Televes 2333, 2335, 2336, 2334, T.0X 2333 User Manual

Refs. 2333, 2334

2335, 2336

www.televes.com

Optical Fiber Transmitter and Receiver

with return path channel

EN

User manual

ENGLISH

EN

Index

1. Technical specifi cations ...................................................................................................................... 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

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

a ected 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 protective cover from the optical

connector on the front panel of the device, and
the cap on the connector of the single  bre
cable.

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 signi cantly a ect the
quality of the signal.

To clean the ends of the connectors, gently rub

with a lint-free lens cleaning cloth, dampened
using additive-free isopropyl alcohol. 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.

LASER APERTURE

Invisible laser radiation.

Do not watch directly with

optical instruments.

Class 1M laser product.

According to EN60825-1_ 2007

Caution

- The use of controls or adjustments or any
other procedures other than those speci ed in
this manual may lead to exposure 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 speci cations.

- 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 specifi cations

Optical transmitters refs. 2333, 2334

RF
Input/Output

Frequency range

Forward channel

MHz

87 - 2150

Equivalent input noise EIN

850 MHz

dBm/Hz

-150.7

Return channel

(3)

1 - 65 2000 MHz - 145.8

Max. input level for CSO & CTB >=
60dB

(1)

)

87-862 MHz

dBμV

91 Flatness dB ± 1.5

950-2150 MHz 80 Return losses dB >= 10

Input level regulation margin (in 2 dB steps)

dB 0-18 Impedance ohm 75

Output level regulation margin (in 2 dB steps)

(3)

Return channel maximum RF output level dBμV 112

(2)

Test socket attenuation (typ.) dB 16

Optical output
(forward channel)

Laser type MQW-DFB

Output optical power mW/dBm 4 / 6

Wavelength nm 1310 ± 20

Optical input
(return channel)

(3)

Optical device type

InGaAs Pin

Photodiode

Detection bandwidth MHz 1 - 3000

Wavelength nm 1200 -1600 Max. Optical power received mW/dBm 2 / 3

General

Powering/Consumption

12 Vdc

mA

210 310

(3)

RF connectors

type

female F

24 Vdc 104 160

(3)

Operating temperature ºC -5 ··· +45 Optical connectors SC/APC

(1) I nput: 41 T V CH CENELEC and 1complete satellite transponder. The input attenuator in 0dB position.
(2) M easurement made according to standard DIN45004B.
(3) Only ref. 2334.

Optical Fiber Transmitter and Receiver

6

RF
Input/Output

Frequency range

Forward channel

MHz

87 ··· 2150

Equivalent input noise of the return channel,
measured at 30 MHz and the transmitter
output connected directly to the receiver

dBm/Hz -152.5Return channel

(3)

1 ··· 65

Max. Output Level for CSO and
CTB> = 60dB

(1)

)

87-862 MHz

dBμV

93

950-2150 MHz 90 Flatness dB ± 1.5

Output level regulation margin (in 2 dB steps) dB 0-18 Return losses dB >= 11

Max. input level return path

(2) (3)

dBμV 95

Impedance ohm 75

Optical input
(forward channel)

Optical device type

InGaAs Pin

Photodiode

Detection bandwidth MHz 1 ··· 3000

Wavelength nm 1200 ··· 1600 Max. Optical power received mW/dBm 4 / 6

Optical output
(return channel)

(3)

Laser type Fabry-Perot

Maximum ouitput power mW/dBm 2 / 3

Wavelength nm 1310±20

General

Powering/Consumption

12 Vdc

mA

300 355

(3)

RF connectors type female F

24 Vdc 155 175

(3)

Operating temperature ºC -5 ··· +45 Optical connectors SC/APC

(1) Output: 42 TV CH CENELEC and 1 complete satellite transponder. The output attenuator in 0dB position.
(2) According to DIN45004B
(3) Only ref. 2336

Optical receivers refs. 2335, 2336

EN

7

Ampli er
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. Ampli ers technical speci cations

1.6. Technical specs. Power Supply Unit

1.7. Blocks diagrams

Diplexer

Fwd path / Rtn

path

RF INPUT
(forward path)
RF OUTPUT
(return path

ref. 2333
ref. 2334

Attenuator

Forward path

Converter

RF Æ FO

Forward path

Control

LED Relay

Attenuator

Return path Return path

Converter

RF Å FO

FO INPUT

Return path

Return path

Control

LED Relay

FO OUTPUT

ref. 2333
ref. 2334

Forward path

ref. 2334

2333

PWR

2334

PWR

Optical Fiber Transmitter and Receiver

8

Diplexer

Fwd path / Rtn path

RF OUTPUT Fwd path

RF INPUT Rtn path

Return path

attenuator

Converter

RF Å FO

Return path

control

LED

Relay

Forward path

attenuator

Forward path

Æ

Converter

FO Æ 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

2334 T.0X Optical  ber transmitter 1310 nm + Return channel receiver

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

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

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

F. O. TRANSMITTER

T

E

S

T

(-

1
2

d

B

)

R

F

T

X

O

P

T

I
C

A

L
P

W

R

R

F

IN

L

E

V

E

L

A

D

J

.

A

L

A

R

M

0

2

4

6

8

1

0

12

14

16

18

P

W

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1

2

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

U

P

S

U

1

2

0

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

UQQA-S2-T

DVBS 2-QAM TWIN

F. O. TRANSMITTER

TEST

(-1

2
d

B

)

RF

T

X

O

P

T

IC

A
L

P

W
R

RF IN
LEVEL
ADJ.

ALARM

0

2

4

6

8

1

0

1

2

1

4

1
6

1

8

PWR

T

X

LASER APE

RT

URE

In

visib

le la

ser radiation.
D
o not w

atch d

ire

ctly w

ith op

tical in

strum

ents.

Cla

ss 1M

laser pro

duct.

5301

Optical Fiber Transmitter and Receiver

12

4. Description of elements

4.1. Optical transmitter

02340088 000

F. O. TRANSMITTER

TEST

(-12dB)

RF

TX OPTICAL PWR

RF IN
LEVEL
ADJ.

ALARM

0

2

4

6

8

1

0

12

1

4

1

6

18

PWR

TX

LASER APERTURE

Invisible laser radiation.

Do not watch directly with optical instruments.

Class 1M laser product.

02340089 000

F.O. TRANSMITTER

TEST

(-12dB)

RF

TX OPTICAL PWR

RF IN
LEVEL
ADJ.

ALARM

0

2

4

6

8

1

0

12

14

16

1
8

PWR

RX OPTICAL PWR

RF OUT
LEVEL
ADJ.

0

2

4

6

8

1

0

12

14

16

1
8

TX

RX

with RX

return path

LASER APERTURE

Invisible laser radiation.

Do not watch directly with optical instruments.

Class 1M laser product.

1

2

4

3

5

7

9

6

8

10

1

2

4

3

5

7

8

10

11

LASER APERTURE

CLASS 1M LASER

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 speci ed in this manual, can cause hazardous
radiation exposure.

Ref. 2333 Ref. 2334

LED ON Indicates

TX Optical PW

Optical power delivered by the equipment
from 5.5 dBm to 6.5 dBm

RX Optical PW

Optical level received by the return channel
from 3 dBm to -7 dBm.

Masa +12 ... 24V

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. Forward channel optical output

7. Return channel optical input

8. Return 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 speci ed in this manual, can cause hazardous
radiation exposure.

F.O. RECEIVER

RF

TX OPTICAL PWR

RF OUT
LEVEL
ADJ.

ALARM

0

2

4

6

8

1

0

1

2

14

16

1
8

PWR

RX OPTICAL PWR

TX

RX

with TX

return path

LASER APERTURE

Invisible laser radiation.

Do not watch directly with optical instruments.

Class 1M laser product.

F. O. RECEIVER

RF

RX OPTICAL PWR

RF OUT
LEVEL
ADJ.

ALARM

0

2

4

6

8

10

12

14

16

18

PWR

RX

2

1

4

7

6

8

2

1

9

3

5

4

5

LASER APERTURE

CLASS 1M LASER

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 chan­nel 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~

UPSU120

U

Q

P-C

I-T

CTRL

A

B

QPSK-PAL CI TWIN

PWR

A/V

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

24V

24V

24V

0V

0V

24V

Masa

EN

15

5. Examples of application

Correct use of the devices.

There are several basic concepts that should not be
forgotten. The technical speci cations 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 807 MHz

(dB)

EINn

(dBm/Hz)

Gain

at 1.2 GHz

(dB)

EINn

(dBm/Hz)

Gain

at 2.1 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:

EIN

TV

= -139.9 + 10×log(5×106)= -72.91 dBm

Now apply the formula [2] to calculate the C/N, as
follows:

C/N

TV

=Vin - EIN

TV

C/NTV = -26 dBm -(- 65.7 dBm) = -26+65.7

Then, C/N

TV

= 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

F. O. RECEIVER

F. O. TRANSMITTER

F. O. SPLITTER 1/4

F. O. RECEIVERF. O. RECEIVERF. O. RECEIVER

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

EIN

SAT

= -140.8 + 10×log(27×106) = - 65.7 dBm

As the input level is -36 dBm, C/N is:

C/N

SAT

= -36-(-65.7) = -36 + 65.7

C/N

SAT

= 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/N

COFDM

= 23 dB.

SAT channels will be DVB-S2, with a

C/N

DVBS2

= 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 = 8×10

6

Hz (8 MHz)

For SAT: BW = 27×10

6

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

F. O. SPLITTER 1/32

F. O. RECEIVER

F. O. TRANSMITTER

F. O. RECEIVERF. O. RECEIVER

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:

V

out rcvr

TERR

(dBμV) = 79 -17.3 = 61.7 dBμV

V

out rcvr

SAT

(dBμV) = 79 -16.3 = 62.7 dBμV

Applying the formula [1]:

EIN

TV

= EINn(TV) + 10×log(8×106) [dBm]

EIN

TV

= -122.8 + 69

EIN

TV

= -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:

EIN

SAT

= - 51.1 dBm

C/N

SAT

= -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

Guarantee

Televés S.A. offers a two year guarantee, beginning from the date of
purchase for countries in the EU. For countries that are not part of the EU,
the legal guarantee that is in force at the time of purchase is applied. Keep
the purchase invoice to determine this date.

During the guarantee period, Televés S.A. complies with the guarantee by
repairing or substituting the faulty equipment.

The harm produced by improper usage, wear and tear, manipulation by a
third party, catastrophes or any other cause beyond the control of Televés
S.A. is not included in the guarantee.