This is a threat to us? What will BD use with the information it gathers? How will you protect this radar from DEAD/SEAD that IAF will do right away in any conflict?
Do you understand such radars are only good at discerning high-RCS targets past say 100 km? High volume search beyond that will give no discernment of what type of aerial target it is (i.e is it a cargo aircraft or a large weather balloon) without significant algorithm development by Radar science engineers....which the less said about Bangladesh the better. You understand why this costs 147 cr taka (20 mil USD) and not something way more like say 100 million like a green pine?
I mean an L-band vanilla radar may be a game changer considering having nothing before for BD:
http://www.leonardocompany.com/en/-/rat-31dl
But its not anything India will even notice, given Delhi gave permission to acquire it (and also why you didnt select the chinese one on offer....as loudly as you defence types say China is your biggest strategic partner blah blah).
So its a good acquisition maybe to use with Myanmar. With India the eastern sector is mostly quiet as far as our threat assessment.
And yes India will be making a visit or two and ground-verify this radar too...the regular friendly courtesy call of dada.