manual]] (OCR)
 }}
-The DC504A successor, introduced in 1984, has 6 digits.
+It was superseded by the [[DC504A]] in 1984.
 {{BeginSpecs}}
-{{Spec|Frequency Range | 0 Hz (AC coupled: 10 Hz) to at least 80 MHz}}
+{{Spec|Frequency Range      | DC (AC coupled: 10 Hz) to at least 80 MHz }}
-{{Spec|Sensitivity (sine wave) | 20 mV<sub>RMS</sub> below 15 MHz, 35 mV<sub>RMS</sub> to 50 MHz, derated down to 175 mV<sub>RMS</sub> at 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|Input impedance      | 1 MΩ // 20 pF}}
-{{Spec|Trigger Level Range| −1.5 V to +1.5 V}}
+{{Spec|Trigger Level Range  | −1.5 V to +1.5 V}}
-{{Spec|Maximum 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|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|Maximum period resolution| ms ranges: 1 µs, 10 µs; s ranges: 10 ms, 1 ms, 0.1 ms}}
+{{Spec|Period resolution    | ms ranges: 1 µs, 10 µs; s ranges: 10 ms, 1 ms, 0.1 ms}}
-{{Spec|Trigger Error| 0.5% of one cycle at min. trigger sensitivity }}
+{{Spec|Display Time         | Variable  ~0.1 s ... ~10 s and HOLD mode}}
-{{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>}}
-{{SpecGroup|Internal Standard Time Base (1 MHz)}}
+{{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>}}
-{{Spec|Stability| 0°C to +50°C after 30 min warm up: 1×10<sup>-5</sup>}}
-{{Spec|Long Term Drift|1×10<sup>-5</sup> per month}}
-{{Spec|Accuracy|Adjustable to within 1×10<sup>-7</sup>}}
-{{SpecGroup|Internal Time Base Option 1 (5 MHz)}}
-{{Spec|Stability | 0°C to +50°C after 30 min warm up: 1×10<sup>-7</sup>}}
-{{Spec|Long Term Drift| 1×10<sup>-7</sup> per month}}
-{{Spec|Accuracy| Adjustable to within 5×10<sup>-9</sup>}}
 {{EndSpecs}}
-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.
+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.
 ==Rear Interface==
@@ Line 44: / Line 36: @@
 * 19A − BCD out 1
 * 16A − Signal input (GND on 17A)
-* 14A − External Clock
+* 14A − External Clock (GND on 15A)
 ==Pictures==