The UHF passthrough socket

hi, on my freeview HDR Fox box I routed the uhf cables at the back to the passthrough UHF male and female sockets . Then i was trying to tune in my DVB-T2 on my samsung TV with its built in tuner but it was not findind all the stations. when I went in on the TV tuner's signal checker the signal was terribly poor.
I then took out the UHF cables at the back of the HDR Fox T2 and joined them together and tried re-tuning the DVB-T channels again and this time it found them all and signal meter was showing good.

has anyone else had that problem at all where the HDR Fox UHF passthrough sockets at the back are attenuating the signal to the UHF or is it just mine that has a problem ?
 
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