Bird Technologies 4421 - Manual (Page 49)

Maintenance
37
Functional Test
1. Turn the power meter off. The ON/OFF switch on the rear panel should be
OFF and the ac power cable should be connected.
2. Turn ON the ON/OFF switch on the rear panel of the meter.
3. While holding down the FWD and SWR push buttons, press the ON/OFF
button on the front panel of the power meter. Immediately release all three.
Note: The unit tests the display on power up cycling through and
activating each segment two times and then activating all segments at
once two times.
4. The power meter’s model number and revision date should scroll across the
display. If a dash “–” is displayed instead, then the meter is malfunctioning.
5. The power sensor’s model number and revision date should scroll across
the display. If a dash is displayed after the power meter data, then the
power sensor is malfunctioning.
Figure 16 Test Display, No Malfunction
Push Button Test
Note: If a push button is malfunctioning, return the power meter.
1. Disconnect the power sensor.
2. Turn the power meter ON.
Note: After the power up display disappears, a dash “–” should
scroll across the display.
3. Turn the power meter OFF.
4. Connect the power senson.
5. Turn the power meter ON.
Note: “AUTO” and “FWD” should be displayed, and a reading of
“0.00 W” (or a very low number).
6. Press RFL.
Note: “FWD” should change to “RFL” on the display. The reading
should remain the same.
7. Press SWR.
Note: “RFL” should change to “SWR”. “0.00 W” should change to
“ ” (underrange error).
8. Hold down MIN.
Note: “ ” should change to “ ” (overrange error).
9. Release MIN.
Note: “ ” should change to “ ”.
10. Press dBm.
Note: “SWR” should turn OFF and “dBm” should turn ON..
Meter’s
Model
Number
Meter’s
Software
Rev. Date
Sensor’s
Model
Number
Sensor’s
Software
Rev. Date
– . . 4 4 2 1 . . – 0 7 . 0 1 . 0 2 – . . 4 0 2 1 . . – 0 7 . 0 1 . 0 2 –