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Bird AT-400 Antenna Tester
22
Select Measurement Units
Antenna match information can be presented using four
different measurement units. Depending on your
application, follow the steps below to select Rho, VSWR,
%Match or Return Loss.
y Press the MENU key.
y Press the SWEPT FREQ key.
y Press the MEAS UNITS key.
y Press the UNITS key.
y Press either the RHO, VSWR, %MATCH or RETURN
LOSS key. The selected unit will be shown on the left
side of the display.
y Press RETURN to go back one menu level or MENU to
return to the top menu level.
Select Auto or Manual Scale
Selecting the scale simply sets up how the information will
look on the display.
y Press the MENU key.
y Press the SWEPT FREQ key.
y Press the MEAS UNITS key.
y Depending on desired mode press either AUTO or
MANUAL SCALE:
AUTO SCALE - the units scale changes and the Antenna
Tester begins sweeping.
MANUAL SCALE - the cursor will blink on the minimum
scale value and Manual Scale will be highlighted.
1. Enter the desired value using the numeric keypad or
change the value using the UP/DOWN arrow keys.
2. Press the ENTER key. The cursor will blink on the
maximum scale value.
3. Enter the desired value using the numeric keypad or
change the value using the UP/DOWN arrow keys.
4. Press the ENTER key. The tester will begin sweeping.