2 Ch. Translator, 50 Ohm NECL to 124 Ohm NECL

Applications:

• Extends the maximum range of the Sony DFC-1800 Variable Rate Buffer to 200 feet
• Also used for Metrum 64 Playback and Record Adapter

Features:

• GHz 100k ECLinPS Technology
• 600 MHz maximum clock rate
• Single-ended or differential 50 Ω/-2V input terminations
• Differential 124 Ω outputs
• Ready-to-use 1.3" x 2.9" x 3.9" module, including a ±8.5 V AC/DC adapter

Description

The PRL-433N is a dual channel NECL Interface Translators designed specifically for use with high speed recording instruments in satellite image transmission applications. The PRL-433N is the Recorder Record Translator. It is especially suited for interfacing with the SONY DFC-1800 Variable Rate Buffer used in the DIR-1000 recording system.

The differential inputs of the PRL-433N have SMA connectors. A switch selects either single-ended or differential inputs, as shown in Fig. 1. In the differential input mode, both inputs D and D are terminated internally into 50 Ω/-2 V, and, therefore, either one or both inputs can accept AC coupled signals as well. In the single-ended input mode, signals should be connected to the D inputs only. The D inputs are switched internally to V_BB, nominally -1.3 V, and termination resistors R_T for the D input channels are changed to 62 Ω.

The outputs of the PRL-433N have two triax connectors, and they are designed to interface with the 124 Ω differential Serial Data/Data and Clock/Clock inputs of the SONY DFC-1800. Internal pull-down resistors enable these outputs to drive differential 75 Ω loads as well.

The PRL-433N is housed in an attractive 1.3 x 2.9 x 3.9-in. extruded aluminum enclosure and supplied with a ±8.5 V AC/DC Adapter. If mounting is desired, a pair of 35001420 mounting brackets can accommodate two PRL modules of the same length. A number of PRL modules can also share a single ±8.5 V AC/DC adapter using the PRL-730 voltage distribution module.