24 Keysight M8040A High-Performance BERT Getting Started Guide
1 Introduction
CTRL IN A, B The data module has 2 control inputs at the front panel. The functionality of
each individual input can be selected.
• Error Add Input
Every rising edge at the input generates a single error in the output stream
by flipping a single bit. The maximum repetition rate is data rate divided by 4
times the vector size.
• Output Blanking
If the input level is above the threshold level pattern generation stops and
only 0’s are sent on data out. Normal operation resumes when the input
level is below the threshold.
• Electrical Idle
If the input level is above the threshold level the output amplifier enters
electrical idle. Normal operation resumes when the input level is below the
threshold.
CTRL OUT A, B The data module has 2 control output at the front panel. The functionality of this
output can be selected.
• Error Output
This signal can be used to trigger an external instrument to help in error
analysis. If an error occurs a single RZ pulse is generated with the width of
half a vector length. Continuous errors will result in a clock signal.
SYNC OUT A,B This output is used to synchronize two or more modules to a common system
clock. It is connected to the SYNC IN of the other module or to the M8192A if
more than two modules are used.
CLK IN Clock not used for M8045A.
REF CLK IN Reference clock input for applications that provide a host reference clock in the
range of 10 MHz … 16 GHz. It may be SSC modulated and is used as the
reference for the system clock of all TX and RX channels. A SSC tolerant PLL is
used to multiply the reference clock to the system clock.
REF CLK OUT The reference clock output is used to provide a 10 MHz or 100 MHz reference
clock to the DUT or other test equipment.
AUX IN Port not in use.
CLK OUT Differential clock output.
TRIG OUT This output is used to send a trigger signal to another connected device, such as
an oscilloscope.
CLK MOD IN Input for delay modulation of TRIG OUT and CLK OUT channel, always affects
both outputs.
SYS IN A, SYS IN B These are control inputs at system level and can be used to generate events for
the sequencer. The granularity is the vector size.
SYS OUT A, SYS OUT B These are control outputs at system level and can be used to signal events to
the DUT or external instruments. The granularity is the vector size.
Component Description
To Next Page
Loading...
Need help?
General
