TB 9-6625-2358-50
Table 6. Directional Power Sensor Model 4025 - Continued
Band pass filter band
difference indication (W)
setting (MHz)
4
∠ 4%
1.0
5
∠ 4%
1.7
6
∠ 4%
2.5
b. Adjustments
(1) Position cursor on controller screen to "FORWARD FREQ".
(2) Press "D" on the controller keyboard and use arrow keys to move cursor to the
first data point, press "Enter" to delete the data point and press "Y" to confirm the deletion.
(3) Add new calibration data point, press "Enter" (R).
(4) Wait for a stable power level as indicated by the WATTS annunciator on the
(5) Repeat steps (2) through (4) for the remaining frequencies (R).
(6) After completing all calibration data points for FORWARD FREQ, turn off RF
power. Remove and reinstall the directional power sensor with the RF source connected to
the LOAD side and calorimeter connected to the SOURCE side of the directional
power sensor.
(7) Press RF power meter front panel "RFL" button to display RFL.
(8) Repeat technique of steps (2) through (5) above for all calibration data points
under REFLECTED FREQ.
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.