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Aeroflex 8210A-2-5, Руководство по эксплуатации и установке, Страница: 15 / 56

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Model 8210A-2-5 

 

IM-377 

Aeroflex / Weinschel 

15

 

6.  DEVICE INTERFACE BUS (DIB) OPERATION 

6-1. GENERAL OPERATION:  

The Device Interface Bus is a serial bus that includes a physical layer based on the 

two-wire I

2

C serial bus developed by Philips, and several software layers. The software layers are based on the 

ACCESS.Bus protocols V2.2, and include a base protocol, and several specific device protocols, along with specific 
Weinschel extensions to control RF devices. 

The base protocol defines standard messages for device communication, device initialization, device 

identifications, address assignment, and a message protocol for device reports and control information.   

The DIB is based on two wires, serial data (SDA) and serial clock (SCL), which carry information between the 

devices connected to the bus. Following initialization, each device is recognized by a unique address and can operate 
as either a master transmitter or slave receiver. A master is the device which initiates a data transfer on the bus and 
generates the clock signals to permit that transfer.  The master device always transmits data to the slave. Any device 
addressed by the master is considered a slave. The DIB is a multi-master bus. Every device connected to the DIB is 
capable of being both a bus master and a bus slave. 

Both SDA and SCL are bi-directional lines, connected to a positive supply voltage via a current source or pull-

up resistor.  When the bus is free, both lines are HIGH. The output stages of devices connected to the bus have an 
open-drain or open collector in order to perform a wired-AND function. Data on the I

2

C bus can be transferred at a 

rate up to 100 kbit/s.  The number of device interfaces connected to the bus is dependent on the bus capacitance limit 
of 1000 pF, the overall bus length of 10 meters, and the current available to power the devices.   

The protocol of the messaging system used by the 8210A-2-5 uses available length format with five fields, 

including the destination address, source address, message length, 0 to 127 data bytes, and a checksum.   

Device Identification on the bus is provided by a unique 28-byte sequence that provides the protocol revision, 

vendor, module revision, 8 character module name, and a 32-bit device id.  For most devices, this device id is the 
serial number of the device, however, a non-serialized device may generate a random negative 32-bit number for use 
as an id. Device Capabilities is a set of information that describes the functional characteristics of the device, along 
with the proper API (Applications Programming Interface) to use in communicating with the device. The purpose of 
capabilities information is to allow the 8210A-2-5 to recognize and use the features of devices without prior knowledge 
of their particular implementation. Capabilities information provides a level of device independence and modularity.  
For example, consider two different types of attenuation devices, a step attenuator and a pin-diode attenuator.  While 
each device has its’ own unique set of characteristics, they both are capable of setting an attenuation value. By similar 
devices providing a consistent API to the 8210A-2-5, the user is freed from the concerns of the low-level programming 
required to control each device. 

Содержание 8210A-2-5

Страница 1: ...Operation Installation Manual SmartStep Programmable Attenuator Switch Controller Model 8210A 2 5 This documentation may not be reproduced in any form for any purpose unless authorized in writing by...

Страница 2: ...IONS 7 3 PHYSICAL DIMENSIONS 8 4 INSTALLATION 9 4 1 RACKMOUNTING 9 4 2 CONFIGURING THE 8210A 2 5 HARDWARE 9 5 SERIAL RS 232 RS 422 RS 488 OPERATION 10 5 1 SERIAL COMMUNICATIONS SETTINGS 10 11 5 2 SERI...

Страница 3: ...DS 37 38 7 19 DEVICE INTERFACE BUS CONTROL COMMANDS 38 7 20 BASE PROTOCOL COMMANDS 39 7 21 STEP ATTENUATOR PROTOCOL COMMANDS 40 41 7 22 SWITCH PROTOCOL COMMANDS 42 9 PROGRAMMING AND CONFIGURATION EXAM...

Страница 4: ...tStep Programmable Attenuator Switch Controller Figure 1 is designed to interface with Weinschel s line of SmartStep programmable attenuators and represents a new concept in device control application...

Страница 5: ...pping regulations damage claims must be collected by the consignee DO NOT return the equipment to Aeroflex Weinschel until a claim for damages has been established 1 5 RESHIPMENT Use the best packagin...

Страница 6: ...xt all of that procedure is considered an ESDS device handling procedure 1 9 ABBREVIATIONS AND ACRONYMS The following list contains abbreviations used throughout this manual Abbreviations and acronyms...

Страница 7: ...S CTS DTR GND Baud Rates 2400 9600 19200 and 38400 Data Bits 8 Handshaking None RTS CTS XON XOFF Parity None Odd Even Indicators Tx Transmit and Rx Receive RS 422 Bus 2 RS 485 Bus 3 Connector 9 pin ma...

Страница 8: ...Model 8210A 2 5 IM 377 Aeroflex Weinschel 8 3 PHYSICAL DIMENSIONS Note All dimensions are given in mm inches and are maximum unless specified...

Страница 9: ...troller to the Model 8210A 2 5 X s bus connector For specific connector details reference the following Model Bus Type Paragraph 8210A 2 5 2 RS 232 5 3 8210A 2 5 2 RS 422 485 5 4 c Using the interconn...

Страница 10: ...s including baud rate parity and handshaking Refer to Figure 4 for switch location To configure the serial communications parameters select the appropriate switch setting using the table located in be...

Страница 11: ...OFF User Select RXD Termination On Termination Off No Termination 3 OFF ON RI RTS Select 4 ON OFF Serial Mode On RS232 Off RS422 The data format includes a start bit eight data bits and one stop bit...

Страница 12: ...ta This signal should be connected to the external computer s CTS input signal so that when the receiver is ready the transmitter may send data When the unit is not ready for data it unasserts the RTS...

Страница 13: ...clarity the signal names and directions are relative to the 8210A 2 5 Pin Signal Name Description Direction 1 DCD unused 2 RxD Receive data input 3 TxD Transmit data output 4 DTR Signals DTE is on lin...

Страница 14: ...ed The RS422 port utilizes a 9 pin connector The pin out for the connector is show below For clarity the signal names and directions are relative to the8210A 2 5 The signals are electrically compatibl...

Страница 15: ...in or open collector in order to perform a wired AND function Data on the I2 C bus can be transferred at a rate up to 100 kbit s The number of device interfaces connected to the bus is dependent on th...

Страница 16: ...25 square post header 0 1 centers and is located on the front panel of the Model 8210A 2 5 and mates with AMP connector P N 746285 2 or equivalent Name Pin Description VIN 1 2 dc Supply Voltage 5 V GN...

Страница 17: ...s will extinguish unless a configuration discrepancy is encountered in which case they will remain illuminated As can be seen from the above discussion the assignment of addresses to devices during t...

Страница 18: ...change perhaps a larger attenuation range or a different step size these algorithms would have to change accordingly The 8210A 2 5 provides a solution to this dilemma with the ability to create and d...

Страница 19: ...imum 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 vola...

Страница 20: ...an OPC command It indicates that the ITS 2000 has completed all pending operations The Status Reporting Registers may be used for serial communications with certain limitations The Status Byte Regist...

Страница 21: ...gle quote or double quote character in order to distinguish the string from a numeric data type Examples ATTEN1 ON 150T Integer Numeric Program Data This data type is used to represent integer binary...

Страница 22: ...mmands in the same program message the data resulting from each of the individual message units will be separated by an ASCII comma 2CH character 7 8 4 NOTATIONAL CONVENTION Brackets indicate optional...

Страница 23: ...n Value reg integer register Example s ESR returns the following 128 SRE Function Sets the Status Byte Enable Register Syntax SRE mask Argument s mask integer bitmask Remarks This function is used to...

Страница 24: ...of command completion by including the command as the last one in a series of commands Return Value 1 integer command completed Example s SAVE ASSIGN OPC returns a 1 when the SAVE ASSIGN command compl...

Страница 25: ...name Argument s name string10 device name Remarks This function is used to read the device model and serialno parameters associated with an assignment previously set using the ASSIGN command Return Va...

Страница 26: ...ains a count of the devices installed and for each the device name model id and address The name returned is the device name assigned via the ASSIGN command If the device does not have an assigned nam...

Страница 27: ...hecks for presence of a device Syntax ISPRESENT type name Argument s type optional string literal DEVICE ATTN or SWITCH name string10 device name physical or virtual Remarks This function is used to c...

Страница 28: ...sociated with name and for each the device name Return Value count integer count of device names devname string10 device name Example s ASSIGN ATTN Chan1 returns the following 2 AT1 AT2 COUNT ATTN Fun...

Страница 29: ...ument s name string10 attenuator or group name Remarks This function is used to set the reference level of the attenuator specified by name to the device s current setting This command may be used wit...

Страница 30: ...physical and virtual attenuation devices supporting the AttnProtocol The parameter name must have been previously assigned using either the ASSIGN or ASSIGN ATTN command Return Value atten real attenu...

Страница 31: ...r name This command may be used with both physical and virtual attenuation devices supporting the AttnProtocol The parameter name must have been previously assigned using either the ASSIGN or ASSIGN A...

Страница 32: ...and mode Return Value devname string10 device name mask integer16 output mask mode integer operational mode 0 Encoded 1Decoded Example s ASSIGN SWITCH Rfswitch returns the following SW1 7 1 LIST ASSIG...

Страница 33: ...ion Read switch setting Syntax SWITCH name specific form or SWITCH non specific form Argument s name string10 switch name Remarks In the specific form this function reads the setting of switch name Th...

Страница 34: ...t the assignment does not take effect until the next time device names are reassigned see REASSIGN Return Value none Example s GROUP Group1 AT1 AT2 AT3 AT4 AT5 GROUP Function reads a group assignment...

Страница 35: ...an internal command the macro replaces the internal command Macro expansion may be enabled disabled with the EMC command Return Value none Example s MACRO POWERON EMC 0 ATTN 1 EMC 1 MACRO Function Rea...

Страница 36: ...configuration or macros into non volatile memory Syntax SAVE ASSIGN Saves device assignments SAVE ASSIGN ATTN Saves virtual attenuator assignments SAVE ASSIGN SWITCH Saves virtual switch assignments S...

Страница 37: ...cal front panel keyboard enable disable Remarks This function can be used to enable disable the front panel keyboard functions for those systems incorporating a local keyboard This command is useful f...

Страница 38: ...ne termination character s used during RS232 operation By default the 8210A 2 5 uses the ASCII CR LF sequence 0x0D 0x0A when sending information The eos parameter can be used to specify a new terminat...

Страница 39: ...ng fields Protocol Rev char Module Version 7 bytes Manufacturer 8 bytes Module Name 8 bytes ID 32 bit integer Example s DEVICE GETID 4 returns B V1 00A Weinshel 150T 70 0x67000000 DEVICE GETCAP Functi...

Страница 40: ...the bit pattern specified Return Value none Example s DEVICE PROG 4 0xAA DEVICE PROG Function Reads the program word cell bit pattern of a device Syntax DEVICE PROG addr Argument s addr integer addres...

Страница 41: ...READ COUNTER addr cellno Argument s addr integer address relay byte relay 1 8 Remarks This function is used to read the setting of the device s relay switching counter which records the total number o...

Страница 42: ...y those outputs with a mask value of 1 will be effected Return Value none Example s DEVICE SETMASK 4 7 0x0F DEVICE RELAY Function Sets the specified output relay on off Syntax DEVICE RELAY addr relay...

Страница 43: ...ators Send ASSIGN AT1 3200T 1 101 ASSIGN AT2 3200T 1 102 b Save these names in the non volatile EEPROM memory Send SAVE ASSIGN c Optionally set the number of devices to expect during configuration and...

Страница 44: ...GN SAVE ASSIGN ATTN d Rerun the device assignment to associate the newly defined names with the attenuators Send REASSIGN To see the effect of the virtual attenuator query the attenuator s capability...

Страница 45: ...volatile EEPROM memory Send SAVE ASSIGN SAVE GROUP d Rerun the device assignment to associate the newly defined names with the attenuators Send REASSIGN The channels may now be programmed using the fo...

Страница 46: ...1 102 ASSIGN AT3 3200T 1 103 ASSIGN AT4 3200T 1 104 ASSIGN AT5 3201T 4 201 ASSIGN AT6 3201T 4 202 ASSIGN AT7 3201T 4 203 ASSIGN AT8 3201T 4 204 b Assign the four virtual names Send ASSIGN ATTN CH1 AT1...

Страница 47: ...r of the Relay Output Card PN 193 8015 is serial number 110 We will assign the name RLYBD to the Relay Card We will use three outputs from the Relay Card Relay Outputs 1 3 to control the switches whic...

Страница 48: ...1 4 bits 0 1 2 3 is 0000 1111 binary 0x0f Specify decode mode operation so that only one output asserts at a time Send ASSIGN SWITCH SW1 RLYBD 0x0f DECODE c Create the virtual switch for the RF switch...

Страница 49: ...as shown below Output SW1 SW2 SW3 1 0 0 0 2 0 1 0 3 1 0 0 4 1 0 1 To select an output you could send the individual programming commands to each of the switches for example to select output 4 you woul...

Страница 50: ...5 range from providing control of a single SmartStep Attenuator in a bench test lab environment using a PC and a terminal emulator to complex system applications where the 8210A 2 5 is employed to co...

Страница 51: ...RODUCTS Aeroflex Weinschel Inc warrants each product it manufactures to be free from defects in material and workmanship under normal use and service anywhere in the world Aeroflex Weinschel s only ob...

Страница 52: ......

Страница 53: ...DELETE DEVICE abbr DEV DRIVER ECHO EEPROM EMC ENAREPORT ENCODE EOS ERASE DECR DISPLAY FORMAT GETCAP GETID GPIB GROUP HEX IDN IDWAIT IN INCR INPORT IOMODE ISPRESENT ISKEYWORD LED LIST LOCKOUT MACRO MA...

Страница 54: ...PROGRAM HEADER QUERY PROGRAM HEADER PROGRAM HEADER SEPARATOR PROGRAM DATA SEPARATOR PROGRAM DATA DECIMAL NUMERIC PROGRAM DATA CHARACTER PROGRAM DATA 7 Buffer size limitations for block data not implem...

Страница 55: ...ion Record REVISION DATE DESCRIPTION APPLICABLE SERIAL NUMBERS A 9 03 Initial Issue All Units B 4 04 Company Name change to Aeroflex Weinschel All Units C 1 10 Corrected callout error on page 16 from...

Страница 56: ...onforms with the protection requirements of Council Directive 89 336 EEC and the Amending Directive 93 68 EEC relating to Electromagnetic Compatibility by the application of EN50081 1 1992 Generic Emi...

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