FG504
The Tektronix FG504 is a 40 MHz function generator plug-in for the TM500 system.
Key Specifications
| Frequency range | Sine, Triangle and Square - 0.001 Hz to 40 MHz; Ramps, Pulses or asymmetric waveforms - 0.001 Hz to 4 MHz |
|---|---|
| Duty Cycle | 7% to 93% |
| Output Amplitude | 30 Vp-p (OC), 15 Vp-p (50 Ω) |
| Output Attenuator | 0 to 50 dB in 10 dB steps |
| DC Offset | ±7.5 V (OC), ±3.75 V (50 Ω) |
| Distortion | ≤ 0.5% from 20 Hz to 40 kHz |
| Rise/Fall Time | 6 ns (fixed), 10 ns to 100 ms in 7 steps + variable control |
| Sweep | 1000:1 (500:1 on 106 mult.) |
| AM input | 10 Vp-p for 100% |
Links
- Tekscope Vol. 8 No. 2, 1976: Ira Pollock, The FG504 - a new standard in function generators
- Tek FG5010 FG507 FG504 Description (PDF)
Pictures
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FG504 front panel
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FG504 in mainframe
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FG504 without covers
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Main board - output amplifier, attenuator, rise/fall time switch
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Detail of output amplifier. Trimmer capacitors for high frequency compensation.
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Detail of 50 Ω attenuator. Divider networks (under the ceramic chips) are switched in or bypassed by cam switches. The 0.3 amp output fuse can also be seen.
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Ceramic 10 dB divider lifted to show resistor network. Laser trimming marks can be seen.
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Function generator board that synthesizes the triangle and sine out of a square wave
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Timer board
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Circuit detail
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FG504 left internal
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FG504 left internal upside down
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FG504 right internal upside down
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FG504 right internal
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FG504 in TM502A
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FG504 in TM502A
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FG504 in TM502A
