PXI-6683H Specifications
- Updated2023-03-22
- 7 minute(s) read
PXI-6683H Specifications
These specifications apply to the PXI-6683 Series the PXI-6683H unless otherwise noted.
Definitions
Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.
Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.
- Typical specifications describe the performance met by a majority of models.
- Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.
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
PFI<0..2>
Output Characteristics
Frequency range | DC to 50 MHz | ||||||
Output impedance | 50 Ω, nominal | ||||||
Output coupling | DC | ||||||
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Absolute maximum applied voltage[3] | 0 to 4.4 V | ||||||
Output-to-output skew, asynchronous PXI_Star to PFI routes[4] | <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, tco | 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
[5]
Frequency range | DC to 50 MHz | ||||||||||
Input impedance | 1kΩ, nominal | ||||||||||
Input coupling | DC | ||||||||||
Nominal voltage level | 0 to +3.3 V, +5V tolerant | ||||||||||
Absolute maximum input voltage[6] | -0.5 V to +6.0 V | ||||||||||
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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 |
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[8] | <5 ns, typical | ||||
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Timestamping and Time-Synchronized Clock Generation
Time-synchronized clock period and duty cycle resolution | 10 ns |
Minimum pulse width for timestamping | 22 ns |
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% |
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 | ||||||||
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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 | ||||||||
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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 |
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.) |
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 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.
4 Applies to asynchronous routes from a single PXI_Star input to multiple PFI outputs.
5 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.
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 The PXI-6683H does not have star trigger lines
8 Measured at the PXI-6683 Series backplane connector.
9 Compensating for quantization error
10 All SV at -130 dBm
11 24 hours static
12 All SV at -130 dBm
13 The PXI-6683H does not have a CLKIN connector.