Im Buch gefunden – Seite 54This means that a receiving antenna located below the horizon from the transmitting antenna receives no signal either from the ground wave or the sky wave . When the receiver is within line - of - sight distance to the transmitter , however , it ... Im Buch gefunden – Seite 2763Sky wave transmission as shown on between desired and field intensity of chart in ... no the desired signal 10 kc removed in fre- rier to undesired carriers ... Im Buch gefunden – Seite 99Thus the voltages cancel themselves out and no voltage is applied to the grid of the detector tube in the receiver, resulting in no signal in the headphones ... Im Buch gefunden – Seite 40... occur at a receiver during the time a signal is being received . Fading may occur at any point where both the ground wave and the sky wave are received ... Im Buch gefunden – Seite 140The xż of the 92 + 94 components of the signals is statistically inconsistent with an assumption of no common sky signal . Table 1. Im Buch gefunden – Seite 26a peak temperature of 0.01K. What is the ratio of the signal intensity to that ... amplifier at 234MHz should you buy an expensive receiver for use at a sky ... Im Buch gefundenSky search : This uses the search engine under cold - start and warm - start ... where the GNSS receiver typically has no PVT information and little or no ... Im Buch gefundenAs seen in figure 6 , the antenna is held by an operator who wears headphones carrying the video signal from the receiver audio output . Im Buch gefunden – Seite 497... thereby giving no signal on the receiver's linearly polarized antenna , unless ... antenna having circular polarization over most of the entire sky . Im Buch gefunden – Seite 121Although the weather radar indicated no rain along the downlink , the sky was partly cloudy ... When the receiver did regain phase lock on a strong signal ... Im Buch gefunden – Seite 72Similarly , there may be no signal if the MPL repair team is working on the system , which may be disconnected . ... If the sky is not dark , but the images are dark , the most likely cause is a problem with the fiber linkages or the fiber receiver ... Im Buch gefunden – Seite 46A satellite receives a signal from a ground transmitter–the uplink– and re-transmits ('reflects') the signal to a ground receiver – the downlink. Im Buch gefundenOne way to reduce The effect of a bright sky is to narrow he field of view of the lidar . If highquality receiver optics are used , with ollimating ... Im Buch gefunden – Seite 4351for desired signal to the undesired sky wave signal for 10 percent or more ... where no interference would be caused to a receiver responding faithfully to ... Im Buch gefunden – Seite 273If the two signals arrive at the receiver in phase , so that the crests and ... and no signal is detectable if the two components are of equal strength . Im Buch gefunden – Seite 265The satellite, in turn, sends a signal that tells your GPS receiver about the ``leap second''. However, this ``leap second'' signal is transmitted only once ... Im Buch gefunden – Seite 12Expected performance of the PLANCKLFI receivers Sky Temperature ∼3 K Sky Temperature ... signal at 2.7 K. However, the LFI group mentions that “there is no ... Im Buch gefunden – Seite 70There was no signal traffic, no navigation beacons, nothing. Comparing image after image of the night sky detected no artificial satellites. Im Buch gefunden – Seite 294A wave reaching a receiver by way of the ionosphere is called a sky wave . This expression is also appropriately applied ... At angles greater than the critical angle , no sky - wave signal is received . Therefore , there is a minimum distance from ... Im Buch gefunden – Seite 119We can measure a weak input signal, S = T(signal)e−τ, in the presence of ... amplifier at 234MHz should you buy an expensive receiver for use at a sky ... Im Buch gefunden – Seite 291A class I - A station , since no other station is permitted to operate at ... of such a station's signal is the distance to which the sky - wave signal ... Im Buch gefunden – Seite 67The detailed thermodynamics of the noise from the receiver and various ... of no surprise to radio engineers today; the result showed that the sky had a low ... Im Buch gefunden – Seite 25Wilson and Penzias, trying to minimize the noise of their receiver, pointed the antenna toward a place in the sky where no signal was expected, ... Im Buch gefunden – Seite 105In communications receivers this signal contains a carrier frequency and/ or ... In radio astronomy, of course, there is no modulated signal, although the ... Im Buch gefunden – Seite 231The receiver spends only part of the time measuring the signal power . ... as a resistor at constant temperature or else some particular part of the sky . Im Buch gefunden – Seite 34Sky Channel carries popular programmes to receivers at cable television ... to lose power, no amount of signal boost from the ground station will help. Im Buch gefunden – Seite 72So if Penzias and Wilson pointed their antenna at the sky and had no signal left when they had done their accounting then all would be fine . Im Buch gefunden – Seite 190Under no cator and Loran - A charts or tables , circumstances should a loran ... Usable skywave coverage with a sky wave signal of the other staexists to ... Im Buch gefunden – Seite 32Should any of these parameters be unavailable , the receiver conducts a ' sky search . ... It must possess a low noise figure since any noise added to the signal increases the difficulty of the carrier signal phase measurement and pseudo ... Im Buch gefunden – Seite 8-118.2.2 BACKGROUND RADIATION AND SKY RADIANCE In a number of applications, ... to the optical signal and it negatively affects the receiver performances. Im Buch gefunden – Seite 75The resulting signal is called Pulse Code Modulation , Bi - O - L , Phase Shift ... Part of the noise comes from the background sky and part from receiver ... Im Buch gefunden – Seite 4-48Both the intended signal and the radar's signal will typically propagate by sky wave . Because the single Fixed receiver might be anywhere on earth , no ... Im Buch gefunden – Seite 159Signal Signal Receiver Receiver Generator Dummy Generator Wave - band Dial Trimmer Connection Antenna Frequency Switch Setting Number Ant . 2 Note 2 950 - 1500 kc 8 No . 1 Note 4 Ant . 15 Osc . 1 Ant . 2 Osc . 2 Ant . 3 Osc . 3 Ant ... in series between signal - generator and antenna lead . Be sure the lead to the antenna transformer is plugged into the " SKY ” socket of the Antenna Transformer . Im Buch gefunden – Seite 61Tuning the receiver through the satellite signal should produce chart ... level and then down to the sky level as the tuning frequency is changed . If no ... Im Buch gefunden – Seite 186Figure 73 illustrates the idea of the sky wave . IONOSPHERE SKY WAVE TRANSMITTER REGION OF NO SIGNAL RECEPTION RECEIVER GROUND WAVE SINGLE HOP REGIONS OF SIGNAL RECEPTION EARTH MULTIPLE HOP su 1 - . Im Buch gefunden – Seite 54Digital signal compression eliminates the redundant information in a signal. For example, a large expanse of blue sky in a picture carries little or no new ... Im Buch gefunden – Seite 54... broadcasting and short - wave broadcasting the signal at a receiver is composed of a ground wave and a sky wave . ... This means that a receiving antenna located below the horizon from the transmitting antenna receives no signal either ... Im Buch gefunden – Seite 9-2Generally, the lower the frequency, the farther the signal travels. ... Frequencies above 100 MHz have nearly no ground or sky wave components. Im Buch gefunden – Seite 167No noticeable effect of this principle is observed until the wave front ... at any given receiver there is a maximum usable frequency if skywaves are to be ... Im Buch gefunden – Seite 294A wave reaching a receiver by way of the ionosphere is called a sky wave . This expression is also appropriately applied ... At angles greater than the critical angle , no sky - wave signal is received . Therefore , there is a minimum distance from ... Im Buch gefunden – Seite 80SIGNAL STRENGTH 50 db . above S - 9 45 40 35 30 25 20 15 10 5 S - 9 S - 8 S - 7 S - 6 S - 5 S - 4 S - 3 S - 2 S - 1 MILLIAMMETER DEFLECTION 0.87 0.85 0.83 0.80 ... 10575 A LARGE number of Hallicraf ters S20R Sky Champion receivers are in use at amateur stations . ... In view of the shortage , no ham would object to building his own Smeter if the circuit and calibration data were offered to him . Im Buch gefunden – Seite 71If there is no static , no man - made noise , no interference from other stations ... Beyond that , the sky - wave signal takes over and becomes the sole ... Im Buch gefunden – Seite 291A class I - A station , since no other station is permitted to operate at ... of such a station's signal is the distance to which the sky - wave signal ... Im Buch gefunden – Seite 13a parcases the background noise at the receiver input was kept down to 170 ° Kelvin . ... so it was necessary to add together all of the several thousand received echoes - plus - noise to build up the signal - tonoise ratio . ... By matching up the outgoing and returning patterns , no ambiguities in time of travel will remain . Im Buch gefunden – Seite 2-121 SIGNAL STRENGTH MICROVOLTS 50 - w um الی با معماری مرمر RECEIVER NO . ... ( 2 ) propagation angle , ( 3 ) time delay , ( 4 ) percentage days with sky - wave mode ( the percentage of days within a one month period where sky - wave is ... Im Buch gefundenTuning the receiver through the satellite signal should produce chart ... level and then down to the sky level as the tuning frequency is changed . If no ... Im Buch gefunden – Seite 28661:50 . listeners adjust variable selectivity receivers based on ground waves only and do not 40 kc and above .----- . No restriction . " where the signal is ... Im Buch gefunden – Seite 25A radio receiver in the ground wave area , shaded on the graph ... These areas of no signal are known as the " skip distance " of the sky wave . Im Buch gefunden – Seite 123So, receivers A and B give redundant measurements of the sky signal, ... could account for the correlations *, but the paper makes no mention of this point. Im Buch gefunden – Seite 3243A signal arriving by this means is commonly called the sky - wave signal . ... This type of signal collector , together with its associated receiver ...
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