Start with the operating instructions and the What you will see tables. Open the Technical explanation sections only when you want adjustment ranges and additional measurement detail.
BCR-10K RF Wattmeter | User Manual | October 2026
Dashboard layout (screen captured with earlier firmware).
This manual describes operator-facing functions of the BCR-10K RF Wattmeter. The instrument remains in development; verify final firmware menu labels and behavior before printing a production edition. Photographs supplied by the project owner show firmware m172.
BCR-10K Remote compatibility: The optional BCR-10K Remote PC application supports Windows 10 and Windows 11 PCs only. Chromebooks/ChromeOS are not supported. See Remote Application for connection requirements.
Illustration note: Some retained photographs show earlier firmware menu labels and modes. They illustrate navigation only; the release mode names are PEAK, AVERAGE, and PEAK HOLD. Updated production screenshots should replace older mode-selection/settings images before customer release.
1. Quick start
• Connect the forward/reflected detector hardware in its prescribed RF installation and apply power to the meter. Use a suitable dummy load and follow the transmitter manufacturer’s power limits.
• On the dashboard, MODE selects the displayed measurement method. RANGE opens the full-scale selection screen. REF and SWR show reflected power and standing-wave ratio; MENU opens setup.
• Select an appropriate full-scale power range before transmitting. Start with a range safely above expected power, then choose a lower range for more scale resolution if appropriate.
• Choose AVERAGE for a steady reading, PEAK for changing voice peaks, or PEAK HOLD to retain a maximum.
• Do not regard a changed display response or gain setting as improved detector calibration. Use known reference RF power and proper calibration procedures when accuracy matters.
2. Dashboard and controls
Active mode appears under the central power value; range and telemetry appear around the scale.
| MODE | Changes the measurement method; the highlighted/current mode is shown on the dashboard. |
| REF | Displays reflected-power information. |
| SWR | Displays standing-wave ratio derived from forward and reflected measurements. |
| RANGE | Chooses the displayed full-scale power range. |
| MENU | Opens the main operator menu. |
| BAT | Shows the battery status when available. |
3. Measurement modes
The BCR-10K customer operating modes are PEAK, AVERAGE, and PEAK HOLD. They describe different aspects of the same RF signal; different indications do not automatically mean the meter is inaccurate.
PEAK
What it does: Captures strong, short-term RF power peaks. This is the normal choice for observing changing voice-envelope peaks.
What you will see: The needle and wattage indication respond to strong speech peaks. A longer WINDOW retains recent peaks in the calculation for longer; a shorter window follows changes more promptly. A higher PEAK COUNT blends more of the strong peaks, reducing the effect of a single isolated crest. DISPLAY RATE controls how often the displayed result updates, not the transmitter's actual power.
Technical details
PEAK uses the existing moving-window detector processor: short peak buckets are retained over a selected window and the highest selected bucket values contribute to the indicated result. Changing the controls alters the statistic and response; this does not change raw detector calibration. The prior name is retained only internally for compatibility, not as a customer mode name.
AVERAGE
What it does: Indicates the sustained or averaged RF power rather than momentary voice crests. Use it for a steady carrier or when average power is the quantity of interest.
What you will see: On a steady carrier, the reading settles near a stable value. During speech it typically reads lower and varies less than PEAK. Changing Global Gain changes the indicated watts at the same input; it is not a transmitter output-power control.
Technical details
The average indication and any display smoothing have different roles: averaging changes the measured statistic, while presentation damping governs how quickly the numbers and needle visually settle. Global gain scales the reported value and should not substitute for detector calibration.
PEAK HOLD
What it does: Remembers a detected high reading. Use MAX HOLD to retain a maximum for a selected duration, or TUNING PEAK for a peak-following indication that can drop as amplifier output falls.
What you will see: MAX HOLD stays on a detected maximum until its reset condition; TUNING PEAK rises promptly on a stronger peak, holds briefly, and then falls smoothly. The dedicated chapter below explains each timing control.
Technical details
MAX HOLD and TUNING PEAK use different retention/display behavior. Neither changes the detector hardware or increases measured RF power.
Release note: Engineering configuration must hide any other internal or development measurement modes before publication. This manual describes the three intended customer modes.
Peak Hold: MAX HOLD and TUNING PEAK settings
In Peak Hold mode, MAX HOLD and TUNING PEAK are different ways to handle an observed maximum. Choose the behavior that suits the task before changing timing values.
MAX HOLD
What it does: Stores the strongest observed reading. The MAX HOLD DURATION control determines when the retained maximum automatically resets.
What you will see: Raise the duration if you want more time to read a peak after transmitting. Lower it to clear an old maximum sooner while making repeated adjustments. A zero-millisecond selection is available; do not assume it behaves as an indefinite hold.
Technical details
Duration range: 0–10,000 ms in 250 ms increments. Default: 3,000 ms. This setting is stored separately from TUNING PEAK settings and survives restart. The RELEASE control is not shown while MAX HOLD is selected.
TUNING PEAK
What it does: Shows the peak while allowing the indication to drop again, making changes in amplifier output easier to follow.
HOLD — what you will see: Increase HOLD to keep an observed crest visible longer; decrease it for quicker response when output falls.
RELEASE — what you will see: Increase RELEASE for a slower, smoother decline after the hold interval; decrease it to make the indicated peak fall more promptly.
Technical details
Factory reference: HOLD 150 ms, RELEASE 400 ms. Both settings range from 0–3,000 ms in 25 ms steps. The release uses an exponential follower toward the measured peak. These controls shape the presentation of observed peaks; they do not create RF peaks that the detector did not observe.
For amplifier tuning: Start with TUNING PEAK. If the needle stays high after the actual power decreases, shorten HOLD or RELEASE. If each voice crest disappears too quickly to compare, increase one control a little at a time.
Gain adjustments and indicated power
What gain means: Gain settings change the power value displayed by the meter. They do not increase the transmitter's real RF output. A reading that rises after changing a gain value is not evidence that the amplifier is producing more power.
What you will see: Increasing a gain percentage generally raises the displayed wattage and needle position at the same input; decreasing it lowers them. Unlike hold and release controls, gain can change the actual indicated magnitude.
Technical details
The final-stage global gain affects indicated power; it does not calibrate the detector itself. Verify readings against a known RF reference before using gain to correct apparent errors. Mode-specific gain settings depend on release configuration.
7. Range selection
New manual ranges: 25 W and 250 W are now available in addition to the existing power ranges. The scale list is presented in numerical order. Select the smallest full-scale range that safely accommodates the expected power without clipping; selecting a range changes the display scale, not the physical input rating or detector calibration.
Power range menu: selected range is highlighted.
The pictured menu offers 10 W, 100 W, 500 W, 1.0 kW, 2.5 kW, 5.0 kW, and 10.0 kW. Choose a full-scale value suited to the expected RF power. A different display range changes the available scale and visualization; it does not make the detector safe for otherwise excessive RF power. Available ranges may depend on the installed release configuration.
8. Main menu and response speed
Main operator menu.
Independent arc and numeric response profiles.
ARC RESPONSE influences how the analog-style movement follows its target, while NUMERIC RESPONSE conditions the large power number independently. FAST reacts promptly but may look nervous; BALANCED aims for readable amplifier tuning; SMOOTH minimizes chatter at the cost of delayed visible response. These display conditioning selections are not recalibration controls and do not replace the acquisition/PEP algorithms.
9. Arc response tuning
Detailed arc-dynamics tuning screen.
The FAST profile is direct. BALANCED and SMOOTH use a virtual second-order meter movement. NAT FREQ (omega) sets the response’s characteristic speed: a higher value generally makes the arc react more rapidly. DAMPING (zeta) governs overshoot and oscillation: a lower damping ratio can produce livelier movement and overshoot, while a higher ratio tends to settle more conservatively. The values shown are 8.5 rad/s and 1.02. These are presentation dynamics, not direct detector settings.
Use RESTORE DEFAULTS if experimentation produces distracting motion. Do not tune arc motion to force it to agree visually with a separate peak algorithm; the arc and numerical readout may intentionally respond differently.
10. Audio and SWR
Audible feedback and SWR alarm controls.
STARTUP SOUND controls the power-up sound. STARTUP LEVEL changes its volume. SWR ALARM enables or disables the audible alert; ALARM LEVEL changes its loudness. SWR LIMIT selects the alert threshold (shown 3.0:1). TEST STARTUP and TEST ALARM let you listen without intentionally creating a mismatch.
SWR is calculated from the relationship of forward and reflected power; 1.0:1 is an ideal match, while larger ratios indicate more reflected power. The alert threshold affects notification, not the underlying measured SWR. For low forward power, SWR may be withheld or less meaningful; never infer a perfect match from an absent value.
11. Display and sleep
Display brightness, refresh, inactivity, and palette settings.
| BRIGHTNESS | Backlight intensity. Reduce for a dim room or increase for daylight; this does not change measured RF power. |
| REFRESH | Display refresh rate; the example shows 60 Hz. Changes screen redrawing behavior, not detector sample rate. |
| DIM AFTER | Inactivity timeout before dimming; example 10 min. Transmitted RF activity or touch may reset the timer. |
| DEEP SLEEP | Automatic deep-sleep option; pictured OFF. After sleep, use the documented physical wake action. |
| COLOR | Changes the visual color theme; picture shows NEON GREEN. Status text contrast may vary by theme. |
Brightness recovery: triple-click the physical sleep button to restore the display to 100% brightness. This recovery is intended for a screen accidentally dimmed too far to read.
12. Detector calibration
Calibration screen showing selected wattage point, voltage entry, capture and table tools.
Read-only plotted curve showing how detector voltage is mapped to watts.
Calibration associates known forward-detector voltages with known RF power levels. A correct table is essential because the detector transfer curve is nonlinear. It is not appropriate to adjust a PEP mode gain to conceal an incorrect power calibration.
• Use suitable RF reference equipment and a stable known signal. Select the correct calibration point and ensure the RF conditions match its intended power.
• CAPTURE triggers a timed acquisition of detector voltage for the selected reference point. Follow on-screen guidance and wait for the outcome; avoid changing RF power during capture.
• AUTO FILL computes intermediate points from existing anchors using the selected interpolation method. These computed points are estimates, not independently measured standards.
• METHOD selects the table interpolation behavior (pictured LOG-POWER). This can change results between calibration anchors.
• VIEW CURVE plots the current relationship and helps reveal anomalies; it does not prove calibration accuracy.
• CLEAR POINT removes a selected user point. SAVE TABLE writes the edited calibration data; do not assume unsaved edits survive restart.
The photographed screen is a dense diagnostics view; the actual readouts include raw and derived values. A trained calibrator may find them useful for investigating the input signal, but a routine user should focus on the selected power anchor, correct reference conditions, and confirmation of successful capture and save.
Calibration method
Current firmware uses the LOG-POWER calibration method. Earlier manuals may show selectable interpolation methods; these are no longer user-selectable.
What you will see: There is no calibration-method chooser to cycle through. Normal calibration-point editing, capture, review, and save operations remain the relevant user tasks.
Technical details
13. System, About, and factory reset
System menu.
About screen; installed firmware and serial identity appear here.
Factory reset confirmation. Read the data-preservation text before continuing.
SYSTEM provides engineering logging and profile controls primarily intended for diagnostics. These should normally remain untouched unless support requests a log. ABOUT identifies firmware revision and serial number; give these details when reporting a problem.
FACTORY RESET restores settings and user calibration. The pictured confirmation explicitly says factory calibration and touch calibration are preserved. Treat CONTINUE as consequential: back up user calibration and record customized settings before proceeding. CANCEL exits without reset.
14. Touchscreen calibration
Open MENU and select TOUCH CALIBRATE. Follow the prompts on the display, touching each requested target as accurately as possible. Avoid resting a finger or another object on the glass between targets. Confirm normal operation by testing several areas of the screen after completion. No photograph is needed: the targets are transient and should be followed as presented by the instrument.
If touch input is too inaccurate to access the menu, a hardware-button recovery route may be available on the installed firmware. Because this is a version-sensitive service gesture, consult the current product instructions rather than guessing a click sequence.
15. Operating examples
A. Checking steady carrier power
Select a range above the expected carrier output, choose AVERAGE, apply a continuous signal into a properly rated load, and allow the reading to settle. Compare with a known reference when checking accuracy. If the value changes rapidly, investigate actual RF variation before increasing display smoothing.
B. Comparing SSB speech peaks
Choose PEAK for moving-window crest comparison; use PEAK HOLD when you want to retain or track a maximum. Keep range, mode parameters, and gain unchanged between tests. Speak a repeatable phrase under consistent transmitter conditions. Do not compare a PEAK value directly with an AVERAGE value as though both represented identical measurement definitions.
C. Finding the maximum during amplifier adjustment
Select a suitable range and approved test signal. For a readable tuning display, use a moderate numeric response and a PEP mode suited to the signal. Change only one meter response control at a time. A long window or hold can leave a previous higher value visible after actual output has fallen, so allow time for the indication to catch up before deciding on a new adjustment.
Battery indication and charging
The BCR-10K shows battery voltage and an estimated battery percentage. Battery voltage may change when charging or when operating under load. The percentage is an estimate, not a direct measurement of remaining battery capacity.
Recommended USB wall charger
Brick City Radio recommends the Anker A2348 20W USB Charger for the BCR-10K RF Wattmeter.
Observed charging results: In actual BCR-10K testing, several other USB chargers never brought the meter’s displayed battery voltage to 4.2V. After using those chargers, the displayed battery voltage dropped rapidly when the meter operated on battery power, consistent with the batteries not reaching their full charge capacity.
With the recommended Anker charger connected, the BCR-10K displayed 4.222V. Based on these comparative observations, Brick City Radio recommends this charger for reliable charging performance.
Recommended charger: Anker A2348 20W USB Charger — Amazon.
Technical details
The 4.222V observation was recorded on the BCR-10K display while the charger remained connected. Loaded voltage sag after other charging sessions provides corroborating practical evidence of a lower attained state of charge, but the tests did not directly quantify ampere-hour capacity. Displayed charging voltage and terminal battery voltage may differ depending on measurement location and charger circuitry.
Technical details
The Remote application communicates with the meter over a USB data connection. PC operating-system support is distinct from USB charging compatibility: being able to charge the meter from a computer does not mean the computer can operate the Remote application. Firmware and Remote versions should be compatible before attempting advanced settings or software updates.
Depending on the installed meter firmware and matching Remote version, the application provides supported measurement display, operating/settings controls, and service functions. Available controls and screens may differ by software revision. Follow the Remote application's on-screen prompts for calibration and firmware updates; do not disconnect the USB cable during an active update.
Remote functions
If the meter is not detected, check the USB data cable, USB connection, Windows device recognition, and whether another program is using the same connection.
- Use a USB cable that supports data transfer, not a charging-only cable.
- Connect the BCR-10K to a compatible Windows 10 or 11 PC.
- Open BCR-10K Remote and select the connected meter using the controls supplied by the installed application version.
- Confirm that the application displays live meter information before relying on remote controls.
USB connection
Important: The Remote application currently supports only PCs running Microsoft Windows 10 or Windows 11. It will not run as a supported application on a Chromebook. A Linux edition may become available in the future, but no release date is announced.
| Operating system | Current support |
|---|---|
| Microsoft Windows 10 | Supported |
| Microsoft Windows 11 | Supported |
| Chromebook / ChromeOS | Not supported |
| Linux | Not currently supported |
| macOS | Not currently supported |
Supported computers
The optional BCR-10K Remote application lets you monitor readings and use supported meter functions from a compatible PC through a USB connection. The meter can also be operated independently using its touchscreen.
BCR-10K Remote Application
Advanced Operations — Calibration Table Management
Who should use this chapter: Operators with a known, reliable RF power reference. Incorrect calibration values can make every power display misleading. Before editing, export and retain a known-good copy of the existing table.
Calibration table basics
A calibration row pairs a known RF power in watts with the forward detector voltage measured at that power. The meter uses these anchors to translate measured voltage into power. The current firmware uses LOG-POWER interpolation; a choice of other interpolation methods is not offered to ordinary users.
Technical details
A calibration curve is a conversion model, not an independent measurement standard. Interpolated points should be checked with real RF references where practical. Imported rows must be checked for units, ordering, plausible voltages, and appropriate scope.
Editing a point on the meter
- Use a suitably rated load and an independently verified known-power source.
- Open CALIBRATION and select the intended power point.
- Edit or capture its detector voltage as appropriate. Verify the selected wattage and units before accepting.
- Review the point and inspect VIEW CURVE for unexpected jumps.
- Use SAVE TABLE to commit the validated changes. Reopen the table to confirm values remain as intended.
Capturing detector voltage
What it does: Records detector voltage while a known reference power is applied. What you will see: A capture progress/result indication, then a candidate point in the calibration editor. The captured voltage is a detector value, not the wattage produced by a calculation.
- Set the RF reference to the wattage corresponding to the selected calibration point.
- Hold the RF level steady for the capture interval and avoid changing modulation or drive.
- Choose CAPTURE; wait for a confirmed result, not merely the start of acquisition.
- Verify that the reported point agrees with the reference, then save the table using the appropriate meter controls.
Technical details
The acquisition uses a timed raw detector sample window; acceptance can differ for stable and modulated signals. A successful capture is not automatically proof that the table is stored permanently. Confirm both acceptance and subsequent save/readback.
BCR-10K Remote: import, export, and synchronize
Important distinction: Importing a file into the PC application, transferring data to the meter, and permanently saving the meter table are different operations. Do not assume that completing one completes the others.
Export and back up the current table
- Connect BCR-10K Remote to the meter using a USB data cable.
- Open the Remote calibration-table management view and read/synchronize the existing table from the meter, confirming the source shown in the application.
- Use the application's export/save-to-file operation. Give the backup a dated filename and keep the unmodified original.
- Open the exported data and confirm the expected calibration rows are present before making edits.
Import and edit a table
- Use the Remote calibration import/open operation to load the desired supported table file into the PC workspace.
- Check every power/voltage row, units, curve shape, and any missing or duplicate points.
- Edit rows as needed. Do not treat an imported table as active on the meter yet.
Transfer changes to the meter
- Confirm the correct meter is connected and its existing table has been backed up.
- Use the Remote calibration synchronization/commit operation for the intended transfer direction, PC to meter.
- Read the results and check for rejected or missing rows. Do not interrupt the USB connection during transfer.
- Perform the meter's required save/commit operation if not already confirmed by the software, then read the table back from the meter.
- Verify at least two known reference powers and inspect the calibration curve before returning the meter to normal use.
Remote voltage capture
With a stable, known RF reference applied, select the intended wattage point in Remote and initiate CAPTURE. Check the meter's reported capture result and point value, then explicitly commit and verify the table. A captured value shown on the PC does not by itself prove nonvolatile storage.
Technical details — synchronization safeguards
Remote and meter both maintain calibration-related state. A successful USB connection or command acknowledgment is not the same as a complete and persistent calibration-table transfer. The exact UI action labels and file formats must be confirmed against the shipped Remote build before final publication; do not infer that Import, Sync, Apply, or Save are interchangeable.
Calibration troubleshooting
Capture fails: Confirm the detector is connected and the applied RF signal satisfies the capture method's stability requirements. Curve has a sudden jump: Recheck wattage/voltage units and the adjacent anchors. Remote values disagree with meter: Verify transfer direction, save status, and readback. Reading changed after gain adjustment: Confirm gain separately from detector calibration.
Publication check: Button labels, exact file import/export formats, and PC-to-meter save semantics require a final screen-by-screen verification with the shipping Remote build; the procedural safeguards above are intentional and should not be weakened.
16. Troubleshooting
| Peak reading appears too high | Check PEP mode, mode-specific GAIN or VR1 calibration, range, and reference calibration. Do not assume all peak algorithms report the same statistic. |
| Indication remains high after signal falls | Shorten the PEAK window or PEAK HOLD timing as appropriate; also check display response. |
| Genuine voice peaks look too low | Check calibration and signal first. Then examine PEAK COUNT and WINDOW, and verify the selected measurement mode. |
| Numbers jump too much | Select BALANCED/SMOOTH numeric presentation, or review mode-specific temporal settings without changing gain. |
| Screen too dim to read | Triple-click physical sleep button for 100% backlight recovery. |
| SWR alert occurs unexpectedly | Check RF power, connections, antenna/load, reflected measurement calibration, and selected SWR LIMIT. |