BEST receiver experience: general
architecture, design and integration
Federico Perini, Germano Bianchi, Marco Schiaffino, Jader Monari
INAF-IRA (I)
BEST-2 Front-End
BEST-3lo Front-End
NF=1.35dB@180MHz,
Tn=105K@180MHz
Gain=50dB
OIP3= +25 dBm
Good repeatability!
NF=0.45dB Tn=32K Gain=60dB
BW=16MHz@408MHz OIP3>+33dBm
Input RL>15dB Output RL>15dB Power
Supply=10-15Volt@=245mA
BEST-2 receivers box
BEST-2
408MHz
1 Front-End and 1 Optical
Transmitter mounted inside
a waterproof box.
Best-2
Opt. Tx.
assembly
Opt. Tx.
FM Band stop filter
Low pass (TV stop)
Switchable filter bank:
- 110-250MHz
- 130-160 MHz
-170-210MHz
- 200-240MHz
- 110-150MHz
- 140-180MHz
- 200-225MHz
- 210- 250MHz
BEST-3lo receivers box
BEST-3lo
120-240MHz
A 3U / 42Hp subrack
equipped with 2 Optical
Tx, 2 F.E., 1 uC board
and 1 power supply
board) mounted inside a
waterproof box.
Opt. Rx.
=1310nm NF=36dB Gain=-25dB
BW=(0.1-1)GHz, IIP3>+33dBm,
Input RL>15dB Output RL>20dB,
Power Supply=(12-15)Volt@75mA
BEST-3lo
Opt. Tx. assembly
with anti-vibrations
system
BEST-2
IF+Rx subrack
Optical
fibre
BEST-2
IF+Rx board
BEST-3lo
IF+Rx subrack
LO
distributor
Optical
fibre
BEST-3lo
Rx board
IP3 products 10dB under the thermal noise
level KTB  IIP3 > -60dBm
IF=30MHz, OL=378MHz
Pin_ADCBW=-40/-30dBm (ADC Berkeley)
PinKTB=-107dBm (Tb=20K) /-100dBm
(Tb=500K)  Gain=90dB, GainRX=35dB
BEST-3lo RX
IF
Carrier
Board
Opt. Rx
RF/IF=110-240MHz Gain=50dB,
Dig. Att. 31.5/0.5dB
OIP3>+38dBm