Adtech/Spirent SX/14 Satellite Datalink Simulator
Adtech/Spirent SX/14 155.52
Megabit OC-3 Satellite Datalink Simulator
Rent me for $1750 a
Reliable testing up to 155.52 megabits per second
The Spirent SX Data Link Simulators create the same
delay and error characteristics caused by long distance terrestrial
and satellite data links. By providing very realistic simulations
of actual network conditions, they allow engineers to stress test
new equipment and network applications under repeatable and
controllable conditions. Utilizing dual-channel, full-duplex
operation, these simulators provide bi-directional testing with
programmable delays, random bit errors and burst errors. Multiple
delay and error events can be programmed into complex sequences to
simulate a wide variety of chronic and periodic conditions or
events such as peak traffic times and equipment overloads.
Typical simulator applications include testing the
operation, performance and reliability of multiplexers, bridges,
encrypters, network applications and other communications hardware
and software. When used for link simulation, these simulators
physically connect directly between two pieces of equipment to
replace conventional data links such as satellite connections, WANs
or telephone networks. They can also be used in line with a real
data link to add additional delays or errors or to simulate the
effects of adding an additional link to the system.
Each simulator has two separate channels to
simulate the bi-directional characteristics of a full-duplex data
link. Each channel operates independently and has both transmit and
receive functions. The SX/14 and models also permit different delay
and error settings for each direction of the full-duplex data
stream. Bypass and loopback modes can be selected whenever standard
bi-directional flow is not required.
Each channel uses a variable length
first-in-first-out delay buffer with user-selectable delay and data
rate parameters. These parameters set the length of this buffer
which in turn determines the amount of time it takes data to pass
through each channel. The maximum delay length depends on the data
rate (lower data rates permit longer maximum delays). At the lower
rates, delays up to 9,999 ms (just under 10 seconds) are possible.
Delays can be specified in milliseconds or bits depending on the
measurement requirements of the test.
Each channel has a and a The Random Error Generator
simulates background errors caused by Gaussian noise and is active
during gaps between error bursts. Random error rates can be from 1
x 10-12 to 1 error per bit for the SX/14 . The Random Error
Generator normally injects logical errors. However, the SX/14
models can also be set to inject BPVs (Bipolar Violations) when
bipolar interfaces such as DS1 are used.