FG504

Tektronix FG504
40 MHz function generator Tektronix FG504 Produced from 1976 to 1993 Manuals Tektronix FG504 Manual (OCR, PDF) FG504 Article in 1976 Volume 8 Number 2 Tekscope (PDF) (All manuals in PDF format unless noted otherwise)

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 V_p-p (OC), 15 V_p-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 V_p-p for 100%

FG504 front panel
FG504 in mainframe
FG504 without covers
Main board - output amplifier, attenuator, rise/fall time switch
Detail of output amplifier. Trimmer capacitors for high frequency compensation.
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.
Ceramic 10 dB divider lifted to show resistor network. Laser trimming marks can be seen.
Function generator board that synthesizes the triangle and sine out of a square wave
Timer board
Circuit detail