EB-GS2993
Evaluation Board User Guide
55092 - 0
April 2010
4 of 10
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)
