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S:\agilent\e8285\REFGUIDE\MANUAL\connectr.chp
Chapter 2, Description of Connectors
Connectors
AUDIO IN LOW, HIGH
The audio inputs are used to input audio signals to the AF Analyzer.
• AUDIO IN HI is the main audio signal input connection.
• AUDIO IN 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 100
Ω
to chassis ground
• Float - provides a floating input.
• 600 To Hi - provides a 600 ohm internal load to match an audio source with an out-
put.
The measured level is the potential between the HIGH and LOW center pins. The
shells of both connectors are at chassis ground.
Operating Considerations
•BNC
• Input impedance switchable between
•1 M
Ω
in parallel with 95 pF,
•600
Ω
floating.
• This port is selected as the AF Analyzer's input using the AF Anl In field in the
analog TX TEST screen, DUPLEX TEST screen, and AF ANALYZER screen. This
port is always the AF Analyzer's input when the analog RX TEST screen is displayed.
• 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.
See Also
AF Anl In
field description, on page 155
Audio In Lo
field description, on page 169