Tait TB8100 Manual De Instalación Y Operación página 96

Figura 4.12 Ruta de la señal UHF de la estación base - Banda L
SAW
Filter
RF RF
Switch Switch LPF LPF HPF
Input* Amp
SAW
Filter
Pad
70.1MHz
Mixer Diplexer Buffer Pad XTAL
filter
Buffer RX VCO Loop filter
L1 = 781.9-783.9MHz
12.8MHz
L1 = 857.9-859.9MHz
TCXO
L2 = 825.9-831.9MHz
low 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
RF Board Digital Board
SAW
Filter Decimating
filter
Switch Switch
Demodulated
IF Receiver
SAW
audio
front end
Filter
Decimating
filter
Normalisation,
Digital FM Demod, SINAD
Anti-
IF down RSSI & SINAD processing
alias ADC
Amp converter measurement
filter
(DDC) RSSI,
processing
Σ
To RISC, DSP,
RX Synth
ADC, DDC
Loopback
RISC
40MHz VCXO Cross
Point
Switch
40MHz Synth (CPS)
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 Limiter filter
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
Path A
HPF De-emphasis Variable delay Mute switch
Σ
RX path audio processing
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
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 HPF
Hard limiter
filter
Variable delay Pre-emphasis HPF
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
L1 = 852-854MHz, and 928-930MHz
L2 = 896-902MHz (receive only)
L2 = 927-941MHz (transmit only)
**Depending on SIF type
SIF = system interface board
96 Descripción de las funciones del sistema
Reciter
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
System
Interface Board
Line Repeater AC
loopback coupling filter
Decimation
ADC EPOT
filter
Voice filter Digital audio input
Decimation
ADC EPOT
filter
Notch filter Path A
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 Conventional
RX_GATE signalling
COAX Relay
System Control bus
Amp &
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
RSSI
Buff output
voltage
Mute Unbalanced
Buff
Sw. audio output
Balanced
Mute
Buff audio
Sw.
output
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
TX_KEY
RX_GATE
buffers COAX Relay
Speaker
Vol.
Knob
Mic.
Amp.
Service Kit
PA
fan
PMU
fan
Manual de Instalación y Operación TB8100
© Tait Limited Febrero de 2014