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HEADEND SYSTEMS
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EASY MODIFIED MODULE COSNTRUCTION.
PROGRAMMABLE MODULE.
SELECTIVITY FOR THE NEAREST NON�ADJACENT CHANNELSNOT LESS 60
dB.
AUTOMATIC GAIN CONTROL (AGC) FOR EACH CHANNEL.
AGC DEPTH 30 dB.
NUMBER OF CHANNELS UP TO 20*.
COMPUTER CONTROL AND DIAGNOSTIC FEATURE (OPTIONAL).
WEAK�SIGNAL RECEPTION MODE.
EACH CHANNEL SIGNAL LEVEL DISPLAYING.
EACH CHANNEL OUTPUT LEVEL CONTROL.
EACH INPUT BUILT�IN VARIABLE ATTENUATOR.
EACH INPUT BUILT�IN INJECTOR FOR FEEDING OF
ANTENNAAMPLIFIERS.
HEADEND SYSTEM‘PLANAR�SG3000’
Headend system SG3000 from PLANAR is intended for broadcast
signal amplifying and converting.Feature of SG3000 is the reception
channel signal transformation to the intermediate frequency(930
MHz). That allows to design channel modules in small from�factor
and programmable. UsingSAW�filters at the intermediate frequency
ensures high selectivity. SG3000 is programmed withhelp of PS24
programmer or the computer via RS232�PS24 adapter.It is possible to
control and diagnose of SG3000 parameters with help of the computer
via RS232port (optional).SG3000 contains the main block and
changeable modules.The main block contains a power supply and
output combiner 20P. Other assembly units ofSG3000 are changeable
and can be set depend on a frequency plan.
NOTE. *) Increasing the number of channels is possible while
using of the several main blocks.
Figure 2. Headend system «PLANAR�SG3000» structure
1 Channel modules.1.1 Channel amplifiers1.2 Converters2 Input
combiner modules.2.1 Input amplifiers sub�module (comes in each
combiner composition).3 Central processor module.Controls headend
programming and diagnosing processes. SG3000 has the feature to
operatewithout of the central processor module (after programming
procedure). It allows to use onecentral processor module for
several headend systems.
HEADEND «PLANAR�SG3000» CHANGEABLE MODULES COMPOSITION
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HEAD�END ‘PLANAR�SG3000’REPLACEABLE MODULES CHANNEL
1. MODULES ’PLANAR�SG3000’
Figure 3. Channel amplifier structure
Channel amplifiers K1 and K2 amplify the radio signal of one TV
channel.SPECIFICATION
SPECIFICATION
Frequency range, MHz 48-862
Number of channels united in one base block for 20
Number of inputs for 20
Input tap modules attenuation level, dB 10
Noise figure, dB, or less 7
Input level range, dBuV 60-90
Output level deviation at input level deviation in range 60-90
dBuV, dB, or less ±1
Head-end output level, dBuV 72-82
Test port output level, dBuV 60-70
Max current per one auxiliary output, mA 120
Permissible total current of auxiliary outputs, mA 300
Environment condition:temperature, о С 0 +50relative humidity at
25о С, % for 80atmospheric pressure, kPa - 86 -106
Dimensions, mm 425х280х70
Weight, kg: 3,9
К1 К2
Frequency range, MHz 48-230 470-856
Input Level, dBuV 65-95
Gain, dB, not less 35
Selectivity by the nearest non-adjacent channels, dB, not less
60
Flatness, dB, or less 2
HEADEND SYSTEM ‘PLANAR�SG3000’
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Intended for tapping the signal on 1, 2, 4 or 8 channel
modules.Each combiner is wideband.
Intended for radio signal range amplification.Input amplifier
sub�module comes with the input combiner module.
CHANNEL AMPLIFIER K2 AFR IN RANGE 50 mHz
CHANNEL AMPLIFIER K2 AFR IN RANGE 500 mHz
2. INPUT TAP MODULES’PLANAR�SG3000’
SPECIFICATION
3. INPUT AMPLIFIER SUBMODULES’PLANAR�SG3000’
SPECIFICATION
4. CENTRAL PROCESSORMODULE (СРМ)
Intended for programming and controling of the headend
diagnosing process.The software update is made trough the website
of the manufacturer.Completed COM port cable (optional).
Input tap model 1Р 2Р 4Р 8Р
Number of outputs 1 2 4 8
Gain, dB (with input amplifier submodule) 3 3 3 1
Input amplifier model А1 А2
Frequency range, MHz 48-230 470-856
Gain, dB 5
HEAD�END ‘PLANAR�SG3000’ REPLACEABLE MODULES CHANNEL
