Necessary Bandwidth Description

0118-EX-ML-2015 Text Documents

ELTA North America

2015-06-01ELS_163039

ELTA North America Request for FCC Experimental License Modification Request - Frequency addition Call Sign: WH2XNE Form 442 File Number: 0118-EX-ML-2015 Form 442 Confirmation Number: EL428960 01 June 2015 Reference: Form 442 File Number: 0082-EX-ML-2015 Form 442 Confirmation Number: EL458753 Necessary Bandwidth Calculation The necessary bandwidth was determined using the equation in Annex J of the NTIA Manual1 for FM-pulsed radars (see Equation 1). 1.79 𝐵𝑛 = 𝐵(−20 𝑑𝐵) = + 2𝐵𝑐 (1) √𝑡𝑟 ∙𝑡 where Bn = necessary bandwidth, MHz tr = pulse rise time, s t = pulse width, s Bc = frequency deviation (chirp) bandwidth, MHz The ELTA NA MARS-K emission characteristics are given in Table 1. Applying these parameters to Equation 1, results in a maximum necessary bandwidth of 66.6 MHz. Table 1 Emission Characteristics Pulse width 0.1 s Pulse rise/fall time 10 ns Maximum frequency deviation 5 MHz 1 Manual of Regulations and Procedures for Federal Radio Frequency Management, Washington, DC: US Department of Commerce, National Telecommunications and Information Administration, 2008 (revision May 2011).


Document Created: 2015-06-01 18:28:48
Document Modified: 2015-06-01 18:28:48
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