LeCroy 4616 16-Channel ECL/NIM/ECL Converter

OVERVIEW

The Model 4616 is simultaneously an ECL-to-NIM and a NIM-to-ECL converter, specially designed to fill the gap between the new growing ECL circuitry and the old NIM electronics. The Model 4616 is designed so that each channel can be used for both applications. When ECL complementary pulses have to be converted, the circuit provides three NIM outputs and an additional ECL output. When a NIM pulse has to be converted, it is sent in one of the NM outputs (now used as an input) while the other two NIM outputs are unconnected. Thus, the circuit provides a single complementary ECL output.

SPECIFICATIONS

Input Characteristics

ECL Inputs:

16, one per section, in a 2 x 17 pin connector; accept complementary ECL levels; typical threshold 200 mV.

NIM Inputs:

16, one per section, Lemo-type connector, to be chosen out of the three Lemo-type connectors in the channel; the other two have to be kept unconnected; input im- pedance 50 Ohm +/- 5%; reflections < 10% for input risetimes > 2 nsec.

Output Characteristics

ECL Outputs:

16, one per section, in a 2 x 17 pin connector; ECL complementary levels (- 0.8 V and - 1.7 V); risetime 2 nsec typical.

NIM Outputs:

48, three bridged outputs per section, Lemo-type connectors; quiescently at 0 mV, > - 700 mV into 3 x 50 Ohm loads, max. - 1.2 V into 1 x 50 Ohm load, during output; risetime 2 nsec typical.

General

Maximum Frequency: 150 MHz

Minimum Pulse Width:

ECL and NIM inputs/outputs 4 nsec.

Transit Times:

ECL input to NIM output <6 nsec.
ECL input to ECL output < 10.5 nsec.
NIM input to ECL output < 6.5 nsec.

Power Requirements:

- 6 V quiescently at 700 mA, with all loads connected and all channels activated max. 1.7 A.