Index
- Bird Line Sections
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- Custom Meter Scales
- Customizing MB-1
- Documentation
- Downloads
- Expansion Features
- Evaluating Analog Meters
- Evaluating Couplers
- FAQ
- Features
- Generic Meter and RF current Measurements
- Hardware Diagnostics
- Interfacing your own Analog Meters
- Interfacing your own Couplers
- Multi-Coupler Display Feature
- Prices
- Programming MB-1
- Projects
- Quick Reference Guide - Menus
- Quick Reference Guide - Switches and LEDs
- Recent Site Updates
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- Simulator
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- Using Different Couplers
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Interfacing MFJ's Giant Meter to MB-1
The meter movement from MFJ's Giant SWR/Wattmeters is a 200 uA meter movement, and can easily
be interfaced to MB-1. Below we show a simple mounting
arrangement using an acrylic picture frame. After mounting the
meter, it is calibrated with MB-1's Panel Meter calibration
routine using 40 points for the power scale (the top power meter
scale is used for a full scale of 20, 200, and 2000 watts),
and 40 points for the SWR scale (SWR = 1.0 to 5.0).
Steps:
- A hole saw is used to cut the large
opening in the picture frame to accommodate the coil
assembly section of the meter movement, and four
small holes are drilled to line up with the mounting screws. The meter is
then mounted using four 4-40 nuts.
- The MB-1 Panel Meter Setup routine is entered.
We used Panel Meter port 3 in this example. (Panel Meter ports 1 and 2 are used for the
internal crossneedle meter). Calibration is nearly identical
to the steps shown
here.
- The simulator is shown exercising the meter. In this example, the simulator is set up to generate power samples in the range 0 - 2000 watts, and SWR samples in the range 2.50 - 3.50.
