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MFJ-842 Mobile VHF/UHF SWR/Wattmeter

Instruction Manual

Meter Calibration (cont.)

7. With

the

POWER RANGE

button pushed

out

for the 5 Watt reflected scale,

Transmit 5 Watts as indicated on the reference meter. Adjust the LO REF trim
pot to set the reflected power scale to 5 Watts.

8. SWR requires no calibration. Read SWR directly from the crossing point of the

forward and reflected needles.

Figure 2: Test Setup

Figure 3: Trim Pot Location (Bottom View of MFJ-842)

Transmitter/

Transceiver

Standard

Reference

Wattmeter

MFJ-842

Mobile

SWR/

Wattmeter

50-Ohm

Dummy Load

LO REF

HI FWD

HI REF

LO FWD

Содержание MFJ-842

Страница 1: ...AUTION Read All Instructions Before Operating Equipment MFJ ENTERPRISES INC 300 Industrial Park Road Starkville MS 39759 USA Tel 662 323 5869 Fax 662 323 6551 COPYRIGHT 2006 MFJ ENTERPRISES INC C Mode...

Страница 2: ...tional handbooks or other official publications The copy of this manual provided to the customer will not be updated to reflect current data Customers using this manual should report errors or omissio...

Страница 3: ...cifications Frequency Range 140 525 MHz Input Impedance 50 Ohms Power Range 15 and 150 Watts Forward Power 5 and 50 Watts Reflected Power Power Accuracy 10 at full scale Minimum Input Power 1 Watts Co...

Страница 4: ...n 30 and 150 Watts In the 15W out position the forward power scale must be divided by 10 Each picket represents 0 5 Watt below 3 Watts 1 Watts from 3 to 15 Watts 3 Reflected power is displayed on the...

Страница 5: ...ttom Refer to Figure 2 for the Test Setup and refer to the Trim Pot Location in Figure 3 for trim pot location 2 Connect the Test Setup equipment as shown in Figure 2 Use a 50 ohm dummy load for the a...

Страница 6: ...ference meter Adjust the LO REF trim pot to set the reflected power scale to 5 Watts 8 SWR requires no calibration Read SWR directly from the crossing point of the forward and reflected needles Figure...

Страница 7: ...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 You can a...

Страница 8: ...MFJ 842 Manual Version 1A Printed In U S A 300 Industrial Park Road Starkville MS 39759...