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Measurement Guideline 2
45
Measurement Guideline 2
Cabling and Adapter Considerations
For most FM, AM, and SSB measurements, only the standard Test Set
with correct interconnecting cables and adapters are required.
Output Power
If output power is greater than 60W (continuous), an external
attenuator is also required. Any other additional equipment or Test Set
options that are required to perform the measurement are listed in the
procedure.
Cabling Test Loads
When measuring audio output, a Test Load with a resistance value
dependent on the Receiver’s output impedance (normally 8 Ω) is
required. In most cases, a non-inductive resistor with a power rating
sufficient for the Receiver’s rated output power and resistance that
matches the speaker impedance can be used. Typically, the test load is
connected at the Test Set AUDIO IN connector using a BNC to dual
banana adapter.
Spectrum Analyzer
For Spectrum Analyzer measurements, the Spectrum Analyzer/
Tracking Generator option (002) must be installed in the Test Set.
Oscilloscope
For Oscilloscope Measurements, Hewlett-Packard’s HP 104XX series
passive Oscilloscope probes can be used to input signals to the
Oscilloscope via the front panel Audio Input or rear panel
MODULATION INPUT connectors.