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FAQs > Fanout/Signal Splitting > Answers

Q1:  Can I use a Tee for splitting a TTL signal, an ECL signal, an analog signal?

A1:  For low frequency TTL devices, such as the LS series, the TEE may be OK if short cables, no longer than 3ft, are used. It is definitely NO for any ECL devices.  A Tee is not recommended for analog signals at frequencies above 10 MHz.

See PRL-414, PRL-431, and PRL-434


Q2: Can I use a power divider for splitting a TTL signal, an ECL signal, an analog signal?

A2:  A power divider generally splits a signal into two equal parts, or 6 dB.  When a digital signal is split in half, it is no longer logic level compatible, and, therefore, a 6 dB power divider should not be used.  It is OK, however, for most analog signals, because one can always use amplifiers to recover the loss.

See PRL-812, PRL-812D, and PRL-814


Q3:  What is a Fanout device?

A3:  A Fanout device is an active device that makes multiple copies of the input signals.  A 1:4 Fanout Buffer, for example, produces four equal output signals from a given input signal.

See PRL-414, PRL-431, and PRL-434


Q4:  What kinds of Fanout devices do you make?

A4:  PRL has two ECL and one TTL Fanout Buffers.  The PRL-431 and PRL-434 are 1:2 and 1:4 ECL Fanout Buffers, respectively.  The PRL-414 is a 1:4 TTL Fanout Buffer.  These devices are all transmission line drivers.

See specific transmission line drivers: PRL-430, PRL-420ND/PD, PRL-450ND/PD, PRL-460NPD/PND, and PRL-470