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Galactic black hole candidate (BHC) XTE~J1118+480 during its 2000 outbursthas been studied in a broad energy range using the archival data of PCA andHEXTE payloads of {\it Rossi X-ray Timing Explorer}. Detailed spectral andtemporal properties of the source are studied. Low and very low frequencyquasi-periodic oscillations (QPOs), with a general trend of increasingfrequency are observed during the outburst. Spectral analysis is done using thecombined data of PCA and HEXTE instruments with two types of models: the wellknown phenomenological power-law model and the current version of the {\itfits} file of two-component advective flow (TCAF) solution as an additive tablemodel in XSPEC. During the entire period of the outburst, a non-thermalpower-law component and the TCAF model fitted sub-Keplerian halo rate werefound to be highly dominant. We suggest that this so-called outburst is due toenhanced jet activity. Indeed, the `outburst' subsides when this activitydisappears. We estimated X-ray fluxes coming from the base of the jet and foundthat the radio flux is correlated with this X-ray flux. Though the object wasin the hard state in the entire episode, the spectrum becomes slightly softerwith the rise in Keplerian disk rate in the late declining phase. We alsoestimated the probable mass of the source from our spectral analysis with theTCAF solution. Our estimated mass of XTE~J1118+480 is$6.99^{+0.50}_{-0.74}~M_\odot$ i.e., in the range of $6.25-7.49~M_\odot$.

Properties of the Black Hole Candidate XTE J1118+480 with the TCAF solution during its Jet Activity Induced 2000 Outburst