5-1
CHAPTER 5
SPECIAL-APPLICATION TEST EQUIPMENT
LEARNING OBJECTIVES
Upon completing this chapter, you should be able to:
1. Explain the theory of operation of two types of power meters.
2. Describe the purpose of the controls and indicators found on power meters.
3. Describe the proper procedure for taking power measurements for incident and reflected energy.
4. Describe the uses and purposes of the controls and indicators found on the signal generator.
5. Explain the theory of operation of a typical frequency counter.
6. Describe the uses and purposes of the controls and indicators found on the frequency counter.
7. Explain the uses and purposes of the controls and indicators found on the Huntron Tracker 2000.
8. Describe the proper procedures for troubleshooting with a logic probe.
9. Describe the proper procedures for troubleshooting using the Huntron Tracker 2000.
INTRODUCTION
In chapters 3 and 4, you studied the more common pieces of test equipment. As a technician, you
will routinely use this test equipment to troubleshoot and perform maintenance on electronic equipment.
However, the equipments you will study in this chapter may or may not be found in your shop. This is
because these equipments have specific or specialized uses. Unless your rating is involved with the
equipment with which they are used, you may not have reason to use them. They are presented here so
that you will be familiar with their overall function should the need arise. The equipments you will study
in this chapter are power meters, signal generators, frequency counters, and integrated circuit-testing
devices.
POWER METERS
As a technician, you will use a POWER METER to measure power. There are various types of
power meters, some of which are called WATTMETERS. Figure 5-1 shows the AN/URM-120 wattmeter,
which is one type of power meter commonly used in the Navy. This particular power meter measures
power directly; that is, you connect it directly between the transmitter output (rf source) and the load,
most likely an antenna.
