SG505: Difference between revisions

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USA Tektronix SG505 Front0.jpg|Front Panel
USA Tektronix SG505 Front0.jpg|Front Panel
Tek sg505 front.jpg|Front Panel
SG505_Right_Internal.jpg|Right Side Internal
SG505_Left_Internal.jpg|Left Side Internal
USA_Tektronix_SG505_LayoutSide.jpg|PCB Right Side
USA_Tektronix_SG505_LayoutSide.jpg|PCB Right Side
USA_Tektronix_SG505_CompSide.jpg|PCB Left Side
USA_Tektronix_SG505_CompSide.jpg|PCB Left Side
USA_Tektronix_SG505_CompSideB.jpg|PCB Left Side Detail
USA_Tektronix_SG505_CompSideB.jpg|PCB Left Side Detail
Tek sg505 front.jpg|Front Panel
SG505_Option2_3-4_View.jpg|Option 2 3/4 View
SG505_Option2_3-4_View.jpg|Option 2 3/4 View
SG505_Option2_Front_Panel.jpg|Option 2 Front Panel
SG505_Option2_Front_Panel.jpg|Option 2 Front Panel

Revision as of 08:10, 30 September 2022

Tektronix SG505
ultra-low distortion oscillator
Tektronix SG505

Produced from 1980 to 1993

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix SG505 is an ultra-low distortion oscillator plug-in for the TM500 system.

Option 01 adds an intermodulation test signal function.
Option 02 adds a fully balanced output to +28 dBm and selectable source impedance with corresponding changes to the front panel connections. It also includes Option 01.

Key Specifications

Frequency range 10 Hz to 100 kHz nom. (typ. 9 Hz to 110 kHz) in four overlapping ranges
Frequency accuracy 3% of dial reading
Output level +10 dBm to −60 dBm into 600 Ω in eight 10 dB steps, plus variable control +2.2 dB to −10 dB from calibrated position
Output impedance 600 Ω
Distortion < 0.0008% (−102 dB) from 20 Hz to 20 kHz
Sync output 200 mVRMS sine to 20 kHz, at least 120 mV @ 100 kHz; 1 kΩ source impedance

Internals

The SG505 uses a state-variable oscillator topology employing NE5534 opamps and an N-FET (151-1021-00) based AGC. Range switches change capacitors and AGC time constants, the main dial changes the integrator resistor.

It's internally an surprisingly unremarkable device, no special tricks or selected parts (except for the AGC FET, which is probably some COTS FET selected for threshold voltage and distortion), just an ordinary SVO, some NE553x, standard attenuator and that's it.

See Also

Pictures