National Instruments PXIe-5423, Calibration Procedure

Page: 4 / 20

Table 1. PXIe-5423 Test Equipment (Continued)
Equipment Recommended
Model
Where Used Minimum Requirements
Power sensor Rohde & Schwarz
(R&S) NRP-Z91 Verifications:
•
Passband flatness
accuracy
Adjustments:
•
Passband flatness
Range: -30 dBm to 23 dBm
Frequency range: 50 kHz to
100 MHz
Absolute Power Accuracy:
<0.048 dB for <100 MHz
Relative Power Accuracy:
<0.022 dB for <100 MHz
VSWR: <1.11
SMA (m)-to-N
(f) adapter — Verifications:
•
Passband flatness
accuracy
Adjustments:
•
Passband flatness
Frequency range: DC to
100 MHz
Impedance: 50 Ω
Test Conditions
The following setup and environmental conditions are required to ensure the PXIe-5423 meets
published specifications:
•
The PXIe-5423 is warmed up for 15 minutes at ambient temperature. Warm up begins
after the chassis is powered and the PXIe-5423 is recognized by the host and configured
using NI-FGEN.
• All test instruments are warmed up for at least the period of time stated in the
documentation for each instrument and self-calibration is performed. The warm-up time
ensures that the test instruments are at a stable operating temperature.
• Keep cabling as short as possible. Long cables act as antennas, picking up extra noise that
can affect measurements.
• Verify that all connections to the PXIe-5423, including front panel connections and
screws, are secure.
• Use 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 ± 3 °C.
• Keep relative humidity between 10% and 90%, noncondensing.
4 | ni.com | PXIe-5423 Calibration Procedure