noted in the answers to the previous two questions, signal names recorded in header files describe the signals in each record. In rare cases, however, this information is missing, usually because it was not preserved when the signals were recorded. Names of the form 'signal N' are default signal names used in such cases; they may appear in header files explicitly, or they may be displayed by PhysioToolkit software if no explicit signal names appear in a header file.

Technical indicators generate various types of signals based on such events as the crossing of two lines, a line crossing an important threshold, or a particular pattern such as divergence between the price and the indicator. These events may provide an early warning of a price move and often provide investors with specific buy and sell signals.

Creating a mono signal is often necessary when you are powering a subwoofer by bridging the amplifier. Many people do not realize that bridging an amplifier does not always provide a mono signal - many amplifiers will simply use only one input channel, which means that the subwoofer won't be receiving the full signal. Some amplifiers have a switch that will allow you to combine the left and right channels into a mono signal.

Many formats are supported. Most signal files are written in "format 212", in which two 12-bit samples are bit-packed into three 8-bit bytes. See signal(5) in the WFDB Applications Guide for details on format 212 and on the other supported formats. To determine which format is used for a given signal file, look in the associated header file. (This is a text file that usually has the same name as the signal file, except for a suffix of .hea instead of .dat.

If you would like to read signal files within a C, C++, Fortran, Java, Perl, or Python program, see the WFDB Programmer's Guide for information on doing this using the WFDB library. Other programming languages supported by SWIG may also be usable with the WFDB library, but have not been tested. Briefly, use isigopen() to open the files, and getvec() to read them.

More generally, signal conditioning is converting a signal from some transducer to whatever your receiving system needs. Frequently it's a matter of amplifying the microvolt or millivolt signals you get from (for instance) a strain gauge to the 10V span you need to get good resolution for your analog to digital converter. However, many transducers give you strange things that you have to convert.

Check that AO-40 is in range and in the correct mode for the equipment you plan to use. e.g. U/S bands Tune your receiver to the beacon frequency on 2401.323 MHz +/- Doppler shift, and peak this signal by moving your antennas. Next, tune your transmitter to a frequency that corresponds to a quiet area of the transponder. Make sure you stay clear of the beacon! This is important as you will not be popular if you cause QRM to other users or interrupt the telemetry.

Signals transmitted below the noise floor can be recovered due to inherent processing gain. These signals will be invisible to narrow band users allowing for more efficient use of the spectrum.

No. That's a different kind of satellite dish. It's digital and is fixed on the satellite that is providing your home entertainment.

Anything in the path between you and the base station can block the signal. Especially trees and buildings. If you have a clear, optical, line of sight it will almost certainly work.

Roughly, there seems to be a two-mile range from the UHH Theatre. That means that the UHH Campus to the mall has coverage, but read the caveat below about signal strength.

This depends on where you are. If you are on campus, it is best in the areas around the Theatre. The UHH campus is mostly covered. The HawCC campus is covered with decent reception; if you have a good radio you can get it better. There are spots around town where the signal is good, and other spots where it does not reach. The signal comes in most clearly away from powerlines.

The input impedance of Crown amplifiers is high enough that paralleling multiple inputs together is not a problem. Using a standard "Y" cable works wonderfully. Without using a "Y" cable, the procedure is different depending upon the Crown amplifier used. Com-Tech amplifiers have barrier block inputs that make it easy to tie two or more channels together. With Macro-Tech amplifiers the 1/4" inputs are in parallel with the inputs of the PIP-FX.

Current research suggests that something triggers the immune system to suppress the hair follicle. It isn't known what this trigger is, and whether it comes from outside the body like a virus, or from inside. Recent research indicates that some persons have genetic markers that increase both their susceptibility to develop alopecia areata, as well as the degree of disease severity.

This is an often asked question as many people have difficulty with these cables as they are litz cables that have individually insulated conductors. In most cases we pre-terminate these cables when supplying them with our kits. However, because we get asked about this so often, we have prepared a support page with a step-by-step guide. Click here to view the process.

Short answer: MLII and V2 are ECG signals. The names refer to the electrode positions, using standard nomenclature for lead names. MLII is "modified lead II", a bipolar lead parallel to the standard limb lead II, but acquired using electrodes placed on the torso (a requirement for long-term ECG monitoring). V2 is a precordial lead that is roughly orthogonal to MLII.

Make sure your system is set up correctly for receiving and using the WHYY time signal. If everything looks okay set the time manually on your VCR/TV (set the time to a wrong time both in hours and minutes). Then set up again using the automatic function, turn off and/or unplug the equipment; turn everything back on and see if the time resets. If the time did not reset, you are not receiving the signal correctly. If the time resets, but the time is still incorrect, please call WHYY at 215.351.

Now obsolete, these meant to watch for turning traffic across the crosswalk (whereas a solid "WALK" meant that there should be none). These were once used extensively in DC, and some may still exist in places. Mar 10, 2004

Nope! You can use jumpers to connect all input channel connectors (plus and minus required, shield is discretionary). For the MA 6S, in normal (unbridged) mode, all channels are independent. In bridged mode, adjacent channels are paired for master/slave operation. The pairing for bridged mode is 1 & 2, 3 & 4, 5 & 6.

The PI 14 will work wonderfully well anywhere in the signal chain as long as the ECSTASY level is not exceeded. We frequently hear of people using too much ecstasy and having big problems.

Information on signal levels: http://homepage.ntlworld.com/robin.d.h.walker/cmtips/signal.html#signal A value of -15 or worse indicates a poor downstream signal path. A tech would aim for a value close to the optimal 0 dBmV, but a good cable modem should be capable of working within the broader range of -15 to +15 dBmV, provided the downstream Signal to Noise Ratio remains good enough. A value within the range +25 to +55 dBmV is within spec with 40's the most common.

No. The technology used by Phoenix Internet operates at very low power levels, similar to a cell phone, and much less than the amount that is emitted by your microwave oven. Also, radio frequency power drops dramatically as you move away from the power source. Typically, our antennas would not be placed where any person would be able to stand right in front of it for any significant period of time.

Possibly. However, you might have trouble getting a signal on the higher floors of a high-rise building. The best way to determine if you are serviceable for EarthLink Wi-Fi is to complete a serviceability check by visiting www.earthlink.net/wifi or by calling us at 877.WIFI.SALES (877.943.4725).

A:DISH Network offers the best HD programming package in the USA, with 39 channels shown in brilliant high definition. If you own a high definition television, we offer HD receivers and programming that is truly incredible to watch! Having the lowest all digital price nationwide is what makes Dish Network a leader in HD. Click here for our High Definition programming packages!

analog or analogue signal is any variable signal continuous in both time and amplitude. It differs from a digital signal in that small fluctuations in the signal are meaningful.

Check to see if the TV is on channel 3 (or 4) and if the VCR is on channel 3 (or 4). Also check to see if all the cords are properly plugged in. If you are still experiencing problems, contact us to see if there has been a power failure. This indicates that either your television or VCR is not tuned to cable channel 3 (or 4). This situation could also occur if the fine tuning on your external converter is out of alignment.

Check all of your connections. If the problem persists, contact customer service while the problem is happening. The band setting on your TV or VCR has reverted to the external antenna or off-air position. This allows the tuner to receive channels only up to 13. To correct this issue, locate the Cable or CATV setting, which can be found on the remote control (hand unit) or through your on-screen menu. Refer to your TV or VCR manual for more information.