1. PERSPECTIVE ON MICROWAVE MONITOR AND CONTROL INTERFACES
Wayne Miller
**********
INSIGHT FROM FOUR DECADES
OF ONGOING INDUSTRY DESIGN
AT SYSTEM AND COMPONENT LEVELS

2. SYSTEM WITH MONITOR AND CONTROL INTERFACE DISTINCTIONS
SYSTEM CONTROLLER
SYSTEM SIDE
INTERFACE
SYSTEM SIDE
INTERFACE
SYSTEM SIDE
INTERFACE
INTERFACE
SPECIFICATION
INTERFACE
SPECIFICATION
INTERFACE
SPECIFICATION
COMPONENT SIDE
INTERFACE
COMPONENT SIDE
INTERFACE
COMPONENT SIDE
INTERFACE
INDIVIDUAL
COMPONENT
INDIVIDUAL
COMPONENT
INDIVIDUAL
COMPONENT

3. SPECIFICATIONS AND COMPONENT SIDE INTERFACES FOR CONTROL OF SELECT COMPONENTS
SYSTEM CONTROLLER
SYSTEM SIDE INTERFACE
SYSTEM SIDE INTERFACE
SYSTEM SIDE INTERFACE
LOGIC LEVELS,
TRUTH TABLE
ANALOG VOLTAGE,
TRANSFER FUNCTION,
LOGIC LEVELS
SOLENOID PARAMETERS, MOTOR PARAMETERS,
DRIVE INTERFACE, TIMING, TRANSFER FUNCTION
LOGIC BUFFERS,
TRANSLATORS,
DECODERS
BUFFER,
LINEARIZER,
DAC
DRIVERS, TIMERS,, POWER CONTROLLER, POSITION SENSORS, LINEARIZER
DIGITALLY CONTROLLED DEVICE (SOLID STATE SWITCH, SYNTHESIZER, SUBSYSTEM)
VOLTAGE OR CURRENT CONTROLLED DEVICE
(ANALOG PIN ATTENUATOR, VARACTOR TUNED OSC )
ELECTROMAGNETICALLY CONTROLLED DEVICE (SOLENOID SWITCH, MOTOR DRIVEN DEVICE)

4. MONITOR
CONTROL

5. SPECIFICATIONS AND COMPONENT SIDE INTERFACES FOR MONITORS IN SELECT COMPONENTS
SYSTEM CONTROLLER
SYSTEM SIDE INTERFACE
SYSTEM SIDE INTERFACE
SYSTEM SIDE INTERFACE
THRESHOLD LIMITS,
TRUTH TABLE,
LOGIC LEVELS
TRANSFER FUNCTION,
ACCURACY,
ANALOG OR DIGITAL, FORMAT
TRUTH TABLE,
LOGIC LEVELS
DETECTORS,
WINDOW COMPARATORS, DECODERS
DETECTORS, SENSORS,
BUFFERS, LINEARIZERS, DACs
LOGIC BUFFERS,
DECODERS
DEVICES WITH
BUILT IN TEST
(MONITORING OF VOLTAGE, CURRENT,
OR RF LEVELS)
DEVICES WITH
QUANTITATIVE REPORTING (LEVELS, POSITION)
DEVICES WITH
DIGITAL OUTPUTS
(MECHANICAL SWITCHES, LOCK ALARMS)

6. PRESENT REQUIREMENTS FOR COMPONENT M&C INTERFACE
<< STANDARDIZED INTERFACE IS DESIRABLE >>

7. SPECIFIC SYSTEM REQUIREMENTS FROM SYSTEMS INTEGRATORS
PROS
CONS
DIFFERENTIAL
(LINE RECEIVERS)
BETTER NOISE IMMUNITY
MORE INTERFACE CONNECTIONS
SERIAL/PARALLEL
(SPI)
FEWER INTERFACE CONNECTIONS
POOR NOISE IMMUNITY, CRITICAL CLOCK LINE
OTHER THAN 5V TTL
(LVTTL, LVDS, I2C)
COMPATIBLE WITH SPECIFIC CONTROLLER
NON STANDARD
(USE 5V COMPATIBLE LOGIC)
IEEE-488
STANDARD FOR TEST EQUIPMENT
BULKY CABLE AND CONNECTOR, HARDWARE INTENSIVE
SERIAL INTERFACES
(USB, ETHERNET,
RS-232, -422, -485)
STANDARD,
BI-DIRECTIONAL, LARGE CAPACITY
(NEXT SLIDE)

8. STANDARD SERIAL INTERFACES
TYPE
PROS
CONS
USB
LIMITED +5V POWER THROUGH CONNECTOR
LARGE HARDWARE AND SOFTWARE OVERHEAD,
LIMITED LENGTH RUNS,
SINGLE DEVICE PER PORT
ETHERNET
POSSIBLE POWER OVER ETHERNET
CONSUMER CONNECTOR,
RS-232
2-WIRE CONNECTION,
ADAPTERS AVAILABLE
SINGLE DEVICE PER PORT,
VARIOUS PROTOCOLS
RS-422
4-WIRE CONNECTION,
MULTI-DROP CAPABILITY, ADAPTERS AVAILABLE
DEDICATED RECEIVER PER DEVICE,
RS-485

9. ASYNCHRONOUS SERIAL COMMUNICATIONS WITH RS-485 BUS
**********
BASED ON A STANDARD WITH A LONG SUCCESS RECORD
SUPPORTED WITH INEXPENSIVE PARTS AND ADAPTERS
CONNECTS UP TO 30 DEVICES ON ONE WIRE PAIR
REQUIRES MINIMAL HARDWARE TO IMPLEMENT
PROVIDES BI-DIRECTIONAL DATA TRANSFER
SUPPORTS CABLE RUNS UP TO 1200 METERS
EXHIBITS EXCELLENT NOISE IMMUNITY
NEEDS A STANDARD PROTOCOL

10. SERIAL PROTOCOLS TYPE PROS CONS CAN BUS
ADOPTED AND WIDELY USED IN THE AUTOMOTIVE INDUSTRY
SPECIALIZED APPLICATION
MODBUS
WIDELY USED IN INDUSTRIAL CONTROLS
MANY VERSIONS,
POOR COMPATIBILITY FROM VENDOR TO VENDOR
SA-BUS
LONG TIME STANDARD FOR SATCOM SYSTEMS
HIGH DEVELOPMENT AND SUPPORT COST
WMABUS
CONTROLLED STANDARD ADAPTED FROM THE SA-BUS PROTOCOL, NO DEVELOPMENT OR SUPPORT COSTS FOR COMPONENT OEMs, COMPATIBLE MODULES FOR A VARIETY OF APPLICATIONS, FULL SYSTEM SUPPORT

11. RS-485 SYSTEM WITH MONITOR AND CONTROL INTERFACE DISTINCTIONS
SYSTEM CONTROLLER
UART WITH RS-485 TRANCEIVER
UTILIZING A STANDARD INTERFACE SPECIFCATION
WMABUS MODULE INTERFACE
WMABUS MODULE INTERFACE
WMABUS MODULE INTERFACE
INDIVIDUAL
COMPONENT
INDIVIDUAL
COMPONENT
INDIVIDUAL
COMPONENT

12. MODULES FOR SYSTEM-READY COMPONENTS
> FULL SYSTEM CONTROL FROM ONE SERIAL PORT
>STANDARD ADAPTERS FOR USB AND ETHERNET
>TEST SOFTWARE SUPPLIED WITH PRODUCTS
>CONTROL UP TO 26 DEVICES WITH ONE WIRE PAIR
>NO DEVELOPMENT COST FOR COMPONENT OEM
WMA-046 SP4T SWITCH DRIVER W/ CONNECTOR
>SUPPORT TO OEM AND TO SYSTEM INTEGRATOR
WMA-039
17 I/O LINES W/ ADC'S
SOLDER IN
WMA-137
17 I/O LINES W/ ADC'S HEADERS
WMA-038
13 I/O LINES
CONNECTOR
WMA-047 SPDT SWITCH DRIVER W/ CONNECTOR
WMA-158 MOTOR DRIVER W/ LINEARIZER