FG504

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Tektronix FG504
40 MHz function generator
Tektronix FG504

Produced from 1976 to 1993

Manuals
(All manuals in PDF format unless noted otherwise)
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

Documents Referencing FG504

Document Class Title Authors Year Links
070-2088-01.pdf Book TM500 Series Rear Interface Data Book 1976
Tekscope 1976 V8 N1.pdf Article New Products 1976
Tekscope 1976 V8 N2.pdf Article The FG504 - A New Standard in Function Generators Ira Pollock 1976
Tekscope 1977 V9 N2.pdf Article Measuring Harmonic Distortion with a Spectrum Analyzer Ken Matheson 1977
Tekscope 1978 V10 N2.pdf Article Pulse Generator or Function Generator - Making an Intelligent Choice Bill Rasnake 1978
070-2088-04.pdf Book TM500 Series Rear Interface Data Book 1985

Rear Interface

Right (as seen from the front, main board)

Pin Signal
28A Output (via 30 kΩ)
27A Output Common

Left (mechanically floating interface board)

Pin Signal Pin Signal
28B Trig Output Common 27A nc
27B Trig Output 27A GND
26B Phase Lock Error Voltage 26A Sweep Reset Output
25B Trig/Gate Common 25A Linear Sweep Output
24B Trig/Gate Input 24A nc

23B nc 23A AM Input
22B VCF Input Common 22A Sweep Trigger Input
21B VCF Input 21A nc

Internals

The FG504 takes +/– 33 V from the right slot to create a +/– 15 V supply, and the + 11.5 V for a +5 V supply. It uses the 25 VAC windings, 17.5 VAC, and + 11.5 V on the left slot for a +/– 25 V supply to the output amplifier. The regulators incorporate the mainframe pass transistors on both slots.

U770 is a 155-0032-00 below S/N B057720, a 155-0217-00 from B057720 on.

Pictures

External

Internal

Operation

Schematics and Locations

Components

Some Parts Used in the FG504

Part Part Number(s) Class Description Used in
155-0032-00 155-0032-00 155-0032-01 Monolithic integrated circuit variable-gain transconductance amplifier 335 464 465 465B 466 475 475A 475M 634 650 651 652 653 655 656 670 671 7A12 475 FG504 1440 1460 1480 1481 1482 1485
155-0217-00 155-0216-00 155-0217-00 Monolithic integrated circuit variable-gain transconductance amplifier 335 475 7D20 FG504
CA3046 156-0048-00 Monolithic integrated circuit transistor array 7104 7403N 7503 7B53A 7D12 DM502 FG504 S-52 Telequipment D34 7603 7613 7623 7633