Offered without reserve, this Tektronix 494P spectrum analyzer is in excellent electrical and cosmetic condition. All operating and service manuals are included on CD. The analyzer and its accessories are guaranteed to be fully functional with a three-day buyer inspection period.

Selling for nearly $50,000 in the late 1980s, many of the 494P's specifications still stand up to today's high-end instruments. Much more than just a refined 492, the 494P introduced a number of powerful signal-analysis features that sent the competition packing.

• 10 kHz - 21 GHz coverage with calibrated response to 325 GHz using optional mixers
• Built-in microwave frequency counter measures any signal > 20 dB above the noise floor with 1 Hz resolution
• 30 Hz resolution bandwidth to 60 GHz
• Near-zero drift -- internal frequency-reference standard aging rate = one part per billion per day
• Direct keypad entry of frequency, resolution, span width, and other key parameters
• Comprehensive built-in HELP mode explains operation of nearly all controls
• Interactive guided procedure for frequency and amplitude calibration
• Nonvolatile memory storage of up to 10 front-panel configurations and 9 display screenshots
• All 492 options are standard, including digital storage, GPIB programmability, and YIG preselection

All photographs in this auction are of the unit being offered. The CRT is bright and clear with no phosphor burns or double-peaking. Operating time is approximately 1,500 hours.

Calibration appears to meet factory specifications throughout, although I don't have the means to verify every aspect of performance.

Baseline phase-noise floor

Document your results! Add a Prologix or National Instruments GPIB card to your PC, and you'll be able to capture, overlay, and print screenshots from any Tektronix 490- or 2750-series analyzer with free software for Windows.

Delivery and Inspection Terms

The winning bidder will receive:

• Tektronix 494P S/N B010845 (Beaverton, Oregon production)
• Protective front cover
• 110V power cord
• Two spare fuses
• N male-BNC female coaxial adaptor
• Operation, GPIB programming, and service manuals on CD

This is a clean, well-performing instrument which is guaranteed fully operational with a 3-day inspection period. Your payment will be immediately refunded in full if you're not satisfied with the condition of the unit as represented -- no questions asked. (Return policy excludes damage to front-end mixer or attenuator.)

Terms: Buyer pays actual shipping via UPS or FedEx. No shipment to non-US-based addresses.

No additional handling charges will apply.

Feel free to use the Ask Seller a Question link above, or contact me directly at jmiles@pop.net if you have any questions prior to bidding. Thanks for your bid!