GS3490
EB-GS3490
User Guide
EB-GS3490 Evaluation Board
User Guide
Rev. 1
GS3490 UG
April 2013
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Revision History (Document # GS3490 UG)
Version
ECO
PCN
Date
1
012304
-
April 2013
0
010414
-
December 2012
Changes and/or Modifications
Changed R16 value from 130Ω to 137Ω
on Schematics of GS3490 and Mode Set
Dip Switches and Bill of Materials
New document.
Contents
Revision History (Document # GS3490 UG)..............................................................................................2
General Description ..........................................................................................................................................3
EB-GS3490 Evaluation Kit Contents............................................................................................................3
Overview ..............................................................................................................................................................3
1. Hardware Components ...............................................................................................................................4
1.1 SDI Inputs and Outputs ..................................................................................................................4
1.2 Power ....................................................................................................................................................5
1.3 Dip Switch Settings ..........................................................................................................................5
1.4 LED Indicators ...................................................................................................................................6
1.5 J1 & J2 External Mode Control .....................................................................................................6
2. Getting Started................................................................................................................................................7
2.1 Equalizer Mode .................................................................................................................................7
2.2 Cable Driver Mode ...........................................................................................................................7
3. Schematics .......................................................................................................................................................8
3.1 Schematics of GS3490 and Mode Set Dip Switches ..............................................................8
3.2 Schematics of GS2988 and GS3440 ............................................................................................9
3.3 Schematics of Power Posts and LEDs ...................................................................................... 10
4. Board Layout................................................................................................................................................ 11
5. Bill of Materials............................................................................................................................................ 15
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General Description
The GS3490 Evaluation Kit is designed to accelerate the evaluation process of the
GS3490 Configurable Adaptive Cable Equalizer/Cable Driver. For detailed device
information, please read the GS3490 Data Sheet (Doc ID: GENDOC-058568).
EB-GS3490 Evaluation Kit Contents
•
1 Semtech EB-GS3490 Evaluation Board
•
1 CD containing GS3490 collateral
Overview
The purpose of the EB-GS3490 Evaluation Kit is to evaluate the GS3490. The GS3490 is
designed to support SMPTE ST 424, SMPTE ST 292 and SMPTE ST 259 serial digital video
signals standards, and is optimized for performance at 270Mb/s, 1.485Gb/s and
2.97Gb/s data rates. It can be utilized as a single-device solution in applications where
the interface connector can be configured as either an input or output.
The diagram below shows the main components of the EB-GS3490 and how a
bidirectional SDI interface is implemented with a single BNC connector.
Power Input
SDO
BNC
GS2988
ORL
GS3440
IRL
SDI/O
BNC
IRL
ORL
GS3490
SDI
BNC
Status LEDs
Mode Set
SW1 and SW2
EB-GS3490 Functional Block Diagram
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1. Hardware Components
Figure 1-1 shows the inputs, outputs and power connections for the EB-GS3490.
Power Input Ports
TP1 TP2
GS2988
J6 SDI Output
GS3440
J3 Bidirectional SDI I/O
J4 SDI Input
GS3490
J1, J2 External Mode Control
See Section 1.5
D1, D2, D3
Status LEDs
SW1 and SW2
GS3490 Mode Setting Dip Switch
Figure 1-1: GS3490 Evaluation Board (EB-GS3490)
Note: The EB-GS3490 board you receive may look slightly different from the one
depicted in the above figure.
1.1 SDI Inputs and Outputs
Table 1-1 shows the SDI inputs and outputs of the EB-GS3490.
The 75Ω BNC (J3) is a bidirectional SDI I/O. When GS3490 is configured for Equalizer
Mode, the integrated cable equalizer in the GS3490 is able to operate at 2.97Gb/s,
1.485Gb/s and 270Mb/s, while providing a typical cable reach of 140m at 2.97Gb/s,
250m at 1.485Gb/s and 550m at 270Mb/s. When the GS3490 is configured for Cable
Driver Mode, the dual slew rate capability provides compatibility to SMPTE ST 259,
SMPTE ST 292 and SMPTE ST 424 interfaces.
Table 1-1: EB-GS3490 Inputs and Outputs
J3
SDI/O
Bidirectional SDI input and output, from/to 75Ω BNC and
coaxial cable
J6
SDO
SDI output to 75Ω BNC and coaxial cable, used when J3 is set
to input mode
J4
SDI
SDI input from 75Ω BNC and coaxial cable, used when J3 is
set to output mode.
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1.2 Power
The EB-GS3490 features two power posts (3V3, GND) as depicted in Table 1-2. A bench
power supply may be used to provide the power to the board. The board should
consume less than 300mA at 3.3V in most modes, but the power supply should be rated
for a minimum of 500mA.
Table 1-2: EB-GS3490 Power Supply
TP1
3V3
Most positive power supply connection,
+3.135V to +3.465V DC, typical +3.3V DC
TP2
GND
Most negative power supply connection
1.3 Dip Switch Settings
Two 4-bit dip switches, SW1 and SW2, provide the GS3490's mode selection. Table 1-3
shows the details of the dip switches.
Table 1-3: Dip Switch SW1 and SW2
Dip Switch
SW1
Bit #
Mnemonic
Factory
Default
1
NC
OFF
This bit is unused
2
NC
OFF
This bit is unused
3
EQ_DISABLE
OFF
Operation Mode Control for GS3490
4
CD_ENABLE
OFF
1
NC
ON
This bit is unused
2
RSV
ON
RSV pin of GS3490, connect to GND, keep it ON
3
EQ_BYPASS
ON
When OFF, Equalization function on GS3490 is bypassed
4
CD_SD_EN
ON
Description
When both ON, Equalizer Mode is set for GS3490
SW2
When both OFF, Cable Driver Mode is set for GS3490
Slew Rate Selection of GS3490 SDO/SDO:
ON: SMPTE ST 292 and ST 424 compliant (HD and 3G)
OFF: SMPTE ST 259 compliant (SD)
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1.4 LED Indicators
Three LEDs are provided on the board to indicate the status of the GS3490, GS2988 and
GS3440 as detailed in Table 1-4.
Table 1-4: EB-GS3490 LED Indicators
D1
OSP_CD
GS2988 Output Signal Presence Status
When illuminated, a good input signal has been
detected within the output stage pre-driver of
GS2988
GS3490 Equalizer Input Carrier Detect Status
When illuminated, a valid input signal is detected
on J3 SDI/O
D2
CD_IO
GS3490 Cable Driver Output Signal Presence Status
When illuminated, a valid output signal is detected
J3 SDI/O
D3
CD_EQ
GS3440 Carrier Detect Status
When illuminated, a valid signal is detected on J4
SDI
1.5 J1 & J2 External Mode Control
When external switches are utilized to control the mode of the GS3490, the
through-holes of J1 and J2 may be used to solder extension wires and switches. These
holes are pulled up to 3.3V through 1kΩ resistors on the board. Please note that Dip
Switches (SW1 and SW2) must be in the OFF position to use external switches or 3.3V
LVTTL logic to control the modes. Please refer to the schematic in Section 3.1 for more
details.
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2. Getting Started
When you are ready to evaluate the GS3490, please follow these quick-start steps:
2.1 Equalizer Mode
•
Set bit 3 and bit 4 of SW1 to the “ON” state
•
Set bit 4 of SW2 according to the data rate to be tested (refer to Table 1-3)
•
Connect J3 to an SDI source using a 75Ω co-axial cable of a supported length, refer
to GS3490 Data Sheet (Doc ID: GENDOC-058568) for details
•
Connect J6 to an SDI monitor using a short 75Ω co-axial cable
•
Connect a +3.3V DC/500mA bench power supply to TP1 (3V3) and TP2 (Ground)
•
Turn on the bench power supply
•
Carry out the measurements
•
Change the bit 3 of SW2 to Enable or Bypass the Adaptive Cable Equalization and
DC Restoration in GS3490 and observe the effect
2.2 Cable Driver Mode
•
Set bit 3 and bit 4 of SW1 to the “OFF” state
•
Connect J3 to an SDI monitor with a short 75Ω co-axial cable
•
Connect J4 to an SDI source using a 75Ω co-axial cable of a supported length, refer
to GS3440 Data Sheet (Doc ID: GENDOC-056482) for details
•
Connect a +3.3V DC/500mA bench power supply to TP1 (3V3) and TP2 (Ground)
•
Turn on the bench power supply
•
Carry out the measurements
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3. Schematics
The EB-GS3490 is composed mainly of GS3490, GS3440 and GS2988.
3.1 Schematics of GS3490 and Mode Set Dip Switches
R15
75Ω
R18
L1
R28
C12
100Ω
1μF
C7
R16
C8
470nF
VCC
VCC
R7
R8
R9
R10
R19
SDIN
9
AGC+
10
AGC-
32
VCC_32
DDON
DDOP
27
1kΩ
1kΩ
1kΩ
1kΩ
RXN
23
RXP
GS3490
1
4
5
11
20
21
24
25
SWDIP4
SW2
CDB1
RSV
NC_12
VEE_1
VEE_4
VEE_5
VEE_11
VEE_20
VEE_21
VEE_24
VEE_25
R25**
DNP
ON
30
EQ_BYPASS
EQ_SQ_ADJ
EQ_OP_CTL
CD_SD_EN
8
12
R11
R12
R13
R14
1
2
3
4
CD
13
14
15
16
8
7
6
5
SWDIP4
1
2
3
4
1
VCC
1
2
3
4
NC
NC
EQ_DISABLE
CD_ENABLE
22
EQ_DISABLE
CD_ENABLE
1kΩ
1kΩ
1kΩ
1kΩ
CD_SD_EN
J2
THHDR1X4
SWITCH LABELS
TXN
RSET
28
29
8
7
6
5
1
1
2
3
4
SW1
ON
TXP
19
SDIP
7
VCC
THHDR1X4
18
750Ω
J1
1
2
3
4
6
1μF
137Ω
2
R24
1
2
3
4
31
DDIN
7.5nH
75Ω
DDIP
SDOP
TAB TAB
RA
75Ω
C13
BNCRA
1
J3
SDI/O
SDON
3
4.7μF
8.2nH
VCC_31
U2
2
L4
26
R17
75Ω
VCC_26
L6
8.2nH
17
C4
10nF
VCC_17
C6
4.7μF
VCC
VCC
VCC
VCC
R22*
NP
R21*
NP
SWITCH LABELS
C11
C9
C10
C14
NC
RSV
EQ_BYPASS
CD_SD_EN
10nF
10nF
10nF
10nF
R23*
NP
R20
0Ω
*NP means Not Populated.
**DNP means Do Not Populate.
Please refer to the Bill of Materials for more details.
Figure 3-1: Schematics of GS3490 and Mode Set Dip Switches
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3.2 Schematics of GS2988 and GS3440
VCC
C28
4.7μF
1
J6
RA
SDO
C22
10nF
2
4.7μF
R37
VCC
14
EQ_EN
DISABLE
TAB
3 VEE
TAB
6
OSP
75Ω
C27
NC1
NC2
NC3
NC4
NC5
16
GS2988
SD/HD
5
7
8
13
15
CD_SD_EN 10
BNCRA
R36
11
U3
VCC
75Ω DIFFERENTIAL
L3
5.6nH
75Ω
SDO
DDI
12
R31 75Ω
2
SDO
R32
RXN
RSET
DDI
75Ω
4
750Ω 1
C21
RXP
10nF
C20
R27
VCC
9
VCC
10nF
VCC
OSPB1
L2
4.7nH
1μF 3
8
VCC
10nF
C29
DDO
SDI
DDO
11 TXP
10 TXN
SQ_ADJ
GS3440
R35
1kΩ
0Ω
4
14
5
6
OP_CTL
GAIN_SEL
SLEEP
CD
15
CDB2
AGC
AGC
1
470nF
R34
9
TAB TAB
L5
4.7nH
C24
SDI
VEE_A
75Ω
1μF 2
BYPASS
12 VEE_O
R29
C23
C25
1
R30
75Ω
RA
2
SDI
R33 37.4Ω
BNCRA
J4
VCC_O
7
VCC_A 16
U4
75Ω DIFFERENTIAL
13
C26
10nF
VCC
Figure 3-2: Schematics of GS2988 and GS3440
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3.3 Schematics of Power Posts and LEDs
3.3V SUPPLY
TP1
3.3V
TP2
GND
RED
BLACK
VCC
C2
10μF
C3
100nF
VCC
14
C1
100nF
VCC
U1
1
OSPB1
3
CDB1
5
CDB2
VCC
R6
9
D1
1Y
1A
2A
2Y
3A
3Y
SN74LVC04APW
4A
4Y
2
4
6
1
1
1
2
GREEN
D2
GREEN
D3
GREEN
LED LABELS
R3
OSP_CD
150Ω
2
R4
CD_IO
150Ω
2
R5
CD_EQ
150Ω
8
10kΩ
R1
11
5A
5Y
10
13
6A
6Y
12
10kΩ
R2
7
GND
10kΩ
Figure 3-3: Schematics of Power Posts and LEDs
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4. Board Layout
Figure 4-1: Layer One (Top) and Top Silkscreen
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Figure 4-2: Layer Two (Ground)
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Figure 4-3: Layer Three (Power)
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Figure 4-4: Layer Four (Bottom)
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5. Bill of Materials
Quantity
Reference Designator
Description
1
C1
Capacitor; ceramic 0.1μF 16V 10% X7R 0402
10
C4, C9, C10, C11, C14, C20, C21, C22, C26, C29
Capacitor; ceramic 10000pF 25V 10% X7R 0402
4
C7, C12, C23, C24
Capacitor; ceramic 1.0μF 10V 10% X5R 0402
2
C6, C13
Capacitor; ceramic 4.7μF 6.3V 20% X5R 0402
1
C2
Capacitor; ceramic 10μF 10V 10% X7R 1206
2
C8, C25
Capacitor; ceramic 0.1μF 16V 10% X7R 0402
2
C27, C28
Capacitor; ceramic 4.7μF 10V 10% X5R 0603
1
C3
Capacitor; ceramic 0.1μF 16V 10% X7R 0603
3
D1, D2, D3
LED; 1.6X0.8mm 568NM GRN CLR SMD
2
J1, J2
Connector; Header 4POS 0.100 SGL GOLD
3
J3, J4, J6
HD RA BNC 75Ω
1
L1
Inductor; 7.5nH 300mA 0402
2
L2, L5
Inductor; 4.7nH 300mA 0402
1
L3
Inductor; 5.6nH 300mA 0402
2
L4, L6
Inductor; 8.2nH 300mA 0402
3
R1, R2, R6
Resistor; 10kΩ 1/16W 1% 0402 SMD
8
R7, R8, R9, R10, R11, R12, R13, R14
Resistor; 1kΩ 1/16W 1% 0402 SMD
10
R15, R17, R18, R24, R29, R30, R31, R32, R36, R37
Resistor; 75Ω 1/16W 1% 0402 SMD
1
R16
Resistor; 137Ω 1/16W 1% 0402 SMD
2
R19, R27
Resistor; 750Ω 1/16W 1% 0402 SMD
2
R20, R34
Resistor; 0Ω 1/10W 5% 0402 SMD
1
R28
Resistor; 100Ω 1/16W 1% 0402 SMD
3
R3, R4, R5
Resistor; 150Ω 1/10W 1% 0603 SMD
1
R33
Resistor; 37.4Ω 1/16W 1% 0402 SMD
1
R35
Resistor; 1kΩ 1/16W 1% 0402 SMD
2
SW1, SW2
Switch; Tape Seal 4 POS SMD
1
TP1
Test Point; PC Multi Purpose Red
1
TP2
Test Point; PC Multi Purpose Black
1
U1
IC HEX Inverter 14-TSSOP
1
U2
GS3490 Configurable Adaptive Cable Equalizer/Cable Driver
1
U3
GS2988 Cable Driver, 3Gb/s, Dual Slew Rate
1
U4
GS3440 Extended Reach 3G/HD/SD Adaptive Cable Equalizer
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Quantity
Reference Designator
Description
Parts Not Populated
1
R21
Not Populated; It may be used with R20 to change the level of
EQ_OP_CTL pin, refer to GS3490 Data Sheet for more details
2
R22, R23
Not Populated; These may be used to adjust Squelch
Threshold (EQ_SQ_ADJ), refer to GS3490 Data Sheet for more
details
Do Not Populate
1
R25
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DOCUMENT IDENTIFICATION
CAUTION
USER GUIDE
ELECTROSTATIC SENSITIVE DEVICES
Information relating to this product and the application or design described
herein is believed to be reliable, however such information is provided as a
guide only and Semtech assumes no liability for any errors in this document, or
for the application or design described herein. Semtech reserves the right to
make changes to the product or this document at any time without notice.
DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A
STATIC-FREE WORKSTATION
© Semtech 2012
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright
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consequence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or
intellectual property rights. Semtech assumes no responsibility or liability whatsoever for any failure or unexpected
operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or
electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or
operation outside the specified range.
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Contact Information
Semtech Corporation
Gennum Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805) 498-2111, Fax: (805) 498-3804
www.semtech.com
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