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Switch Variable Delay Line
page GPDL/V127
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The "Nanno Switch"

Switch Variable Delay Line

As a result of the demand for switch variable delays in the nanosecond range, Allen Avionics has designed these delay lines. These units consist of individual delay lines each having its own switch. The time delay is changed by switching one or more individual delay lines in series with the input and output connections.

The delayed output is always the summation of individual delay lines and not the result of a tapped line. This feature is an important factor in eliminating undesirable reflections in the output pulse. BNC female connectors are supplied for input and output terminations.

Delay Tolerance at any setting:
           5% or 1 nanosecond, whichever is greater.

Distortion:
           3% maximum with 20 nanosecond input rise time.

Temperature Coefficient:
           50 parts/millionC from - 25C to +85C.

Part No.
50 Ohm
Impedance
V127Z050

V255Z050

Part No.
75 Ohm
Impedance
V127Z075 V255Z075

Maximum
Time Delay
(Nano-
seconds)

127 255

Maximum
Time Delay
(Nano-
seconds)

1, 2, 4, 8, 16, 32, 64
nanoseconds
1, 2, 4, 8, 16, 32, 64, 128
nanoseconds
Rise Time at maximum delay 14 nanoseconds 16 nanoseconds

Allen Avionics Switch Variable

Frequency Response at maximum delay -1dB @ 12.5 MHz
-3dB @ 25.0 MHz
-1dB @ 11 MHz
-3dB @ 22 MHz
Attenuation 5% Maximum 8% Maximum

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Allen Avionics, Inc.
2727 Clinton Street
River Grove, IL  60171
Phone: (708)-453-3238
Fax: (708)-453-0297
E-Mail: Sales@AllenAvionics.com

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