MFJ MFJ-815D - Calibration Refinements; Calibrating Reflected Power Scales; Note on SWR Calibration

MFJ-815D Deluxe HF True Peak Reading SWR/Wattmeter Instruction Manual
5
Meter Calibration (cont.)
8. With the 3000/300 Watts button pushed in for the 600 Watt reflected scale,
Transmit 100 Watts as indicated on the reference meter. Adjust the HI REF trim
pot to set the reflected power scale to 100 Watts.
9. SWR requires no calibration.
Figure 1: Test Setup
Figure 2: PCB Layout and Trim Pot Location
Transmitter/
Transceiver
Standard
Reference
Wattmeter
MFJ-815D
SWR/
Wattmeter
50-Ohm
Dummy Load
HI FWD
LO REF
HI REF
LO FWD