FG504

Manuals – Specifications – Links – Pictures

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 and PS503A in TM504