FAQs about 124 Ω Signals
Q1: How do I drive a differential 124 Ω load connected to a Triax connector?
A1: If the load is associated with an NECL circuit, the PRL-432N, should be used. The PRL-432N is a dual channel differential 50 Ω NECL SMA input to 124 Ω NECL Triax output converter. If the load is ground-referenced, the PRL-422NECL should be used.
Q2: How do I convert 124 Ω RS-422 to 50 Ω NECL and back?
A2: The PRL-422RS, dual channel converter, converts 124 Ω Triax RS-422 signals to complementary 50 Ω SMA ECL signals. The PRL-422NECL, dual channel converter, converts single-ended or differential 50 Ω SMA ECL signals back to 124 Ω Triax RS-422 signals.
Q3: How do I convert 124 Ω ECL to 50 Ω ECL and back?
A3: The PRL-432N, dual channel converter, converts 124 Ω Triax ECL signals to 50 Ω SMA ECL signals. The PRL-433N, dual channel converter, converts single-ended or differential 50 Ω SMA ECL signals to 124 Ω Triax ECL signals.
Q4: How do I measure a signal coming out of a Triax connector?
A4: It is very unlikely that there is a scope with a differential Triax or Twinax input connector. The PRL-860DTR can be used to pick off a small percentage of the differential signal while allowing the Triax signal to be cabled to its intended 100 Ω or 124 Ω load, such as a PRL-425 series differential receiver or PRL-414RSTR fanout buffer.