DDR Memory FAQs
DDR Product Overview
DDR1 333 DIMM
DDR1 333 SODIMM
DDR1 400 DIMM
DDR1 Embedded
DDR2 667 DIMM
DDR2 667 SODIMM
DDR2 800 DIMM
DDR2 Embedded
DDR3 1067 DIMM

Q. Which DIMMs does the FS2334 DDR2 Analysis Probe support?

A.The FS2334 supports the PC6400 module, a 240-pin, 400 MHz clock (800 MT/s data rate), 64-bit, Unbuffered Synchronous Double Date Rate (DDR) DRAM Dual In-Line Memory Module (DDR SDRAM DIMM). It also supports slower versions that use a 333 MHz (667 MT/s data rate) or a 200 MHz clock (400 MT/s data rate) DDR SDRAM DIMM. Registered and non-registered DIMM's are supported.

Q. Why does the FS2334 require seven logic analyzer cards?

A. The FS2334 requires seven logic analyzer cards depending for protocol analysis or two logic analyzer cards for timing analysis. The FS2334 requires that the 16950A card be in 800 Mb/s mode, which allows only 2 pods per card for use. The first card is for ADDR/Cmd signals, cards 2-4 are for WRITE Data, and cards 5-7 are used for READ data. Since the 16900 and 16902 have six slots, this system requires two logic analysis frames. We recommend using 16900 operating system version 3.20 or higher with the FS2334. You may also use the 16753-756 cards. All seven must be the same model number.

Q. Can I use the 16760 card?

A.Yes. In the 800 Mt/s mode, the 16760 has only one pod available. This means that you will need 15 cards and three of the 16900 or 16902 logic analysis systems for this system.

Q. Can you guarantee the FS2334 will operate correctly in my system?

A.Another good question. Electrically, the DDR2 bus is extended approximately 1.0 inch in etch length in the design of the FS2334. Depending on the design of the system being tested, users may experience difficulties with this extension of the DDR2 bus. The passive logic analyzer termination presents a single electrical load on the DDR bus via low capacitance, high impedance terminators, and also provides a matched impedance to the logic analyzer. The analysis probe includes seven cables that connect to the logic analyzer modules. Factors beyond the control of FuturePlus Systems that can have a significant effect on the performance of the whole DDR2 system include the type of memory controller, the target layout, the type of DIMM used, which DIMM socket is being probed, and which logic analyzer cards are being used. So, we cannot guarantee your success. We have made every effort to give you a product that has every chance of succeeding.

Q. Can the FS2334 perform Eye Scan measurements?

A. Yes. The FS2334 can do Eye Scan for Command activity clocked by CK0, Chip Select qualification may be required. If the target can generate just Read or Write activity, then a data strobe signal (DQS2, DQS7, or DQS17) can be used to clock Eye Scan for the data signals.

Q. Does the FS2334 DDR Protocol Decoder display ECC?

A. The ECC bits are available on Header 14. However, viewing them may require an additional logic analysis module and modification of existing configuration files.

Q.What are RDIMM's and UDIMM's?

A. UDIMM is an unregistered DIMM and RDIMM is a Registered DIMM.  With registered DIMM's the Address/Command information go through buffers.  Registered DIMM's are usually used in servers; this allows the user to put more DIMMs on a motherboard than unregistered DIMMs, because the Address/command info go through buffers.  The buffers add a delay of 1 clock cycle between when the command is issued to when the data is valid for a read or write.  This delay can be compensated through the preferences.  The FS2334 supports both UDIMM's and RDIMM's

Q. What software is included with the FS2334 DDR2 Analysis Probe?

A. Files are included that automatically set up the Agilent logic analyzer for state or timing analysis mode and label all the signal names. Another file contains the protocol decoder, which translates the data into memory protocol during state analysis. The DDR Protocol Checker and Performance Analysis software helps you verify correct bus performance and measure your bus performance.

Q. Does the FS2334 include the Transaction Viewer software?

A. No. The FS2334 requires two 16900 or 16902 frames. The Transaction Viewer software has only been designed for one frame at this time.

Q. Does your probe get its power from my system?

A. No. The FS2334 is provided with its own external power supply.

Q. How do I find out what are the latest versions of Agilent logic analyzer operating software?

A. Contact your nearest Agilent Call Center.

Q. How do I know which Agilent logic analyzer is best for my needs?

A. Click here.

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