Grass valley 8939FCA, 8939FCB DATASHEET

Speciﬁcations

Ordering Information

The 8939FCA and 8939FCB are bi-directional

optical CWDM multiplexer/demultiplexer

modules for the 2 RU GeckoFlex frame. They

are used where multiple signals need to be

sent over one fiber. When used together, these

flexible modules are designed to multiplex up

to 16 fiber optic signals onto a single fiber.

Each passive optical module supports

SD-SDI, HD-SDI, and 3G-SDI signals from

GeckoFlex modules equipped with SFP

(small form-factor pluggable) CWDM optical

transmitters and will handle up to 3 Gb/s.

Standard receivers can be used on each

output for the receive function with each

module separating the light into its discrete

wavelengths. These modules can be used both

on the transmit, launch side, or the receive side

of the cable.

With the 8939FCA module, the eight main

optical ports can be used to accept CWDM

wavelength lasers where each signal uses a

specific wavelength of light. The expansion port

can accept or deliver an additional 1310 nm

wavelength signal for 9:1 multiplexing.

GeckoFlex fiber-ready modules can be

equipped with CWDM fiber transmitters for

ultra-compact multiplexed optical capability.

The 8939FCA can also be used with the

8935FCB module to increase the number

of optical channels to 16 which can be

transmitted over one single-mode fiber cable.

Refer to the block diagrams shown on the

following page for using the modules.

Key Features

Optical multiplexer/demultiplexer for •

combining signals on a single fiber

8939FCA provides up to 8:1 or 1:8 •

multiplexing or demultiplexing using

CWDM technology

Will accept a ninth 1310 nm signal for 9:1 •

multiplexing when connected to the EXP

port of the 8939FCA

Using the 8939FCB connected to the EXP •

port of the 8939FCA, up to 16 channels

can be transmitted on a single fiber

Up to 10 8939FCA modules can be housed •

in a GeckoFlex frame providing up to

80 channels of optical multiplexing or

demultiplexing per 2 RU frame

The module is a passive optical device for •

reliable service

Applications

For transporting multiple SD/HD/3G-SDI •

video signal over a limited fiber cable

capacity

When reducing infrastructure costs •

(cabling, electrical power consumption,

space, etc.) is required – multiplexed

video over fiber gives us an 8:1 ratio on

cabling and support equipment

Fiber is commonly used in any application •

where SD/HD/3G-SDI signals are found

Supported Frame Types

GeckoFlex

Power Rating

0.0 Watts (passive) – single-slot one piece rear mount

Performance Specifications

8939FCA: 8-channel CWDM channels: 1470 nm,

1490 nm, 1510 nm, 1530 nm, 1550 nm, 1570 nm,

1590 nm, 1610 nm

8939FCB: 8-channel CWDM channels: 1310 nm,

1330 nm, 1350 nm, 1370 nm, 1390 nm, 1410 nm,

1430 nm, 1450 nm

Expansion port wavelength coverage:

1260 nm > 1450 nm

8-channel insertion loss: 2.25 dB max.

Expansion port insertion loss: 1.25 dB max.

8-channel link loss: 4 dB max.

Adjacent channel isolation: 35 dB typical

Non-adjacent channel isolation: 50 dB min.

Polarization dependant loss: 0.1 dB max.

Optical return loss: 50 dB min.

Optical ripple: 0.5 dB max.

Thermal stability: 0.005 nm/°C

Channel uniformity 8ch: 1.25 dB typical

Environmental

Storage temperature: -10 to +70°C

Operating ambient temperature: -40 to +85°C

Reference Information

The CWDM SFP transmitter submodule devices used

on 8943CF and the SFP receiver used on 8943FC

modules (or other fiber-ready GeckoFlex modules)

used in conjunction with the 8939FCA and 8939FCB

support the following frequencies supporting data rates

up to 3 Gb/s:

Model Transmitter Frequencies Supported

SFP-CWDM3G-1-K 1470 nm 1490 nm

SFP-CWDM3G-2-K 1510 nm 1530 nm

SFP-CWDM3G-3-K 1550 nm 1570 nm

SFP-CWDM3G-4-K 1590 nm 1610 nm

SFP-CWDM3G-5-K 1310 nm 1330 nm

SFP-CWDM3G-6-K 1350 nm 1370 nm

SFP-CWDM3G-7-K 1390 nm 1410 nm

SFP-CWDM3G-8-K 1430 nm 1450 nm

Receiver Frequency Supported

SFP-13103G-M1DRX-K 1270 nm > 1610 nm Dual Receiver

NOTE: The CWDM submodules listed above may also

be used with the 8935CF and 8935FC but the 8935

modules only handle bit rates up to 1.5 Gb/s..

These modules can be mounted in a GeckoFlex

frame but not in other 8900 series frames,

including Gecko-A or Gecko-V frames. These

modules mount from the rear, each taking up one

slot. These modules have no controls or settings.

8939FCA

Rear-mount fiber optic mux and demux 8:1 or 1:8

module with Ch1 – Ch8 with expansion port

8939FCB

Rear-mount fiber optic mux and demux 8:1 or 1:8

module used with the 8939FCA to provide eight

additonal fiber optic channels Ch9 – Ch16

WARNING

The COM and EXP outputs of the 8939FCA and

8939FCB may fall into the Class IIIa Laser Device

catagory, depending on number of SFP input choices.

CH10

1330 nm

COM

8939FCB

CH9

1310 nm

CH11

1350 nm

CH12

1370 nm

CH14

1410 nm

CH13

1390 nm

CH15

1430 nm

CH16

1450 nm

Class |||a

Laser Product

N/A

CH2

1490 nm

COM

8939FCA

CH1

1470 nm

CH3

1510 nm

CH4

1530 nm

CH6

1570 nm

CH5

1550 nm

CH7

1590 nm

CH8

1610 nm

Class |||a

Laser Product

EXP

638939FCA/8939FCB Fiber Optic Mux/Demux Modules

For detailed specifications, installation, and setup

instructions see:

www.grassvalley.com/docs/modular

Block Diagrams for Mux/Demux Applications

The 8939FCA module can be used alone for various applications or together with the 8939FCB module, depending on the application. Refer to the block

diagrams below for applications for both modules. In all of the applications using the 8939FCA and 8939FCB modules, the 8935CF/8935FC (1.5 Gb/s) or

8943CF/8943FC (3 Gb/s) or other fiber-ready GeckoFlex modules feeding video to the 8939 modules must be fitted with the correct frequency SFP fiber

optic submodule and cabled to the corresponding channel for that frequency.

8939FCA Bi-Directional Application

The 8939CFA and 8939FCB can also be used in a bi-directional application

where any single channel on the module can transport a video signal on

its specific wavelength independent of the direction and use of the other

channels as shown in the block diagram at right. When the 8939FCB is

connected to the 8939FCA via the EXP port, the module can mux and demux

16 channels in two directions in any combination.

8939FCA/8939FCB 16-Channel Mux/Demux Application

When the 8939CFA is used with the 8939FCB as shown in the block diagram at left, an

additional eight fiber optic channels from the 8939FCB are made available. This allows

a total of 16 channels to be multiplexed and demultiplexed on a single fiber cable.

8939FCA 9:1 Multiplexer to 1:9 Demultiplexer

The 8939FCA can multiplex up to nine fiber video channels from two 8943CF (Coax to Fiber) modules and another 1310 nm Grass Valley fiber-ready

module. Another 8939FCA can demultiplex the signals and feed them to two 8943FC (Fiber to Coax) modules and a 1310 nm fiber-ready Grass Valley

module over a single-mode fiber cable at a location up to 50 kilometers away.

When used as a nine-channel Mux > Demux device, the module can handle nine channels of video as shown in the block diagram example below. Note

that this includes the use of the EXP ports in both modules.

Single-mode

Fiber

Distance

of 50 km

Ch1

Ch2

Ch3

Ch4

Ch1

Ch2

Ch3

Ch4

SD/HD-SD

Coax In

SD/HD-SD

Coax Out

SD/HD/3G

SDI Coax In

Ch6 TX

Ch5 TX

Ch2 TX

Ch1 TX

Ch7 TX

Ch8 TX

Ch9 TX

EXP

1610 nm

1310 nm

1590 nm

1570 nm

1550 nm

MUX

8939FCA

8943FC

CWDM3G-3

CWDM3G-4

CWDM3G-1

CWDM3G-2

8943CF

COM

8900

Fiber-Ready

Module

Ch1

Ch2

Ch3

Ch4

Ch1

Ch2

Ch3

Ch4

SD/HD/3G

SDI Coax Out

1260 nm TO

1610 nm DRX

1260 nm TO

1610 nm DRX

1260 nm TO

1610 nm DRX

1260 nm TO

1610 nm DRX

8943FC

8900

Fiber-Ready

Module

1490 nm

1470 nm

Ch3 TX

Ch4 TX

1530 nm

1510 nm

CH1

1470 nm

CH2

1490 nm

CH3

1510 nm

CH4

1530 nm

CH5

1550 nm

CH6

1570 nm

CH7

1590 nm

CH8

1610 nm

EXP

DEMUX

8939FCA

COM

CH1

1470 nm

CH2

1490 nm

CH3

1510 nm

CH4

1530 nm

CH5

1550 nm

CH6

1570 nm

CH7

1590 nm

CH8

1610 nm

Ch9 TX

1310 nm

Ch6 TX

Ch5 TX

Ch2 TX

Ch1 TX

Ch7 TX

Ch8 TX

1610 nm

1590 nm

1570 nm

1550 nm

1490 nm

1470 nm

Ch3 TX

Ch4 TX

1530 nm

1510 nm

COM

EXP

8939FCA

Single-mode Fiber (up to 50 km)

8939FCA

Ch1 TX

Ch2 TX

Ch3 TX

Ch4 TX

Ch5 TX

Ch6 TX

Ch7 TX

Ch8 TX

COM

Ch1 RX

Ch2 RX

Ch3 RX

Ch4 RX

Ch5 RX

Ch6 RX

Ch7 RX

Ch8 RX

COM

8939FCB 8939FCB

Ch9 TX

Ch10 TX

Ch11 TX

Ch12 TX

Ch13 TX

Ch14 TX

Ch15 TX

Ch16 TX

COM

Ch9 RX

Ch10 RX

Ch11 RX

Ch12 RX

Ch13 RX

Ch14 RX

Ch15 RX

Ch16 RX

MUX

DEMUX

MUX

DEMUX

EXP

EXP (N/A)(N/A) EXP

8939FCA

Ch7 RX

Ch8 RX

Ch3 TX

Single-mode

Ch4 TX

Ch1 TX

Ch5 RX

Ch6 RX

Ch1 RX

Ch2 RX

Ch2 TX

Ch3 RX

Ch4 RX

Ch5 TX

Ch6 TX

Ch7 TX

Ch8 TX

EXP

8943CF CH 1-4

8943CF CH 5-8

8943FC CH1-4

8943FC CH 5-8

EXP

COMM

8939FCA

64 8939FCA/8939FCB Fiber Optic Mux/Demux Modules