Model 556B Acquisition Interface Module
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Features PHA acquisition server with Ethernet interface Model 556B Acquisition Interface Module High speed acquisition – up to 1 MHz data acceptance rate 64K, 32-bit channels of local acquisition memory PHA and Loss-Free PHA acquisition modes Fast spectral data transfers using Ethernet Host interface for controlling the programmable ICB NIM Family Live spectral displays and complete front end programmability through any Genie™ family workstation Description The CANBERRA Model 556B Acquisition Interface Module (AIM), serves as a link between a host computer and signal processing NIM. This NIM can be configured with manual and/or programmable versions of CANBERRA’s ADC, AMP, DSP, HVPS, AMX, RPI building blocks to tailor the system to the needs of any application. A single AIM, in conjunction with a Genie family workstation, can control a whole bin of programmable NIM for total computer front-end configuration and control. The 556B AIM, a single-width NIM, has a 10/100 fast Ethernet interface with 10 Base-T and 100 Base-TX transceivers conforming to IEEE 802.2/802.3 communication standards. The module has been designed with two high-speed ADC ports and an Instrument Control Bus (ICB) for programmable front-end NIM units. Connected to an Ethernet network, the 556B allows data acquisition from any computer on the network. The 556B AIM can acquire data in PHA or Loss-Free PHA mode from either ADC port independently. The AIM contains 64K, 32-bit channels of local acquisition memory and can acquire data from both ADCs at a maximum aggregate rate of 1 MHz (500 kHz for a single input). Preset and elapsed times are maintained within the module with centisecond resolution. The AIM will automatically terminate acquisition upon reaching the preset live or real time or a preset total counts in a region. If module power is lost, the spectral memory will be retained for up to 20 years. An optional sample changer interface is available for ADC 1. External start/stop control can be provided for both ADCs with an optional cable. Specifications INPUTS/OUTPUTS ADC1 and ADC2 (Data acquisition) – 34-pin ADC standard. ETHERNET – RJ-45 jack provides connection to network through 10 Base-T and 100 Base-TX transceivers. ■ ICB (Instrument Control Bus) – Provides Host access to ICB Bus. ■ RS-232 – Terminal I/O for diagnostic functions. ■ ■ ADC TRANSFER TIME – Internal jumper plugs to select transfer times compatible with cable length to each ADC. Factory set for 1 µs (≤4.6 m). Other selections are: 0.75 µs, 1.5 µs, 2 µs. Can be set independently for ADC1 and ADC2. Nuclear Measurement Solutions for Safety, Security and the Environment 

Model 556B Acquisition Interface Module FRONT PANEL INDICATORS ERROR – LED indicates a hard, non-recoverable error (continuously lit) or soft error (blinks for 60 s on startup) in the module. ■ OK – LED; indicates module is operational. ■ TEST – LED; indicates module is in internal test mode. ■ COMM TX – LED; indicates module is sending data to host. ■ COMM RX – LED; indicates module is receiving data from host. ■ IN USE – LED; indicates host has put module on-line. ■ ACQUIRE – LEDs for ADC ports 1 and 2; indicates corresponding port is acquiring data. ■ ACTIVE – LEDs for ADC ports 1 and 2;...