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GENNUM EB-GS2993 User Manual

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Type: User Guide
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Pages: 10
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EB-GS2993

Evaluation Board User Guide

1 of 10

EB-GS2993
Evaluation Board User Guide
55092 - 0

April 2010

www.gennum.com

 


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EB-GS2993
Evaluation Board User Guide
55092 - 0

April 2010

2 of 10

Contents

General Description..........................................................................................................................................3
Evaluation Kit Contents...................................................................................................................................3
Overview ..............................................................................................................................................................3
1. Evaluation Board User Guide ....................................................................................................................4

1.1 SDI Inputs and Outputs  ..................................................................................................................4
1.2 Power ....................................................................................................................................................4
1.3 Switch Settings  ..................................................................................................................................5
1.4 Jumper Settings  .................................................................................................................................5
1.5 Potentiometer Settings ....................................................................................................................6

1.5.1 OP1_CTL, OP2_CTL Potentiometer Settings................................................................6
1.5.2 Squelch Adjust (SQ_ADJ) Potentiometer Settings .....................................................6

1.6 LED Indicator  .....................................................................................................................................7

2. Schematic.........................................................................................................................................................7
3. Board Layout...................................................................................................................................................8
4. Bill of Materials...............................................................................................................................................9

Version

ECR

Date

Changes and / or Modifications

0

154023

April 2010

New document.

 


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Evaluation Board User Guide
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General Description

The GS2993 evaluation package is designed to accelerate the evaluation process of the 
GS2993 Adaptive Cable Equalizer.

It is strongly recommended to read the GS2993 Data Sheet (Doc ID: 53966) before using 
this evaluation kit.

Evaluation Kit Contents

• Gennum EB-GS2993 Evaluation Board
• CD containing GS2993 Collateral

Overview

The purpose of the EB-GS2993 Evaluation Board is to evaluate the GS2993 Multi-rate 
Cable Equalizer. This device is designed to support SMPTE 424M, SMPTE 292M and 
SMPTE 259M serial digital video signals standards, and is optimized for performance at 
270Mb/s, 1.485Gb/s and 2.97Gb/s data rates.

EB-GS2993 Functional Block Diagram

SW2 GS2993

Inputs

SMA

SMA

SMA

SMA

BNC

GS2993

IRL

GS2993 Supply Connection

DDO1

DDO2

 


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April 2010

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1. Evaluation Board User Guide

Figure 1-1

 shows the inputs, outputs and power connections for the EB-GS2993.

Figure 1-1: GS2993 Evaluation Board (EB-GS2993)

1.1 SDI Inputs and Outputs

The GS2993 is a high-speed BiCMOS integrated circuit designed to equalize and restore 
signals received over 75Ω co-axial cables. The EB-GS2993 is the evaluation board for the 
GS2993. The EB-GS2993 features one 75Ω single-ended input through a BNC connector 
(SDI/J4), and two pairs of 100Ω differential outputs (DDO1/J5, DDO1/J6 and DDO2/J7, 
DDO2/J8) through SMA connectors.

1.2 Power

The EB-GS2993 features four power posts (3V3, GND, VCCO1, VCCO2). By default, the 
GS2993 can be powered with a single power supply connected to 3V3. Alternatively, the 
GS2993 outputs can be powered using a second and third power supply connected to 
VCCO1 and VCCO2. The power configuration jumpers VCCO1_SEL and VCCO2_SEL 
must be configured accordingly.

When the outputs are powered separately, the power supply can be set between 1.2V 
and 3.3V.

3V3

GND

LED_EN

(JP10)

SQ_ADJ (R28)

OP1_CTL (TP7)

SDI (J4)

DDO1 (J5)

DDO1 (J6)

DDO2 (J7)

DDO2 (J8)

VCCO1

VCCO2

SW2

SQ_ADJ (TP6)

CD (D3)

AUTOSLEEP (JP2)

VCCO1_SEL (JP8)

VCCO2_SEL (JP9)

OP1_CTL (R31)

OP2_CTL (R32)

OP2_CTL (TP8)

CLI (TP9)

 


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April 2010

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1.3 Switch Settings

A four-point dip switch (SW2) provides the GS2993’s input selection. The switch 
positions are marked on the silkscreen, and are described in 

Table 1-1

 below:

1.4 Jumper Settings

The jumpers on the EB-GS2993 board are described in the following tables:

Table 1-1: SW1 Settings

Switch Label

Switch OFF

Description

Switch ON

Description

GS

0

Gain Select off, no change in gain 

(default)

1

Gain Select on, 6dB gain

OP2EN

0

OUTPUT2 disabled

1

OUTPUT2 enabled (default)

OP1EN

1

OUTPUT1 enabled (default)

0

OUTPUT1 disabled

BP

0

Bypass off (default)

1

Bypass on

Table 1-2: AUTOSLEEP (JP7) Jumper Settings

Label

Connection

Description

Connected (default)

Enables the AUTOSLEEP function

Unconnected

Disables the AUTOSLEEP function

Table 1-3: VCCO1_SEL (JP8), VCCO2_SEL (JP9) Jumper Settings

Label

Connection

Description

SS (default)

Shared supply mode

EXT

Output uses a separate external supply

 


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1.5 Potentiometer Settings

Adjusting the potentiometers clockwise will decrease the voltage level at the SQ_ADJ 
and OP_CTL pins. Adjusting the potentiometers counter-clockwise will increase the 
voltage level at the SQ_ADJ and OP_CTL pins.

1.5.1 OP1_CTL, OP2_CTL Potentiometer Settings

The output control potentiometer settings are described in 

Table 1-5

 below:

1.5.2 Squelch Adjust (SQ_ADJ) Potentiometer Settings

There is one multi-turn potentiometer on the EB-GS2993 assigned for squelch adjust, 
which adjusts the voltage seen at the SQ_ADJ pin. This input adjusts the threshold of the 
CD pin. When the SQ_ADJ input is 0V, all cable lengths will be equalized. When the 
SQ_ADJ input is 3.3V, there will be no equalization regardless of the cable length. Please 
refer to the GS2993 Data Sheet for more details on carrier detect and squelch adjust.

Table 1-4: LED_EN (JP10) Jumper Settings

Label

Connection

Description

Connected (default)

LED is enabled

Unconnected

LED is disabled

Table 1-5: OP1_CTL, OP2_CTL Input Settings

Level

Swing

De-emphasis

Mute

Voltage

0

800mV

Off

N

0

1

800mV

2dB

N

1 x (VCC/8)

2

800mV

4dB

N

2 x (VCC/8)

3

800mV

6dB

N

3 x (VCC/8)

4

400mV

Off

N

4 x (VCC/8)

5

400mV

2dB

N

5 x (VCC/8)

6

400mV

4dB

N

6 x (VCC/8)

7

400mV

6dB

N

7 x (VCC/8)

8

400mV

N/A

Y

VCC

 


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Evaluation Board User Guide
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1.6 LED Indicator

D3 is the Carrier Detect LED for the GS2993. D3 is on when no carrier is detected and 
stays off otherwise. There is one LED_EN jumper which when disconnected, it disables 
the LED. This is useful when measuring system power dissipation.

2. Schematic

Figure 2-1: GS2993 Schematic

5

6

7

8

4

3

2

1

15

16

2

12

19

1

TAB

9

3

4

10

11

21

20

5

14

13

18

17

22

8

7

6

OP2_EN_93

BYPASS_93

OP1_EN_93

BYPASS_93

CDB_93

24

23

VCC_DIG_93 - DIGITAL SUPPLY

POWER SUPPLIES

LED ENABLE JUMPER

VCC_O2_93 - OUTPUT 2 SUPPLY

VCC_A_93 - INPUT SUPPLY

AUTOSLEEP

POWER SUPPLIES

VCC_O1_93 - OUTPUT 1 SUPPLY

VCC_LED_93 - LED SUPPLY SEPARATED FROM INPUT SUPPLY BY HEADER

10μF

100nF

10μF

100nF

VCC_O2_93

VCC_O1_93

100nF

37.4

VCC_A_93

4.7μF

SMA

SWDIP4

VCC_DIG_93

221

VCC_DIG_93

VCC_O1_93

TBD

WHITE

10nF

WHITE

SMA

100

BLACK

VCC_A_93

RED

WHITE

470nF

VCC_A_93

SMA

10nF

1μF

10NF

1μF

10nF

VCC_A_93

10nF

VCC_O2_93

SMA

4.7μF

MMBT3904

VCC_A_93

75

4.7μF

VCC_A_93

RED

14k

4.7μF

365

YELLOW

1.21K

GS2993

75

6.2nH

BNC

TBD

5.0K

YELLOW

5.0K

10nF

WHITE

5.0K

R11

R

10

R33

D3

R34

Q6

R31

C17

TP7

TP8

C34

C32

C31

C33

TP11

TP10

JP9

JP8

JP10

C35

C36

TP13

TP12

SW2

C23

C24

C25

R30

R32

R23

TP9

C18

C29

J8

C28

J7

J5

J6

C26

C27

C19

C20

R18

L4

R16

R17

L3

R15

J4

C21

U1

TP6

C16

JP7

TA

B

CD

SLEEP

CLI

OP1_EN

OP1_CTL

VCC_O1

DDO1

DDO1

VEE_O1

VEE_O2

DDO2

DDO2

VCC_O2

OP2_CTL

OP2_EN

SQ_ADJ

BYPASS

AGC

AGC

GAIN_SEL

SDI

SDI

VEE_A

VCC_A

1

ON

1

2

3

1

2

3

C

B

E

1

2

3

3

2

1

3

2

1

2

1

2

1

10μF

 


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Evaluation Board User Guide
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April 2010

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3. Board Layout

Figure 3-1: Layer 1 (Top Layer) and Top Silkscreen

Figure 3-2: Layer 2 (Ground)

Figure 3-3: Layer 3 (Power)

Figure 3-4: Layer 4 (Bottom)

 


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April 2010

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4. Bill of Materials

Table 4-1: Bill of Materials

Quantity

Reference Designator

Part

6

C16, C17, C18, C23, C24, 
C25

Capacitor, ceramic; 10,000pF, 16V, 10%, X7R 0402

2

C19, C20

Capacitor, ceramic; 1.0μF, 10V, X5R 0402

1

C21

Capacitor, ceramic; 0.47μF, 10V, X5R 0402

4

C26, C27, C28, C29

Capacitor, ceramic; 4.7μF, 10V, 10%, X5R 0603

3

C31, C32, C35

Capacitor, ceramic; 0.1μF, 16V, 10%, X7R 0603

3

C33, C34, C36

Capacitor, tantalum; 10μF, 10V, 10%, 3216/1206

1

D3

LED,  red;  SMD type 0603

1

J4

Connector; BNC, edge-mount, PCB 
(Cambridge C-SX-077)

4

J5, J6, J7, J8

Connector; SMA, edge-mount, short signal pin 
(Johnson 142-0791-881)

2

JP8, JP9

Connector; header 2mm single straight 36-position 
(3 positions used)

2

 JP7, JP10

Connector; header 2mm single straight 36-position 
(2 positions used)

1

L3

Inductor; 6.2nH, 300mA, 0402

1

Q6

Transistor; GP NPN AMP SOT23-3

1

R10

Resistor; 365Ω, 1/16W, 1%, 0402 SMD

2

R15, R17

Resistor; 75.0Ω, 1/16W, 1%, 0402 SMD

1

R11

Resistor; 1.21kΩ, 1/16W, 1%, 0402 SMD

1

R23

Resistor; 221Ω, 1/16W, 1%, 0402 SMD

1

R18

Resistor; 37.4Ω, 1/16W, 1%, 0402 SMD

1

R33

Resistor; 14.0kΩ, 1/16W, 1%, 0402 SMD

1

R34

Resistor; 100Ω, 1/16W, 1%, 0402 SMD

3

R30, R31, R32

Potentiometer; 5.0kΩ 1/4W 10% 4mm cermet top 
SMD 5-turn

1

SW2

Switch; tape seal 4-position SMD

4

TP6, TP7, TP8, TP9

Test Point, PC multi-purpose (white)

2

TP10, TP11

Test Point, PC multi-purpose (yellow)

1

TP12

Test Point, PC multi-purpose (red)

1

TP13

Test Point, PC multi-purpose (black)

1

U1

Gennum GS2993 3Gb/s Equalizer, 
QFN24-4X4X1MM-0P5MM

 


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OTTAWA

232 Herzberg Road, Suite 101 
Kanata, Ontario K2K 2A1 
Canada

Phone: +1 (613) 270-0458

Fax: +1 (613) 270-0429

CALGARY

3553 - 31st St. N.W., Suite 210 
Calgary, Alberta T2L 2K7 
Canada

Phone: +1 (403) 284-2672

UNITED KINGDOM

North Building, Walden Court  
Parsonage Lane,  
Bishop’s Stortford Hertfordshire, CM23 5DB 
United Kingdom

Phone: +44 1279 714170

Fax: +44 1279 714171

INDIA

#208(A), Nirmala Plaza, 
Airport Road, Forest Park Square 
Bhubaneswar 751009 
India

Phone: +91 (674) 653-4815

Fax: +91 (674) 259-5733

SNOWBUSH IP - A DIVISION OF GENNUM

439 University Ave. Suite 1700 
Toronto, Ontario M5G 1Y8 
Canada

Phone: +1 (416) 925-5643

Fax: +1 (416) 925-0581

E-mail: sales@snowbush.com

Web Site: 

http://www.snowbush.com

MEXICO

288-A Paseo de Maravillas 
Jesus Ma., Aguascalientes 
Mexico 20900

Phone: +1 (416) 848-0328

JAPAN KK

Shinjuku Green Tower Building 27F 
6-14-1, Nishi Shinjuku  
Shinjuku-ku, Tokyo, 160-0023  
Japan

Phone: +81 (03) 3349-5501

Fax: +81 (03) 3349-5505

E-mail: gennum-japan@gennum.com

Web Site:

 http://www.gennum.co.jp

TAIWAN

6F-4, No.51, Sec.2, Keelung Rd. 
Sinyi District, Taipei City 11502 
Taiwan R.O.C.

Phone: (886) 2-8732-8879

Fax: (886) 2-8732-8870

E-mail: gennum-taiwan@gennum.com

GERMANY

Hainbuchenstraße 2 
80935 Muenchen (Munich), Germany

Phone: +49-89-35831696

Fax: +49-89-35804653

E-mail: gennum-germany@gennum.com

NORTH AMERICA WESTERN REGION

691 South Milpitas Blvd., Suite #200 
Milpitas, CA 95035 
United States

Phone: +1 (408) 934-1301

Fax: +1 (408) 934-1029

E-mail: naw_sales@gennum.com

NORTH AMERICA EASTERN REGION

4281 Harvester Road  
Burlington, Ontario L7L 5M4 
Canada

Phone: +1 (905) 632-2996

Fax: +1 (905) 632-2055

E-mail: nae_sales@gennum.com

DOCUMENT IDENTIFICATION

EVALUATION BOARD USER GUIDE

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 Gennum assumes no liability for any errors in this document, or 
for the application or design described herein.   Gennum reserves the right to 
make changes to the product or this document at any time without notice.

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April 2010

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Gennum Corporation assumes no liability for any errors or omissions in this document, or for the use of the circuits or devices described herein. The sale of 
the circuit or device described herein does not imply any patent license, and Gennum makes no representation that the circuit or device is free from patent 
infringement.

All other trademarks mentioned are the properties of their respective owners.

GENNUM and the Gennum logo are registered trademarks of Gennum Corporation.

© Copyright 2010 Gennum Corporation.  All rights reserved. 

www.gennum.com

GENNUM CORPORATE HEADQUARTERS

4281 Harvester Road, Burlington, Ontario L7L 5M4 Canada

Phone: +1 (905) 632-2996 

Fax: +1 (905) 632-2055

E-mail: corporate@gennum.com

www.gennum.com

CAUTION

ELECTROSTATIC SENSITIVE DEVICES

DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A 
STATIC-FREE WORKSTATION