Calibrate the PXIe-6614 using Calibration Executive.

Calibration Executive Procedure Features

Verify Only Verify & Adjust Manual Mode Optional Adjust

Approximate Test Time

Verify Only Verify & Adjust
3 minutes 9 minutes

Test Equipment

The following table lists the test equipment required to calibrate the PXIe-6614.

Table 81. Test equipment for calibrating the PXIe-6614
Instrument Recommended Model Requirements
10 MHz rubidium frequency standard clock or better* Symmetricom 8040C or Datum 8040 ±0.75 ppb† accuracy or better
Shielded 68-conductor cable Sh68-68-D1 Terminated with 68-pin female 0.050 series D-type connector
I/O connector block BNC-2121, SCB-68A, or any 68-pin breakout box —
BNC male-to-BNC male cable — 50 Ω
75 Ω BNC male to 50 Ω BNC female adapter — 50 to 75 Ω
Note
  • *Allow adequate time for the clock to warm up prior to calibration.
  • †1 ppb = 1/1000,000,000

Test Conditions

The following setup and environmental conditions are required to ensure the PXIe-6614 meets published specifications.
  • Keep connections to the device as short as possible. Long cables and wires act as antennas, picking up extra noise that can affect measurements.
  • Verify that all connections to the device, including front panel connections, are secure.
  • Use shielded coaxial cables or shielded copper wire for all cable connections to the device. Use twisted-pair wire to eliminate noise and thermal offsets.
  • Maintain an ambient temperature of 23 °C ± 5°C.
  • Keep relative humidity between 5% and 95%, non-condensing.
  • Allow a warm up time of at least two hours to ensure that the measurement circuitry is at a stable operating temperature.

Device Setup

  1. Power off the PXI Express chassis, and install the PXIe-6614 in an available slot.
  2. Power on the chassis and launch MAX.
  3. Configure the device identifier and select Self-Test to ensure that the device is working properly.
  4. Connect the PXIe-6614 to the I/O connect or block using the shielded 68-conductor cable.
  5. Connect the clock source to PFI 39 on the PXIe-6614.

Test Limit Equations

The following test limits are derived from the published specifications.

Table 82. PXIe-6614 Test Limit Equations
Equation Type Equation
Clock Accuracy Verification and Adjustment Frequency = 100 MHz

Temperature and 1-year drift = 75 ppb

Retrace error = 10 ppb

Calibration measurement accuracy = 4.25 ppb

As-found Limit = Frequency * (1 ± (Temperature and 1-year drift + Retrace error)) = 100 MHz * (1 ± (75 ppb + 10 ppb)) = ± 8.5 Hz

As-left Limit = Frequency * (1 ± Calibration measurement accuracy) = 100 MHz * (1 ± 4.25 ppb) = ± 0.425 Hz