Bird Technologies 4421 - Manual (Page 50)

Bird 4421 RF Power Meter
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11. Press dBm.
Note: “dBm” should change to “SWR”.
12. Press FWD.
Note: “SWR” should change to “FWD” and “ ” to “.0000 W” (or a
very low number).
13. Hold down MAX.
Note: “.0000” should change to “1.0000”.
14. Release MAX.
Note: “1.0000” should change to “.0000” (or a very low number).
15. Press LIGHT.
Note: The back-light should turn on.
16. Press LIGHT.
Note: The back-light should turn off.
17. Press s (up).
Note: The power meter should change ranges each time it is
pressed until it reaches “0.000 KW”.
18. Press t (down).
Note: The power meter should change ranges each time it is
pressed until it reaches “0.00 W”.
19. Turn the power meter OFF.
Repair
Front Panel (Cal Cart only)
Note: If the power meter is mounted in a Cal Cart, to access the
power sensor or the ac connections, it will be necessary to remove the
front panel of the Cal Cart.
1. Remove both screws on the front panel, between the RF connector and the
handle.
2. Pull on the handle set into the base of the front panel to remove it.
Note: When making AC connections, refer to the following wiring
diagram.
Figure 17 Cal Cart Wiring Schematic
WARNING
To avoid personal injury, disconnect the power cord from the AC line before
performing any maintenance, including fuse replacement or changing the
line voltage setting.