II. Model Interpretation

PXI: Compliant with the PXI industrial bus standard, 3U structure, occupying 2 slots, compatible with PXI and PXIe chassis.

5661: The serial number of the NI RF vector signal analyzer series, representing a 2.7GHz bandwidth model composed of a 5600 downconverter + 5142 digitizer, as an upgraded version of 5660.

Part Number: 778285-01 (32MB memory), 778285-02 (64MB memory).

III. Technical Specifications

Typical values under 25℃ environment, 50Ω load, preheating for 20 minutes

1 Frequency and Time Base

Operating frequency range: 9kHz to 2.7GHz

Real-time analysis bandwidth: 20MHz

Time base: 10MHz constant temperature crystal oscillator OCXO

Frequency stability: ±20ppb

Frequency accuracy: ±50ppb

Phase noise: At 1GHz carrier and 10kHz frequency offset, ≤ -129dBc/Hz at 10kHz

2 Input Power and Dynamic Range

Maximum input power: +30dBm

Input attenuation: 0 to 50dB, 10dB step NI

Spurious Free Dynamic Range: >80dB

Display Average Noise Level DANL: -165dBm/Hz

Input impedance: 50Ω

3 Digitization and Storage

Digitizer: PXI-5142, 14 bits

Sampling rate: 100MS/s

On-board memory: 32MB/64MB selectable

Digital Downconversion DDC: Supports 20MHz bandwidth IQ acquisition

4 Physical and Environmental

Specification: 3U, 2 slot

Power consumption: Approximately 28W

Operating temperature: 0℃ to 55℃

Heat dissipation: Forced air cooling of the chassis

IV. Interface and Communication Configuration

Front panel interface

PXI-5600 downconverter

RF IN: SMA female connector, 50Ω, RF signal input

10MHz OUT: SMA, output reference clock to 5142

POWER/STATUS: Power and lock-in status indicator lights

PXI-5142 digitizer

REF CLK IN: SMA, connect 10MHz reference clock

PFI: Programmable function interface, used for triggering and synchronization

Bus and Software

Bus: Standard PXI bus, including 32-bit PCI, trigger bus, 10MHz reference bus

Driver: NI-RFSA, supports LabVIEW, TestStand, Python, C#

Supporting software: Spectrum measurement toolkit, modulation analysis toolkit, supports frequency domain, IQ domain, demodulation measurement

V. Core Functions

1 Broadband signal analysis, covering the mainstream RF frequency band from 9kHz to 2.7GHz, 20MHz real-time bandwidth suitable for 2G/3G/4G, Bluetooth, Wi-Fi, etc. wireless signal acquisition.

2 High stability OCXO time base and low phase noise, ensuring frequency measurement accuracy and signal analysis reliability.

3 High-performance digitization and on-board DDC, 14-bit 100MS/s sampling, accurately capture IQ data, supporting complex modulation signal demodulation analysis.

4 Large dynamic range and high sensitivity, DANL as low as - 165dBm/Hz, capable of simultaneously measuring weak signals and strong signals.

4 Modular design, can be combined with PXI-5650 series signal generator to build a complete RF receive and transmit test system.

5 Flexible triggering and synchronization, supports frequency selectable burst triggering, suitable for communication and signal intelligent applications.

VI. Application Scenarios 1 Wireless communication testing, including 2G/3G/4G, Bluetooth, Wi-Fi, RFID devices' spectrum, modulation accuracy, adjacent channel power, and transmitter spurious emissions testing.

2 RF component testing, including gain, loss, linearity, harmonic and spurious emissions testing for amplifiers, filters, mixers, and RF switches.

3 Radar and electronic equipment testing, including mid-low frequency radar signal acquisition, RF environment simulation, and receiver sensitivity and anti-interference testing.

4 Aerospace and defense, including calibration of military RF equipment, RF link simulation, and RF sensor signal analysis.

5 Automotive electronics testing, including functionality and anti-interference testing of RF modules such as vehicle remote key, tire pressure monitoring, and vehicle Bluetooth.

VII. Installation and Maintenance Instructions

Installation and Power On

Power on after disassembly, with 5600 and 5142 fixed in adjacent slots, and the chassis reliably grounded for anti-static protection.

Preheat for 20 minutes, perform NI MAX self-check, confirm normal module operation and clock locking.

Keep the chassis ventilation duct unobstructed during operation, with the environmental temperature ≤ 55℃. Do not block the cooling fan.

Wiring and Operation

Connect RF IN with a 50Ω SMA cable, tighten the interface to reduce reflection loss, and avoid long-term input of overvoltage signals.

The 10MHz OUT of 5600 connects to REF CLK IN of 5142 to ensure module synchronization.

When synchronizing multiple devices, connect to an external 10MHz reference clock and enable the synchronization function.

Daily Maintenance and Calibration

Professional traceability calibration annually, use built-in self-calibration to correct temperature drift.

Regularly clean dust from SMA interfaces, keep them dry, and install dust caps when not in use.

Storage environment without condensation, humidity 10% to 90%, away from strong electromagnetic interference and vibration sources.

Do not power on while plugging or unplugging cables, avoid shock and vibration, and do not operate for long periods at excessive temperature.