Stanford Research Systems SIM900 Mainframe

The Stanford Research Systems SIM900 Mainframe is a versatile and robust platform designed to house up to eight Small Instrumentation Modules (SIM). It serves as the backbone for building a custom measurement system, providing power, computer interfaces, clock synchronization, and individual module status in a compact and rugged design.

Key Features

• Eight Module Slots: Accommodates up to eight single-width or double-width modules, allowing for a flexible and expandable setup.
• Remote Module Capability: Includes a ninth port for connecting a module that needs to be placed outside the mainframe, useful for experiments requiring close proximity to the test setup.
• Communication Interfaces: Equipped with RS-232 and optional GPIB (IEEE-488.2) interfaces for seamless communication with a host computer. Messages are routed based on port numbers, facilitating easy data management.
• 10 MHz Reference Input: Provides a master clock to synchronize all modules, with an optional input for phase-locking to an external 10 MHz reference.
• Cascade Multiple Mainframes: Allows cascading of multiple SIM900 mainframes for larger setups, all controlled through a single host interface.
• Start-Up Script Memory: Features a 4000-byte non-volatile memory for storing and executing start-up scripts, ensuring consistent initialization of all modules upon power-up.
• Independent Queues: Each port has independent 511-byte input and output queues to manage data flow efficiently.
• Eavesdrop RS-232 Port: Dedicated port for monitoring all communications, simplifying debugging and setup verification.
• Front Panel Indicators: LED indicators provide status information for the mainframe and installed modules, including host interface, timebase, communication status, start-up script, and power status.

Technical Specifications

• Power Supply: Provides well-regulated and filtered DC voltages (+/-5 V, +/-15 V, +24 V) to all modules.
• Clock Synchronization: 10 MHz master clock for module synchronization, with an optional external timebase input.
• Interfaces: RS-232 standard; optional GPIB.
• Control Software: All module parameters can be set and queried via the serial interface.

This unit is in good working condition and is tested to OEM critical specifications. Comes with a 30 day warranty, and we also offer a 7 day right of return (restocking fee may apply). We have been in business for over 25 years, our main focus is customer satisfaction by providing the highest quality of new or used test equipment. Please let us know if you have any questions.

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