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The symbol dBrn or dB(rn) is an abbreviation for decibels above reference noise.. Weighted noise power in dB is referred to 1.0 picowatt.Thus, 0 dBrn = -90 dBm.Use of 144 line, 144-receiver, or C-message weighting, or flat weighting, can be indicated in parentheses.
Many different levels with a number of different weightings are in current use, and care must be taken to ensure that the proper parameters are stated. Specific ones include: dBa , dBa(F1A), dBa(HA1), dBa0, dBm , dBm(psoph), dBm0 , dBrn , dBrnC , dBrnC0, dBrn(f 1 -f 2 ), dBrn(144-line), dBx.
UN Number Class Proper Shipping Name UN 0301: 1.4G: Ammunition, tear-producing with burster, expelling charge, or propelling charge UN 0302? (UN No. no longer in use) UN 0303: 1.4G: Ammunition, smoke, with or without burster, expelling charge, or propelling charge UN 0304? (UN No. no longer in use) UN 0305: 1.3G: Flash powder: UN 0306: 1.4G ...
n.o.s. = not otherwise specified meaning a collective entry to which substances, mixtures, solutions or articles may be assigned if a) they are not mentioned by name in 3.2 Dangerous Goods List AND b) they exhibit chemical, physical and/or dangerous properties corresponding to the Class, classification code, packing group and the name and description of the n.o.s. entry [4]
The Baltic Dry Index tracks the prices for several kinds of dry bulk shipping. It monitors those rates across 26 key shipping routes for dry bulk ships that carry commodities such as coal, iron ...
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Examples of electrical noise-level measurement units are dBu, dBm0, dBrn, dBrnC, and dBrn(f 1 − f 2), dBrn(144-line). Noise may also be characterized by its probability distribution and noise spectral density N 0 (f) in watts per hertz. A noise signal is typically considered as a linear addition to a useful information signal.
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