  We explored the `spectro - temporal' behaviour of outbursting Black Hole
sources in X-rays, at the time of jet ejections which are observed as radio
flares. The energy dependent evolution of the properties of all the sources
studied, shows that during the ejections the QPO frequencies `disappear' as
well as the disk (thermal) emission increases, implying the soft nature of the
spectrum. These results can be understood based on the TCAF model (Chakrabarti
& Titarchuk 1995), in the presence of magnetic field.
