Televes 2333 User manual
www.televes.com
Optical Fiber Transmitter and Receiver
with return path channel
EN User manual
Refs. 2333, 233310
2334, 233410
234304, 234310
2335, 2336
ENGLISH
EN
Index
1. Technical specifications ...................................................................................................................... 5
2. Reference description ......................................................................................................................... 9
3. Mounting ............................................................................................................................................. 10
3.1. Wall mounting .............................................................................................................................. 10
3.2. 19” rack mounting ...................................................................................................................... 11
4. Element description ............................................................................................................................ 12
4.1. Optical transmitter ................................................................................................................... 12
4.2. Optical receiver ......................................................................................................................... 13
4.3. Power supply unit ..................................................................................................................... 14
5. Examples of application ..................................................................................................................... 15
6. Tables for attenuation and gain installations calculation .................................................................... 19
Optical Fiber Transmitter and Receiver
Optical Fiber Transmitter and Receiver 4
Important safety instructions:
General installation conditions:
Before handling or connecting the equipment,
please read this manual.
Do not obstruct the equipment’s ventilation
system.
Please allow air circulation around the
equipment.
Do not place the equipment near sources of heat
or in excessively moisture conditions.
Do not place the equipment where it may be
aected by strong vibrations or knocks.
How to use the equipment safely:
If any liquid or object falls inside the equipment,
please contact a specialized technician.
Do not connect the equipment until all the other
connections have been made.
Instructions for the optical
connection:
For the optical connection, a single mode bre
cable is used with an SC/APC-type connector.
Remove the dust cap from the optical connector
located on the front panel, as well as the one
of the connector of the single mode ber to be
connected to the equipment.
Connect the cable to the device, carefully
slotting the guides together for both connectors,
pushing the connector all the way in.
Precautionary measures with the
connection point:
Take special care to avoid damaging the
unprotected ends of the connectors, as small
scratches, impurities and/or particles of dirt, oil,
grease, sweat etc. may signicantly aect the
quality of the signal.
To clean the ends of the connectors, wipe with
an appropriate cleaning wipe moistened with
isopropyl alcohol, specic for the cleaning
of optical elements. Make sure the alcohol
evaporates fully before connecting.
Keep the connector covers and cable caps in a
safe place in case they are needed in the future.
Always t the covers on the connectors of devices
that are not connected to cables to prevent the
laser beam from damaging the eyes.
Avoid turning on the transmitter without having
the bre optic cable connected.
Safety measures
Warning.-
This product emits an invisible laser beam. Avoid
contact with laser radiation. The use of equipment
such as binoculars or magnifying glasses may
increase damage caused to the eyes.
According to EN60825-1_ 2007
Caution
- The use of controls or adjustments, or procedures
other than those specied in this manual may
result in exposure of body parts to harmful
radiation.
- Carefully read and observe the instructions given
in this manual, and keep it for future reference.
- Do not use the equipment in any way that does
not comply with the operating instructions or
in any conditions that exceed the stipulated
atmospheric specications.
- This equipment is not user-serviceable. Should
you require assistance, contact our technical
service department.
- Never point the laser beam intentionally at
people or animals.
EN
5
1. Technical specifications
Optical transmitters 2333 233310 2334 233410 234304 234310
RF
Input/Output
Frequency range Forward channel MHz 87 - 2150
Return channel ---- 1 - 65 ----
Maximum input level for
CSO & CTB >= 60dB (1)
87-862 MHz dBµV 91 87 91 87 85 87
950-2150 MHz 80
Input level regulation margin (in 2 dB steps) dB 0-18
Output level regulation margin (in 2 dB steps) dB ---- 0-18 ----
Return channel maximum RF output level dBµV 112 (2)
Equivalent input noise EIN 850 MHz dBm/Hz -150
2000 MHz - 146
Flatness dB ± 1,5
Return losses dB >= 10
Impedance ohm 75
Test socket attenuation (typ.) dB 16
Optical output
(forward channel)
Laser type MQW-DFB
Wavelength nm 1310 ± 20 1550 ± 20
Output optical power mW/dBm 4 / 6 10 / 10 4 / 6 10 / 10 2,5 / 4 10 / 10
Optical input
(return channel)
Optical device type ----
InGaAs Pin Photodiode
----
Wavelength nm ---- 1200 -1600 ----
Detection bandwidth MHz ---- 1 - 3000 ----
Max. Optical power received mW/dBm ---- 2 / 3 ----
General
Powering/Consumption 12 Vdc mA 210 270 310 330 265 325
24 Vdc 104 140 160 170 140 160
RF connectors type female F
Optical connectors SC/APC
Operating temperature ºC -5 ··· +45
Weight grs. 850 900 850
Dimensions mm 50 x 217 x 175
(1) Input: 41 TV CH CENELEC and 1 complete satellite transponder. The input attenuator in 0dB position.
(2) Measurement made according to standard DIN45004B.
Optical Fiber Transmitter and Receiver 6
Optical receivers 2335 2336
RF
Input/Output
Frequency range Forward channel MHz 87 - 2150
Return channel ---- 1 - 65
Maximum Output Level for CSO and CTB >= 60dB (1) 87-862 MHz dBµV 93
950-2150 MHz 90
Output level regulation margin (in 2 dB steps) dB 0 - 18
Maximum input level return path (2) dBµV ---- 95
Equivalent input noise of the return channel, measured at 30 MHz and the
transmitter output connected directly to the receiver dBm/Hz -152,5
Flatness dB ± 1,5
Return losses dB >= 11
Impedance ohm 75
Optical input
(forward channel)
Optical device type InGaAs Pin Photodiode
Wavelength nm 1200 -1600
Detection bandwidth MHz 1 - 3000
Maximum Optical power received mW/dBm 4 / 6
Optical output
(return channel)
Laser tipo ---- Fabry-Perot
Wavelength nm ---- 1310 ± 20
Maximum output power mW/dBm ---- 2 / 3
General
Powering/Consumption 12 Vdc mA 300 355
24 Vdc 155 175
RF connectors type female F
Optical connectors SC/APC
Operating temperature ºC -5 ··· +45
Weight grs. 850 900
Dimensions mm 50 x 217 x 175
(1) Output: 42 TV CH CENELEC and 1 complete satellite transponder. The output attenuator in 0dB position.
(2) According to DIN45004B.
EN
7
Amplier
5575
Frequency range 46 ... 862 MHz Connector type “F”
Gain 44 ± 2,5 dB Powering 24 V
Regulation margin 20 dB Consumption at 24 V : 450 mA
Output level (at 60 dBc): 105 dBµV (42 CH CENELEC) Test socket -30 dB
Power Supply Unit
5629
Mains voltage 196 - 264 V~ 50/60 Hz Total max. current
(output1 + output2): 5 A (24V )
Output voltage 24V Max. current per output 4 A (24V )
1.5. Ampliers technical specications
1.6. Technical specs. Power Supply Unit
1.7. Blocks diagrams
Diplexer
Fwd path / Rtn
path
RF INPUT
(forward path)
RF OUTPUT
(return path)
Attenuator
Forward path
Converter
RF FO
Forward path
Control
LED Relay
Attenuator
Return path Return path
Converter
RF FO
FO INPUT
Return path
Return path
Control
LED Relay
FO OUTPUT
Forward path
PWR PWR
ref. 2333
ref. 233310
ref. 234304
ref. 234310
ref. 2334
ref. 233410
ref. 2333
ref. 233310
ref. 234304
ref. 2334
ref. 233410
ref. 234310
ref. 2334
ref. 233410
2333
233310
234304
234310
2334
233410
Optical Fiber Transmitter and Receiver 8
Diplexer
Fwd path / Rtn path RF OUTPUT Fwd path
RF INPUT Rtn path
Converter
FO RF
Return path
control
LED Relay
Forward path
attenuator
Forward path
Converter
FO RF
FO OUTPUT
Return path
ref. 2336
ref. 2335
ref. 2336
Forward path
control
LED Relay
FO INPUT
Forward path
2335
PWR
2336
PWR
ref. 2335
ref. 2336
EN
9
2. Description of references
Product range
2333 T.0X Optical ber transmitter 1310 nm
233310 T.0X Optical ber transmitter 1310 nm 10dBm
2334 T.0X Optical ber transmitter 1310 nm + Return channel receiver
233410 T.0X Optical ber transmitter 1310 nm 10dBm + Return channel
receiver
234304 T.0X Optical ber transmitter 1550 nm 4dBm
234310 T.0X Optical ber transmitter 1550 nm 10dBm
2335 T.0X Optical ber receiver 1200-1600 nm
2336 T.0X Optical ber receiver + Return channel transmitter
2337 T.0X 2 way optical splitter
2339 T.0X 4 way optical splitter
234401 T.0X 8 way optical splitter 1310/1550 nm 10dB
234501 T.0X 16 way optical splitter 1310/1550 nm 14dB
234601 T.0X 32 way optical splitter 1310/1550 nm 17dB
5629 T.0X Power Supply Unit 24V/5A
Accessoires
7234 Universal programmer
5071 Wall mounting rail T03-T05-T.0X L=50 cm
5239 Wall mounting rail T03-T05-T.0X (12 modules +PSU) L= 56 cm
5301 19” rack frame
507202 T.0X cabinet with ventilation unit (7 modules + PSU)
4061 F terminal load DC-blocked
4058 F terminal load
422601 T05 to T.0X powering adapter lead L=40 cm
422602 T05 to T.0X BUS adapter lead L=40 cm
422603 Control BUS lead T.0X L=1 m
5673 Face plate 50 mm
Optical Fiber Transmitter and Receiver 10
UQQA-S2-T
UQQA-S2-T
UQQA-S2-T
UQQA-S2-T
UQQA-S2-T
UQQA-S2-T
TEST
(-12dB)
RF
TX OPTICAL PWR
RF IN
LEVEL
ADJ.
ALARM
PWR
TX
CLAC!
3. Mounting
3.1. Wall mounting
NOTE: We recommend using both outputs of the source, balancing consumption.
F.O. transmitter
4061
5071
5239
T.0X Headend
5629
Optical
output
EN
11
3.2. 19” rack mounting
UPSU120
UQQA-S2-T
UQQA-S2-T
UQQA-S2-T
UQQA-S2-T
UQQA-S2-T
UQQA-S2-T
TEST
(-12dB)
RF
TX OPTICAL PWR
RF IN
LEVEL
ADJ.
ALARM
PWR
TX
5301
Optical Fiber Transmitter and Receiver 12
4. Description of elements
4.1. Optical transmitter
1. Test output (-16dB)
2. RF Input
87 - 2150 MHz (forward channel)
5 - 65 MHz (return channel)
3. Powering
4. ON power indicator LED
5. Forward channel power indicator LED
6. Return channel power indicator LED
7. Alarm connector
8. Forward channel optical output
9. Return channel optical input
10. Forward channel RF attenuation
11. Return channel RF attenuation
Caution
The use of control or adjustment devices, or operating parameters
other than those specied in this manual, can cause exposure to
harmful radiation.
LED ON Indicates
TX Optical PW
Optical power delivered by the equipment from:
(5,5 & 6,5 dBm => refs. 2333 & 2334)
(9,5 & 10,5 dBm => refs. 233310 & 233410)
(3,5 & 4,5 dBm => refs. 234304 & 234310)
RX Optical PW Optical level received by the return channel from
3 dBm to -7 dBm.
Masa +12 ... 24V
Ref. 2333
Ref. 233310
Ref. 234304
Ref. 234310
Ref. 2334
Ref. 233410
exposure to harmful radiation
EN
13
4.2. Optical receiver
1. Powering
2. ON power indicator LED
3. Forward channel power indicator LED
4. Return channel power indicator LED
5. Alarm connector
6. Return channel optical output
7. Forward channel optical input
8. Forward channel attenuation
9. RF output
87 - 2150 MHz (forward channel)
5 - 65 MHz (return channel)
Caution
The use of control or adjustment devices, or operating parameters
other than those specied in this manual, can cause exposure to
harmful radiation.
RF
TX OPTICAL PWR
RF OUT
LEVEL
ADJ.
ALARM
PWR
RX OPTICAL PWR
TX
RX
RF
RX OPTICAL PWR
RF OUT
LEVEL
ADJ.
ALARM
PWR
RX
2
1
4
7
6
8
2
1
9
3
5
4
5
8
9
7
Ref. 2335 Ref. 2336
LED ON Indicates
RX Optical PW Input optical power on the device from 5
dBm and -10 dBm.
TX Optical PW Optical level broadcast on the return chan-
nel between 2.5 dBm and 3.5 dBm.
Masa +12 ... 24V
Optical Fiber Transmitter and Receiver 14
4.3. Power Supply Unit
Input power
connectors (1)
Status LED
(1)
Mains input
230V~
NOTE: You must use both outputs of the source when consumption exceeds 4 amps on either of them (maximum current for each output)
24V: OK
0V: Overloading or shortcircuiting
Masa
EN
15
5. Examples of application
Correct use of the devices.
There are several basic concepts that should not be
forgotten. The technical specications are a set of
maximums to be handled with some care.
To calculate the RF level which must excite the
transmitter, use the data in the table shown below
and the following formulas:
EIN= EINn +10×log(BW) [1]
C/N=Vin - EIN [2]
where:
• EIN is the equivalent input noise. That is, the
noise in RF, which would have to be present
at the input of the transmitter in an ideal
optic system that did not add noise, so as to
obtain the same level of noise at the output
of the receiver of the real system (It always
add noise).
• EINn is the EIN for a bandwidth of 1Hz.
• BW is the bandwidth of the RF signal.
• Vin is the RF input level, and is given in dBm.
Here are some examples.
Opt. Link
atenuattion
(dB)
Gain
at 870 MHz
(dB)
EINn
(dBm/Hz)
Gain
at 1.5 GHz
(dB)
EINn
(dBm/Hz)
Gain
at 2.15 GHz
(dB)
EINn
(dBm/Hz)
0 16.2 -150.4 17.0 -150.4 17.4 -146.4
2 12.3 -148.4 13.13 -148.9 13.4 -145.7
4 8.7 -146.6 9.4 -147.0 9.7 -144.9
4.5 7.7 -145.85 8.4 -146.3 8.7 -144.6
5 6.6 -144.9 7.4 -145.6 7.7 -144.2
5.5 5.6 -144.1 6.4 -144.8 6.7 -143.7
6 4.6 -143.3 5.4 -144.1 5.7 -143.2
6.5 3.6 -142.5 4.4 -143.2 4.7 -142.7
7 2.6 -141.6 3.4 -142.4 3.7 -142.1
7.5 1.6 -140.8 2.4 -141.6 2.7 -141.5
8 0.6 -139.9 1.4 -140.7 1.7 -140.8
8.5 -0.3 -139.1 0.4 -139.8 0.7 -140.1
9 -1.3 -138.2 -0.5 -139.1 -0.3 -139.4
9.5 -2.3 -137.25 -1.5 -138.1 -1.3 -138.7
10 -3.3 -136.35 -2.5 -137.2 -2.2 -138.0
10.5 -4.3 -135.4 -3.5 -136.3 -3.2 -137.2
11 -5.3 -134.5 -4.5 -135.5 -4.3 -136.3
11.5 -6.3 -133.5 -5.5 -134.47 -5.3 -135.5
12 -7.3 -132.55 -6.5 -133.5 -6.3 -134.6
12.5 -8.3 -131.6 -7.5 -132.57 -7.3 -133.7
13 -9.3 -130.6 -8.5 -131.6 -8.3 -132.8
13.5 -10.3 -129.7 -9.5 -130.65 -9.3 -131.9
14 -11.3 -128.7 -10.5 -129.67 -10.3 -131.0
14.5 -12.3 -127.7 -11.5 -128.7 -11.3 -130.1
15 -13.3 -126.7 -12.5 -127.7 -12.3 -129.2
15.5 -14.3 -125.8 -13.5 -126.7 -13.3 -128.2
16 -15.3 -124.8 -14.5 -125.7 -14.3 -127.3
16.5 -16.3 -123.8 -15.5 -124.8 -15.3 -126.3
17 -17.3 -122.8 -16.5 -123.8 -16.3 -125.4
Measurements made with a transmitter that delivers 6.1 dBm, followed by a reel of ber of 5 km long and an optical attenuator
connected between the end of the reel of ber and optical receiver input.
Optical Fiber Transmitter and Receiver 16
link in the value of 0.6 dB, which would correspond
EINn =-139.9 dB/Hz.
Apply the formula [1] and we obtain:
EINTV= -139.9 + 10×log(5×106)= -72.91 dBm
Now apply the formula [2] to calculate the C/N, as
follows:
C/NTV=Vin - EINTV
C/NTV = -26 dBm -(- 72.9 dBm) = -26+72.9
Then, C/NTV = 46.9 dB
In practice, having satellite channels,
simultaneously with the TV ones, makes the latter
worse their C/N in 1 dB.
Example 1
Calculate the C / N at the output of the optical
receiver (C/N of the link), in the installation of the
gure below:
This is a link where the optical signal is split
between 4 bers of 1 km, using a splitter ref. 2339.
The signal received at the other end is converted
back to RF by means of the optical receiver ref.
2335.
The channel levels that excite the transmitter are:
- 83 dBµV (-26 dBm 42CH CENELEC) analog
channels, TV band.
- 73 dBµV (-36 dBm) digitales channels, SAT band.
Analog terrestrial channel bandwidth: 5 MHz
Satellite digital transponder bandwidth: 27 MHz
On the other hand:
• 1 km optical ber is equivalent to 0.4 dB of
attenuation.
• The splitter features 6.8 dB loss.
• The 2 ber optic connectors represent 0.8 dB (2
× 0.4).
Therefore, total losses of the optical ber link are:
FO losses+Optical splitter losses+Connectors losses
This is: 0.4 + 6.8 + 0.8 = 8 dB
Now we use the formulas and data given in the
table above.
For the TV band, we consider the column of the
Gain at 807 MHz. This column intersects with the
row of 8 dB of loss calculated for the optical ber
INPUT
signal
TV + SAT
RF signal
TV + SAT
1 Km
RF signal
TV + SAT
RF signal
TV + SAT
RF signal
TV + SAT
(1)
(2)
(4)
(3)
EN
17
For the TV band, in the column Gain at 807 MHz
EINn (TV)= -122.8 dBm/Hz
G(807 MHz)= -17.3 dB
And for SAT band, look in the Gain at 2.1 GHz
column.
EINn(SAT) = -125.4 dBm/Hz
• The 2 ber optic connectors represent 0.8 dB.
Therefore, the total losses of the ber optics are:
0.4 + 16 + 0.8 = 17.2 dB
(let’s take 17 dB for this case, maximum value
shown in the table)
The table provides the following information:
Now we do the calculation for digital satellite
channels, following the same process above, but
by looking at the column Gain at 2 .1 GHz of the
table (band in which are delivered digital channels)
and the following results :
EINn= -140.8 dB/Hz
EINSAT = -140.8 + 10×log(27×106) = - 65.7 dBm
As the input level is -36 dBm, C/N is:
C/NSAT = -36-(-65.7) = -36 + 65.7
C/NSAT = 29.7 dB
Example 2
Let’s repeat the example above but applied to an
installation with a 32 output optical splitter. The
channels will be digital only.
Thus, the TV channels will be COFDM channels
with a C/NCOFDM = 23 dB.
SAT channels will be DVB-S2, with a
C/NDVBS2= 14 dB.
The level of excitation of the transmitter will be
the same for TV and SAT: 79 dBµV (-30dBm).
The bandwidth will be now:
For COFDM: BW = 8×106 Hz (8 MHz)
For SAT: BW = 27×106 Hz (27 MHz)
As in Example 1, the attenuations are:
• 1 km of ber is 0.4 dB.
• The 32 output optical splitter represents about
16 dB
INPUT
signal
TV + SAT
RF signal
TV + SAT
(1)
(2)
(32)
1 Km
RF signal
TV + SAT
RF signal
TV + SAT
Optical Fiber Transmitter and Receiver 18
RETURN CHANNEL
For the return channel transmitter, the table of
attenuations, link gain and equivalent noise is:
Link attenuation
(dB)
Gain at 30 MHz
(dB)
EINn
(dBm/Hz)
0 23 -152.5
3 16.6 -149.5
4 14.6 -147.6
5 12.7 -145.7
6 10.7 -143.9
7 8.7 -141.9
8 6.7 -140
9 4.7 -138.1
10 2.6 -136
11 0.4 -133.4
12 -1.5 -132
13 -3.5 -130.5
14 -5.5 -128.5
Measurements made with a transmitter that delivers 2.9dBm
followed by an optical attenuator connected between the
transmitter and the optical receiver.
Use the formulas 1 and 2 for making calculations.
The calculation process is the same as in the case
of the forward channel.
G(2.1 GHz)= -16.3 dB
Therefore, the RF signal level delivered by the
receiver is:
Vout rcvr (dBµV) = Vin xmtr (dBµV) + G (dB)
This is:
Vout rcvr TERR (dBµV) = 79 -17.3 = 61.7 dBµV
Vout rcvr SAT (dBµV) = 79 -16.3 = 62.7 dBµV
Applying the formula [1]:
EINTV = EINn(TV) + 10×log(8×106) [dBm]
EINTV = -122.8 + 69
EINTV = -53.8 dBm
And by the formula [2] is obtained:
C/N TV= - 30 dBm - (- 53.8 dBm) = 23.8 dB en TV
Likewise, we calculate the C/N for SAT channels,
resulting in:
EINSAT= - 51.1 dBm
C/NSAT= -30 - (-51.1) = 21.1 dB en SAT
If we estimate the value of the C / N for TV very
tight, you can increase the excitement level of the
transmitter a couple of dB, since there is enough
margin before the system begins to distort.
EN
19
Opt. Link
atenuattion
(dB)
Popt IN in RX
(dBm)
Gain
at 870 MHz
(dB)
EINn
(dBm/Hz)
Gain
at 1.5 GHz
(dB)
EINn
(dBm/Hz)
Gain
at 2.15 GHz
(dB)
EINn
(dBm/Hz)
0 6 16,2 -150,4 17 -150,4 17,4 -146,4
2 4 12,3 -148,4 13,13 -148,9 13,4 -145,7
4 2 8,7 -146,6 9,4 -147 9,7 -144,9
4,5 1,5 7,7 -145,85 8,4 -146,3 8,7 -144,6
5 1 6,6 -144,9 7,4 -145,6 7,7 -144,2
5,5 0,5 5,6 -144,1 6,4 -144,8 6,7 -143,7
6 0 4,6 -143,3 5,4 -144,1 5,7 -143,2
6,5 -0,5 3,6 -142,5 4,4 -143,2 4,7 -142,7
7 -1 2,6 -141,6 3,4 -142,4 3,7 -142,1
7,5 -1,5 1,6 -140,8 2,4 -141,6 2,7 -141,5
8 -2 0,6 -139,9 1,4 -140,7 1,7 -140,8
8,5 -2,5 -0,3 -139,1 0,4 -139,8 0,7 -140,1
9 -3 -1,3 -138,2 -0,5 -139,1 -0,3 -139,4
9,5 -3,5 -2,3 -137,25 -1,5 -138,1 -1,3 -138,7
10 -4 -3,3 -136,35 -2,5 -137,2 -2,2 -138
10,5 -4,5 -4,3 -135,4 -3,5 -136,3 -3,2 -137,2
11 -5 -5,3 -134,5 -4,5 -135,5 -4,3 -136,3
11,5 -5,5 -6,3 -133,5 -5,5 -134,47 -5,3 -135,5
12 -6 -7,3 -132,55 -6,5 -133,5 -6,3 -134,6
12,5 -6,5 -8,3 -131,6 -7,5 -132,57 -7,3 -133,7
13 -7 -9,3 -130,6 -8,5 -131,6 -8,3 -132,8
13,5 -7,5 -10,3 -129,7 -9,5 -130,65 -9,3 -131,9
14 -8 -11,3 -128,7 -10,5 -129,67 -10,3 -131
14,5 -8,5 -12,3 -127,7 -11,5 -128,7 -11,3 -130,1
15 -9 -13,3 -126,7 -12,5 -127,7 -12,3 -129,2
15,5 -9,5 -14,3 -125,8 -13,5 -126,7 -13,3 -128,2
16 -10 -15,3 -124,8 -14,5 -125,7 -14,3 -127,3
16,5 -10,5 -16,3 -123,8 -15,5 -124,8 -15,3 -126,3
17 -11 -17,3 -122,8 -16,5 -123,8 -16,3 -125,4
Measurements made with a transmitter that delivers 6.1 dBm, followed by a reel of ber of 5 km long and an optical attenuator
connected between the end of the reel of ber and optical receiver input.
6. Tables for attenuation and gain installations calculation
Link attenuat.
(dB)
Gain at 30 MHz
(dB)
EINn
(dBm/Hz)
0 23 -152,5
3 16,6 -149,5
4 14,6 -147,6
5 12,7 -145,7
6 10,7 -143,9
7 8,7 -141,9
8 6,7 -140
9 4,7 -138,1
10 2,6 -136
11 0,4 -133,4
12 -1,5 -132
13 -3,5 -130,5
14 -5,5 -128,5
Measurements made with a transmitter that delivers
2.9dBm followed by an optical attenuator connected
between the transmitter and the optical receiver.
Refs. 2333, 2334 (TRANSMISSION) Ref. 2334 (RETURN)
Optical Fiber Transmitter and Receiver 20
Opt. Link
atenuattion
(dB)
Popt IN in RX
(dBm)
Gain
at 870 MHz
(dB)
EINn
(dBm/Hz)
Gain
at 1.5 GHz
(dB)
EINn
(dBm/Hz)
Gain
at 2.15 GHz
(dB)
EINn
(dBm/Hz)
6 4 7,5 -144,8 8,1 -144,1 6,7 -142,7
6,5 3,5 6,5 -144,2 7,1 -143,6 5,7 -142,4
7 3 5,5 -143,5 6,1 -143,1 4,7 -142
7,5 2,5 4,5 -142,6 5,1 -142,6 3,7 -141,7
8 2 3,5 -142 4,1 -142,1 2,7 -141,2
8,5 1,5 2,5 -141,3 3,1 -141,4 1,7 -141
9 1 1,5 -140,5 2,1 -140,8 0,7 -140,5
9,5 0,5 0,5 -139,8 1,1 -140,2 -0,3 -140
10 0 -0,5 -139 0,1 -139,5 -1,3 -139,2
10,5 -0,5 -1,5 -138,2 -0,9 -138,7 -2,3 -138,9
11 -1 -2,5 -137,4 -1,9 -138,1 -3,3 -138,3
11,5 -1,5 -3,5 -136,5 -2,9 -137,3 -4,3 -137,7
12 -2 -4,5 -135,8 -3,9 -136,6 -5,3 -137
12,5 -2,5 -5,5 -134,8 -4,9 -135,5 -6,3 -136,2
13 -3 -6,5 -133,9 -5,9 -134,7 -7,3 -135,4
13,5 -3,5 -7,5 -132,9 -6,9 -133,6 -8,3 -134,5
14 -4 -8,5 -132,1 -7,9 -132,8 -9,3 -133,7
14,4 -4,5 -9,5 -131,2 -8,9 -132 -10,3 -133
15 -5 -10,5 -130,2 -9,9 -131,1 -11,3 -132,2
15,5 -5,5 -11,5 -129,4 -10,9 -130,1 -12,2 -131,5
16 -6 -12,5 -128,4 -11,9 -129,3 -13,3 -130,6
16,5 -6,5 -13,5 -127,5 -12,9 -128,4 -14,3 -130
17 -7 -14,5 -126,6 -13,9 -127,6 -15,3 -129
17,5 -7,5 -15,5 -125,7 -14,9 -126,6 -16,3 -128,1
18 -8 -16,5 -124,7 -15,9 -125,6 -17,3 -127,3
18,5 -8,5 -17,5 -123,6 -16,9 -124,7 -18,3 -126,2
19 -9 -18,5 -122,6 -17,9 -123,7 -19,3 -125,3
Measurements made with a transmitter that delivers 10 dBm, followed by a reel of ber of 5 km long and an optical attenuator
connected between the end of the reel of ber and optical receiver input.
Refs. 233310, 233410 (TRANSMISSION) Ref. 233410 (RETURN)
Link attenuat.
(dB)
Gain at 30 MHz
(dB)
EINn
(dBm/Hz)
0 23 -152,5
3 16,6 -149,5
4 14,6 -147,6
5 12,7 -145,7
6 10,7 -143,9
7 8,7 -141,9
8 6,7 -140
9 4,7 -138,1
10 2,6 -136
11 0,4 -133,4
12 -1,5 -132
13 -3,5 -130,5
14 -5,5 -128,5
Measurements made with a transmitter that delivers
2.9dBm followed by an optical attenuator connected
between the transmitter and the optical receiver.
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