HP Cell Phone Accessories E6380-90019 用户手册
186
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 100
Ω
to
chassis ground.
•
Float
is a floating input.
•
600 To Hi
provides a 600
Ω
internal load to match an audio
source with an output impedance of 600
Ω
.
The measured level is the potential between the HI and LO center pins.
The shells of both connectors are at chassis ground.
The shells of both connectors are at chassis ground.
For more information see the
, and the
Operating Considerations
Input impedance is switchable between 1 M
Ω
in parallel with 95pF, or
600
Ω
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.
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.
42 V peak (approximately 30 Vrms). Exceeding this value
can cause permanent instrument damage.
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