PSPのワンセグチューナーの受信感度にしょんぼり。

PSPのワンセグチューナーの受信感度にしょんぼり。室内だと全然映らず、チャンネルを変えても常時選局中。窓際でブラインドを上げると何とか受信できた。今まで窓を背中にしていたけどこれはデスクの向きを変える必要があるなぁ。外部アンテナとか買わないと駄目なのかな？Automatically translated text:WANSEGUCHUNA sensitivity of the PSP to receive crestfallen.映RAZU is no room, and constantly changing channels during the election office. I raise the blinds at the window and was received. Now back to the window, but I had to change the orientation of the desk! Need. Do I need to buy an external antenna?