MFJ-269 Instruction Manual HF/VHF/UHF SWR Analyzer
8
3.0
MAIN MENU and DISPLAY
WARNING: NEVER APPLY RF OR ANY OTHER EXTERNAL VOLTAGES TO THE ANTENNA
PORT OF THIS UNIT. THIS UNIT USES ZERO BIAS DETECTOR DIODES
THAT MAY BE DAMAGED BY EXTERNAL VOLTAGES. READ SECTION 2.0
BEFORE APPLYING POWER TO THIS UNIT! INCORRECT SUPPLY
VOLTAGES CAN ALSO DAMAGE THIS UNIT.
3.1 General Connection Guidelines
The
“ANTENNA”
connector (“N” female) on the top of the MFJ-269 provides the primary RF measurement
connection. This connector is used for all measurements except frequency counter measurements.
The
“POWER”
connector (2.1 mm type) is described in section 2.0. Be sure to read section 2.0 before operating
this unit. Improper or incorrect power supply voltage or wiring could permanently damage this unit.
The
“FREQUENCY COUNTER INPUT”
connector (BNC type) is for frequency counter use only. Correct use
of this connector is described in section 4.5.
3.2 Power-up
Display
CAUTION: THERE IS A ‘‘UHF’’ SWITCH LOCATED AT THE UPPER LEFT-HAND
SIDE OF THE ANALYZER. THIS SWITCH SHOULD BE PRESSED AND
LOCKED FOR UHF OPERATION ONLY WHEN UHF OPERATION IS DESIRED
AND ONLY AFTER THE UNIT IS POWERED UP. FOR INFORMATION ON
UHF OPERATION, SEE SECTION 3.4
Note:
The following is a description of the opening or default menu used by the MFJ-269. This unit
also has an advanced user section in section 4.0.
After turning on the
"POWER"
switch, or after applying external power with the
“POWER”
switch on, a
sequence of messages appears on the display.
The first message is a program version,
this "VER" number indicates the software version.