FTTH CATV optical receiver
CRO-51
CRO-51 is RFTV broadcast receiver for FTTx optical fiber
networks.
This product adopts high sensitivity receiving components
and special low noise circuit.
Main product features:
z very low noise (3.8% modulation, -10dBm receive
level with CNR >45dB)
z receive optical power in range +3dBm to -12dBm
with good linearity
z inside 47 ~ 862 MHz, all have good flatness
FL=1.0dB
z metal shell, supply safeguards to opto-electrical sensing device
z high output level
z low power consumption
Specification:
Optical features
RF features
Link feature
General feature
Operation wavelength
Receiving Power
Responsivity
Optical return loss
Working bandidth
Flatness
Output level
Output level adjust
Return loss
Output impedance
RF tie-in
Test channel
OMI
CNR
CTB
CSO
HUM
Power supply
Power consume
Work. Temp.
Work. Temp.
Work. Relative hum. % 5 ~ 59
Size (W x D x H) mm 59x9x23
nm 1260-1600
dBm +3 ~ -12
A/W
dB >55
Mhz 47 ~ 862
dB +/- 1.0
dBμV 92 @ +3dBm
dB none
dB >12
Ω 75
F British
59Ch PAL-D
3.8%
dB
dB -70 @ -2dBm
dB -66 @ -2dBm
dB < -60
V DC +12V, +/- 1.0V
W Less 2W, 12V DC/100mA
o
C -20 ~ +50
o
C -40 ~ +85
1310nm >0.85
1550nm >0.90
56,6 @ -2dBm
48,5 @ -8dBm
Back panel:
PAD – attenuation control. Note: PAD control not effective in model CRO-51 (PAD effective in
model CRO-51M, CRO-51AM).
RF OUT – output connector
Front panel:
FIBER IN: SC/APC connector, input for fiber optic signal
Status indicator LOW: LED off = signal low below -13dBm
LED green = signal ok, -12dBm ~ +3dBm
LED red = too high, more than +3dBm
POWER: power input 12V DC.
Test measurement – dependency of RF output on fiber optic input power:
Power input (dBm) +3 +2 +1 0 -1 -2 -3
Vo (dBμV) 92,2 90,2 88,2 86,2 84,2 82,2 80,2
CNR (dB) 60 59 58,6 58,1 57,7 56,6 55,4
CTB (dB) 66 68 70 70 70 70 72
CSO (dB) 65 65 65 65 65 66 68
Power input (dBm) -4 -5 -6 -7 -8 -9 -10
Vo (dBμV) 78,2 76,2 74,2 72,2 68,2 66,2 64,2
CNR (dB) 53,2 51,9 50,8 49,3 48,5 46,4 45,2
CTB (dB) 70 68 68 66 65 65 64
CSO (dB) 66 65 65 65 63 63 62
Product series model:
CRO-51 without built-in magnitude PAD
CRO-51M with built-in magnitude PAD
CRO-51A with built-in 1310~1490 nm splitter
CRO-51AM with built-in 1310~1490 nm splitter and magnitude PAD
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