User's Guide
May 2, 2002
7
11/06/09
Power Connections
The B LINK EVM can be powered from an ordinary DC laboratory bench power supply through the assist of a pair of
power supply cables with standard plug banana jacks.
•Set the power supply at 3.3 Vdc +/- 10%
•It is recommended that before making the power supply connections, the power supply be turned off
•Apply 3.3 volt jumper plug to EVM connector J6
•Apply Ground connection to EVM connector J7
•Application of power is indicated by an LED between the terminal posts.
It is advisable to maintain the power supply off until all SMA connections are made to preclude accidental shorting of
coaxial connectors with power jacks.
Basic Evaluation Setup
As shipped, the board is ready for operation. Jumpers interconnecting BS3 and BS4 have been installed, which connect
the parallel output bus from the Deserializer to the parallel input bus on the Serializer. Jumpers J11-J14 provide digital
and analog power to both devices. The board is configured to be in the active powered state with all data outputs enabled,
and jumpers installed for selecting the rising edge of the strobe clock . Once interconnected with test equipments as shown
in Figure 4, the board is ready for power application and evaluation.
The basic setup takes serial data applied through a serial BERT at the J1-J2 SMA connectors (or alternately RJ45
connector at J6)1; data and clock , recovered at the Deserializer device, are output on the BS3 header. Jumpers
interconnecting BS3 and BS4 provide parallel data and clock to the Serializer device, where data will is serialized and
output at J3-J4 SMA connectors.
An optional jumper wire, interconnecting the Deserializer’s LOCK output available at BS3-12 to pin 2 on JP8 or JP9
might be used to activate the rapid sync pattern generation option in the Serializer, the LOCK signal will go active low
indicating that the Deserializer has locked onto the input data stream and command the Serializer to resume with normal
data transmission.
Care should be taken to use matched electrical length cables for matched pair signals from and to a BERT or Scope to
ensure the quality of measurements.
This setup can be used to verify the functional integrity and operation of the devices, evaluate lock time, jitter transfer and
most timing parameters. The setup can with little modification be converted to effect other jitter evaluation and timing
measurements for both serializer and deserializer devices.
1Zero Ohm steering resistors installed R2, R4, R19 and R21 steer data to SMA connectors while moving these resistors to
R1, R2, R19&R20 makes serial data available at RJ45 connectors. Installing shorting bars in all resistor positions will
make the signal available at both; however reflections may occur on serial data streams due to stub effects.
