VCR Tuner Based Spectrum Analyzer

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[spec-11]

Tap point for the final (455 kHz) IF inside the PRO-2042 scanner.

[spec-20]

Additions include an input attenuator (120 dB / 10 dB per step), a 10 MHz marker generator, wideband IF filtering, selectable IF attenuation and a new power supply.

[spec-24]

New case!

[spec-25]

10 MHz marker generator on the left, power supply regulators in the middle and the big box on the right is the variable IF attenuator.

[spec-26]

Multiturn tuning resistors and the step attenuator.

[spec-27]

AC input on the right, the top BNC jacks are for the detector and the tuner is on the right.

[spec-28]

In the middle is the 1 kHz tone generator and the IF filers.

[spec-29]

Sweep generator circuits.

[spec-30]

Top view.

[spec-31]

RF input switch for VHF/UHF and the tuner's oscillator output (bottom).