Bird Technologies AT-400 - Manual (Page 38)

Bird AT-400 Antenna Tester
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or fail will be displayed at the top of the display and an
audible tone can be enabled to indicate a fail situation.
Limit testing is probably the most labor-efficient mode for
operating the AT-400. Since all the software settings are
retained when the tester is turned off, once the limit test is
set up its simply a matter of connecting the next antenna
system, turning on the power and reading pass or fail.
Turn Audio On/Off
Audio tone for fail indication.
y Press the MENU key.
y Press the SWEPT FREQ key.
y Press the LIMIT key.
y Pressing the AUDIO key will toggle between on and off.
Selecting Limit Values
Valid limit values depend on measurement units selected.
Valid entries are:
VSWR- between 1.0 and 100.0
%Match- between 0 and 100%
Return Loss- between -32 and 0 dB
RHO- between 0.000 and 1.000
y Press the MENU key.
y Press the SWEPT FREQ key.
y Press the LIMIT key.
y Press the VALUE key. The cursor will blink next to off.
y Enter the desired value using the numeric keypad or
change the value using the UP/DOWN arrow keys.
y Press the ENTER key. Pass or Fail will be displayed, a
tone will be heard for fail if audio is enabled.