14 Performance Tests; 14.1 Changing Operating Mode For Tests; Changing From Opensky To Conventional - Harris M7300 Installation And Product Safety Manual

MM-014763-001, Rev. E

14 PERFORMANCE TESTS

This section includes procedures to verify the performance of the installation's mobile antenna system.
There are three (3) procedures in this section:

Changing Operating Mode for Tests

Testing by Transmitting into a Dummy Load (a 50-Ohm RF Terminator)

Testing by Transmitting into the Mobile Antenna
CAUTION
CAUTION

14.1 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) mode is available
but EDACS Conventional P25 (ECP) mode 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:
14.1.1

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 8-5 and in Figure 8-6 on page 55.
3. Use the +/- Ramp Control to select an available conventional channel/system.
74
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.
Prior to installation, the radio's power level should be configured appropriately. The
wide range of power levels indicated in the following procedures takes into account
such things as: customer's requirements; measurement errors, especially to include
uncalibrated equipment; cabling losses; and voltage and temperature variations. By no
means should the result from Performance Testing in this section be construed as the
exact value of power level output from the radio, as the value is set and more
accurately measured in the factory. The values obtained in these test procedures
determine a successful installation only.