II. Model Interpretation

PXI represents that the equipment follows the PXI industrial bus standard and adopts a 3U structure, occupying three adjacent slots, and is compatible with both PXI and PXIe chassis.

5670 belongs to the NI RF Vector Signal Generator series, representing a basic vector signal source with a working frequency upper limit of 2.7 GHz and a real-time bandwidth of 22 MHz.

The entire machine distinguishes different component numbers based on the onboard memory. The 8-Megabyte memory version is 778286-01, the 32-Megabyte memory version is 778286-02, and the 256-Megabyte memory version is 778286-03.

III. Technical Parameters

The following parameters are typical values after the equipment has preheated for 30 minutes under a 25-degree Celsius environment and a 50-ohm standard load.

1 Frequency and Timing Parameters

Frequency range: 250 kHz to 2.7 GHz

Real-time signal bandwidth: 22 MHz

Reference clock: 10 MHz constant temperature crystal oscillator

Frequency stability: ±20 ppb

Frequency accuracy: ±50 ppb

Phase noise: Less than -126 dB/Hz at 1 GHz carrier and 10 kHz frequency offset under the condition of 1 GHz carrier and 10 kHz frequency offset

2 Output Power and Signal Spurious

Output power range: -145 dBm to +13 dBm

Power resolution: 0.1 dB

Output attenuation steps: 0 to 90 dB, with a 10 dB step

Harmonic suppression: More than 60 dB carrier

Output impedance: 50 ohms

3 Sampling and Storage Parameters

Sampling bit number: 16 bits

Basic sampling rate: 100 M samples per second, equivalent to 400 M samples per second after quadrupling interpolation

Onboard memory: Optional 8 Megabytes, 32 Megabytes, 256 Megabytes

4 Modulation Types

Supports Amplitude Modulation, Frequency Modulation, Phase Modulation, Amplitude Shift Keying, Frequency Shift Keying, Phase Shift Keying, Minimum Frequency Shift Keying, Orthogonal Amplitude Modulation, and other mainstream modulation formats

5 Physical and Environmental Parameters

Equipment specification: 3U structure, occupying three chassis slots

Overall power consumption: Approximately 35 watts

Operating temperature range: 0 degrees Celsius to 55 degrees Celsius

Cooling method: Forced air cooling of the chassis

IV. Interface and Communication Configuration

Front panel interface

RF output interface: Uses SMA interface, standard impedance 50 ohms, used for outputting RF signals

External reference clock input interface: Uses SMA interface, connects to an 10 MHz external clock to achieve multi-device synchronization

Programmable function interface: Used for external triggering and signal synchronization

Status indicator lights: Display the power supply status of the equipment and the clock lock status

Bus and software configuration

The device backplane is equipped with a standard PXI bus, including a 32-bit PCI bus PXI trigger bus and a 10 MHz reference bus, enabling trigger linkage and clock sharing between devices.

The accompanying driver program is NI-RFSG, which can be used in development environments such as LabVIEW TestStand, Python, and C#.

A dedicated modulation tool software is provided, supporting custom waveform editing, signal generation, and parameter analysis.

V. Core Functions

1 Wideband RF signal output, covering 250 kHz to 2.7 GHz, with a 22 MHz bandwidth capable of meeting the simulation requirements of second-generation, third-generation, fourth-generation mobile communications, Bluetooth, wireless local area networks, etc.

2 Built-in high-stability constant temperature crystal oscillator with high frequency accuracy and low phase noise, ensuring the purity and measurement reliability of the output RF signal.

3 Adopting a 16-bit high-resolution sampling architecture, supporting a wide range of modulation methods and custom arbitrary waveform output, suitable for complex RF signal generation scenarios. 4. Wide power adjustment range with high power resolution, capable of simulating weak signals and conventional power signals, meeting the requirements for receiver sensitivity and anti-interference testing.

5. Standard modular design, compatible with PXI-5660 and PXI-5661 series RF analyzers, enabling the construction of an integrated RF transceiver testing system.

6. Supports multi-device synchronization operation, with multiple modules sharing a reference clock and trigger signal, ensuring consistent output phase.

Six. Application Scenarios

1. Wireless communication testing, used for the calibration of transmitters of 2G, 3G, 4G mobile communication devices, Bluetooth, wireless local area networks, and RFID devices, as well as receiver sensitivity and modulation accuracy testing.

2. RF component testing, completing the gain, loss, linearity, harmonic and spurious performance testing of RF amplifiers, filters, mixers, RF switches, etc.

3. Radar and electronic equipment testing, simulating medium and low-frequency radar signals and various RF environments, conducting equipment anti-interference performance testing.

4. Aerospace and defense field, used for military RF equipment calibration, RF link simulation, and RF sensor signal excitation.

5. Automotive electronics testing, conducting functional and anti-interference tests for automotive remote key, tire pressure monitoring module, and car Bluetooth, etc., which are automotive-grade RF products.

Seven. Installation and Maintenance Instructions

Installation and Power On

The equipment must be installed in a power-off state, fixed in the three adjacent slots of the chassis, and ensure reliable grounding of the chassis to prevent hardware damage from static electricity.

After installation, connect the power supply, allow the equipment to preheat for thirty minutes, and let the internal constant-temperature crystal oscillator enter a stable working state. Use the NI MAX software to complete the overall machine self-check to confirm no hardware faults and normal clock locking.

During operation, ensure that the air duct of the chassis is unobstructed, the working environment temperature does not exceed 55 degrees Celsius, and do not block the chassis cooling fan.

Cabling and Operation

The RF output port is connected using a 50-ohm standard SMA coaxial cable, tighten the interface to reduce signal reflection and transmission loss.

When working in synchronous mode with multiple devices, connect to an external reference clock of 10 MHz and enable the synchronization function.

Before downloading custom waveforms, confirm the onboard memory capacity of the device to avoid waveform truncation and signal distortion issues.

Daily Maintenance and Calibration

It is recommended to conduct professional traceability calibration once a year to compensate for parameter offsets caused by long-term use of the equipment. Daily use can utilize the built-in self-calibration function of the device to correct performance drift caused by temperature changes.

Regularly use drying tools to clean the dust on the SMA interface surface to keep the interface dry and clean. When the equipment is idle for a long time, install dust caps on all interfaces.

The equipment storage and usage environment should be free of condensation, with the humidity controlled between 10% and 90%. Keep away from strong electromagnetic interference equipment and vibration sources.

Do not plug or unplug signal cables while the equipment is powered on to avoid the equipment being impacted and subjected to severe vibrations. Do not operate the equipment for a long time in an environment exceeding the rated temperature.