5-20
Service Guide E8364-90001
Theory of Operation
PNA Series Microwave Network Analyzers
Receiver Group Operation
E8362A, E8363A, E8364A
Receiver Group Operation
The receiver group measures and processes the input signals into digital information for
processing and eventual display.
is a simplified block diagram of
the receiver functional group.
In this section the following assemblies are described:
•
A27, A28, A29, and A30 Receiver First Converters (Mixers)
•
A31, A32, A33, and A34 Receiver Modules
•
A6 SPAM Board (Analog Description)
•
•
A27, A28, A29, and A30 Receiver First Converters (Mixers)
The four receiver first converters (mixers) function identically and are completely
interchangeable.
Each first converter receives the RF reference or test signal and mixes it with the 1st LO
signal from the A20 LODA to create the 1st IF signal at a constant 8.333 MHz. This 1st IF
signal is sent to the A31, A32, A33, and A34 receiver modules.
A31, A32, A33, and A34 Receiver Modules
The four receiver modules function identically and are completely interchangeable.
A portion of the 8.333 MHz 1st IF signal is sent to a multiplexer on the A35 receiver
motherboard, the output of which is routed to the A11 phase lock board to complete the
phase lock loop. The 8.333 MHz 1st IF signal is also filtered, amplified, and routed to the
2nd converter.
The 2nd converter divides the 8.333 MHz signal into two paths and mixes each with a
separate LO signal, designated 2nd LO (a) and 2nd LO (b). Both of these 2nd LO signals
are 8.29167 MHz. The 2nd LO (b) signal is phase s90
°
relative to the 2nd LO (a)
signal. These two generated 2nd IF signals are a constant 41.667 kHz. These 2nd IF (a)
and 2nd IF (b) signals are phase shifted
−
45 degrees and +45 degrees, respectively. These
signals are summed together and routed to the A6 signal processing and ADC module
(SPAM) board.
Summary of Contents for E8362A
Page 11: ...Service Guide E8364 90001 1 1 1 Safety and Regulatory Information ...
Page 19: ...Service Guide E8364 90001 2 1 2 General Product Information ...
Page 29: ...Service Guide E8364 90001 3 1 3 Tests and Adjustments ...
Page 79: ...Service Guide E8364 90001 4 1 4 Troubleshooting ...
Page 139: ...Service Guide E8364 90001 5 1 5 Theory of Operation ...
Page 169: ...Service Guide E8364 90001 6 1 6 Replaceable Parts ...
Page 215: ...Service Guide E8364 90001 7 1 7 Repair and Replacement Procedures ...
Page 287: ...Service Guide E8364 90001 A 1 A Error Terms ...
Page 303: ...Service Guide E8364 90001 B 1 B Option Enable Utility ...
Page 309: ...Service Guide E8364 90001 C 1 C Firmware Upgrades ...
Page 313: ...Service Guide E8364 90001 D 1 D Operating System Recovery ...