Help with GPIB Switches specifications:
GPIB Protocol Compatibility
Back to Top
|
| ||
| GPIB Protocol Compatibility: | |||
| Your choices are... | |||
| IEEE 488.1 | Devices are compatible with ANSI/IEEE Standard 488-1975, more commonly known as IEEE 488.1. This standard defines the mechanical, electrical, and protocol specifications for the interconnection of programmable instruments. IEEE 488.1 also specifies that a GPIB network supports a maximum of 14 devices on the bus and a maximum data transfer rate of 1-MBps. | ||
| IEEE 488.2 | Devices are compatible with IEEE 488.2, an enhanced version of the original IEEE 488.1 Standard. Because IEEE 488.1 did not specify issues such as how data should be formatted, how the status of the bus should be reported, and how messages should be exchanged, Tektronix proposed a set of standard formats that became the basis of IEEE 488.2. Specifically, IEEE 488.2 standardizes data formats, status reporting, error handling, and controller commands. | ||
| HS488 | High Speed 488 (HS488) is a newer, faster protocol developed by National Instruments that accelerates data transfer rates up to 8-MBps using standard GPIB cables. HS488 is a superset of the original IEEE 488.1 standard implemented at the hardware level by an application-specific integrated circuit (ASIC). | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| |||
General Switch Specifications
Back to Top
|
|
| ||
| Switch Topology: |
There are three main types of functional topologies for switches:
| ||
| Your choices are... | |||
| General Purpose | General-purpose devices are simple switches that consist of independent and isolated relays or field-effect transistor (FET) switches. They can connect one input to one output. | ||
| Multiplexer | Multiplexers connect one input to several outputs, or several inputs to one output. | ||
| Matrix | Matrix switches have several inputs and several outputs. Any number of inputs can be connected to any number of outputs. | ||
| Other | Other combinations such multiplexer/matrix, a switch arrangement that can be connected as a multiplexer or as a matrix. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| |||
| Switch Type: | |||
| Your choices are... | |||
| Relay Switch | The switch has a mechanical relay to rout or switch signals. It is used to switch or scan high voltage signals. There are three types of products: armature, dry-reed, and mercury-wetted switches. The relay type can be SPST (single-pole or 1-wire, single-throw), SPDT (single-pole or 1-wire, double-throw), or DPDT (double-pole or 2-wire, double-throw). | ||
| Solid State Switch | Solid-state switches use transistors (FETs and others) to route or switch signals. They are used in applications that require high-speed scanning of low-level signals (±10 V). Because they do not have any moving parts, solid-state switches have a very long life. | ||
| RF Switch | RF switches are ideal for routing high-frequency signals. | ||
| Other | Other unlisted switch types such as optical switches. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| |||
| Relay Type: | The type of the mechanical relays of the switch. | ||
| Your choices are... | |||
| SPST | The relay type is single-pole, single-throw (SPST). There are two types of SPST relays: Form A (normally-open) and Form B (normally-closed). | ||
| SPDT | The relay type is single-pole, double-throw (SPDT). This contact type is also known as a Form C. | ||
| DPDT | Double-pole, double-throw (DPDT). | ||
| FETs | The switch is a solid-state device and the relay is a field-effect transistor (FET). | ||
| Other | Other types of relays. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| |||
Configuration
Back to Top
|
|
| ||
| Number of Input Channels | The number of input channels, or the number of GPIB controllers that the switch can handle. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
| Number of Output Channels | The number of output channels, or the number of GPIB buses controlled by the switch. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
Electrical Specifications
Back to Top
|
|
| ||
| Maximum AC Switchable Voltage | The maximum AC voltage (signals) that the device can switch. Generally this voltage is expressed in root mean square (RMS) values. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
| Maximum DC Switchable Voltage | The maximum DC voltage (signals) that the device can switch. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
| Maximum AC Switchable Current | The maximum AC current that the device can switch and still achieve full-rated life | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
| Maximum DC Switchable Current | The maximum DC current that the device can switch. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
| Maximum Real Switchable Power per Channel: | The maximum power in watts that the device can switch. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
| Maximum Reactive Switchable Power per Channel: | The maximum signal power in VA (Volt-Ampere) that the device can switch. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
| Bandwidth | The maximum frequency of the signal that can be switched without degrading the signal's quality. Normally, a device can switch signals with frequencies ranging from DC to this maximum specified frequency. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
| |||
Other Features
Back to Top
|
|
| ||
| Signal Propagation Delay | Signal propagation delay is the speed degradation (time delay) that occurs when a signal is transferred between GPIB networks via an expander. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
| |||
| External Indicators? | Devices include external indicators (normally LEDs) for states such as Talk, Listen, Receive, Send, Power, Ready, etc. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
| |||
| CE / FCC Certified? | Devices meet requirements of the European Union's CE Marking system and/or the U.S. Federal Communications Commission (FCC). | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
| |||
