MFJ MFJ-817C Instruction Manual Download Page 4

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MFJ-817C Deluxe VHF/UHF True Peak Reading SWR/Wattmeter

Instruction Manual

Meter Calibration (cont.)

8. With the

300/30 Watts

button pushed

out

for the 6 Watt reflected scale, Transmit

1 Watt as indicated on the reference meter. Adjust the LO REF trim pot to set the
reflected power scale to 1 Watt.

9. SWR requires no calibration.

10. Repeat each calibration for each frequency if needed until the meter has the

correct readings on each frequency.

Figure 1

: Test Setup

Figure 2

: PCB Layout and Trim Pot Location

VHF/UHF

Transmitter/

Transceiver

Standard

Reference

Wattmeter

MFJ-817C

SWR/

Wattmeter

50-Ohm

Dummy Load

HI FWD

LO REF

HI REF

LO FWD

Summary of Contents for MFJ-817C

Page 1: ...be installed inside the meter with a battery clip that is included The rear panel accepts a 2 1 mm coaxial plug with the center conductor positive and the sleeve negative The negative lead is grounde...

Page 2: ...t voices the PEP reading is three to five times higher than the average voice power reading The most accurate PEP readings are obtained only with sustained carrier voice or two tone test modulation Du...

Page 3: ...emove the top of the MFJ 817C 3 Connect the Test Setup equipment as shown in Figure 1 Use a 50 ohm dummy load for the antenna Set the Transmitter to the 144 220 440 MHz in the VHF UHF band 4 With the...

Page 4: ...ce meter Adjust the LO REF trim pot to set the reflected power scale to 1 Watt 9 SWR requires no calibration 10 Repeat each calibration for each frequency if needed until the meter has the correct rea...

Page 5: ...662 323 0549 or the MFJ Factory at 662 323 5869 You will be best helped if you have your unit manual and all information on your station handy so you can answer any questions the technicians may ask...