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Model 8210A-2-5
IM-377
Aeroflex / Weinschel
19
The 8210A-2-5 currently supports up to 4 attenuator groups, each of which allow up to 32 physical or virtual
attenuators. During the setup process, the user assigns a name to the group, and lists the attenuators that comprise
the group, which may be stored in the8210A-2-5’s non-volatile EEPROM memory for future use. During the power-up
configuration process, the 8210A-2-5 will automatically recall and assign these group associations.
7-6. THE VIRTUAL SWITCH.
The Virtual Switch capabilities allow the user a convenient method of controlling
devices such as RF switches by specifying the switch control line connections and operational mode via the193-8015
8-Channel Relay Output card. Outputs from the card may be divided into logical groups of from one to eight control
signals. Each group is assigned a user-definable name, and maybe controlled separately from the other groups. This
would allow the user to connect, say 8 SPDT RF switches to the Relay Output card, and control each switch
independently without having to keep track of each switch’s individual position. Another feature, which is useful for
multi-line control applications, is the ability to specify whether the control signals in the group operate in an encoded
or decoded fashion. For example, a SP3T switch typically requires 3 individual control signals, only one of which may
be active at a time. These three control signals provide up to8 different programming codes from 000b to 111b, many
of which are actually invalid settings in this application. By operating in Decoded mode, the virtual switch will only
activate one output at a time, allowing the user to specify position 1, 2, or3 when programming.
The 8210A-2-5 supports up to 32 Virtual Switch devices, each of which can support up to a maximum of 16
output signals. The Virtual Switch uses the Switch Protocol command set. During the setup process, the user assigns
a name to the virtual switch, which may be stored in the 8210A-2-5’s non-volatile EEPROM memory for future use.
During the power-up configuration process, the8210A-2-5 will automatically recall and assign these virtual devices.
7-7. STATUS REPORTING.
The 8210 implements the 488.2 Status Reporting Structure, which utilizes the
IEEE488.1 status byte with additional data structures and rules. The Status Byte Register can be read with either a
serial poll (IEEE-488 operation only) or the *STB? common query command. The Service Request Enable Register
allows the user to select which bits in the Status Byte Register may cause service requests. A bit value of one
indicates that the corresponding event is enabled, while a bit value of zero disables an event. The Service Request
Enable Register may be accessed with the *SRE and *SRE? common commands. The Status Byte Register may be
cleared with the *CLS common command, with the exception of the MAV bit, which is controlled by the operation of
the Output Queue.
Status Byte Register/ Service Request Enable Register Formats
D7 D6 D5 D4 D3 D2 D1 D0
RQS ESB MAV
Bit Mnemonic
Description
6
RQS
Request Service: This bit, if set, indicates that the device is asserting the
SRQ
signal.
5
ESB
Event Status Bit: This bit is true when an enabled event in the Event Status
Register is true.
4
MAV
Message Available: This bit is true when there is valid data available in the
output
queue.
The Standard Event Status Register is used to report various IEEE488.2-defined events. The register
contents may be accessed with the *ESR? command. An Event Status Enable Register allows the user to select
which bits in the ESR that will be reflected in the ESB summary message bit of the Status Byte Register. The Event
Status Enable Register may be accessed with the *ESE and*ESE? common commands. The Event Status Register is
cleared by an *ESR? query or *CLS common command.
Содержание 8210A-2-5
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