3D9950
8-BIT ADJUSTABLE, COAXIAL
PASSIVE DELAY LINE
(SERIES 3D9950)
FEATURES
Delay adjustable in 255 steps
Delay step sizes of 0.25ns to 1ns available
Fast rise time for high frequency applications
I/O reversible
BNC female connectors
Meets or exceeds MIL-D-23859C
PACKAGE
FUNCTIONAL DESCRIPTION
PIN DESCRIPTIONS
The 3D9950 device is a single-input, single-output, passive delay line.
IN
Signal Input (BNC)
The signal input (IN) is reproduced at the output (OUT), shifted by a time
OUT Signal Output (BNC)
(T
D
) which can be adjusted via eight binary-weighted switches. The value
of these switches, multiplied by the device dash number, determines the
device delay (referenced to the delay with all the switches off). The device is offered in 50-ohm and 75-ohm
impedance versions.
SERIES SPECIFICATIONS
Delay Tolerance:
Minimum Delay
(all switches off):
Impedance:
Ripple in pass-band:
Dielectric breakdown:
Operating temp:
Temperature coeff:
Case dimensions:
2%
2.5ns
50Ω or 75Ω
Approx. 0.2dB
100 VDC
-65C to +125C
<100 PPM/C
8.5” W x 8.0” D x 2.0” H
(21.6cm x 20.3cm x 5.1cm)
DASH NUMBER SPECIFICATIONS
Part
Number
3D9950-0.25A
3D9950-0.5A
3D9950-1A
3D9950-0.25Y
3D9950-0.5Y
3D9950-1Y
Delay
Step
(ns)
0.25
0.5
1.0
0.25
0.5
1.0
Delay
Range
(ns)
63.75
127.5
255.0
63.75
127.5
255.0
Imped-
ance
(Ω)
50
50
50
75
75
75
3dB
B.W.
(MHz)
125
125
125
125
125
125
Note: 3dB BW measured at maximum delay
2014
Data Delay Devices
Doc #14023
1/5/2015
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
3D9950
PASSIVE DELAY LINE TEST SPECIFICATIONS
TEST CONDITIONS
INPUT:
Ambient Temperature:
Input Pulse:
Source Impedance:
Rise/Fall Time:
Pulse Width:
Period:
25 C
3 C
High = +0.5V typical
Low = -0.5V typical
50 Max.
3.0 ns Max. (measured
at 10% and 90% levels)
PW
IN
= 100ns
PER
IN
= 1000ns
o
o
OUTPUT:
R
load
:
C
load
:
Threshold:
10M
10pf
50% (Rising & Falling)
NOTE:
The above conditions are for test only and do not in any way restrict the operation of the device.
OUT
PULSE
GENERATOR
TRIG
R
IN
IN
DEVICE UNDER
TEST (DUT)
OUT
IN
TRIG
OSCILLOSCOP
E
50
R
IN
= R
OUT
= Z
LINE
R
OUT
Test Setup (Delay Measurements)
OUT
IN R
IN A
NETWORK
ANALYZER
(HP 3577A)
IN B
RF
Coax
Coax
50-OHM
SIGNAL
DIVIDER
OUT R
(HP 35676
-66301)
OUT A
OUT B
IN
Coax
IMPEDANCE
MATCHING
NETWORK
Coax
IMPEDANCE
MATCHING
NETWORK
IN
GND
DEVICE
UNDER
TEST
OUT
GND
Test Setup (Frequency Response)
Doc #14023
1/5/2015
DATA DELAY DEVICES, INC.
Tel: 973-773-2299
Fax: 973-773-9672
http://www.datadelay.com
2
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