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8935CF
4-Channel Electrical to 4-Channel Fiber Optic Conversion Module
Key Features
•
Four-channel SDI/HD-SDI fiber transmitter
•
Also supports DVB ASI, AES, and Grass
Valley audio TDM interface
•
Supports up to two SFP devices for up to
four fiber optic outputs
•
Reclocking for stable long distance
signals
•
Reclock bypass for non-SDI signal types
•
Accommodates lasers with separated
wavelengths for CWDM optical
multiplexing
•
Single-mode fiber
•
Can be used with the 8935FC receiver and
other fiber-ready modules for distances of
between 0 and 50 km, depending on the
transmitter
•
Meets SMPTE 292M/297M/259M signal
specifications
Applications
•
Transporting multiple high-definition video
feeds over long distances
•
For constructing SD/HD-SDI optical tie-
lines
•
Sending multiple optical signals over long
distances to fiber-ready synchronizing
modules for re-timing
•
To feed the 8939FCA for an extremely
compact multiplexed fiber solution
Specifications
Supported Frame Types
GeckoFlex
Power Rating
7.5 Watts (with two SFP devices) – single slot
Modes of Operation
The 8935CF supports following modes of operations:
• Auto reclock 270 Mb/s / 1.5 Gb/s / bypass mode
• Auto reclock 270 Mb/s / 1.5 Gb/s mode
• Fixed reclock 270 Mb/s mode
• Fixed reclock 1.5 Gb/s mode
• Fixed bypass mode
Environmental
Operating temperature range: 0 to +45°C
Non-operating temperature range: -10 to +70°C
Humidity: 90% non-condensing
Serial Digital Input
Connector: BNC equalized for up to 300m of Belden
1694A cable for bit rates up to 270 Mb/s and up to
100 m of Belden 1694A for bit rates from 270 Mb/s
to 1.5 Gb/s
Input impedance: 75Ω
Return loss: 15 dB
Reclocking:
• SMPTE 292 M-1998 at 1.485 Gb/s
• SMPTE 259M-1997 and DVB-ASI at 270 Mb/s
Non-reclocking: 1 to 540 Mb/s, AES 3id-2001 and
MADI
The 8935CF is a four-channel electrical to
optical broadcast quality fiber optic conversion
module with reflected electrical outputs. It
can accommodate SD/HD-SDI video inputs
from 270 Mb/s to 1.5 Gb/s as well as DVB
ASI, unbalanced AES, and Grass Valley audio
TDM interfaces. The optical circuitry is housed
in dedicated strapmount SFP submodule
devices mounted on the module circuit board.
To construct a four-channel solution, select
two of the SFP transmitter devices for two
four-channel operation. The SFPs selected
set the power and the wavelength for the
unit, which allows for CWDM operation when
combined with the 8939FCA/8939FCB optical
multiplexer. This replaceable optical technology
allows for easy upgrade, reconfiguration, and
servicing.
Parameters are controllable via the NetConfig
Web browser interface for configuration and
parameter adjustment. The popular NetCentral
application provides health monitoring for
modular products as well as many other Grass
Valley products.
Coax
Bypass
Inputs
Equalizer #1
Reclock
Ch
1
Bypass
Equalizer #2
Reclock
Ch2
Bypass
Equalizer #3
Reclock
Ch3
Bypass
Equalizer #4
Reclock
Ch4
Fiber Digital Outputs
Connector: Four LC optical connectors
Optical outputs: One optical per electrical input
Electrical outputs: One 75Ω BNC reflected electrical
output per electrical input
Electrical Length
Reclocked at 270 Mb: 10 ns
Reclocked at 1.5 Gb: 8 ns
Bypass: 7 ns
Fiber Optic Submodule Devices
Channels
2 Frequencies per CWDM SFP Device
Channel 1 and 2
1470 nm & 1490 nm Transmitters
Channel 3 and 4
1510 nm & 1530 nm Transmitters
Channel 5 and 6
1550 nm & 1570 nm Transmitters
Channel 7 and 8
1590 nm & 1610 nm Transmitters
Channel 9 and 10
1310 nm & 1330 nm Transimitters
Channel 11 and 12
1350 nm & 1370 nm Transmitters
Channel 13 and 14
1390 nm & 1410 nm Transmitters
Channel 15 and 16
1430 nm & 1450 nm Transmitters
These SFP transmitters are Class 1 laser devices
8935CF-R
CH 1
Input
CH 2
Input
CH 3
Input
CH 4
Input
Fiber Out
Connector
Cable Driver #
1
Cable Driver
2
#
Cable Driver #
3
Cable Driver
4
#
TX #1
TX #2
Dual TX
TX #3
TX #4
Dual TX
Ordering Information
This module can be mounted in a single slot in
a GeckoFlex frame but not in other 8900 series
frames, including Gecko-A or Gecko-V frames.
8935CF
Electrical to fiber optic 1:1 converter baseboard,
(front and 8935CF-R rear module set)
Important Order Note: Two SFP devices are required
for the full operation of the 8935CF module.
SFP Device – Dual Transmitter
• SFP-13103G-M1DTX-K
SFP Device – Dual Transmitter for CWDM
• SFP-CWDM3G-1-K – 1470 nm and 1490 nm
• SFP-CWDM3G-2-K – 1510 nm and 1530 nm
• SFP-CWDM3G-3-K – 1550 nm and 1570 nm
• SFP-CWDM3G-4-K – 1590 nm and 1610 nm
• SFP-CWDM3G-5-K – 1310 nm and 1330 nm
• SFP-CWDM3G-6-K – 1350 nm and 1370 nm
• SFP-CWDM3G-7-K – 1390 nm and 1410 nm
• SFP-CWDM3G-8-K – 1430 nm and 1450 nm
For detailed specifications, installation, and setup
instructions see:
www.grassvalley.com/docs/modular
59
CH 1
Output
CH 2
Output
CH 3
Output
CH 4
Output
Fiber I/O
Connector
Ch1
Ch2
Ch3
Ch4
FO1
FO2
FO3
FO4
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