HP Cell Phone Accessories 8935 사용자 설명서
70
Chapter 3
Utility Procedures
Voltmeter
Voltmeter
A voltmeter is available in the Test Set, and can measure low level dc or
ac voltages. The input to the voltmeter is controlled by the
ac voltages. The input to the voltmeter is controlled by the
AF Anl In
field in the AF ANALYZER screen.
CAUTION
Do not exceed the rated input to the Test Set for the
DC Level
and
AC Level
measurements.
The connector best suited to making ac Level and dc Level
measurements is the AUDIO IN port.
measurements is the AUDIO IN port.
Measuring AC Level and DC Level
1. Press
Shift
, then
RF Anl
(AF Anl) to go to the AF ANALYZER screen.
2. Select
AF Anl In
and choose
Audio In
.
3. Select
Audio In Lo
and choose
Gnd
. This sets the AUDIO IN LO
port to ground, which allows you to measure voltage at the AUDIO
IN HI port.
IN HI port.
4. Attach a probe (for example a 1:1 oscilloscope probe) to the AUDIO
IN HI connector.
5.
AC Level
is displayed. To change to
DC Level
, select the
AF Freq
measurement and choose
DC Level
from the displayed list of
choices.
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