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TMA-MHA tetra - RF Cafe Forums
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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.
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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
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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
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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
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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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