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USE OF EXTERNAL PREAMPLIFIERS PREAMPLIFIER OPERATIONS
7-4 ME 7840A OMM
AUT
POWER
METER
OPTIONAL
SPECTRUM
ANALYZER
SYSTEM
CONTROLLER
(PC)
B2RF1 B1A1 A2
POWER
SUPPLY
COMBINER
RF2
-30dB
-30dB
N
N
NK
K
K
KKN
N
N
KKKN
N
DIRECT RECEIVER
ACCESS
SCORPION
Test Set
(Partially Shown)
EXT I/O
SOURCE 2 SOURCE 1
STEP
ATTENUATORS
70dB, 10dB/step
RF3
FORWAR
D
REVERSE
RECEIVERS
CURRENT PROBE
TERMINATIONS
ANALOG IN
GPIB
GPIB
CONTROL
LINES
EXTERNAL
HYBRID COUPLER/
COMBINER
PREAMPLIFIERS
N
NK
K
K
ATTENUATORS
TRANSFER
SWITCH
Figure 7-2. MS4782A with External Combiner