Q1: How do I divide a 10 MHz-300 MHz sine wave by
2 and output a TTL square wave?
A1: The PRL-260ANT is an 8-bit manually programmable frequency divider
that provides both NECL and TTL f/n outputs. The NECL input can accept an
AC-coupled sinewave using our PRL-SC-104 DC Block.
Q2: How do I convert a sine wave into an ECL/PECL signal?
A2: For small-amplitude signals (as small as 10 mV p-p) use the PRL-350ECL.
This a dual channel comparator with complementary ECL outputs. It is similar to the
PRL-350TTL but can be driven beyond
A PECL output version is also available via special order.
For larger signals (>200 mV p-p), most of our products with ECL or
PECL inputs will also receive an AC-coupled sinewave. For example, to
convert a sinewave to NECL, you can AC-couple into our PRL-430N
using our PRL-SC-104 DC Block. The
following products will receive AC-coupled sinewave inputs:
Q3: How do I convert a 160 MHz sine wave into a pair of
5 V square wave signals for driving 50 Ω loads?
A3: For small signals, use the complementary outputs of a PRL-350ECL
to drive two Variable Output Line Drivers (PRL-470A).
Each PRL-470A can deliver +5 V or -2.5 V into a 50 Ω
load. For a 0 to
5 V output, the PRL-470 has a 1 ns rise time and can operate up to
250 MHz. An output polarity switch will reverse the phase error
induced by driving the two line drivers with true and complement signals.
If the sinewave is more than 2 V p-p, then the PRL-350 is not
necessary; instead use a DC block to AC couple the sine wave into a
PRL-812, 6 dB splitter, and
from there drive the NECL inputs of the two PRL-470A's.