ASHATA SWR 120 Digital Power Standing Meter Instruction Manual

1. Introducció

The ASHATA SWR 120 Digital Power Standing Meter is a compact and portable device designed for amateur radio enthusiasts. It provides direct digital display of forward power, reflected power, antenna power, antenna efficiency, standing wave ratio (SWR), and battery voltage. Featuring a built-in rechargeable battery, it operates without the need for an external power supply, making it ideal for field use.

Figure 1: ASHATA SWR 120 Digital Power Standing Meter with power range indication.

2. Característiques del producte

• No External Power Supply: Built-in rechargeable battery (1000mAh Polymer Lithium-ion) for portable operation.
• Pantalla digital: Clearly shows forward power, reflected power, antenna power, antenna efficiency, SWR, and battery voltage.
• Llums indicadores: Visual feedback for charging status and SWR levels (green for good, yellow for warning, red for high SWR).
• Alta precisió: Designed to meet the precision requirements of amateur radio operators.
• Potència: Supports 0.5W-120W (up to 200W peak, long-term testing recommended below 120W for FM, AM, CW modes; SSB mode optional).
• Interval de freqüència: 1.8MHz-50MHz (with reference value for V band).
• Funció d'alarma: Audible buzzer for high SWR and battery undervoltage.
• Canvi de mode: One-touch display and mode switching functionality.

3. Especificacions

4. Components mésview

Familiarize yourself with the main components of your SWR 120 meter:

• Interruptor d'alimentació: Located on the front panel, used to turn the device ON/OFF.
• ANT Port (SO239): For connecting your antenna.
• TX Port (SO239): For connecting your radio transmitter.
• Port de càrrega tipus C: Per carregar la bateria interna.
• Pantalla digital: Shows measurement values and status.
• Control Buttons (UP/DOWN/M/U): For navigation and mode selection.
• Indicator Lights (ALERT/FULL/CHARGE): Provide visual status.

Figure 2: Front panel showing Power switch and ANT port.

Figure 3: Side panel showing TX port and Type-C charging port.

5. Configuració i connexions

To set up your SWR 120 meter for use:

1. Ensure the device is fully charged before first use (refer to Section 8: Charging the Device).
2. Connecteu la vostra antena al ANT (Antenna) port on the SWR meter.
3. Connect your radio transmitter to the TX (Transmitter) port on the SWR meter.
4. Turn on the SWR meter using the PODER interruptor.

6. Funcionament bàsic

Once connected and powered on, the SWR 120 meter will display real-time measurements on its digital screen.

Figure 4: Digital display showing forward power (FWD) and SWR readings.

• Encès: Flip the red PODER switch to the ON position. The digital display will illuminate.
• Lectura de mesures: The display will show forward power (FWD W) and SWR (SWR) values. It also indicates battery voltage (BAT).
• Canvi de mode: Utilitza el M/U button to cycle through different display modes or measurement parameters if available.
• Ajust de la configuració: El UP i ABAIX buttons may be used for adjusting certain settings or navigating menus, if applicable to the current mode.

7. Indicator Lights and Alarms

The SWR 120 meter provides visual and audible feedback for various operational states:

• VSWR Indicator Lights:
  • Llum verda: On when VSWR is less than 1.5 (optimal).
  • Yellow Light (ALERT): On when VSWR is greater than 1.5 and less than 2.5 (warning).
  • Llum vermella: On when VSWR is greater than 2.5 (critical).
• VSWR Buzzer Alarm:
  • If VSWR is greater than 2.5 and less than 3, the buzzer will alarm intermittently.
  • If VSWR is greater than 3, the buzzer will alarm continuously.
  • The buzzer can be turned off with one key press (M/U button).
• Bateria Undervoltage Alarma:
  • Si la bateria voltage is low, the buzzer will continuously prompt, and the yellow indicator light will be on.

8. Càrrega del dispositiu

The SWR 120 meter features a built-in rechargeable battery. To charge the device:

1. Connect a standard Type-C USB charging cable to the 5V/1A Type-C port on the side of the meter.
2. Connecteu l'altre extrem del cable a una font d'alimentació USB compatible (per exemple, un adaptador de paret, un port USB de l'ordinador).
3. Indicador de càrrega:
   • The red light (CHARGE) is displayed when charging while the device is powered on.
   • The green light (FULL) is displayed when the battery is fully charged.
4. Allow sufficient time for the battery to fully charge for optimal performance.

9. Manteniment

To ensure the longevity and proper functioning of your ASHATA SWR 120 meter:

• Mantingueu el dispositiu net i lliure de pols i humitat. Feu servir un drap suau i sec per netejar-lo.
• Eviteu exposar el dispositiu a temperatures extremes o a la llum solar directa.
• No intenteu obrir la casing or modify the internal components, as this will void any potential warranty and may damage the device.
• Guardeu el dispositiu en un lloc segur quan no l'utilitzeu per evitar danys físics.

10. Solució De Problemes

If you encounter issues with your SWR 120 meter, consider the following common problems and solutions:

• El dispositiu no s'encén:
  • Assegureu-vos que la bateria estigui carregada. Connecteu el dispositiu a una font d'alimentació amb el cable tipus C.
  • Verifiqueu que l'interruptor d'alimentació estigui en la posició ON.
• No readings on display:
  • Check all cable connections (antenna to ANT, radio to TX) are secure.
  • Ensure the radio is transmitting power.
• High SWR readings:
  • Inspect your antenna system for proper tuning and condition.
  • Check antenna connections for shorts or open circuits.
  • Ensure the operating frequency is within the antenna's designed range.
• Buzzer alarm sounds continuously:
  • This indicates very high SWR (greater than 3) or low battery voltage. Address the SWR issue or charge the battery.
  • Press the M/U button to temporarily silence the buzzer.
• Bateria subvoltage alarma:
  • Charge the device immediately using the Type-C port.

11. Informació sobre garantia i assistència

For warranty claims or technical support, please refer to the retailer or manufacturer's official website. Keep your purchase receipt as proof of purchase. Specific warranty terms and conditions may vary.