Am Radio Tracking Error
Contents |
setting an automatic tuning mode. A radio frequency circuit produces a tuned signal and an untuned signal. A selector receives the tuned signal and untuned signal, and selects the tuned signal when the automatic tuning mode is set, and
Tracking Error In Excel
selects...http://www.google.com/patents/US5203031?utm_source=gb-gplus-sharePatent US5203031 - Am radio receiver with improved trackingAdvanced Patent SearchTry annualized tracking error the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS5203031 tracking error control systems APublication typeGrantApplication numberUS 07/605,837Publication dateApr 13, 1993Filing dateOct 30, 1990Priority dateOct 31, 1989Fee statusPaidAlso published asDE69015578D1, DE69015578T2, EP0426175A2, EP0426175A3, EP0426175B1Publication number07605837, 605837, US 5203031 A, US 5203031A,
Tracking Error Interpretation
US-A-5203031, US5203031 A, US5203031AInventorsSakae SugayamaOriginal AssigneeSanyo Electric Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (6), Referenced by (6), Classifications (14), Legal Events (5) External Links:USPTO, USPTO Assignment, EspacenetAm radio receiver with improved tracking US 5203031 AAbstract An AM radio receiver includes an automatic tuning circuit for setting an automatic tuning mode. A radio frequency circuit
Tracking Error Etf
produces a tuned signal and an untuned signal. A selector receives the tuned signal and untuned signal, and selects the tuned signal when the automatic tuning mode is set, and selects the untuned signal when the automatic tuning mode is not set. An intermediate frequency signal generator produces an intermediate frequency signal based on the selected signal. Images(3)Claims(6) What is claimed is: 1. An AM radio receiver which receives a radio frequency signal comprising:an automatic seeking circuit means for setting an automatic signal seeking mode and for producing a first signal indicative of automatic tuning thereof and a second signal indicative of a signal receiving mode; radio frequency circuit means for producing in response to the received signal a tuned signal of a fixed frequency band and an untuned signal; selector means for receiving said tuned signal and said untuned and responsive to the output of said signal seeking means for selecting said tuned signal when said second signal is pr
In Join CBSNews.com Sign in with CBS Moneywatch Markets Money Work Small Business Retirement Tech Trending Video Get By Larry Swedroe MoneyWatch September 28, 2012, 1:05 PM "Tracking error" regret ex ante tracking error is a real risk An investor gestures as she looks at the stock price monitor
Tracking Error Formula
at a private securities company in Shanghai, China, on Aug. 10, 2012. AP Photo Comment Share Tweet Stumble Email (MoneyWatch) Investing in stocks tracking error calculation example involves accepting economic and political risks in return for higher expected returns than you can earn investing in Treasury bills or CDs. To help address these risks, investors can diversify their investments. However, the pain of trailing http://www.google.com/patents/US5203031 common benchmarks is something that diversified investors must take into account to be successful. The benefits of diversification are well known. In fact, diversification is often referred to as the only truly free lunch, because done properly it allows you to reduce the risk of your portfolio without reducing expected returns. Even William Shakespeare, in "The Merchant of Venice," showed that he understood the importance of diversification. As one character in the play says, "My ventures http://www.cbsnews.com/news/tracking-error-regret-is-a-real-risk/ are not in one bottom [ship] trusted, nor to one place, nor is my whole estate upon the fortune of this present year. Therefore, my merchandise makes me not sad." Unfortunately, my experiences as both an investor and advisor have taught me that diversification isn't truly a free lunch for most investors -- with it comes the very real risk known as "tracking error regret." Tracking error is defined as the difference between a fund or portfolio and a benchmark. Most often the benchmark is a commonly referred to index such as the S&P 500 Index. If your portfolio consists solely of an investment in an S&P 500 fund, you're not exposed to any tracking error risk. However, your portfolio isn't well diversified, being exposed only to large-cap U.S. stocks. Once you diversify beyond that index, you are taking the risk of tracking error.Why investors should diversify sources of returnsShould you dump your international stocks?How innovation affects stock prices and returns Most investors never question a divergence in their returns from a benchmark when it's positive. But when tracking error is negative it can lead to investors questioning, and even abandoning, their investment plans. And that's the danger. We'll take a look at the problem tracking error creates, beginning with a look at what happens when you add international investments to your domestic portfol
Tracking Calculator In superheterodyne radio receivers, a local oscillator (LO) must produce a frequency greater (or less) than the received frequency by a fixed value, the intermediate frequency (IF). This is then mixed with the received signal to produce the desired IF signal for the succeeding http://tubularelectronics.com/?p=70 IF amplifiers. Early radio sets used two basic approaches to the design of the tuning capacitors. One approach had two dissimilar variable capacitors ganged together, one was for tuning the station frequency, and the other was for tuning the local oscillator. Obviously, with the correct design and adjustment of these two capacitors one could (theoretically) achieve perfect tracking of the IF. Another approach was to use a dual-ganged tuning capacitor where both sections were identical. tracking error A "padder' capacitor in series with the oscillator section would cause the oscillator frequency to track at a fixed frequency above the received frequency. However this arrangement produced only a close approximation of the intermediate frequency required. This simple spreadsheet produces a graph of the deviation from the ideal IF across the AM broadcast band. It allows the selection of all capacitor and inductor values, and permits "tweaking" of the trimmer and padder capacitors for tracking error in optimization of the tracking error. (This spreadsheet was originally published on the web in response to discussions on the Antique Radios Forum regarding a one-tube reflex superhet design.) Click Here for Simple Index of Spreadsheet and Image Files //--------------- Tracking Calculator Spreadsheet Instructions Select the maximum variable capacitor value, Cmax(LO,RF) in Farads (i.e. 365E-12). Select the desired IF frequency, IF (kHz)(i.e. 455). Enter a value for C Step that causes dial scale 30 to reflect the usable upper range of the tuning capacitor (C Step is usually around .90 to .99). Or first select an RF inductance (or antenna coil) value, L(RF), to give you the lowest desired frequency (dial scale 1) in the RF(kHz) column, and then select a C Step value that gives you the upper frequency in the RF(kHz) column. Now work with different values of L(LO), C LO Trim, and C LO Pad to obtain acceptable tracking as viewed by the graphs. Observe the relationship of these components to the amount of tracking or mistracking. The circuit modeled is a variable tuning capacitor and a trimmer capacitance in parallel. The padder capacitor is in series with this parallel combination. This spreadsheet has been checked for accuracy, but is not guaranteed to be error free. Good luck. Click Here for Simple Index of Spreadsheet and Image Files Posted in Current Articles