Location Of Controls And Indicators - HP 400F Operating And Service Manual

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Section
IojQ()EL
400F" f'ROI(f PANEL
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400'/fl-B-Q839A
CD
400F Scale: [ndicates magnitude of applied sig­
nal in volts and dBm.
CD
Mechanical Zero Adjust: Provides a mechanical
meter zero adjustment.
([)
INPUT Terminals:
sured to 400F/FL.
RANGE Selector (St): Selects full scale reading
of meter. DBm reading on scale adds algebrai­
of
cally to dB setting
CD
100 KHz LP FILTER Switch (S2): Switches 100
KHz filter either in or out o f circuit.
CD
Line ON Toggle Switch (S3):
power.
0)
LINE Indicator Lamp: Indicates application
of primary IXlwer.
CD
115/230 Volt Slide Switch (S4): Selects 115 or
230 volts ac for line operation.
3-0
MOO£L
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MODEL 400f"L FRONT PANEL
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Connects signal to be mea­
RANGE selector .
Applies primary
Figure 3- 1.

Location of Controls and Indicators

400F REAI't P.II NEL
11
MOOtL 400F"L
REAR PANEL
14
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o
Primary Power Connector:· Line voltage is ap�
plied through this connector.
®
FUSE: Protects instrument against current
overload.
®
AC OUTPUT: Ac amplifier output.
pedance is 6 0 0
@
BATTERY VOLTAGE Terminals: 400F/FL may
be powered by connecting two 35 to 55 volt bat­
teries to these terminals.
®
400 F Scale. Option Ol: The dBm scale is placed
uppermost for greater resolution.
@
400FL Scale: Indicates magnitude of applied sig­
nal
in volts and dBm. DBm scale is linear, and
voltage scales are logarithmic. This arrange­
ment allows better resolution for dB reading.
o
dBm= 1mW in 600
ModeI400F/FL
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Output im­
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01795- 2