Description: Tektronix 492 Spectrum Analyzer, 50kHz to 21GHz Perfect working and cosmetic condition, has some minor scratches, see Photos and Video please. This listing is being sold as "parts only" just because this is old unit and there is no warranty! Selling As Is with No Warranty Due to Its Age and NO REFUNDS OR RETURNS! FrequencyCoaxial Input Bands: 50 kHz to 21 GHzExternal Waveguide mixers: 50 kHz to 325 GHz (applies to 492BP not 492PGM)Frequency Span492BP: 100 Hz/div to 10 GHz/div; 492PGM: 200 MHz to 1 GHz; both in 1, 2, 5 sequence; plus 0 Hz and MAXResolution Bandwidth (-6 dB bandwidth)492BP: 100 Hz to 3 MHz; 492PGM: 1 kHz to 3 MHz; both in decade stepsRF Input50 Ω, max. +30 dBm (1 W) CW; / 75 W peak pulse (1 µs, 0.1% duty factor)RF Attenuator0 dB to 60 dB, 10 dB stepsReference Level-117 dBm to +30 dBmSweep Speed10 sec/div to 20 µs/div, 1−2−5Video Bandwidth492BP: 0.3 Hz to 30 kHz; 492PGM: 3 Hz to 30 kHzMemoryNVRAM for up to 9 waveform displays, up to 10 front panel setups, plus 8 K for programming macrosTriggering ModesFree Run, Line, Video, Single, ExternalDisplayed Average Noise−30 dBm to −131 dBmDisplay Dynamic Range492BP: 90 dB; 492PGM: 80 dBCalibrator (Cal out)50 Ω, -20 dBm ±0.3 dB at 100 MHzRegarding the 492, Linley Gumm says,Given how complicated it was, many people contributed to the design. I currently have a list of 20 people. The problem is that I’m sure that I am missing several people and I hate to submit a list without them.The 492 was designed at the request of the military. They asked for a modern replacement of the 491. It was required that it provide coaxial input coverage of the lower microwave bands (~18 GHz), be very rugged, be a one person carry and fit through a submarine hatch. There was a lot more than that of course.When the 492 program started I was the project leader of the 7L18 and was still working to finish it off. The 7L18 was the first instrument at Tektronix to use a microprocessor. We had worked long and hard to learn how to electronically switch and control all the elements that were controlled by physical switch closures in the earlier instruments.Understand that to position the frequency of a YIG filter correctly with respect to the frequency of a YIG oscillator one must generate very quiet DC voltages accurate to roughly 1 part in 20,000 (i.e. 1 MHz in 18 GHz), so new control techniques were required. Plus the TEK-made YIG filter designed for the 7L18 was therefore ready for use in the 492.We had also learned quite a number of things not to do and this was also used to anchor the 492 program. I say this to note that most of the long lasting, “classic”, Tektronix products were often the second, but more often the third generation product by the same design group. The 492 was definitely a second generation product in its use of microwave components and a microprocessor based control system; perhaps a third if you lump the 7L12, 7L13 (microwave systems) and the 7L5 (electronic bus control system) together as a first generation.Larry Lockwood led the first part of the program. He defined the RF and microwave frequency conversion architecture of the 492. As the program progressed, Steve Morton became the project manager of the initial 492 program. Recognize that beyond that initial project, follow-on design work went on for years as new features were added. Further, after their initial design work in the initial portion of the project, designers often went on to do rather different subsystems in the follow-ons.I worked on the 492 as a circuit designer in the initial design and in several other roles later, none of which were leadership roles.The other people I can recall having worked on the 492 at some point in its life were: Robert Alm, Bob Bales, Carlos Beeck, Bill Benedict, Craig Bryant, Russell Brown, Wes Hayward, David Leatherwood, Gordon Long, Dave Morton, Bill Peterson, David Shores, Steve Skidmore, Dennis Smith, Phil Snow, Leighton Whitset, and Norman Witt.Be aware my spelling is often “inventive”. There are at least two other names I can’t bring to mind.
Price: 899.99 USD
Location: Los Angeles, California
End Time: 2024-11-05T04:38:13.000Z
Shipping Cost: N/A USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Tektronix
Model: Tektronix 492
Product: Spectrum Analyzer
MPN: 492
