II. Model Interpretation

PXI represents that the equipment follows the PXI industrial bus standard and adopts a 3U structure, occupying a single cabinet slot, and is compatible with both PXI and PXIe cabinets.

5652 belongs to the NI 5650 series RF signal generator. This series is a general-purpose RF analog signal source product line. The digital number distinguishes the frequency range. 5652 corresponds to the highest working frequency of 6.6GHz version from NI.

The standard complete component number is 779670-02.

III. Technical Parameters

All of these parameters are typical values under a 25℃ environment and a 50Ω standard load.

1. Frequency Parameters

Operating frequency range: 500kHz to 6.6GHz. The signal can be probed down to 100kHz. There are no calibration indicators in this range.

Frequency resolution: In the range of 500kHz to 1.3GHz, it is less than 3Hz; in the range of 1.3GHz to 3.3GHz, it is less than 6Hz; in the range of 3.3GHz to 6.6GHz, it is less than 12Hz. download.ni.com

Frequency annual stability: ±0.1ppm. download.ni.com

Phase noise: At 1GHz carrier, at 10kHz frequency offset, it is less than -110dBc/Hz.

2. Output Power Parameters

500kHz to 10MHz range: Power range -90dBm to 5dBm

10MHz to 50MHz range: Power range -90dBm to 8dBm

50MHz to 6.6GHz range: Power range -90dBm to 12dBm

Power resolution: Less than 0.1dB

Power typical accuracy: ±0.5dB

3. Modulation Parameters

Supports FM function: Maximum frequency offset ±1MHz

Supports 2-FSK function: Frequency offset can be programmed by software

Supports OOK function: Achieves amplitude on-off control

4. Interference and Harmonic Parameters

Harmonic components: Typical value less than -15dBc

Non-harmonic stray signal: Typical value less than -60dBc

5. Physical and Environmental Parameters

Equipment specification: 3U single-slot structure

Overall power consumption: Approximately 20W

Operating temperature range: 0℃ to 55℃

Cooling method: Forced air cooling of the cabinet

IV. Interface and Communication Configuration

Front panel interface

RF output interface: Uses SMA interface, standard impedance 50Ω, used for output RF signal

Reference clock input interface: Uses SMA interface, connects 10MHz external reference clock to achieve multi-device synchronization. download.ni.com

Bus and software configuration

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

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

Supports NI-TClk synchronization technology, enabling phase synchronization of multiple modules.

V. Core Functions

1. Ultra-wideband continuous wave output, covering very high frequency, extremely high frequency, cellular full frequency band, and mainstream microwave frequency band, meeting the requirements of high-frequency RF and microwave testing.

2. Built-in high-stability constant temperature crystal oscillator, with strong frequency stability and excellent phase noise indicators, ensuring the accuracy of RF measurement in the microwave frequency band.

3. Integrated multiple basic modulation functions, capable of directly outputting FM, 2-FSK, and OOK signals, without the need for additional baseband modules. 4. Equipped with automatic level control function, the output power is stable, reducing the influence caused by temperature changes and load fluctuations.

5. Standard PXI modular design, which can be used in conjunction with the same platform RF acquisition and analysis modules to build a complete automated RF testing system.

6. Adequate microwave frequency output power, suitable for power testing of high-frequency RF devices, 5G front-end modules, and microwave communication equipment. NI.

Six. Application Scenarios

1. Wireless communication testing, used for receiver sensitivity and anti-interference capability testing of 4G/5G mobile communication equipment, Wi-Fi 6/7, Bluetooth 5.0, satellite communication equipment, suitable for microwave frequency communication equipment NI.

2. RF component testing, completing gain, loss, and linearity detection of RF amplifiers, filters, mixers, RF switches and other devices, covering microwave frequency devices.

3. Radar and electronic equipment testing, outputting basic continuous waves and modulated RF signals, simulating simple radar excitation signals and RF environment, suitable for microwave radar equipment NI.

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

5. Automotive electronics testing, conducting functional and anti-interference tests for on-board millimeter-wave radar, on-board Bluetooth, and automotive-grade RF modules NI.

Seven. Usage and Maintenance Instructions

Installation and Power On

The equipment must be installed in a power-off state, fixed in a single slot of the PXI chassis, the chassis should be reliably grounded to prevent static damage to the hardware.

After installation, power on, preheat for 30 minutes to ensure that the internal constant temperature crystal oscillator reaches a stable working state, use the NI MAX software to complete the equipment self-check, confirm no hardware faults.

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

Cabling and Operation

Use 50Ω standard SMA coaxial cable for RF output terminal connection, tighten the interface to reduce signal reflection and loss.

It is not recommended to short-circuit the RF output interface for long-term grounding, to avoid damaging the final amplification circuit of the equipment, prefer to use a 50Ω matching load.

When working with multiple devices in synchronization, connect to an external 10MHz reference clock, enable the synchronization function, ensure that the phases of all devices remain consistent download.ni.com.

Daily Maintenance and Calibration

It is recommended to conduct a professional trace calibration once a year to compensate for the parameter offset caused by long-term use of the equipment, daily use can use the built-in self-calibration function of the equipment to correct the performance changes caused by temperature download.ni.com.

Regularly use a drying tool to clean the dust on the SMA interface surface, keep the interface dry and clean, when the equipment is idle for a long time, install a dust cap on the interface.

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

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