31. Conversely, all circuit elements, even " linear " elements, show nonlinearity as the signal level is increased. 32. Signal levels are very low, and specialised electronic amplifiers are required to amplify the EFNMR signals to usable levels.33. This was a limitation for a portable radio; the signal level could vary when the listener turned their head. 34. Even though tropospheric ducting has been occasionally observed down to 40 MHz, the signal levels are usually very weak. 35. A VU meter is often included in analog circuit, audio equipment to display a signal level in Volume Units. 36. The main factors were the topography ( set in the Western Maine Mountains ), and the radio interference signal level . 37. A low-flow VFS is used as a signal level devices for transmission line pressure control or application of clutches. 38. The signal levels seen by the range safety receivers are checked before launch and monitored throughout flight to ensure adequate margins. 39. Decreasing noise at 16 kHz also decreases the maximum signal level at 16 kHz, the HighFrequency-Dynamics stay almost constant. 40. The larger aperture of radio antennas results in much greater signal levels for a given path length and therefore higher information capacity.
