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Table 1. Access LED Color Indications

Color

Status

 

 

Off

Module is not yet functional.

Green

Driver has initialized the module.

Amber

Module is being accessed. The Access LED flashes amber for 50 ms when the
module is accessed.

Blinking Red Module has detected an over-temperature condition.

Solid Red

A hardware error has been detected.

Caution

 

If the Access LED is observed to be blinking red, the module has detected

an over-temperature condition. Continued use of the PXIe-6674T in this condition is
not recommended as product reliability has been compromised. Since several
common problems can cause an over-temperature condition, please investigate the
following:

Check that all chassis covers, filler panels, and/or slot blockers are installed.

Make sure that the chassis fan speed is set to the highest setting.

If applicable, check that the chassis fan air intake is not blocked and that the fan
filters are clean.

Make sure that the ambient temperature around the chassis isn't above the rated
temperature specifications. If so, move the chassis to a cooler ambient
temperature location.

Caution

 

If the Access LED is observed to be solid red, a hardware failure has been

detected that may impact the performance of the PXIe-6674T. Contact National
Instruments for support.

Active LED

The active LED indicates an error or phase-locked loop (PLL) activity. You can change the
Active LED to amber, unless an error overrides the selection. Refer to 

Figure 3.

 on page 9 for

the location of the active LED.

Tip

 

Changing the Active LED color to amber is helpful when you want to identify

devices in a multichassis situation or when you want an indication that your
application has reached a predetermined section of the code.

Table 2.

 on page 11 summarizes what the Active LED colors represent.

10

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PXIe-6674T User Manual

Summary of Contents for PXIe-6674T

Page 1: ...as follows Measurement hardware documentation This documentation contains detailed information about the measurement hardware that plugs into or is connected to the computer Use this documentation fo...

Page 2: ...ompliance Information 36 WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS 36 Introduction The PXIe 6674T timing and synchronization module enables you to share clocks and triggers between module...

Page 3: ...CVI is a complete ANSI C ADE that features an interactive video interface code generation tools and the LabWindows CVI Data Acquisition and Easy I O libraries Safety Information The following section...

Page 4: ...y occur in electrical distribution systems The following is a description of measurement categories Measurement Category I is for measurements performed on circuits not directly connected to the elect...

Page 5: ...ng software packages and documentation LabVIEW LabWindows CVI Microsoft Visual C MSVC PXI EMC filler panels National Instruments part number 778700 01 PXI Express chassis PXI Express embedded controll...

Page 6: ...fully insert the module into the chassis 6 Screw the front panel of the device to the front panel mounting rail of the chassis 7 If adjacent slots are not populated use EMC filler panels to cover the...

Page 7: ...erview This chapter presents an overview of the hardware functions of the PXIe 6674T Refer to Figure 2 on page 8 for a functional overview of the PXIe 6674T hardware PXIe 6674T User Manual National In...

Page 8: ...ng PXI Express PXIe_CLK100 PXIe_DSTARA 0 16 OCXO CLK10 CLK100 PXIe_DSTARC 0 16 PXIe_DSTARB 0 16 PFI 0 Threshold DAC PFI 0 Driver Comparator Driver Comparator PFI 1 Threshold DAC LVDS Driver Receiver P...

Page 9: ...PFI 4 LVDS 2 CLK OUT CLK IN 1 Access LED 2 Active LED 3 CLKOUT Connector 4 PFI 0 5 Connectors 5 CLKIN Connector Access LED The Access LED indicates the communication status of the PXIe 6674T Refer to...

Page 10: ...ting If applicable check that the chassis fan air intake is not blocked and that the fan filters are clean Make sure that the ambient temperature around the chassis isn t above the rated temperature s...

Page 11: ...able Function Interface which can be individually configured for either single ended operation or LVDS operation In LVDS mode the connectors are paired and can be programmatically set as either inputs...

Page 12: ...OCXO is an extremely stable and accurate frequency source CLKIN In from front panel CLKIN is the signal connected to the SMA input connector of the same name CLKIN can be routed directly to PXI_CLK10_...

Page 13: ...signals to and from these lines Note PXI_TRIG 0 5 are also known as RTSI 0 5 in some hardware devices and APIs However PXI_TRIG 6 7 are not identical to RTSI 6 7 PXI_STAR 0 16 In Out to from chassis T...

Page 14: ...in advanced clock generation circuitry for generating clock signals from below 1 Hz to 1 GHz with very fine frequency resolution The clock generation circuitry is based on a direct digital synthesis D...

Page 15: ...re has the advantage the PXI_CLK10 and PXIe_CLK100 are always sourced from the same reference oscillator and therefore it is impossible to lose PXI_CLK10 or PXIe_CLK100 by disconnecting the reference...

Page 16: ...by using the CLKIN SMA on the front panel CLKIN is an AC coupled 50 terminated input to the PXIe 6674T In order to increase the amplitude of signals the CLKIN receiver can use the CLKIN circuitry fea...

Page 17: ...al signal paths to connect the system timing slot to each PXI Express peripheral slot up to 17 peripheral slots These signals are PXIe_DSTARA PXIe_DSTARB and PXIe_DSTARC PXIe_DSTARA PXIe_DSTARA is use...

Page 18: ...ork divides the 17 PXIe_DSTARA lines into four banks as shown in Table 5 on page 18 Table 5 PXIe_DSTARA Divisions Bank 0 Bank 1 Bank 2 Bank 3 PXIe_DSTARA 0 3 PXIe_DSTARA 4 7 PXIe_DSTARA 8 11 PXIe_DSTA...

Page 19: ...FIs When enabled for LVDS operation the PFI_LVDS pair can be configured as either an input or an output PFI_LVDS lines can not be used as an input and output at the same time Because of the increased...

Page 20: ...into a 50 load and is also AC coupled The sources available to be routed to CLKOUT differ depending on whether the low speed or high speed driver is used The sources available to the low speed driver...

Page 21: ...tware Trigger are routed to SOURCE of each Selection Circuitry block SYNCHRONIZATION CLOCKS for PXI_STAR 0 16 PXI_TRIG 0 7 and PXIe DSTARB 0 16 Selection Circuitry Selection Circuitry Selection Circui...

Page 22: ...outing operations must also define a third signal known as the synchronization clock Refer to the Choosing the Type of Routing section for more information on synchronous versus asynchronous routing F...

Page 23: ...PFI inputs are programmable The input signal is generated by comparing the input voltage on the PFI connectors to the voltage output of software programmable DACs The thresholds for the PFI lines are...

Page 24: ...vided by the second frequency divider 2m up to 512 Refer to Choosing the Type of Routing section for more information on the sychronization clock Note The PFI synchronization clock is the same for all...

Page 25: ...Triggers The PXI triggers go to all the slots in the chassis All modules receive the same PXI triggers so PXI trigger 0 is the same for the system timing slot as it is for Slot 3 and so on This featur...

Page 26: ...be matched to within 1 ns A typical upper limit for the skew in most NI PXI Express chassis is 500 ps The low skew of the PXI star trigger bus is useful for applications that require triggers to arriv...

Page 27: ...ady logic high or low Backplane synchronization clock Refer to the Using the PXI Triggers section for more information on the backplane synchronization clock Choosing the Type of Routing The PXIe 6674...

Page 28: ...chronous routing operation on the PXIe 6674T can be any of the following lines Any front panel PFI pin PFI 0 5 as single ended Any front panel PFI pin as LVDS PFI_LVDS 0 2 Any PXI star trigger line PX...

Page 29: ...or example PXI_CLK10 all receiving devices can act on the trigger at the same time as shown in Figure 10 on page 29 Figure 10 Synchronous Routing to Multiple Destinations PXI_CLK10 Trigger Destination...

Page 30: ...le methods to ensure this requirement is met go to ni com info and enter the Info Code SyncTriggerRouting Possible sources for synchronous routing with the PXIe 6674T include the following sources Any...

Page 31: ...to an external reference clock the phase between the clocks can be adjusted The time between rising edges of PXI_CLK10 and the input clock is minimized using this constant Note The PXI_CLK10 phase is...

Page 32: ...f the receiver the device suffering interference Relocate the transmitter the device generating interference with respect to the receiver Plug the transmitter into a different outlet so that the trans...

Page 33: ...ace the product NI may use new or refurbished parts or products that are equivalent to new in performance and reliability and are at least functionally equivalent to the original part or product You m...

Page 34: ...d Party Legal Notices You can find end user license agreements EULAs and third party legal notices in the following locations Notices are located in the National Instruments _Legal Information and Nat...

Page 35: ...de dress Xilinx is the registered trademark of Xilinx Inc Taptite and Trilobular are registered trademarks of Research Engineering Manufacturing Inc FireWire is the registered trademark of Apple Inc L...

Page 36: ...D TO DEATH PERSONAL INJURY SEVERE PROPERTY DAMAGE OR ENVIRONMENTAL HARM COLLECTIVELY HIGH RISK USES FURTHER PRUDENT STEPS MUST BE TAKEN TO PROTECT AGAINST FAILURES INCLUDING PROVIDING BACK UP AND SHUT...

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