HTOOL SA8 Spectrum Analyzer & Signal Generator User Manual

1. Introduction

The HTOOL SA8 is a portable spectrum analyzer designed to display the spectrum of signals within a frequency range of 35-6200MHz. It is capable of determining the amplitude and frequency of spectral components contained within a signal. Equipped with an internal signal generator, it allows for the measurement of amplitude-frequency characteristics of both active and passive devices such as amplifiers, repeaters, and filters.

2. Safety Precautions

2.1 General Safety Requirements

• The instrument should only be used by personnel familiar with this manual and relevant electrical safety procedures.
• Exercise caution when inserting or removing the charger to avoid injury. Use only approved sockets and chargers.
• To prevent damage to wires and connectors, avoid hanging objects on them, applying paint or glue, and disconnecting them from power lines.
• Do not allow unauthorized individuals to use, disassemble, or repair the equipment.
• If a fault is detected, immediately stop operation and shut down the instrument.
• Always turn off the device and other equipment when leaving the workplace.
• Do not use the device in hospitals or operate it unattended. Use near medical equipment is only permitted with the consent of medical personnel.

2.2 Operating Environment

• Operating temperature: 0°C to +50°C.
• Relative air humidity: Not greater than 75%.
• The analyzer is not suitable for use in open areas during snow or rain, or in corrosive or explosive environments (dust, steam, gas).
• Avoid exposing the device to extreme temperatures (very low or very high) as this may damage the internal battery.
• Do not move the equipment with cables and wires connected.
• Do not apply excessive force to control buttons or the screen.
• Avoid dropping or contact with electricity.

Note: The manufacturer is not responsible for damage caused by unauthorized software upgrades or modifications.

3. Equipment Overview

The HTOOL SA8 unit comprises the main device, a 3.2-inch color resistive screen, and various input/output ports and control buttons.

3.1 External View and Dimensions

The device features a compact design for portability.

3.2 Ports and Controls

1. Antenna input RF IN: For receiving RF signals.
2. Signal generator output TG OUT: For transmitting generated signals.
3. Housing: The main body of the device.
4. Color resistive screen (3.2"): For displaying information and user interaction.
5. Battery charge indicator: Indicates charging status.
6. Connector type C USB: For charging and data connection.
7. Standby button on/off: Power control.

3.3 Control Buttons

The device features several buttons for navigation and control:

• MKR (Marker): Used for setting markers. A long press (over 2 seconds) opens the analysis signal marker and peak menu.
• MENU: Opens the main menu.
• FREQ (Frequency): Displays frequency parameters. A long press (over 2 seconds) opens the menu to set the frequency range.
• AMPL (Amplitude): Outputs amplitude parameters. A long press (over 2 seconds) opens the menu to set amplifier deviation parameters.
• Arrow Buttons (Left, Right, Up, Down): For navigation and adjusting values.
• SPAN (+/-): Changes the frequency range (span) of the signal being analyzed.

4. Setup and Initial Operation

4.1 Turning the Device On/Off

• Power On: When the device is off, press and hold the power button (7) for more than 2 seconds. The screen will display "HTOOL" and a welcome message before switching to normal operation.
• Power Off: When the device is running, press and hold the power button (7) for more than 2 seconds. The screen will display "Shutdown" before turning off.

4.2 Language Selection

The device supports multiple languages. To change the language:

1. From the main menu, select "Device".
2. Choose your desired language (e.g., English, Russian, Chinese) from the options.

4.3 Initial Frequency Measurement Method

To perform a frequency measurement, ensure the device is powered on and cables are properly connected.

1. Install one RG316 cable to each of the RF IN and TG OUT ports.
2. Navigate to the signal generator settings to confirm power and center point values.
3. Adjust power and frequency settings as needed.
4. Observe the spectrum display; data that is sufficiently close to expected values is considered normal.

5. Operating Instructions

5.1 Screen Grid and Information Labels

The device screen is divided into a proportional grid. The horizontal axis represents frequency, increasing linearly from left to right. The vertical axis represents amplitude, calibrated logarithmically.

The screen displays various information, including the number of scan points ("point count") and scan time in milliseconds ("ms").

5.2 Main Menu Navigation

To access the main menu, press the "MENU" button. The main menu provides access to various functions:

• Frequency: Set the frequency range for analysis.
• Generator: Adjust signal generator frequency and power.
• Amplitude: Set amplitude parameters (step size, screen grid ratio, input resistance, maximum harmonic signal level).
• Device: Set language modes, display device ID, version number, and device name.
• Markers: Set visual amplitude markers.
• Presets: Save and load custom settings.

5.3 Setting the Frequency Range

To set the frequency range, press "MENU", then select "Frequency". Alternatively, long-press the "FREQ" button for about 5 seconds.

Options include:

• Center: Set the center frequency for the analyzed range.
• Span: Define the total frequency range.
• Start/Stop: Set the initial and final frequencies of the measured range.

Enter values using the on-screen numeric keypad. Use "Del" to delete incorrect values and "Cancel" to reject input. Press "MENU" to exit.

5.4 Setting Amplitude Parameters

To set amplitude parameters, press "MENU", then select "Amplitude". Alternatively, long-press the "AMPL" button for about 5 seconds.

Parameters include:

• Grid step: Sets the step size of the screen scale grid (5 dB or 10 dB).
• Z in: Input/output impedance (50 Ohm or 75 Ohm).
• Scale: Vertical scale values (dBm or dBuV).
• Reference amplitude: Maximum input harmonic signal level that avoids receiver overload.

5.5 Menu Settings: Mark and Signal Peaks

To access marker and peak settings, press "MENU" and select "Markers". Alternatively, click "MKR" for quick access.

• Max Trace (Maximum Tracking): Displays the maximum signal value and draws a red line along it. Touch the screen to fix the track.
• Min Trace (Minimum Tracking): Displays the minimum signal value and draws a green line along it. Touch the screen to fix the track.
• Waterfall Mode: Displays the spectrum below the main spectrum, useful for analyzing background noise over time.
• Marker: Visual indicator at a specified frequency. Up to four multicolor markers can be used.
• Peak: Visual indicator of the maximum amplitude over the entire frequency range. Up to four multicolor peak indicators can be used.

To set a marker frequency, enter the value using the numeric keypad. Markers can be switched to peak tracking mode.

5.6 Signal Generator Frequency and Power Settings

To set the signal generator, press "MENU" and select "Generator".

1. Enable the signal generator by moving the slider to "On".
2. Set the output frequency (35-6200 MHz) and power (-15 to -25 dBm) using the numeric keypad or selection areas.

5.7 Signal Source Tracking (S21, S11, SWR)

To enable signal source tracking, first set the frequency start and stop range. If tracking is enabled and calibrated, the frequency cannot be changed without discarding calibration data.

• S21 (Transmission Coefficient): Measures the transmission characteristics.
• S11 (Reflection Coefficient): Measures the reflection characteristics. Calibration involves setting the DUT port according to standard components (open/closed/load for 50Ω).
• SWR (Standing Wave Ratio): Measures the standing wave ratio.

The S11 and SWR calibration data can be shared. Normalization functions are available for these measurements.

6. Custom Settings Menu

The device allows saving up to four user settings (frequency range, attenuator value, signal generator settings, etc.) in the "Presets" menu. Press "MENU" and select "Presets".

• To save settings, click the floppy disk icon. Your settings will be displayed on the left side.
• If all four slots are occupied, you can overwrite existing settings.
• To activate saved settings, click the corresponding field.

7. Specifications

8. Maintenance

• Cleaning: Use a soft, dry cloth to clean the device. Avoid using harsh chemicals or abrasive materials.
• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Battery Care: Follow general battery care guidelines to prolong battery life. Avoid overcharging or fully discharging the battery frequently.
• Software Updates: The device supports firmware updates. Refer to the manufacturer's official channels for update instructions.

9. Troubleshooting

• Device not turning on: Ensure the battery is charged. If using a charger, ensure it is properly connected and functional.
• Incorrect readings: Check cable connections. Verify that the frequency range and amplitude settings are appropriate for the signal being measured. If analyzing frequency spans exceeding 40 MHz, be aware that measurement accuracy may decrease (error up to 6 dB). For precise measurements, reduce the range width to less than 40 MHz.
• Screen issues: If the screen displays an error message about dynamic range being exceeded, the input signal level might be too high. Consider using an external attenuator or adjusting the reference amplitude.
• System unresponsive: Try restarting the device by turning it off and on again.
• Software issues: Ensure your device firmware is up to date. If issues persist, contact authorized service personnel.

10. User Tips

• For quick signal detection, the wider frequency span can be useful, but remember to narrow it down for more precise power measurements.
• Utilize the marker and peak functions to pinpoint specific frequencies and monitor signal amplitude changes effectively.
• Experiment with Waterfall Mode to analyze background noise and subtle signals over time.
• Regularly check for and install firmware updates to ensure optimal performance and access to new features.

11. Warranty and Support

For maintenance and repair, only the manufacturer or authorized service center should be contacted. Unauthorized disassembly or modification of the device will void the warranty.

The device supports firmware updates. For the latest information and support, please refer to the official HTOOL resources. The communication protocol for the HTOOL-SA8 allows for control and data acquisition via a local Type-C interface (virtual serial port), requiring driver installation.

Version History