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Switch Variable Delay Line

page v127
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/million°C from - 25°C to +85°C.

Part No.
50 Ohm
Impedance
V127Z050

V255Z050

Part No.
75 Ohm
Impedance
V127Z075 V255Z075
Maximum
Time Delay
(Nano-
seconds)
127 255
Allen Avionics Switch Variable
Individual
Delay Lines
(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
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.
255 East Second Street, Mineola, NY  11501
Phone: (516) 248-8080
Fax:
(516) 747-6724
E-Mail: Info@AllenAvionics.com

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