Theory of Operation, Operating Instructions and Maintenance
Sections
Although the physical configuration of these models is different, the provi-
sions in these sections of the Model 43 Instruction Book are fully applicable.
The Model 4527 is electrically identical to the Model 43 in every way except
for having an RF sampler port. The RF sampler port provides a low level
signal or sample of the energy being transmitted through the line section of
the wattmeter. This signal is available at a Female BNC connector located
on the right side of the panel, labeled RF SAMPLE.
Series 4520 Replacement Parts List
Item Qty.
Description
Part Number
1
1
Mounting panel
(Comprises: M=meter, E=element socket,
S=switch
Model 4521 (1M, 1E)
Model 4522 (1M, 2E, 1S)
Model 4523 (1M, 1E)
Model 4525 (1M, 1E)
Model 4526 (2M, 2E)
Model 4527 (2M, 2E)
4521-002
4522-006
4523-002
4525-002
4526-004
4527-005
2
1
Line section assembly
Model 4521/23/25
Model 4522/26
Model 4527
4230-018
4522-002
4527-002
3
2
RF connectors
See Model 43
Replacement
parts list
Maintenance
43
Summary of Contents for THRULINE 43 Series
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