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Below are all of the forum threads, including all the responses to the original posts. tomsk45 Post subject: TMA-MHA tetra Posted: Wed Jul 12, 2006 5:52 pm Lieutenant Joined: Wed Jul 12, 2006 5:26 pm Posts: 3 Where should the values lie? Parameter for the good RX/TX TMA. RX 380-385, TX 390-395 Noise OIP3 P1dB RX Rejection TX Rejection Time Delay Bypass-loss Insertion-Loss Intermodulation Ripple in Rx-band Gain variation over temperature Duplexer 70dB for 5MhZ is okay? Bandpass Ripple Speed max 350kmh Tetra 380MHz (25kHz), Power Handling max. 8x45dBm, Gain 15-20dB, BTS Sensity static -119dBm, Mine english is very bad, apology. Top nubbage Post subject: TMA-MHA tetraPosted: Thu Jul 13, 2006 6:21 am General Joined: Fri Feb 17, 2006 12:07 pm Posts: 218 Location: London UK Hi Tomsk Check out specs for eqipment by Tait (of New Zealand), Motorola (who now no longer supply to Europe due to RoHS) and Nokia/EADS Looking at your list, a main concern would be IP3 products for 8 channels running 45dBm Tx output one one mast. Check out these combos by going thru all possible 2*F2-F1 combinations looking for any IP3 products that fall in the receive part of the band. Other parameters should drop out of manufacturers specs Top tomsk45 Post subject: Posted: Thu Jul 13, 2006 7:32 am Lieutenant Joined: Wed Jul 12, 2006 5:26 pm Posts: 3 That is not exactly the point, I knows (has) manufacturers of values, and I must have a good TMA. Therefore where the parameters are to lie in sentence by sentence? Me would help also the parameters of Motorola or R&S TMA. thanks Top tomsk45 Post subject: zolotarev?Posted: Wed Aug 16, 2006 4:29 am Lieutenant Joined: Wed Jul 12, 2006 5:26 pm Posts: 3 would it be better if one by means of the LPZ470 (http://www.profilant.net/uk/combiner/12070500) everything cuts off upward? thank you Top nubbage Post subject: TMA-MHA tetraPosted: Thu Aug 17, 2006 6:07 am General Joined: Fri Feb 17, 2006 12:07 pm Posts: 218 Location: London UK You need to consult the TETRA Specifications published by ETSI They are complicated but contain all the details you requested. Posted 11/12/2012 | ||||||
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