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| INSTALLATION |
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| ANALOG INPUT CHANNEL 1 |
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| 1. | CHANNEL TYPE | 3 |
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| 2. | DESCRIPTION | = | TX01 |
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| 3. | UNIT ID = |
| AI01 |
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| 4. | MEASUREMENT | UNITS = | Watts |
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| 5. | ALARM | DELAY | (1/4 sec) = | 3 |
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| 6. | LOWER | ALARM | LIMIT = | 0.0 |
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| 7. | UPPER | ALARM | LIMIT = | 125.0 |
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| 8. | ALARM | REPORT TYPES (1,2,3,4) = |
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| 9. | ALARM | RELAY | NUMBER = | 0 |
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| 10. | CHANNEL ENABLE METHOD | 0 |
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| 11. | CHANNEL ENABLE THRESHOLD = | 0.0 |
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| 12. | ANTENNA CHANNEL = | AI025 |
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| ENTER ITEM NUMBER TO CHANGE, |
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| "H" | FOR HELP MENU, "A" TO ABORT, |
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| OR "E" TO | END PROGRAMMING THIS CHANNEL: _ |
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Figure 19 - Analog Input Channel Screen Showing Antenna Channel Parameter
28.With the Setup Selection Menu shown on the terminal, type 1 (for item #1 - Return To Operation Select Menu) and press the Enter key.
29.The Operation Select Menu should then be shown on the terminal. Type 1 (for item #1 - Disconnect) and press the Enter key.
Calibration Screw |
30.The “Disconnected - Hit Any Key To Connect” prompt should then appear on the terminal.
POWER SENSOR CALIBRATION
The power sensor provides a DC voltage output representing the power through it. This calibration method uses an
Unidirectional Power Sensors
Use the following procedure to calibrate the unidirectional power sensors used at the output of each transmitter. Start with the transmitter for channel #1. The location of the calibration screw is shown in Figure 20.
Figure 20 - Unidirectional Power Sensor Calibration Screw
1.Turn off the 12V station power supply for the transmitter.
2.Disconnect the coax (from the power sensor to the combiner) at the power sensor end, and insert an in-line wattmeter (make sure the wattmeter is rated high enough to handle the power from the transmitter).
3.Disconnect the power sensor cable from the phono connector on the power sensor, and attach the DC voltmeter in its place (center pin is positive). (An alternate method is to disconnect the power sensor cable at the PMU - see interconnection diagram at end of manual - and attach the DC voltmeter to the end of the cable.)
4.Turn on the 12V station power supply for the transmitter.
5.Manually key the transmitter using the switch marked “REM KEY”, or press and hold the PTT switch on a hand-held microphone plugged into the transmitter.
6.Measure the DC voltage on the meter, look up this voltage in Table 6 (V in volts) to get the corresponding
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