Transcript
Terrestrial TV products
Multichannel headend
Twin TV channel amplifiers
twin TV channel amplifiers tunable in all UHF range SAW filters provide a high selectivity processing of digital and analog channels each section has a built-in AGC system and an independent regulator of output level output signal level indication allows to make quick installation built-in indicators and push buttons allow operatively to set required parameters DIN rail or wall mounting DC feeding for preamplifiers through RF input robust die-cast housing connectors: 4xRF - type F screw terminal block for DC entry power distribution bus
at420 8 MHz channel bandwidth at421 7 MHz channel bandwidth
Technical specifications
T Y P E
at420 at421
Ordering number
02558 02558MATCH
Sections
2
Tuning range of channels RF input
TV standard
channel bandwidth
level/impedance
pr.
470-862 MHz
analog (G, K, I, NZ)
DVB-T*
analog (Au/G, K, I, NZ)
8 MHz
8 MHz
7/8 MHz
7 MHz
60-85 dBµV/75 Ω
50-80 dBµV/75 Ω
60-85 dBµV/75 Ω
50-80 dBµV/75 Ω
frequency range of RF distribution 47-862 MHz
loop through gain
return loss
RF output
level/ impedance, typical
MER of DTT signal
frequency range of RF combining
DC pass through
combining through loss Terr/SAT
level adjustment range
return loss
DVB-T*
0 ± 1.5 dB >12 dB
90 dBµV/75 Ω
85 dBµV/75 Ω
90 dBµV/75 Ω
85 dBµV/75 Ω
-
≥ 36 dB (with input 38 dB)
-
≥ 36 dB (with input 38 dB)
47-2150 MHz 0.3 A 1.5/2.5 dB 0 ÷ -10 dB by 1 dB step
pr.
≥10 dB
Noise figure
8 dB
Selectivity, typical
40 dB, +1.25 MHz 40 dB, +2 MHz 40 dB, +1.25 MHz 40 dB, +2 MHz 8 MHz from channel border 8 MHz from channel border 7 MHz from channel border 7 MHz from channel border
Offset**
±1 MHz by 0.25 MHz step ≤ -60 dBc
Spurious signals level Mirror channel selectivity
≥ 60 dB
Flatness of channel bandwidth, typical
± 1.5 dB
DC feeding for external
pr.
Current consumption***
12 V 0.1 A max. 12 V 0.45 A
Operating temperature range
0o ÷ +50o C
Dimensions/Weight (packed)
198x107.5x36 mm/0.9 kg
pr. software control * 21-69 channels for at420 by G standard, 20-75 channels for at421 by Au standard ** the offset is used for fine tuning of the channel ADCh curve *** without external DC loading
