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Connectors
AUDIO IN AUDIO IN
AUDIO IN
Two connectors are used to input audio signals to the AF analyzer:
• HI is the main audio signal input connection.
• LO is used for the audio signal reference. Three choices are available
using the AF ANALYZER screen’s Audio In Lo field:
• Gnd connects the center pin through approximately 100Ω to
chassis ground.
• Float is a floating input.
• 600 To Hi provides a 600Ω internal load to match an audio
source with an output impedance of 600Ω.
The measured level is the potential between the HI and LO center pins.
The shells of both connectors are at chassis ground.
For more information see the "AF Anl In" field on page 123, and the
"Audio In Lo" field on page 127.
Operating Considerations
Input impedance is switchable between 1 MΩ in parallel with 95pF, or
600Ω floating.
This port is selected as the AF analyzer’s input using the AF Anl In
field on the AF ANALYZER screen.
Signals input to the AF analyzer are routed through different filters,
amplifiers, and detectors that affect the displayed measurement.
CAUTION The maximum level between the HI and LO center pins is
42 V peak (approximately 30 Vrms). Exceeding this value
can cause permanent instrument damage.
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