automatic night lamp with morning alarm using microprocessor
... microprocessor. The program of this alarm was used the assembly language and implement to the hardware. The alarm is controlled by IC 555. This alarm is available which, due to the output of timer IC 555. It is because LDR will converts the light energy into electrical energy and this variable elect ...
... microprocessor. The program of this alarm was used the assembly language and implement to the hardware. The alarm is controlled by IC 555. This alarm is available which, due to the output of timer IC 555. It is because LDR will converts the light energy into electrical energy and this variable elect ...
chapter2 - e-LEARNING
... transmitter, legally. When there is no modulation the output power is 1,000 watts. When it is modulated to 100 percent the power in the carrier does not change but additional power is put into the sidebands. That means the power in each sideband is 250 watts. So the total for the carrier plus bo ...
... transmitter, legally. When there is no modulation the output power is 1,000 watts. When it is modulated to 100 percent the power in the carrier does not change but additional power is put into the sidebands. That means the power in each sideband is 250 watts. So the total for the carrier plus bo ...
Digital Modulation
... Linear Modulation Techniques: Digital modulation can be broadly classified as: 1. Linear (change Amplitude or phase) 2. Non linear modulation techniques (change frequency). Linear Modulation Techniques: ...
... Linear Modulation Techniques: Digital modulation can be broadly classified as: 1. Linear (change Amplitude or phase) 2. Non linear modulation techniques (change frequency). Linear Modulation Techniques: ...
fpga implementation of phase locked loop (pll) with
... controlled oscillator, phase detector or comparator, low pass filter (fig.2). The oscillator generates a periodic signal. The phase detector compares the phase of that signal with the phase of the input periodic signal and adjusts the oscillator to keep the phases matched. Bringing the output signal ...
... controlled oscillator, phase detector or comparator, low pass filter (fig.2). The oscillator generates a periodic signal. The phase detector compares the phase of that signal with the phase of the input periodic signal and adjusts the oscillator to keep the phases matched. Bringing the output signal ...
Reduction of Induced Voltages deriving from Ground Return
... compared to the one of the inductances in the frequency range for the FM band. The equivalent circuit of this kind consists of the inductances: Li (i=1,2) of the signal trace i and lij (i=2,3,4; j=1,2,4) between Node i and Node j of the ground layer pattern. Also shown in Fig. 5(b) is the one rewrit ...
... compared to the one of the inductances in the frequency range for the FM band. The equivalent circuit of this kind consists of the inductances: Li (i=1,2) of the signal trace i and lij (i=2,3,4; j=1,2,4) between Node i and Node j of the ground layer pattern. Also shown in Fig. 5(b) is the one rewrit ...
![[device] datasheet](http://s1.studyres.com/store/data/002038508_1-0f294a44c84528398edaf3d88a3ab534-300x300.png)
[device] datasheet
... Do not install device near strong electromagnetic field or heating source! Do not place device near water or other liquids! Install GSM/GPS antena below glass or plastic. Avoid installation below metal surfaces which can disturb GSM/GPS signal receiving and transmission! Supply device with voltage a ...
... Do not install device near strong electromagnetic field or heating source! Do not place device near water or other liquids! Install GSM/GPS antena below glass or plastic. Avoid installation below metal surfaces which can disturb GSM/GPS signal receiving and transmission! Supply device with voltage a ...
Sampling Bounds for Sparse Support Recovery in the Presence of
... rate per sample is needed. In this paper, it is shown that an unbounded SNR is also a necessary condition for perfect recovery, but any fraction (less than one) of the support can be recovered with bounded SNR. This means that a finite rate per sample is sufficient for partial support recovery. Nece ...
... rate per sample is needed. In this paper, it is shown that an unbounded SNR is also a necessary condition for perfect recovery, but any fraction (less than one) of the support can be recovered with bounded SNR. This means that a finite rate per sample is sufficient for partial support recovery. Nece ...
1.2 Peak Detection System
... The error rate of the threshold part of the peak detection system is determined by the probability of drop-outs when the pulse amplitude falls below the specified threshold or the probability of strong noise outbursts when total media and electronic noise exceeds the specified signal level. The erro ...
... The error rate of the threshold part of the peak detection system is determined by the probability of drop-outs when the pulse amplitude falls below the specified threshold or the probability of strong noise outbursts when total media and electronic noise exceeds the specified signal level. The erro ...
Chapter 5
... Electrical signals can take many forms and can be analogue or digital A simple analogue form is where a voltage is proportional to the amplitude of a quantity being represented A simple digital form is where the voltage takes one of two values to represent the two states of a quantity Modula ...
... Electrical signals can take many forms and can be analogue or digital A simple analogue form is where a voltage is proportional to the amplitude of a quantity being represented A simple digital form is where the voltage takes one of two values to represent the two states of a quantity Modula ...
Amateur Radio Technician Class License Study Guide
... An amateur station is required to transmit its assigned call sign at least every 10 minutes during and at the end of a contact. [97.119(a)] The English language is an acceptable language for use for station identification when operating in a phone sub-band. [97.119(b)] The method of call sign identi ...
... An amateur station is required to transmit its assigned call sign at least every 10 minutes during and at the end of a contact. [97.119(a)] The English language is an acceptable language for use for station identification when operating in a phone sub-band. [97.119(b)] The method of call sign identi ...
Automating Microwave Measurements With Software Defined
... for its functionality, significantly reduces test development and refactoring time. In production bench-top test applications or automated test systems (ATS), multifunction SDSIs can support a broad range of different RF/microwave DUTs by simply changing the underlying TPSs and the physical interfac ...
... for its functionality, significantly reduces test development and refactoring time. In production bench-top test applications or automated test systems (ATS), multifunction SDSIs can support a broad range of different RF/microwave DUTs by simply changing the underlying TPSs and the physical interfac ...
5. Control of the output signal
... - Self test ................................................................................................................................................... 4 - Touch screen functionality ............................................................................................................. ...
... - Self test ................................................................................................................................................... 4 - Touch screen functionality ............................................................................................................. ...
High-frequency direction finding
High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is the common name for a type of radio direction finder (RDF) introduced in World War II. High frequency (HF) refers to a radio band that can efficiently communicate over long distances; for example, between U-boats and their land-based headquarters. HF/DF was primarily used to catch enemy radios while they transmitted, although it was also used to locate friendly aircraft as a navigation aid. The basic technique remains in use to this day as one of the fundamental disciplines of signals intelligence, although typically incorporated into a larger suite of radio systems and radars instead of being a stand-alone system.Huff-duff used a set of antennas to receive the same signal in slightly different locations or angles, and then used the slight differences in the signal to display the bearing to the transmitter on an oscilloscope display. Earlier systems used a mechanically rotated antenna (or solenoid) and an operator listening for peaks or nulls in the signal, which took considerable time to determine. Huff-duff's speed allowed it to catch fleeting signals, such as those from the U-boat fleet.The system was initially developed by Robert Watson-Watt starting in 1926, although many of the practical elements were not developed until the late 1930s. Huff-duff units were in very high demand, and there was considerable inter-service rivalry involved in their distribution. An early use was by the RAF Fighter Command as part of the Dowding system of interception control, while ground-based units were also widely used to collect information for the Admiralty to locate U-boats. Between 1942 and 1944, smaller units became widely available and were common fixtures on Royal Navy ships. It is estimated huff-duff contributed to 24% of all U-boats sunk during the war.The basic concept is also known by several alternate names, including Cathode-Ray Direction Finding (CRDF), Twin Path DF, and for its inventor, Watson-Watt DF or Adcock/Watson-Watt when the antenna is considered.