Tait TB8100 Manual De Instalación Y Operación página 95

Figura 4.11 Ruta de la señal UHF de la estación base - Bandas H y K
RF PIN RF PIN
BPF LPF
Input* switch Amp Atten. Amp
Noise RISC AGC
RISC
source Det.
RISC
70.1MHz
Mixer Diplexer Buffer Pad XTAL
Buffer RX VCO Loop filter
369.9-510.1MHz 721.9-753.9MHz
12.8MHz
H1 = high side K4 = low side
TCXO
H2 = low side
H3 = low side
H4 = high side
Change over
Ext. 10 or 12.8MHz Ref VCXO
REF Synth
Ref. (12.8MHz)
RISC
Ref detect. RISC
Buffer Ex VCO Ex Loop filter Ex Synth
RISC
Σ
PA_KEY
Exciter to
PA RF
6W Board
PIN
HPF 100mW 1W
atten.
RF
LPF
Detect
Control Board
PA_KEY ADC
AND
50W Power Amplifier
Power Management
Unit
AC Power factor
AC converter
input correction
Rear panel
ON/OFF
AC Converter Board µP
Rear
panel
Standby PS card
ON/OFF DC converter
DC µP
µP
input
10W
standby
DC Converter Board
Manual de Instalación y Operación TB8100
© Tait Limited Febrero de 2014
RF Board Digital Board
Decimating
RF
BPF Pad
Demodulated
IF Receiver
front end
AGC not fitted to
Decimating
K band reciters
Normalisation,
Digital FM Demod, SINAD
Anti-
IF down RSSI & SINAD processing
alias ADC
Amp converter measurement
filter filter
(DDC) RSSI,
processing
Σ
To RISC, DSP,
RX Synth
ADC, DDC
Loopback
RISC
40MHz VCXO
Switch
40MHz Synth
Buffer
+ coax
switch RISC
driver
12.8MHz to
Buffer
CODECs
RISC I
Frequency
LPF ADC
control loop
quadrature
Q
VCXO mixer + LPF ADC
buffers Frequency
control
VCXO
loop
modulation Σ
DAC
VCO
modulation
DAC
General I/O
60W
LPF / Directional
Board
Coupler Board
Harmonic Directional RF
6W 60W
filter coupler output
Σ
ADC ADC
DAC DAC DAC DAC
System
Control
PA bus
Fan
Microprocessor
buff.
I 2 C
System
Micro Card
I 2 C current Control
bus
PMU sources
micro- I 2 C
processor
Auxiliary PS
Fan buffer
Board
µP
40W Aux. out (SIF)
Converter
PA1/PA2 output
Reciter output
2.5A
polyfuse
µP
Standby
Isolate
Direct demodulated audio output
filter
Path A
audio HPF De-emphasis Variable delay Mute switch
Σ
RX path audio processing
filter
HPF De-emphasis Variable delay Mute switch
RISC
Path B
OTL
RISC
Rx sub-band
CTCSS
encoders
RISC
signalling
decoder
Σ
Voice reject
DCS decoder RISC
Cross
Point
(CPS)
RISC Balanced
CTCSS
RISC
encoder
Line input level
Interpolating Σ
measurements
filter Voice reject DCS
RISC
filter encoder
RISC
Unbalanced
TX sub-band signalling
TX path audio processing
Interpolating Σ
Variable delay Pre-emphasis
Limiter filter Hard limiter
filter
Variable delay Pre-emphasis
OTA
generators
Direct modulation audio input
Digital Signal Processor (DSP)
Host port
SIO
Reduced instruction
Fan buffer set computer
(RISC)
2
I C UART
Reciter
fan
*Frequency Bands & Sub-bands
H1 = 400-440MHz
H2 = 440-480MHz
H3 = 470-520MHz
H4 = 380-420MHz
K4 = Rx 792-824MHz
Tx 762-776MHz & 850-870MHz
**Depending on SIF type
SIF = system interface board
Path A (muted)
Path A (un-muted)
DAC
Path B (un-muted)
BO audio
Path B (muted) RISC
measurement
UO audio
RISC
measurement
RISC Line out test tone.
RX
Test signal
Cross
RISC
RISC Pip tones
sink
Point
Switch
Interpolation Σ
(CPS)
DAC EPOT
filter
Digital audio output
Interpolation
DAC EPOT
filter
Interpolation
filter
Interface Board
Line Repeater AC
loopback coupling filter
Decimation
ADC EPOT
filter
Voice filter Digital audio input
Decimation
ADC EPOT
filter
HPF Notch filter Path A
HPF Notch filter Path B
TX
Cross
Test Signal
Point
generator
Switch
(CPS)
RISC CWID
Third party
interface
RISC PIP tones
connections
RISC Test tone
SIO to
UART
General I/O
Discrete
Logic
DAC
ADC
TX_KEY
RX_GATE
COAX Relay
System Control bus
Amp &
Switch
Compressor
Control Panel
System
Control
bus
RS-232
converter
Speaker ON/OFF
Fan rotation
I 2 C port Control panel ID
LEDs
expanders
Keypad
Mic PTT
Descripción de las funciones del sistema
Reciter
RSSI
Buff output
voltage
Mute Unbalanced
Buff
Sw. audio output
Balanced
Mute
Buff audio
Sw.
output
System
Balanced
Buff audio
input
Unbalanced
Buff
audio input
Power
from PMU
Power to
external
equipment
Rear panel
RS-232 or
Ethernet
RS-232 or
Ethernet converter**
Digital
inputs
Digital
outputs
EPOTs
Mute Switches
SIF ID
Conventional TX_KEY
signalling RX_GATE
buffers COAX Relay
Speaker
Amp
Vol.
Knob
Mic.
Amp.
Service Kit
PA
fan
PMU
fan
95