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EB-GS2993
Evaluation Board User Guide
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EB-GS2993
Evaluation Board User Guide
55092 - 0
April 2010
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EB-GS2993
Evaluation Board User Guide
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April 2010
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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 Conne
c
tion
DDO1
DDO2
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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:
GS
2993 Evaluation Board (EB-
GS
2993)
1.1 SDI Inputs and Outputs
The GS2993 is a high-speed BiCMOS integrated circuit designed to equalize and restore
signals received over 75
Ω
co-axial cables. The EB-GS2993 is the evaluation board for the
GS2993. The EB-GS2993 features one 75
Ω
single-ended input through a BNC connector
(SDI/J4), and two pairs of 100
Ω
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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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
G
ain
S
elect off, no change in gain
(default)
1
G
ain
S
elect on,
6
dB 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
C
onnected (default)
Enables the AUTO
S
LEEP function
Unconnected
Disables the AUTO
S
LEEP function
Table 1-3: VCCO1_SEL (JP8), VCCO2_SEL (JP9) Jumper Settings
Label
Connection
Description
SS
(default)
S
hared 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
C
onnected (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 (V
CC
/8)
2
800mV
4dB
N
2 x (V
CC
/8)
3
800mV
6
dB
N
3 x (V
CC
/8)
4
400mV
Off
N
4 x (V
CC
/8)
5
400mV
2dB
N
5 x (V
CC
/8)
6
400mV
4dB
N
6
x (V
CC
/8)
7
400mV
6
dB
N
7 x (V
CC
/8)
8
400mV
N/A
Y
V
CC
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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:
GS
2993
S
chematic
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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3. Board Layout
Figure 3-1: Layer 1 (Top Layer) and Top
S
ilkscreen
Figure 3-2: Layer 2 (
G
round)
Figure 3-3: Layer 3 (Power)
Figure 3-4: Layer 4 (Bottom)
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4. Bill of Materials
Table 4-1: Bill of Materials
Quantity
Reference Designator
Part
6
C
1
6
,
C
17,
C
18,
C
23,
C
24,
C
25
C
apacitor, ceramic; 10,000pF, 1
6
V, 10%, X7R 0402
2
C
19,
C
20
C
apacitor, ceramic; 1.0
μ
F, 10V, X5R 0402
1
C
21
C
apacitor, ceramic; 0.47
μ
F, 10V, X5R 0402
4
C
2
6
,
C
27,
C
28,
C
29
C
apacitor, ceramic; 4.7
μ
F, 10V, 10%, X5R 0
6
03
3
C
31,
C
32,
C
35
C
apacitor, ceramic; 0.1
μ
F, 1
6
V, 10%, X7R 0
6
03
3
C
33,
C
34,
C
3
6
C
apacitor, tantalum; 10
μ
F, 10V, 10%, 321
6
/120
6
1
D3
LED, red;
S
MD type 0
6
03
1
J
4
C
onnector; BN
C
, edge-mount, P
C
B
(
C
ambridge
C
-
S
X-077)
4
J
5,
J6
,
J
7,
J
8
C
onnector;
S
MA, edge-mount, short signal pin
(
J
ohnson 142-0791-881)
2
J
P8,
J
P9
C
onnector; header 2mm single straight 3
6
-position
(3 positions used)
2
J
P7,
J
P10
C
onnector; header 2mm single straight 3
6
-position
(2 positions used)
1
L3
Inductor;
6
.2nH, 300mA, 0402
1
Q
6
Transistor;
G
P NPN AMP
S
OT23-3
1
R10
Resistor; 3
6
5
Ω,
1/1
6
W, 1%, 0402
S
MD
2
R15, R17
Resistor; 75.0
Ω,
1/1
6
W, 1%, 0402
S
MD
1
R11
Resistor; 1.21k
Ω,
1/1
6
W, 1%, 0402
S
MD
1
R23
Resistor; 221
Ω,
1/1
6
W, 1%, 0402
S
MD
1
R18
Resistor; 37.4
Ω,
1/1
6
W, 1%, 0402
S
MD
1
R33
Resistor; 14.0k
Ω,
1/1
6
W, 1%, 0402
S
MD
1
R34
Resistor; 100
Ω,
1/1
6
W, 1%, 0402
S
MD
3
R30, R31, R32
Potentiometer; 5.0k
Ω
1/4W 10% 4mm cermet top
S
MD 5-turn
1
S
W2
S
witch; tape seal 4-position
S
MD
4
TP
6
, TP7, TP8, TP9
Test Point, P
C
multi-purpose (white)
2
TP10, TP11
Test Point, P
C
multi-purpose (yellow)
1
TP12
Test Point, P
C
multi-purpose (red)
1
TP13
Test Point, P
C
multi-purpose (black)
1
U1
G
ennum
GS
2993 3
G
b/s Equalizer,
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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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ennum
C
orporation 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
G
ennum makes no representation that the circuit or device is free from patent
infringement.
All other trademarks mentioned are the properties of their respective owners.
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ENNUM and the
G
ennum logo are registered trademarks of
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ennum
C
orporation.
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C
opyright 2010
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ennum
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orporation. All rights reserved.
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DO NOT OPEN PA
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OR HANDLE EX
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EPT AT A
S
TATI
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