Texas Instruments TLK1501, Руководство пользователя

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Typical Test and Setup Configurations
2-5
TLK1501 EVM Board Configuration
Figure 2–3. TLK1501 Serial PRBS BERT Test Configuration
Channel 1
TDS820 Digital
Oscilloscope
TX_EN
GTX_CLK
PRBS
2^7-1
TX–
RX–
RX+
TX+
GND
LOOPEN
TX_ER
ENABLE
LCKREFN
PRBSEN
TESTEN
GND
J7
TLK1501EVM
Evaluation Board
RD 0-15
PRBS_PASS
PRBS 2^7-1
CH1
HP83480 or
Tek 11801
Trigger
CH2
Digital
Oscilloscope
EXT
INPUT
HP8133A
Pulse Generator
Channel 1
O/P
TRIGGER
OUT
Data In
Serial BERT
HP7004A 3 Gbps
CLK OUT
Transmitter BERT
Receiver BERT
Data Out
Data Out
CLK/20
Jumper Selection
A board-to-board communication link is a practical method of evaluating the
TLK1501 in a system-like environment as shown in Figure 2–4. A Parallel
BERT or a logic analyzer can be used to provide and monitor signals to and
from the transceiver pairs. The BERT would need to configure the TX_ER and
TX_EN signals for data transmission before any data is sent. On the receive
side the RX_ER and RX_DV can monitor the device for errors. Both GTX_CLK
sources must have the same frequency within 200 PPM for asynchronous
operation. Synchronous operation can be achieved by using either the BERT
or a synchronized pulse generator to supply both boards with GTX_CLK
inputs.