PXI-6683 Specifications

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Last Modified: March 13, 2017

These specifications apply to the PXI-6683 the PXI-6683H unless otherwise noted.

Definitions

Warranted specifications describe the warranted performance of a calibrated model under the stated operating conditions.

Characteristics describe values that are relevant to the use of the model under the stated operating conditions but are not covered by the product warranty.

Typical specifications describe product performance met by a majority of the models.
Nominal specifications describe additional information about the product performance that may be useful.

Specifications are Characteristics unless otherwise noted.

PXI-6683 Specification Conditions

Specifications are valid for the range 0 °C to 55 °C unless otherwise noted.

CLKOUT Characteristics

Output frequency^[1]	10 MHz
Duty cycle distortion^[2]	<1%, typical
Output impedance	50 Ω, nominal
Output coupling	AC
PXI_CLK10 to CLKOUT delay	8 ns, typical

Load	Square Wave
Open Load	5 V_p-p, typical
50 Ω Load	2.5 V_p-p, typical

Square wave rise/fall time (10 to 90%)

<1 ns, typical

CLKIN Characteristics (PXI-6683 Only)

CLKIN input frequency^[3]	10 MHz ±100 ppm, sine or square wave
Input impedance	50 Ω, nominal
Voltage range	400 mV_p-p to 5 V_p-p
Absolute maximum input voltage^[4]	6 V_p-p
CLKIN to PXI_CLK10_IN delay	11 ns, typical
Jitter added to CLKIN	1.3 ps_rms, 10 Hz to 100 kHz, typical
Duty cycle distortion of CLKIN to PXI_CLK10_IN	<1%, typical
Required input duty cycle^[5]	45 to 55%

PFI<0..2>

Output Characteristics

Frequency range

DC to 50 MHz

Output impedance

50 Ω, nominal

Output coupling

Output voltage levels

Output high

1.2 V min, 1.6 V typical for 50 Ω load to ground

2.6 V min, 3.3 V typical for 1 MΩ load

Output low

0.1 V max, 0 V typical for 50 Ω load to ground

0.1 V max, 0V typical for 1 MΩ load

Absolute maximum applied voltage^[6]

0 to 4.4 V

Output-to-output skew, asynchronous PXI_Star to PFI routes^[7]

<400 ps, typical

Output-to-output skew, other asynchronous routes

<1.5 ns, typical

Output-to-output skew, synchronous routes

<2 ns, typical

Synchronized trigger clock to out time, t_co

10 ns, max (relative to CLKOUT when configured to route PXI_CLK10)

Output current

±48 mA, max

Square wave rise/fall time (10 to 90%) for 50 Ω load

<1 ns, typical

Input Characteristics

^[8]

Frequency range

DC to 50 MHz

Input impedance

1kΩ, nominal

Input coupling

Nominal voltage level

0 to +3.3 V, +5V tolerant

Absolute maximum input voltage^[9]

-0.5 V to +6.0 V

Input thresholds
Voltage threshold high	+2.3 V max
Voltage threshold low	+0.8 V min

Asynchronous delay, t_pd
PFI<0..2> to PXI_TRIG<0..7> output	17 to 20 ns, typical
PFI<0..2> to PXI_STAR<0..12> output^[10]	12 ns, typical
Synchronized trigger input setup time, t_setup	25 ns, max (relative to CLKOUT when configured to route PXI_CLK10)
Synchronized trigger input hold time, t_hold	0 ns (relative to CLKOUT when configured to route PXI_CLK10)

IRIG-B Input Characteristics (PFI0)

IRIG-B AM compatibility	IRIG-B 12X (200-04 standard)
Maximum Input voltage range	-5 V to +5 V
Decode Input voltage range	1.5 V to 10 V peak-peak mark (3:1 ration mark:space)
Input carrier frequency	1 kHz

Caution

Do not connect an IRIG-B AM signal to PFI 0 when the input is configured for digital operation, as this can result in damage of the digital input circuitry.

IRIG-B DC compatibility	IRIG-B 00X (200-04 standard)
Input characteristics for IRIG-B DC	same as PFI digital input characteristics listed above

The following assumptions are made regarding the received IRIG-B signal. All conditions must be met for the PXI-6683 Series to be able to synchronize accurately:

Seconds begin every minute at 0, increment to 59, and then roll over to 0.
Minutes begin every hour at 0, increment to 59, and then roll over to 0.
Hours begin every day at 0, increment to 23, and then roll over to 0.
Days begin every year at 1. Days increment to 365 in non-leap years, or to 366 in leap years, and then roll-over to 1. Leap years must be supported. Valid values for year are 01 to 99, inclusive. Years are assumed to be in the XXI Century. For instance, year 09 represents 2009. If the year is not supplied (sent as 00), the OS system time is read and the year is derived from it.

To achieve proper synchronization of the NI PXI-6683 Series ensure that the IRIG-B source used conforms to the requirements listed above. Note that most IRIG-B sources conform to these requirements.

PXI Trigger Characteristics

Output-to-output skew^[11]

<5 ns, typical

Asynchronous delay, t_pd
PXI_Trig<0..7> to PFI<0..2>	13 to 23 ns, typical

PXI_Star Trigger Characteristics (PXI-6683)

Output-to-output skew, PFI to PXI_Star Routes^[12]^[13]

<400 ps

Output-to-output skew, synchronous triggers

<2 ns, typical

Asynchronous delays, t_pt
PXI_Star <0..12> to PFI<0..2> output	8.5 ns, typical
PXI_STar<0..12> to PXI_Trig<0..7> output	10 to 18 ns, typical

TCXO Characteristics

Frequency	10 MHz
Initial accuracy	±1 ppm
Temperature stability (0 to 55 °C)	±1 ppm
Tuning range	±17.5 ppm minimum
Aging per year	±1 ppm
Duty cycle	45 to 55%

Timestamping and Time-Synchronized Clock Generation

Time-synchronized clock period and duty cycle resolution

10 ns

Note

Clock signals generated on PFI, PXI_Star (PXI-6683 only), or PXI Trigger lines must have a period and duty cycle that is a multiple of 10 ns.

Minimum pulse width for timestamping

22 ns

GPS Characteristics

DC voltage output for antenna

+5 V, ±5%

Maximum output current

60 mA

Minimum current for antenna presence detection

4.7 mA typical, 7.9 mA max

Input impedance

50 Ω, nominal

GPS receiver type

50 channels, GPS L1 frequency (1575.42 MHz), C/A Code

Recommended signal strength at SMB connector

-130 dBm

Maximum RF power at input

+3 dBm

Accuracy
PPS^[14]	15 ns
Position^[15]^[16]	2.5 m CEP, 3.5 m SEP
Velocity^[17]	0.1 m/s

Maximum horizontal velocity

310 m/s

Maximum vertical velocity

50 m/s

Physical

Chassis requirement

One 3U CompactPCI or PXI slot (PXI the system timing slot for full functionality)

Weight

186 g

Front panel connectors

Six SMB male, 50 Ω; one standard RJ-45 Ethernet connector

Front panel indicators

Two tricolor LEDs (green, red, and amber) for GPS and IEEE 1588 status, and two green/amber LEDs for Ethernet link status and speed

Recommended maximum cable lengths
PFI, DC to 1.5 MHz	200 m
CLKOUT to CLKIN^[18]	200 m
Ethernet CAT5	100 m

Power Requirements

Voltage (V)	Typical	Maximum
+3.3 V	740 mA	1.86 A
+5 V	335 mA	1.14 A
+12 V	54 mA	175 mA
-12 V	24 mA	35 mA

Synchronization Accuracy

Test^*	Synchronization Performance
GPS^†	±40 ns, <8 ns standard deviation
IEEE 1588 3 m Ethernet direct connection^‡	±25 ns, <4 ns standard deviation
IEEE 1588 through a 1588 switch^‡,**	±40 ns, <8 ns standard deviation
IEEE 1588 through a hub^‡,††	±60 ns, <12 ns standard deviation
IEEE 1588 through a switch^‡,‡‡	±25 µs, <150 ns standard deviation
IRIG-B DC	±55 ns, <13 ns standard deviation
IRIG-B AM matching^{***,†††}	±1.15 µs, <260 ns standard deviation
IRIG-B AM to source^†††	±5 µs, <500 ns standard deviation
PPS	±40 ns, <8 ns standard deviation

^*All synchronization performance figures are based on empirical results and represent typical behavior. All figures are obtained recording the offset between PPS signals generated by two PXI-6683 Series boards, inside a closed PXI chassis, configured to synchronize to the particular time reference, at ambient room temperature. Synchronization was performed for 15 minutes before PPS offset recording began. All test durations were at least 12 hours.

^†For the GPS test, two PXI-6683 Series boards were independently synchronizing to GPS and configured to generate a PPS. the specification above represents typical empirical results. Please note that GPS satellites are only guaranteed to be withing 100 ns of UTC. Therefore, the offset between any two devices synchronizing can be as high as 200 ns plus the offset of that device to GPS.

^‡Sync interval of 1 second was used for IEEE 1588 tests, and all Ethernet connections were 1 Gbps unless otherwise specified.

^**Hirschmann MAR1040 Gb 1588 switch used

^††Netgear DS104 Hub used with 100 Mbps links

^‡‡Airlink 101 Gigabit over copper switch used. For this test, a moderate amount of non-1588 Ethernet traffic was present on the switch.

^***IRIG-B AM matching specification was obtained by setting two PXI-6683 Series boards to synchronize independently to the same IRIG-B AM source and generate a PPS. the offset between their PPS signals was then measured over a 12 hour period.

^†††IRIG-B performance depends on IRIG-B source stability and quality.

Environmental

Operating Environment

Ambient temperature range	0 to 55 °C (tested in accordance with IEC-60068-2-1 and IEC-60068-2-2.)
Relative humidity range	10% to 90%, noncondensing (Tested in accordance with IEC-60068-2-56.)
Maximum altitude	2,000 m (at 25 °C ambient temperature)
Pollution Degree	2

Indoor use only.

Storage Environment

Ambient temperature range	-40 to 70 °C (Tested in accordance with IEC-60068-2-1 and IEC-60068-2-2.)
Relative humidity range	5% to 95% noncondensing (Tested in accordance with IEC-60068-2-56.)

Shock and Vibration

Operating Shock

30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC-60068-2-27. Meets MIL-PRF-28800F Class 2 limits.)

Random Vibration
Operating	5 to 500 Hz, 0.3 g_rms
Nonoperating	5 to 500 Hz, 2.4 g_rms (Tested in accordance with IEC-60068-2-64. Nonoperating test profile exceeds the requirements of MIL-PRF-28800F, Class 3.)

Safety

This product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use:

IEC 61010-1, EN 61010-1
UL 61010-1, CSA 61010-1

Note

For UL and other safety certifications, refer to the product label or the Online Product Certification section.

Electromagnetic Compatibility

This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement, control, and laboratory use:

EN 61326 (IEC 61326): Class A emissions; Basic immunity
EN 55011 (CISPR 11): Group 1, Class A emissions
AS/NZS CISPR 11: Group 1, Class A emissions
FCC 47 CFR Part 15B: Class A emissions
ICES-001: Class A emissions

Note

For the standards applied to assess the EMC of this product, refer to the Online Product Certification section.

Note

For EMC compliance, operate this device with shielded cabling.

CE Compliance

This product meets the essential requirements of applicable European Directives as follows:

2006/95/EC; Low-Voltage Directive (safety)
2004/108/EC; Electromagnetic Compatibility Directive (EMC)

Online Product Certification

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column.

Waste Electrical and Electronic Equipment (WEEE)

EU Customers

At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit ni.com/environment/weee.

电子信息产品污染控制管理办法（中国RoHS）

中国客户

National Instruments符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于National Instruments中国RoHS合规性信息，请登录 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)

¹ When configured to route the on-board oscillator (TCXO) or PXI_CLK10, otherwise CLKOUT will be disabled (default).
² When configured to route the on-board oscillator (TCXO) or PXI_CLK10, otherwise CLKOUT will be disabled (default).
³ This is a requirement of the PXI specification.
⁴ Stresses beyond those listed can cause permanent damage to the device. Exposure to absolute maximum rated conditions for extended periods of time can affect device reliability. Funtional operation of the device outside the conditions indicated in the operations parts of the specification is not implied.
⁵ This is a requirement of the PXI specification.
⁶ Stresses beyond those listed can cause permanent damage to the device. Exposure to absolute maximum rated conditions for extended periods of time can affect device reliability. Functional operation of the device outside the conditions indicated in the operational parts of the specifications is not implied.
⁷ Applies to asynchronous routes from a single PXI_Star input to multiple PFI outputs.
⁸ For PFI 0 these characteristics apply when the line is configured as a digital input. They do not apply when configured as an IRIG-B AM input.
⁹ Stresses beyond those listed can cause permanent damage to the device. Exposure to absolute maximum rated conditions for extended periods of time can affect device reliability. Functional operation of the device outside the conditions indicated in the operational parts of the specifications is not implied.
¹⁰ The PXI-6683H does not have star trigger lines
¹¹ Measured at the PXI-6683 Series backplane connector.
¹² Measured at the PXI-6683 Series backplane connector.
¹³ Applies to asynchronous routes from a single PFI input to multiple PXI_Star outputs.
¹⁴ Compensating for quantization error
¹⁵ All SV at -130 dBm
¹⁶ 24 hours static
¹⁷ All SV at -130 dBm
¹⁸ The PXI-6683H does not have a CLKIN connector.

Table Of Contents

Definitions

PXI-6683 Specification Conditions

CLKOUT Characteristics

CLKIN Characteristics (PXI-6683 Only)

PFI<0..2>

Output Characteristics

Input Characteristics

IRIG-B Input Characteristics (PFI0)

PXI Trigger Characteristics

PXI_Star Trigger Characteristics (PXI-6683)

TCXO Characteristics

Timestamping and Time-Synchronized Clock Generation

GPS Characteristics

Physical

Power Requirements

Synchronization Accuracy

Environmental

Operating Environment

Storage Environment

Shock and Vibration

Safety

Electromagnetic Compatibility

CE Compliance

Online Product Certification

Waste Electrical and Electronic Equipment (WEEE)

电子信息产品污染控制管理办法（中国RoHS）

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