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DAB/FM radio 'blocks' reception of station on 98.3FM

  • 08-05-2017 9:03pm
    #1
    Antenna
    Registered Users, Registered Users 2 Posts: 2,331 ✭✭✭


    The other day I had the opportunity to try out this DAB+/FM/Bluetooth radio:

    VQ Hepburn Mk II
    https://www.myvq.co.uk/shop/hepburn-mkii.html

    and was disappointed to discover that in FM mode it suffers from self-generated 'blank carriers' on 98.3 and 104.4-104.5

    Where I was in environs of Cork city it was blanking out reception of College station UCC98.3 which couldn't be received on it  (a station that broadcasts interesting documentaries it has to be said)

    A pocket radio could receive 98.3 fine, until it was brought close to this DAB+/FM radio and then suffered from sizzling interference (which disappeared when the DAB radio was switched off)

    104.4-104.5 also suffered from this self-generated interference, which as one example would degrade or obscure reception of FM104 if used in Dublin

    The interference to 98.3 (and a lesser extent 98.2)  is not unique to this DAB radio, it also occurs with at least some PURE radios. The reason 98.3MHz is hit is because a harmonic of a clock frequency used in these DAB radios falls on 98.3 MHz approx.  

    However there are other DAB/FM radios that do not suffer from the above issue, and have good performance on FM - where it seems that FM performance is more than an afterthought than on these other DAB/FM radios.


Comments

  • #2
    L1011
    Registered Users, Registered Users 2 Posts: 69,592 ✭✭✭✭L1011


    Any DAB/FM by Pure.


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