This document describes the differences between Fixture Module compatibility with Cassini 16, Large/Small Cassini and RI7100A. It is particularly useful for looking up how to replace the functionality of a fixture module with limited availability or when upgrading to Cassini 16. For Cassini 16, some Fixture Module functionality has been replaced by functionality provided by a TIM. Compared with Fixture Modules, TIMs provide increased performance and, unlike a fixture module, one instrument can be used between multiple Fixtures. This document is updated as needed, subject to change without notice.
Current available RIKs: http://roos.com/FixtureModules
There are now 3 generations of Fixture Carrier and Module: RIFL, Active and Passive. The Carrier PCB is installed in the Fixture and connects the Modules to the Cassini EPC through RIFL. RILF Fixture Modules require a RIFL carrier are controlled directly by the RIFL bus and function as any other Instrument in a testplan and must be configured in the Fixture Def with the Device Connection Editor, no manual coding required and resources operate at full RIFL speed. Active Fixture Modules require an Active carrier and appear as instruments in the testplan, but can only operate as fast as the RIFL to C-bit conversion built into the carrier board (about 10x slower than RIFL) and may require 5v control logic not available on RIFL carriers. Active Fixture Modules that are also compatible with RIFL 3.3v control are listed as "Active/RIFL" below. Passive Fixture Modules must be manually controlled in the testplan with C-bits and can be used on any type of carrier. Fixture Modules listed as "N/A" are completely passive and do not require power or control to operate and can be mounted anywhere within the Fixture.
C-Bits are supplied directly from the Testhead ONLY when a RIFL or Active Carrier is not present. When RIFL/Active carriers are connected, the C-Bits are provided by the carrier directly and must be physically connected.
The carrier is dependant on the Infrastructure (Cassini 16 vs Large/Small Cassini vs RI7100A) and the version of the Sides and Top Plate. New designs should use the Pod Carrier (RIK0303A) while RIFL Carriers will be available for pre-existing designs.
Fixture Carrier Support by System Model:
Cassini 16 - Pod Carrier (RIK0303A), RIFL Carrier, RIK0200A 13 Module for Matrix Top Plate (RIK0163), or RIK0157A+RIK0236A 1x5 Carriers for custom top plates/soft dock
RI7100A - Passive & Active Carriers (limited availability): 12RF RIK0014B, RIK0084A 20RF, or RIK0160A LG/SM Cassini Only (not Cassini 16)
RI8556A/RI8557A Small/Large Cassini (RI7100C) - Active Carrier (limited availability), RIK0160A
NOTE: Active carriers and their modules are "limited availability" and should not be considered in new designs, use of Cassini 16 and RIFL carriers is strongly recommended.
Carrier Support by Interface Types:
Pod - Pod Carrier (RIK0303A) is fast as RIFL, but requires "pod" boards that can hold up to two Fixture Modules or may be it's own PCB.
RIFL - RIK0200A Cassini 16, RIK0175A 1x5 (RIK0236A Expansion 1x5), 3.3v on control lines vs 5v (so not compatible with some "Active" Modules.
Active - RI7100A 12RF RIK0014B, RIK0084A RI7100A 20RF, RIK0160A LG/SM Cassini Only (not Cassini 16)
Passive - Not Available (see RIFL), powered by module slot, "manual" control with c-bits
N/A - attach with double sided tape, "manual" control with c-bits
Any - Module can function in both Active or Passive (with c-bits) modes, RIFL carrier uses passive (c-bit) control
NOTE: RIFL is only supported on Cassini 16, LG/SM Cassini only supports Active
Fixture Modules:
 Link | RIK | Description | Replaced By | Limited Availability | Recommended | Instrument/Module | Carrier Type | New Dependancies - Functions - Reason |
 | RIK0006A | Switch 2.5 GHz Dual SPDT (2 ea) | RIK0220A | x | | | n/a | |
| RIK0006B | 2.5 GHz RF Switch Modules Dual SPDT (2 ea) | RIK0220A | x | | | n/a | |
| RIK0015A | Differential I/O Module Kit (1 Module) | RIK0087A | x | | | Passive | |
| RIK0017A | High Speed Serial Digital Module Kit (1 Module) | RI8535B (RIK0127A) | x | | I | Active | Cassini 16 - Use RI8535B FSPU Digital TIM instead with RIK0146A Digital Block |
| RIK0026B | 6 GHz RF Switch Modules Dual SPDT (2 ea) | RIK0220A | x | | | Active | |
| RIK0039A | High Voltage Buffer Module (1 Module) | RI8589 | x | | | Any | Use RI8589 FET Pulser TIM |
| RIK0049A | Delay Line Discriminator Module | RI8575 | x | | | Active | Use RI8575 Phase Noise Measure TIM |
| RIK0053A | Fixture Cbits Controller (2 Modules) | RIK0053B | x | | | Active | Use revB, includes 1 module per kit |
| RIK0053B | Fixture Cbits Controller (1 Modules) | Current | | x | M | Any | |
| RIK0054B | Divider 3 GHz/ SPDT Switch (1 Module) | Current | | x | M | Any | |
| RIK0055A | SPDT High Pass Filter (1 Module) | RIK0220A | | | | Active | (may work on RIFL) |
| RIK0056B | Switch 6 GHz Dual SP4T (1 Module) | RIK0218A | x | | | Active | |
| RIK0058A | Switch 6 GHz Dual SPDT (2 Modules) | RIK0220A (RIK0058B) | x | | | Active | Use revB, includes 1 module per kit; Cassini 16 - use RIK0220A |
| RIK0058B | Switch 6 GHz Dual SPDT (1 Module) | RIK0220A | | | | Active/RIFL | |
| RIK0059A | 2.5 GHz Fixture Step Attenuator / LNA | RIK0254A | x | | | Active | Replaced with 20 GHz Attenuator (requires controller board and RIFL) |
| RIK0077A | High BW Diff. I/O Buffer Module | RIK0087A | x | | | Active | |
| RIK0077B | Dual Fixture Diff Amp, HS, w/o Comm Mode Cont. | RIK0087A | x | | | Active | |
| RIK0087A | Advanced High BW Diff. I/O Buffer Module | | | | I | Active/RIFL | Includes common mode adjustable, FixtureDiffAmp1 instrument |
| RIK0088A | Fixture MUX, 1x32, 2x16 (1 Module) | | | | | Active/RIFL | |
| RIK0089A | 1x8 Terminated Switch Module (1 Module) | Not Replaced | x | | | Active | |
| RIK0092A | Fixture Step Attenuator, 0-36db, 4 Step | | | | | Active/RIFL | |
| RIK0095A | AC Switch Matrix 8x24 | RIK0095B | x | | | Active | |
| RIK0095B | AC Switch Matrix 8x24 | | | | | Active/RIFL | |
| RIK0105A | High Pass Filter (1 Module) | | x | | | Active | |
| RIK0127A | High Speed Digital Scan Module Kit | RI8535B TIM | | | | Active | Cassini 16 - Use RI8535B FSPU Digital TIM instead with RIK0146A Digital Block Use RIK0148A for DIB launch |
| RIK0132A | Coax Driver Buffer Module | Current | | x | | Passive | |
| RIK0147A | Digital Pogo DUT Interface Fixture Module 40 pins | RI8535B TIM | | | | Active, RIFL | Cassini 16 - Use RI8535B FSPU Digital TIM instead with RIK0146A Digital Block Use RIK0148A for DIB launch |
| RIK0203A | Dual SP4T RF Switch DC - 20GHz (Single Module) | RIK0203B | x | | | Active | |
| RIK0203B | Dual SP4T RF Switch DC - 20GHz (Single Module) | Current | | x | M | RIFL | |
| RIK0218A | 6 GHz High TOIP SP4T Dual Switch (1 Module) | Current | | x | M | RIFL | |
| RIK0219A | VCC Noise Filter | Current | | x | | RIFL | |
| RIK0220A | Dual SPDT High TOIP 6GHz Switch (1 Module) | Current | | x | - | RIFL | |
| RIK0250A | Hi IP3 SP4T Pin Switch, Absorptive (1 Module) | Current | | x | - | RIFL | RIK0255A and RIK0251A or RIK0252A needed for control and mounting |
| RIK0253A | Hi IP3 SP4T Pin Switch, Reflective (1 Module) | Current | | x | - | RIFL | RIK0255A and RIK0251A or RIK0252A needed for control and mounting |
| RIK0254A | Attenuator, Fixture 20 GHz 31dB in 1dB steps | Current | | x | - | RIFL | RIK0255A and RIK0251A or RIK0252A needed for control and mounting |
| RIK0255A | Driver, Fixture 20 GHz Switch/Atten | Current | | x | M | RIFL | Required for controlling RIK0250, RIK253A, RIK0254A switch and/or atten modules |
| RIK0290B | C-Bits Fixture Pod | Current | | x | - | Pod | |
| RIK0291A | RF Relay Driver Fixture Pod | Current | | x | I | Pod | |
| RIK0294A | Mux + Buffer Fixture Pod | Current | | x | I | Pod | |
| RIK0295A | Dual Module Fixture Pod | Current | | x | - | Pod | |