Product Description:4-Ch.Terminator/Translator, NECLtoGroundRef.

PRL-550NQ4X

Manufacturer Part NumberPRL-550NQ4X
DescriptionProduct Description:4-Ch.Terminator/Translator, NECLtoGroundRef.
ManufacturerPULSE RESEARCH LAB
PRL-550NQ4X datasheet
 


Specifications of PRL-550NQ4X

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PRL-550NQ4X/PRL-550PQ4X FOUR CHANNEL NECL/PECL
TERMINATORS
APPLICATIONS
Allow direct connection of NECL/PECL signals to 50Ω input
instruments
Provide standard 50Ω/V
terminations for NECL/PECL signals and
TT
Ground Referenced Outputs
Testing and monitoring GHz NECL/PECL signals in digital and
wireless communication applications
FEATURES
43 ps Typical Rise Time (8 GHz bandwidth)
50Ω/-2V Input Termination for NECL and 50Ω/3V for PECL
Ground Referenced Outputs protect sensitive instruments
SMA I/O connectors
4X attenuation
Self-contained 1.3 x 2.9 x 2.2-in. unit includes a ±8.5V AC/DC
Adapter
INTRODUCTION
NECL/PECL logic levels are offset from ground. Without proper level shifting, these logic signals can not be connected to ground
referenced 50Ω input instruments, such as sampling 'scopes, network analyzers, scanners and counters, etc. Otherwise, either the
NECL/PECL equipment outputs or the measurement instrument inputs may be made inoperative or damaged.
When driving a length of 50 Ω coaxial cable, an NECL/PECL output must be terminated into a 50 Ω load that is connected to a
terminating voltage V
= V
-2V. For NECL circuits operating with a supply voltage of either -5.2V or -4.5V, V
TT
CC
V
is equal to -2V. For PECL circuits, where the supply voltage V
TT
NECL/PECL Terminators are level translators which convert NECL/PECL signals into signals that can be connected to ground
referenced 50Ω input instruments and, at the same time, provide standard 50Ω/V
DESCRIPTION
The PRL-550NQ4X and PRL-550PQ4X are, respectively, Four Channel NECL and PECL Terminators. The PRL-550NQ4X is
designed to interface with NECL circuits operating with a -5.2V or -4.5V supply. Each input has an equivalent 50 Ω resistor
terminated to a voltage V
= -2V. The PRL-550PQ4X is designed to interface with PECL circuits operating with a +5V supply.
TT
Each input has an equivalent 50 Ω resistor terminated to a voltage V
direct connection to ground referenced 50 Ω input instruments as shown in Figs. 1 and 2, respectively. These near ground level
output signals* protect sensitive instruments and enhence measurement accuracy when these instruments are used.
Once an NECL or PECL signal is translated through a proper Terminator, it can be routed through 50Ω scanners and other high
frequency measuring instruments for processing. Each PRL-550NQ4X and PRL-550PQ4X Terminator is housed in an attractive
1.3 x 2.9 x 2.2-in. extruded aluminum enclosure and is supplied with a ±8.5V AC/DC Adapter.
Fig. 1 NECL driving a 50 Ω Ω Ω Ω input instrument
using the PRL-550NQ4X
PRL-550NQ4X
is +5V, V
is +3V.
CC
TT
teriminations required by NECL/PECL signals.
TT
= +3V. The outputs of these Terminators are designed for
TT
Fig. 2 PECL driving a 50 Ω Ω Ω Ω input instrument
using the PRL-550PQ4X
1234 Francisco Street, Torrance, CA 90502
Tel: 310-515-5330 Fax: 310-515-0068
Email:
sales@pulseresearchlab.com
is 0 V, and
CC
www.pulseresearchlab.com

PRL-550NQ4X Summary of contents

  • Page 1

    ... DESCRIPTION The PRL-550NQ4X and PRL-550PQ4X are, respectively, Four Channel NECL and PECL Terminators. The PRL-550NQ4X is designed to interface with NECL circuits operating with a -5.2V or -4.5V supply. Each input has an equivalent 50 Ω resistor terminated to a voltage V = -2V ...

  • Page 2

    ... Cross Talk ↔ chs @ 1.4 GHz Size Weight PRL-550NQ4X Block Diagram *The output offset and input termination voltages are factory set and V connected to an NECL/PECL device. When connected to an NECL/PECL device, the output low level will be slightly offset from ground depending on the low level output voltage of the connected device, which is typically Vcc-1.8 V. When its input is connected to an NECL or PECL device, the Terminator output Low level is typically +50 mV. ≤ ...