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DS3150DK
Demo Kit for the DS3150 DS3/E3/STS-1 LIU
FEATURESSmall size: approximately 3" x 4"Soldered-down DS3150 in 48-pin TQFP
package for best signal integrityLine-side BNC connectors for Tx+/Tx- and
Rx+/Rx- differential pairsHigh-frequency 2:1 transformers on the
transmit and receive differential pairsCarefully designed layout for all analog signal
pathsSystem-side connector for TCLK/TPOS/TNEG, RCLK/RPOS/RNEG, MCLK, and
PRBS supports external data source/sinkJumpers to control EFE, ICE, LBKS*, LBO,
RMON, TDS0, TDS1/OFSEL, TESS, TTS,*
and ZCSE*Jumpers to connect TCLK to DS3 oscillator,
E3 oscillator or connector pinJumpers to connect MCLK to DS3 oscillator,
E3 oscillator, connector pin, VCC, or groundLEDs for DM* (red), LOS* (red), PRBS sync(green), and VDD (green)Banana jack connectors for VDD and GND
support use of lab power suppliesSilk-screened documentation for common
hardware modes on bottom side of the board
DESCRIPTIONThe DS3150DK is a small, self-contained evaluation kit for the DS3150 DS3/E3/STS-1 LIU. A soldered
DS3150 and careful layout of the analog-signal traces ensure maximum signal integrity. Jumpers on the
board allow the user to configure the DS3150 in any mode. LEDs indicate VCC present, loss of signal,
transmit driver failure, and PRBS sync. The board provides BNC connectors for the line-side transmit andreceive differential pairs and a header for various system-side signals. On-board oscillators serve as local
timing sources for DS3 and E3 operation. All jumpers, LEDs, and connectors are clearly labeled to make
the board as easy as possible to use.
PRELIMINARY
DS3150DK
Demo Kit for the
DS3150 DS3/E3/STS-1 LIU
DS3150DK
BOARD FLOOR PLAN Figure 1 shows the floor plan of the DS3150DK. The DS3150 is in the center of the board. The line-side
BNC connectors for the Tx and Rx differential pairs are at the bottom of the board, while the system
connector and configuration jumpers are at the top. The LEDs for DM*, LOS*, and PRBS are in the upper left-hand corner; the power supply connectors and power indicator LED are in the upper right. The
T3 and E3 oscillators sit to the right of the DS3150. All analog signal traces were carefully designed to
ensure signal integrity.
Figure 1. BOARD FLOOR PLAN DS3150DK
JUMPERS
Configuration Inputs. The jumpers on the DS3150DK allow the user to configure the DS3150 in any ofits operating modes (Figure 2). Each configuration input pin on the DS3150 has a corresponding jumper
to connect the pin to VDD or GND (or leave it floating). Silk-screen labels around the jumpers show that
the DS3150 configuration pins are wired to the center posts of the jumper sites. Additional boardmarkings indicate that a VCC rail is connected to the top post of each jumper site while a GND rail is
connected to the bottom posts. Jumpers JP3, JP5, JP7, JP8, JP9, JP10, JP11, JP12, JP13, and JP14 control
configuration input pins on the DS3150.
TCLK. On the right side of the board, jumper JP1 connects either the T3 oscillator output or the E3oscillator output to the intermediate node OSC. Install JP1 between top and middle posts for an E3 clock
or between the middle and bottom posts for a T3 clock. Install jumper JP2 to connect the DS3150 TCLK
pin to the OSC node. Leave JP2 uninstalled to source TCLK from the System Connector.
MCLK. Jumpers JP4 and JP6 control the DS3150 MCLK pin. Install jumper JP4 (and not JP6) toconnect the DS3150 MCLK pin to the OSC node. Install jumper JP6 (and not JP4) to connect the MCLK
pin to VCC or GND. Leave both JP4 and JP6 uninstalled to source MCLK from the System Connector.
Figure 2. DS3150DK JUMPERSEFE, ICE,
LBKS*, LBO,
RMON, TDS0,
TDS1/OFSEL,
TESS, TTS*
and ZCSE*
VDD
GND
OSC
MCLK
VDD
GND
OSCSYSTEM CONNECTOR
TCLKOSCSYSTEM CONNECTOR
DS3150DK
LINE-SIDE CONNECTIONSThe DS3150DK implements the Tx and Rx line-interface networks recommended in the DS3150 data
sheet and shown in Figure 3. To connect the DS3150 to DS3, E3, or STS-1 test equipment, connect the
equipment to BNC connectors J1 and J2 using coaxial cables. To externally loopback the DS3150 from
transmitter to receiver, connect J1 and J2 together through a length of cable or a cable simulator.
Figure 3. DS3150DK LINE SIDE CIRCUITRY
SYSTEM CONNECTORThe 16-pin System Connector at the top of the board gives access to the following DS3150 signals:
RPOS, TPOS, RNEG, TNEG, RCLK, TCLK, MCLK, and PRBS. Use the System Connector to connect
the DS3150 to an external framer or other data source/sink. To configure the DS3150DK board for an
external remote loopback, place TCLK-RCLK, TPOS-RPOS, and TNEG-RNEG jumpers (Figure 4).
Figure 4. SYSTEM CONNECTOR
POWER SUPPLY CONNECTORSGNDRPOS
GNDTPOS
GND RNEG
GNDTNEG
GNDRCLK
GNDTCLK
GND MCLK
GND PRBS
RECEIVE
TRANSMIT
DS3150DK
BASIC DS3150DK CONFIGURATIONTable 1, Table 2, and Table 3 list jumper settings for basic DS3150 configurations for T3, E3, and STS-1
modes, respectively. These example configurations provide a quick start to using the DS3150DK and
may not be the proper configuration for your specific application. To set up other DS3150 configurationswith the DS3150DK, refer to the DS3150 data sheet for more details about configuration pins and
options.
Table 1. BASIC T3 CONFIGURATION
DS3150DK
Table 2. BASIC E3 CONFIGURATION
