Setting Maximum Transmit Power Level And Antenna Performance Tests; Changing Operating Mode For Tests; Changing From Opensky To Conventional - Harris M5300 Installation And Safety Manual

15 SETTING MAXIMUM TRANSMIT POWER LEVEL AND
ANTENNA PERFORMANCE TESTS
This section includes procedures to set the radio's maximum transmit output power level and to verify the
performance of the installation's mobile antenna system. The respective subsections include:


Changing Operating Mode for Tests


Required Test Equipment

Transmit Power Level Adjustments (for all operating modes)

Transmitting into a Dummy Load (a 50-Ohm RF Terminator)

Transmitting into the Mobile Antenna
CAUTION
CAUTION
15.1 CHANGING OPERATING MODE FOR TESTS
To complete tests in this section, placing the radio in a conventional mode and using an average-
responding wattmeter to measure RF transmit power is recommended. However, if the radio is not
programmed for conventional mode operations (i.e., OpenSky Trunking Protocol (OTP) is available but
EDACS Conventional P25 (ECP) is not), tests will require a peak-reading RF wattmeter to measure RF
transmit power. To select either conventional or OpenSky mode, use one of the following procedures:
15.1.1

Changing from OpenSky to Conventional

1. If necessary, apply power to the radio and turn it on.
2. Use the control head's / Ramp Control to scroll through the menu until Mode Menu appears in
the middle line of the display. This control is shown in Figure 8-1 and in Figure 8-2 on page 40.
3. Use the +/- Ramp Control to select an available conventional channel/system.
4. Confirm the selection by pressing the MENU button, then toggling the Ramp Control once (to
select Y for Yes), followed by pressing the MENU button again. The radio will enter the selected
mode as indicated by the display.
5. Select a conventional channel for test transmissions using either the / Ramp Control or the
System/Group/Channel Selection Control (required control per programming).
The accuracy of test results depends upon a DC power source in the range of 13.8 to
16 volts DC, with a current capacity of greater than 8 amps. Make sure the vehicle's
battery is fully charged by running the engine for a few minutes before the test, and
keep the engine running during the test procedures. Abide by the following
WARNING!
If the vehicle's engine must remain running, the vehicle location should be well
ventilated so exhaust fumes from the engine do not cause harm!
If a vehicle equipped with this radio requires jump-starting, the radio installation's
main AGC fuse (15-amp) should be removed from the holder prior to jump-starting.
Doing so will prevent damage to the radio system.
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