To open the configuration menu, press and hold the MENU button for approximately 3 seconds.
The factory-set user PIN is: 4444
The current software version uses a numeric touchscreen keypad for PIN entry. Enter the four-digit PIN and confirm it to access the configuration menu.
The configuration menu includes the following settings:
Sets the full-scale value of the RF output power meter.
Factory default:
1300 W , MAX 9990 W
Sets the full-scale value of the reflected-power meter.
Factory default:
1300 W
Sets the full-scale value of the RF input-power meter.
Factory default:
30 W
The alarm menu allows the user to define the maximum permitted operating value for each monitored parameter.
Activates the alarm when the measured RF output power exceeds the selected limit.
Factory default:
1100 W
Activates the alarm when reflected power exceeds the selected limit.
Factory default:
100 W
Activates the alarm when the measured SWR exceeds the selected limit.
Factory default:
2.00
Activates the alarm when RF input power exceeds the selected limit.
Factory default:
3.0 W
Activates the alarm when the measured amplifier temperature exceeds the selected limit.
Factory default:
65 °C
Activates the alarm when the measured current exceeds the selected limit.
Factory default:
30 A , MAX 200A
The AUTO OFFSET function compensates for residual current readings caused by sensor, amplifier or ADC offset.
The procedure must be performed while the RF power amplifier is switched on but is not drawing operating current.
When AUTO OFFSET is activated, the meter:
This allows the current display to return closer to 0.0 A when the amplifier is idle.
Tapping the SWR/REF indication on the main screen switches the second meter display between:
The selected mode is automatically stored in memory and remains active after the unit is switched off and powered on again.
The power display can operate in either:
The selected PEP/AVG mode is stored in EEPROM and is restored automatically after power cycling.
The HELLO TEXT option allows the user to edit the startup message displayed when the unit is switched on.
The startup message consists of:
The stored message is displayed briefly during startup before the normal measurement screen appears.
The ALARM COUNTS menu stores a separate event counter for each alarm category:
This allows the user or service technician to check how many times each operating limit has been exceeded.
Deleting the stored alarm history requires the separate factory administrator PIN: 1821
This administrator PIN is different from the normal user PIN and is used only for protected service functions such as clearing the alarm counters.
When an alarm condition occurs, the alarm output is activated.
After the fault disappears, the output does not switch off immediately. It remains active until approximately 5 seconds have passed without any active fault.
This delay prevents rapid alarm switching when a measured value is fluctuating close to the selected limit.
| Parameter | Factory Default |
|---|---|
| PWR meter scale | 1300 W |
| REF meter scale | 1300 W |
| INP meter scale | 30 W |
| PWR alarm | 1100 W |
| REF alarm | 100 W |
| SWR alarm | 2.00 |
| INP alarm | 3.0 W |
| TMP alarm | 65 °C |
| AMP alarm | 30 A |
Configuration values and frequently used operating selections are retained in non-volatile memory.
The following settings remain stored after the unit is switched off:
The information above follows the configuration notes included in the supplied project material.
The supplied unit includes only the digital display board, CPU and touchscreen display.
The external RF measurement section is not included. This means that the product does not include:
RF input and output connectors
Directional coupler or RF sampling circuit
RF power detector
Forward-power detector
Reflected-power detector
SWR measurement hardware
RF-to-DC conversion circuitry
The display board cannot accept RF signals directly.
A separate external RF detector circuit is required to sample the radio-frequency signal and convert the measured forward power, reflected power and input power into suitable DC voltages for the board’s ADC inputs.
The external detector must provide the following signals:
PWR: DC voltage proportional to forward RF power
SWR/REF: DC voltage proportional to reflected RF power
IN: DC voltage proportional to RF input or drive power
The PWR and SWR/REF detector outputs should be calibrated so that the voltage approaches, but does not exceed, approximately 5 V at the maximum selected RF power. This provides the best usable ADC range and helps maintain a linear and stable indication.
Included:
Digital meter PCB
Microcontroller and measurement CPU
Touchscreen display
ADC processing and display functions
Menu system
Alarm settings and alarm output
Current, voltage and temperature display functions, when suitable external signals or sensors are connected
Not included:
RF directional coupler
RF connectors
RF detector diodes
Forward and reflected-power sensing circuit
SWR detector hardware
RF input detector circuit
External shunt and current-sense amplifier
Temperature sensor and other external sensing components, unless specifically stated
Important: The user or installer must provide a compatible RF sampling and detector circuit. RF must never be connected directly to the ADC inputs of the digital meter board.
Technical Experience Required
This product is intended for users who already have practical experience with:
RF power amplifiers and transmitters
RF detector and directional-coupler circuits
Low-voltage analogue measurement signals
ADC inputs and signal calibration
High-current DC power supplies
Shunt current measurement
Electrical grounding and safe wiring practices
The unit is not a complete plug-and-play RF wattmeter. It is a digital display and control platform that requires compatible external detector circuits, sensors, calibration and correct installation.
Incorrect wiring, excessive voltage at an ADC input, improper grounding, reversed polarity or direct connection of RF energy to the display board may damage the board, the amplifier or other connected equipment.
Before Purchasing
Before purchasing, the customer should make sure that they:
Understand what is included and what is not included
Can build or connect the required RF detector and sensing circuits
Can calibrate the PWR, SWR/REF, IN and CUR channels
Can safely work with the 12 V control supply and the 48 V high-power amplifier supply
Can verify that all detector outputs remain within the permitted ADC input range
Customers who are uncertain about compatibility, wiring, calibration or the required external circuits should contact us before placing an order.
We strongly recommend asking all necessary technical questions in advance and providing details about the intended amplifier, operating power, supply voltage, directional coupler, detector circuit and current shunt.
This helps ensure that the product is suitable for the intended application and can be installed safely and used correctly.
Important notice: Purchase and installation should only proceed when the user is confident that they have the required knowledge and equipment, or access to a qualified technician. The seller cannot be responsible for damage caused by incorrect wiring, unsuitable external circuits, excessive input voltage, improper calibration or installation by an inexperienced person.
Thank You , SV1EDT / LZ