80A02 Eos/Esd Protection Module; 80A05 Electrical Clock Recovery Module - Tektronix DSA8300 Service Manual

Theory of Operation

80A02 EOS/ESD Protection Module

80A05 Electrical Clock Recovery Module

2–14
The 80A02 EOS/ESD (Electrical Over Stress/Electro-Static Discharge) protection
module works with any DSA8300 instrument and provides static electricity
damage protection to vulnerable sampling head input stages and/or other sensitive
elements.
The 80A02 EOS/ESD module has a 26 GHz bandwidth, making it possible
to provide static protection to a sensitive single input channel of a sampling
oscilloscope with very minimal speed degradation.
The 80A02 EOS/ESD module is designed to work with either the Tektronix P8018
probe for manual test station static protection as well as automated test stations.
The electrical clock recovery module is capable of performing clock recovery on
the input signal (signal input must meet data rate and format requirements), and
provides this signal as a trigger source to the DSA8300.
Front panel connectors provide a replica of the recovered clock signal.
The module uses one of two separate clock recovery circuits dependant on the
specified data rate. The single-ended or complementary input signals are split
with a 1:2 divider and routed to the two circuits.
The low bandwidth circuit recovers clock and data from input data in the 50 Mb/s
to 2.7 Gb/s range. The recovered clock from this circuit is routed directly to the
front panel and internal trigger.
The high bandwidth circuit recovers clock and data from input data in the 2.7 Gb/s
to 12.6 Gb/s range. The recovered clock to the front panel and internal trigger
signals are always clock/16.
With option 10G, the 10G recovered clock is also routed to the front panel.
There is one front panel indicator LED - Clock Recovery Enable. It indicates the
clock recovery circuitry is on and programmed to the requested bit rate.
DSA8300 Digital Serial Analyzer and Modules Service Manual