
Section
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ModeI400F/FL
IojQ()EL
400F" f'ROI(f PANEL
MOO£L
400F REAI't P.II NEL
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MODEL 400f"L FRONT PANEL
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400'/fl-B-Q839A
CD
400F Scale: [ndicates magnitude of applied sig
nal in volts and dBm.
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Mechanical Zero Adjust: Provides a mechanical
meter zero adjustment.
([)
INPUT Terminals: Connects signal to be mea
sured to 400F/FL.
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RANGE Selector (St): Selects full scale reading
of meter. DBm reading on scale adds algebrai
cally to dB setting
of
RANGE selector .
100 KHz LP FILTER Switch (S2): Switches 100
KHz filter either in or out of circuit.
Line ON Toggle Switch (S3): Applies primary
power.
LINE Indicator Lamp: Indicates application
of primary IXlwer.
115/230 Volt Slide Switch (S4): Selects 115 or
230 volts ac for line operation.
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MOOtL 400F"L
REAR PANEL
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Primary Power Connector:· Line voltage is ap�
plied through this connector.
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FUSE: Protects instrument against current
overload.
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AC OUTPUT: Ac amplifier output. Output im
pedance is 600
n.
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BATTERY VOLTAGE Terminals: 400F/FL may
be powered by connecting two 35 to 55 volt bat
teries to these terminals.
400F 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
n.
Figure 3- 1. Location of Controls and Indicators
3-0
01795- 2
Содержание 400F
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