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SC75A375B-A Datasheet(PDF) 1 Page - Faraday Technology

Part # SC75A375B-A
Description  4 SWITCH CABLE CLONE
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Manufacturer  FARADAY [Faraday Technology]
Direct Link  http://www.faradaytech.com/
Logo FARADAY - Faraday Technology

SC75A375B-A Datasheet(HTML) 1 Page - Faraday Technology

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© Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice
Fara234d.doc
Page 1 of 2
May-02(C)
• Emulates cable up to 360 MHz
• Quick and easy to use
• Simulates more than 300 metres
• No power needed
• Fixed and Switched Programmable
• Pocket size
• Known accurate loss for repeatable performance
Order Code
Cable Type
Simulated Lengths
SC75A37B
SC75A045B-A
BELDEN 8281
5m + 10m + 10m + 20m
Cable Type
Switch 2
Switch 5
Switch 10
Switch 20
SC75A375B-A
BELDEN 8281
25m + 50m + 100m + 200m
BBC PSF 1/2M
25
50
100
200
SC75A045B-B
BBC PSF 1/2M
5m + 10m + 10m + 20m
BELDEN 8281
25
50
100
200
SC75A375B-B
BBC PCF 1/2M
25m + 50m + 100m + 200m
BBC PSF 1/3M
19
39
78
156
SC75A37B
see table opposite
RG59
18
36
72
144
4 SWITCH CABLE CLONE
SIMULATES THE EFFECT OF COAXIAL CABLE IN SERIAL DIGITAL SYSTEMS
In serial digital applications it is known that a signal
adhering to the amplitude specification of 800mV +
10% will maintain its integrity if the attenuation at the
Nyquist frequency is 30dB or less. It may then be
reconstituted correctly by, say, the Sony deserialiser.
The CABLE CLONE has similar attenuation vs
frequency characteristics to coax cable over the wide
frequency spectrum of the serial digital signal. When
installing or testing serial digital equipment it is often
necessary to establish the maximum length of cable
over which the signal will remain useable, or to ensure
there is sufficient margin (headroom) if a certain length
of cable is required. Most adaptive equalisers, in
deserialisers for example, rely on the attenuation
characteristics of the cable to operate correctly.
At present the only way to do this is to insert the actual
length of cable into the path. This is time consuming,
inconvenient and costly.
The Faraday CABLE CLONE is the solution to the
problem.
The CABLE CLONE emulates the loss and group
delay
frequency
characteristics
of
a
cable
to
approximately 360 MHz. It is supplied in a small metal
box fitted with BNC connectors which needs no power
supply. It my be carried in the pocket and is always
ready for immediate use.
By using the table on the reverse of the SC75A37B
box the user can relate the loss to lengths of various
types of cable.
Fixed CABLE CLONES of 1dB to 20dB and a Four
Switched Programmable version containing 2:5:10 and
20dB are available for all the various systems with
75
Ω for video and 50Ω for Ethernet. An Eight
Switched
Programmable
version
simulating
5:10:10:20:50:100:100 and 200 metres of Belden cable
is also available.
Apart from the smaller space requirements of the cable
clone (vs cable) it offers the advantage that comparable
measurements become possible since the influence of
manufacturing tolerances, customary in the case of
coaxial cables, is abolished.


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