14.4 Transmitting Into The Mobile Antenna - Harris M7300 Installation And Product Safety Manual

8. For a VHF band transmission, compare the wattmeter's reading with the target RF output power
range of between 39.8 and 63 watts (50 watts ±1 dB). This transmit output power range assumes the
radio is currently configured for high-power transmit.
For a 700 MHz band transmission, compare the wattmeter's reading with the target RF output power
range of between 15.1 and 23.9 watts (19 watts ±1 dB). This transmit output power range assumes
the radio is currently configured for high-power transmit.
For an 800 MHz band transmission, compare the wattmeter's reading with the target RF output power
range of between 27.8 and 44.1 watts (35 watts ±1 dB). This transmit output power range assumes
the radio is currently configured for high-power transmit.
9. If the wattmeter reading is within the range, record the measured value in the appropriate space on
the data collection form near the end of this manual.
If the wattmeter reading is outside the range, verify the radio's power supply voltage (i.e., battery
voltage) is within the specified range, recheck all connections and measure the RF output power
again. If this fails to produce a reading within the range, replace it and repeat this procedure. If
problems persist, contact the Technical Assistance Center (see page 20).

14.4 TRANSMITTING INTO THE MOBILE ANTENNA

1. Connect the antenna cable from the vehicle-mounted antenna to the wattmeter as shown in Figure
14-1.
2. If not already, turn the radio on and set it to the required operating mode (based upon available radio
programming and test equipment). Refer to Section 14.1 as necessary.
3. Set the radio to a test talk group or conventional channel, if available.
4. Position the wattmeter's slug to measure forward RF output power. Rotate it if necessary. The arrow
on the face of the slug must point away from the radio and towards the antenna for forward power
measurements.
5. For conventional mode transmissions, set the wattmeter to measure average RF power.
For OpenSky mode transmissions, set the wattmeter to measure peak RF power.
6. Key the radio's transmitter via the microphone's PTT button.
7. For a VHF band transmission, compare the wattmeter's reading with the target RF output power
range of between 39.8 and 63 watts (50 watts ±1 dB). This transmit output power range assumes the
radio is currently configured for high-power transmit.
For a 700 MHz band transmission, compare the wattmeter's reading with the target RF output power
range of between 15.1 and 23.9 watts (19 watts ±1 dB). This transmit output power range assumes
the radio is currently configured for high-power transmit.
Transmit only for as long as needed to take the measurement, then immediately
disable the transmission.
It is recommended that a test talk group/channel be allocated for this testing.
Otherwise, interference with other radio users in the system may occur. Also, during
transmissions, always observe the RF exposure-related safety information
presented in Section 1.2 (begins on page 6).
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