DC501
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The Tektronix DC501 is a basic 100 MHz frequency counter plug-in for the TM500 system.
Key Specifications
Input frequency | 10 Hz to 100 MHz |
---|---|
Gate time | 10 ms to 10 s in decade steps, plus Manual (totalize count of up to 107 events) |
Resolution | 7 digits |
Display | 7-digit LED, overflow indicator |
Input impedance | 1 MΩ // 20 pF, ×5/×10/×50 attenuator (front) or 50 Ω // 20 pF (rear) |
Time base stability | ≤1×10-5; Opt. 1, ≤5×10-7 (0°C to +50°C after ½h warm-up) |
Time base drift | ≤1×10-5; Opt. 1, ≤1×10-7 (per month) |
Options
- Option 1 – 5 MHz TCXO with 1:5 divider
- Option 2 – Automatic Gate Control and Readout Scaling Circuit (automatically selects the 0 .1-, 1-, or 10-second measurement interval to display the largest number of digits without overflow)
Links
Documents Referencing DC501
Document | Class | Title | Authors | Year | Links |
---|---|---|---|---|---|
Tekscope 1972 V4 N3 May 1972.pdf | Article | TM500 series - A New Dimension in Plug-in Instrumentation | Bob Ragsdale | 1972 | TM500 system • TM501 • TM503 • FG501 • FG502 • RG501 • PG501 • SG502 • DC501 • DC502 • PS501 • PS502 • PS503 |
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 • SW503 • SW504 • TG501 • TR501 • TR502 |
Rear Interface
Connector Pin | Signal |
---|---|
28B | Second decimal point (D2) output |
27A | Internal scan clock disable input |
27B | MHz light output |
26A | Reset input/output |
25A | TS0 (Time Slot Zero) output |
25B | External scan clock input |
24B | Internal scan clock (2 kHz) output |
23B | Overflow output |
22B | MSD (most significant digit) |
20B | 28 BCD output, serial by digit |
20A | 24 BCD output, serial by digit |
21B | 22 BCD output, serial by digit |
19A | 21 BCD output, serial by digit |
19B | Data Good output |
17A | Signal input ground |
16A | Signal input |
Gerbers
Pictures
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Manual photo
Components
Some Parts Used in the DC501