Grass Valley LUMO User Manual
User Manual
974-99M00-103
30 March 2014
Copyright & Trademark Notice
Copyright © 2014, Miranda Technologies Partnership. All rights reserved.
Belden, Belden Sending All The Right Signals, and the Belden logo are trademarks or registered
trademarks of Belden Inc. or its affiliated companies in the United States and other jurisdictions.
Miranda and LUMO are trademarks or registered trademarks of Miranda Technologies
Partnership. Belden Inc., Miranda Technologies Partnership, and other parties may also have
trademark rights in other terms used herein.
Terms and Conditions
Please read the following terms and conditions carefully. By using Miranda product
documentation, you agree to the following terms and conditions:
Miranda Technologies Partnership (“Miranda”) hereby grants permission and license to
owners of Miranda products to use their product manuals for their own internal business
use. Manuals for Miranda products may not be reproduced or transmitted in any form or by
any means, electronic or mechanical, including photocopying and recording, for any
purpose unless specifically authorized in writing by Miranda.
A Miranda manual may have been revised to reflect changes made to the product during its
manufacturing life. Thus, different versions of a manual may exist for any given product.
Care should be taken to ensure that one obtains the proper manual version for a specific
product serial number.
Information in this document is subject to change without notice and does not represent a
commitment on the part of Miranda.
Warranty information is available in the Support section of the Miranda Web site
(www.miranda.com).
Document Revision History
Revision Published Description of Changes
974-99M00-100 10 Sep 2012 Initial release of LUMO-BNC frame.
974-99M00-101 29 Nov 2012 Release of LUMO-CPU-ETH controller card, and iControl support.
974-99M00-102 16 Apr 2013 Updatiing of safety compliance information
974-99M00-103 30 Mar 2014 Release of LUMO-DIN frame and FIO-911 series cards.
Discontinuance of FIO-901-series cards.
ii
Safety Compliance
LUMO
User Manual
This equipment complies with:
• CSA/UL/IEC/EN 60950-1, 2nd Ed. + AM1, Information Technology Equip-
ment - Safety requirements
The power cord supplied with this equipment meets the appropriate national
standar
ds for the country of destination.
WAR NIN G:
CAUTION:
An appropriately listed/certified mains pow
for the connection of the equipment to the mains voltage at either 120V~
or 240V~.
This equipment is meant to be installed in a restricted access location.
These servicing instructions are for
To reduce the risk of electric shock, do not perform any servicing other than that
c
ontained in the operating instructions unless you are qualified to do so. Refer
all servicing to qualified service personnel. Servicing should be done in a staticfree environment.
CAUTION: THIS UNIT HAS MORE THAN ONE POWER SUPPLY CORD. DISCONNECT
TWO (2) POWER SUPPLY CORDS BEFORE SERVICING TO AVOID ELECTRIC SHOCK.
This equipment incorporates modules c
These modules are certified by the manufacturer to comply with:
use by qualified personnel only.
er supply cord must be used
ontaining Class 1 lasers
• EN 60950-1:2006+A11
• EN 60825-1:2007
• EN 60825-2:2004+A1
iii
Electromagnetic Compatibility
This equipment has been tested for verification of compliance with FCC Part 15,
Subpart B requirements for Class A digital devices.
NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.
This equipment has been tested and found to comply with the requirements of the
EMC directive 2004/108/CE:
• EN 55022 Conducted emissions, Class A
• EN 55022 Radiated emissions, Class A
• EN 61000-3-2 Harmonic current emission limits
• EN 61000-3-3 Voltage fluctuation and flicker limitations
• EN 61000-4-2 Electrostatic discharge immunity
• EN 61000-4-3 Radiated electromagnetic field immunity - RF
• EN 61000-4-4 EFT immunity
• EN 61000-4-5 Surge immunity
• EN 61000-4-6 Conducted immunity
• EN 61000-4-8 Power frequency magnetic field immunity
• EN 61000-4-11 Voltage dips, short-interruption and voltage variation immunity
Environmental Protection
Based on technical specifications provided our suppliers and sub-contractors and to the best of
our knowledge
1. Cadmium (Cd) Content is 100 ppm or less
2.
3. Lead (Pd) Content is 1000 ppm or less
4. Mercury (Hg) Content is 1000 ppm or less
iv
1
, this product is in conformity with the requirements of the following directive:
2011/65/EU Of the European Parliament and of the Council of 8 June 2011 on
Hexavalent Chromium (CrVI) Content is 1000 ppm or less
the restriction of the use of certain hazardous substances in electrical and electronic equipment [*]
LUMO
User Manual
5. Polybrominated biphenyls Content is 1000 ppm or less
6. Polybrominated diphenyl ether Content is 1000 ppm or less
Applicable exemptions:
6(a) Lead as an alloying element in steel for machining purposes and in galvanized steel
containing up to 0.35 % lead by weight
6(b) Lead as an alloying element in aluminum containing up to 0.4 % lead by weight
6(c) Copper alloy containing up to 4 % Lead by weight
7(a) Lead in high melting temperature type solders (lead-based alloys containing 85 % by
weight or more lead)
7(c)-I Electrical and electronic components containing lead in a glass or ceramic other than
dielectric ceramic in capacitors (piezoelectronic devices) or in a glass or ceramic matrix
compound
Note 1: The statement made herein is based on Miranda’s knowledge of the materials in the
manufacture of its products as of the date of such statement. All statements are contingent
upon the accuracy of such information. Miranda continues to take steps to provide accurate
information but does not conduct destructive testing or chemical analysis on incoming mate
-
rials and chemicals to verify suppliers’ representations.
[*] OJ L 174, 1.7.2011, p. 88.
v
vi
Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction to LUMO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 LUMO Housing Frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Field-Serviceable Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Status Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 LUMO-CPU-ETH Controller Card . . . . . . . . . . . . . . . . . . . . . . . . 17
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Control Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 FIO-911 O/E and E/O Converters . . . . . . . . . . . . . . . . . . . . . . . . 35
FIO-911 3G/HD/SD Optical to/from Electrical Converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
FIO-911-4R-LC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
FIO-911-4T-S13-LC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
FIO-911-4TH-CwwCxxCyyCzz-LC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
iControl Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6 SFP Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Installing an SFP module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Connecting the fiber optic cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Removing the fiber optic cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Removing an SFP module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Contact Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
vii
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
viii
Chapter 1 is an introduction to the LUMO series of products.
Topics
Introduction to LUMO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1
Introduction to LUMO
The LUMO is a high-density 1RU frame with 36 SFP-based fiber converters, ideal for large distribution of high bandwidth 3Gbps signals. LUMO’s 1RU size minimizes rack space, and oftencomplex cabling concerns have been greatly reduced by including fiber connectivity on one
side of the unit and coax electrical on the other.
Reliability and serviceability is further secured through the use of hot-swappable cards and a
redundant PSU, as well as remote system health monitoring and alarming for all key compo
nents, including optical signal strength.
Introduction
-
Key Features and Benefits
• High-density 1RU frame with 36 SFP-based fiber converters
• Supports 2 x 18 CWDM wavelengths
• Modular, hot-swappable SFPs and cards for efficient serviceability
• Mechanical design with fiber connectivity on one side and coax on the other for ease of
cabling
• Redundant, hot swappable built-in power supplies
• Remote system health monitoring and alarming for all key components
• Fiber support for convenient and secure optical fiber installation
Available Options
• LUMO-CPU-ETH controller for ethernet access and control
• Second power supply for redundant power security
1
Introduction
Introduction to LUMO
Cards (maximum 9 per frame)
The following cards are available to be used with the LUMO frame:
These cards can be used in any combination to occupy the nine available slots in the LUMO
frame.
• FIO-911-4T-S13-LC Quad 3Gbps/HD/SD optical transmitter 1310 nm LC/PC connectors
• FIO-911-4R-LC Quad 3Gbps/HD/SD optical receiver LC/PC connectors
• FIO-911-4TH-CwwCxxCyyCzz-LC High power Quad 3Gbps/HD/SD optical CWDM Tx, LC/PC
connector.
CwwCxx and CyyCzz show the wavelengths of the CWDM transmitters used in this card.
2
Overview
LUMO Housing Frame
Chapter 2 describes the LUMO housing frame and details of its installation.
Topics
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4
Physical Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4
Assembling the LUMO Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6
Installing Cards in the LUMO Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 8
Installing the Power Cord Retaining Clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 8
Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 9
Field-Serviceable Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 9
Changing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 10
Replacing or Upgrading the Controller Card or Status Card . . . . . . . . . . . . . . . . . . . . . . . . . . page 10
Replacing the Frame Ventilation Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 12
The 1-RU LUMO housing frame and its associated LUMO-series cards are designed to provide
maximum configuration flexibility in a high density and low cost 1-RU chassis. The basic configuration includes one power supply unit and a chassis status
Up to 9 FIO-911-series cards can be installed within a single frame. The LUMO frame offers full
flexibility and integration of a variety of functions and signal types on BNC/DIN or fiber SFP. All
components are hot-swappable and can be quickly configured. The frame is air-cooled, the
PSUs and fan are monitored and status reporting is available. Each card has some multicolored
LEDs for status reporting as well. Remote control and status monitoring via Ethernet is available
as an option. The frame is available in two versions, identified by the rear connector type:
• LUMO-BNC
• LUMO-DIN
card for basic system monitoring.
3
LUMO Housing Frame
Overview
Features
• 1 RU with 19” rack mount
• Up to 9 cards (72 Watts)
• Ease of serviceability
• Hot-swappable PSU with optional 2
• Hot-swappable cards, SFPs, controller and fan
• Status and alarm over IP with optional LUMO Ethernet Controller
• Cards can operate without controller
• Small granularity
• Fiber on the front, coax on the rear
• Multiple video and audio formats can be fitted in a single chassis
Physical Layout
Front Panel Appearance
nd
redundant PSU
Each card (numbered 1 to 9 from left to right as seen from the front of the unit) has its own face
plate which allows the status LEDs on the installed cards to be seen and also allows the card to
be secured in the chassis by a screw. The opening near the center of the panel is for the status or
controller card status LED.
Rear Panel Appearance
The rear panel incorporates the electrical signal connectors, and so has a different appearance
for the LUMO-BNC and the LUMO-DIN. The central portion of the panel is the same for both
models.
LUMO-BNC Rear Panel
4
LUMO-DIN Rear Panel
The functionality of Ethernet connectors is described in the Controller card chapter.
LUMO
User Manual
The details of the rear panel card lexans vary depe
Chapter 5.
Installation
Unpacking
Make sure the following items have been shipped with your LUMO frame:
nding on the card type, and are described in
• LUMO-BNC or LUMO-DIN frame, including 1 Power Supply unit (AC in) and 1 Status card
• If the optional LUMO CPU-ETH controller has been ordered, the Status card is not
included
• Rack-mounting brackets (1 pair, with 8 mounting screws)
• An AC power cord
• Power cord retaining clips (2)
• LUMO-series cards (per order) with associated lexans
• Fiber Support with 8 mounting screws
• LUMO controller card (optional)
• A second power supply and AC cord (optional)
5
LUMO Housing Frame
Installation
Assembling the LUMO Frame
The LUMO frame is shipped with neither the frame mounting brackets nor the fiber support
installed
.
These instructions describe the insta
onto the LUMO frame.
The rack mounting brackets may be installed alone (See
fiber support.
If the rack mounting brackets are installed with the fiber support, the fiber support must be
installed first. See section B.
llation of the rack mounting brackets and the fiber support
section A), or in combination with the
A Installing the rack mounting brackets alone
Position a bracket at each side of the LUMO frame, and install them using the four provided
screws, as shown in the Figur
e.
6
LUMO
User Manual
B Installing the Fiber Support
If you are installing this support onto a LUMO frame which has rack mounting brackets installed,
you must remove those brackets first, and then re-install them after the fiber support has been
installed, as described in Section C.
Position the fiber support against the LUMO frame as shown in the figure , and attach it to the
frame with the eight provided screws.
C Installing the Rack Mounting Brackets with the Fiber Support
After the fiber support is installed, you may install the rack mounting brackets in either of two
positions, using four provided screws for each bracket. The figure illustrates the two possible
mounting positions.
Once installation of the rack mount brackets is complete, the LUMO frame should be installed
directly into a standard 19” rack using 4 standard rack-mounting screws through the four holes
in the corners of the rack mount brackets.
7
LUMO Housing Frame
Installation
Installing Cards in the LUMO Frame
Each card includes an integrated front panel incorporating the fiber optic connectors.
All cards can be installed with the frame power on. The card has a connector which plugs into a
ba
ckplane for distribution of power, connection to the controller card, and connections to the
input and output connectors.
To install the card :
1 To remove an existing card from the slot, unscrew the existing card front panel and gently
pul
in an empty position, first remove the blank card front by unscrewing it and pulling the handle straight out of the slot.
2 Slide the new card into the slot and push gently on the handle to seat the connectors.
Secure the card in place with the provided front panel captive screw.
l the handle on the front of the card to pull the card straight out of the slot. To add a card
Slip the lexan that was shipped with the card over
rear panel that are associated with the slot into which the card was installed. The lexan identifies
the function of the connectors for that card.
Note: D
each card type.
etailed information about the rear panel connections is included in the chapters describing
the connectors ( four BNC or eight DIN) on the
Installing the Power Cord Retaining Clips
Each power supply is provided with a power cord retaining clip that holds the power cord in
place to prevent inadvertent disconnections.
With the power cord removed, install the clip into the
cord socket on the rear of the frame, by slipping the two ends of the clip into a pair of holes in
the plate, and rotating the clip down into a horizontal position. Several pairs of holes are
provided to accommodate different sizes of plugs. Use the holes that position the clip closest to
the body of the plug.
Once the clip is in place, inser
ping loop of the clip.
t the power cord into the socket, and press the cord into the grip-
plate that extends out beneath the power
8
LUMO
User Manual
Ventilation
Ventilation for the frame is provided by a fan mounted in the center of the rear panel. The fan
draws air through the frame and exhausts it to the rear. Ventilation slots are provided in the
chassis and cards front panels to allow air to flow into the frame.
Important Note:
times when cards are installed and operating. As well, blank card front panels must be installed if no
card is present in a slot.
to ensure proper cooling, the front panel of the LUMO frame must be closed at all
Ensure that the front panel ventilation slots of the chassis and the car
Field-Serviceable Items
Field-serviceable items on the LUMO frame itself include the power supplies, the status or
controller card, and the ventilation fan.
The power supplies and status or controller card are located behind the door on the front panel.
T
he door must be opened to change the power supplies, and it must be removed to change the
status or controller card.
Opening and removing the front panel
The front panel of the LUMO frame is attached by swivel brackets. Two spring-loaded sliders
secure the panel in the closed position. To open the panel, pull the sliders toward the center of
the panel, and then pull the panel out until the support brackets allow it to move down below
the level of the power supplies. The supplies can then be removed.
To remove the status card, the door must be detached
push the flexible brackets apart until the door posts slip out of the holes in the brackets.
There are no electrical connec
Reinstall the panel by slipping the door posts int
door into position and snap it in place. The spring-loaded sliders will hold it in position.
ds are not obstructed.
from the frame. Once the door is open,
tions to the panel.
o the holes in the brackets, and then move the
Note that the door must be kept closed while the
frame is in use, to ensure proper ventilation.
9
LUMO Housing Frame
Field-Serviceable Items
Changing the Power Supply
The LUMO frame supports dual redundant hot-swappable power supplies. The basic configuration includes a single supply, plus an empty sl
Installing a second power supply module and applying power to it automatically engages the
redundant supply mode. Each power supply has its own power socket on the rear panel, and
should be connected to the AC supply using the supplied power cord or other approved cord.
• A single supply can be installed in either of the two slots
To install or change a power supply module:
1 Open the front panel of the frame
2 Remove the power supply module by pulling on the handle on its front panel and sliding it
out of the frame
3 Slide the new power supply module into the slot, and push it gently into position to seat the
connectors. There is no guiding slot - the supply base sits on the floor of the frame.
4 Close the front panel of the LUMO frame. The panel secures the power supplies in place.
ot for the optional redundant power supply.
10
Replacing or Upgrading the Controller Card or Status Card
The Controller or Status card is located between the power supply slots at the center of the
frame. To replace the card, proceed as follows:
1 Open the center front door, remove the door
into the frame
2 Hook your finger over the plastic diffuser mounted at the front of the card, and pull out gen-
tly until the card is released from the rear connector; then slide the card out of the frame.
3 Slide the new card into the controller slot, and push gently on the card edge to engage the
rear connectors.
and push the door mounting brackets back
LUMO
User Manual
4 Pull the door mounting brackets back out of the frame, and re-install the door onto the
brackets.
5 Be sure to close the door before operating the LUMO system, to ensure proper ventilation.
Replacing the Frame Ventilation Fan
In case of failure of the main cooling fan on the rear of the frame, replace it according to the
following steps.
1 Procure a replacement fan. It is available from Miranda as part #1974-1500-100
2 Remove the defective fan from the frame:
• Disconnect the fan power by grasping the connector and pulling straight out.
• Remove the two screws that secure the fan unit to the frame and pull the fan unit away
from the frame.
• Retain the screws, as they will be used with the replacement fan.
11
LUMO Housing Frame
Specifications
3 Install the replacement fan:.
Specifications
MECHANICAL
Dimensions 1RU x 17.60” W (447 mm) x 10” D (254 mm) without fiber support
Weight: 8.9 lbs (4.45 kg) with 1 PSU and controller card installed
• Use the two screws that were retained when the old fan was removed to install the new
fan onto the rear panel. See the note above.
• Grasp the power connector attached to the fan assembly, and push it onto the power
outlet located to the left of the fan on the rear panel
1RU x 17.60” W (447 mm) x 20.25” D (515 mm) with fiber support
with connectors
POWER
Rating: 100-240V~
0.83 - 0.42 A
50/60 Hz
150 W max
Ambient Temperature: 40° C max
COOLING
Fans: 1 on frame, removable
COMMUNICATION
Connectors: RJ45 (2)
Compliant to: 10BaseT/100BaseTx
12
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