DLS DLS 400A, Operating Manual

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INTRODUCTION
Page 1
1. INTRODUCTION
Thank you for choosing DLS TestWorks (Consultronics).
DLS TestWorks (Consultronics) has been in the wireline simulation business for over 20
years now. Since the days of the S2, DLS TestWorks (Consultronics) has designed many
new units to customers’ specifications and to conform to an ever-growing range of stand-
ards. With the introduction of the DLS 100 in 1985 we sold the world’s first truly wide-
band wireline simulator to successfully simulate attenuation, characteristic impedance and
delay.
1.1 About the DLS 400 ADSL Wireline Simulator
The DLS 400 simulates twisted pair copper cables, sometimes called wirelines, to high
frequencies. It provides over 30 different configurations of these cables. It is particularly
suitable for testing Asymmetrical Digital Subscriber Loop (ADSL) transmission products,
but can be used to test many other digital transmission products as well. The DLS 400
loop configurations address various testing requirements, depending on the model chosen
(A, H, N or HN):
The DLS 400A offers all the ADSL test loops specified by ANSI T1.413 and a collection
of other HDSL and ISDN test loops.
The DLS 400H offers all the loops necessary for testing to ANSI HDSL and HDSL2 spec-
ifications.
The DLS 400N offers all the loops necessary for testing to North American ADSL specifi-
cations, covering both ANSI and ITU G.lite loops. It also includes 5 TR 30.3 loops for
evaluating the interaction of DSL modems and voiceband products.
The DLS 400HN combines the loops of both the DLS 400H and the DLS 400N into one
single chassis.
In addition to the loop simulations, it is possible to add 1 or 2 wideband impairments gen-
erators, sometimes known as “impairments cards” to the unit. These allow the user to add
a wide variety of impairments to the signals at one end of the line, and test telecommuni-