Anritsu 37 D Series, Maintenance Manual

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3-8 37XXXD MM
SYSTEM OVERVIEW THEORY OF OPERATION
Notes:
Source
Quadrupler
Module
(SQM)
Switched Filter
with Amps
Down
Converter
Analog to Digital Converter
A5 PCB
Sampler/Buffer Amp
(Receiver Down Conversion
Module)
Source
Doubler
Module
(SDM)
Source
Quadrupler
Module
(SQM)
Port 2 MUX
Coupler
(Reverse)
Transfer Switch
(Test A/ Test B
Control)
37 GHz
Hi Pass Filter
37 GHz
Hi Pass Filter
Port 1 Step
Attenuator
(2)
Port 2 Bias
Tee
(2)
Port 1 MUX
Coupler
(Forward)
A6 PCB
Test B IF
SPDT Switch
J4
J5
Test B
(1)
Test A (1)
Test B (1)
Test A
(1)
A3 PCB
Test A IF
Power
Amp
Second
LO
(A2
PCB)
First LO
(A1 PCB)
Test B 40 MHz to 38 GHz (1)
Test A 40 MHz to 38 GHz (1)
Front
Panel
RF
Cable
(3)
Test B 40 MHz to 65 GHz (1)
Test A 40 MHz to 65 GHz (1)
J3
2.5 MHz CW
J2 J2
J2
J1
J4 J2
J3
J2
ALC from
A21A2 PCB
J1
J3
J2
40 MHz to
2 GHz
6.3 to
8.3 GHz
40 MHz to
19 GHz
9.5 to
16.25 GHz
40 MHz to 38 GHz
J3
Port 2
Coupler
DUT
Port 1
Coupler
Port 1
Bias Tee
(2)
J4
J4 J5 J2 J3
J4
J3
J2 J7
DC Voltages
2.5 MHz CW
Port 2 Step Attenuator
(2)
Digital Data to
Processor
J1
Test B Test A
16.8 GHz
Low Pass
Filter
15 dB
pad
(1) When using S21, S12, or Non-Ratio (diagnostic) displays. Test A = b1, Test B = b2.
(2) Not present on 372XXD models.
YIG
Oscillator
2 to 20 GHz
Control from
A21A1 PCB
Control from A21A1
Control from A8 PCB
Control from A8
Control from
A8 PCB
Control from
A8 PCB
Control from
A8 PCB
10 MHz from
A7 PCB
10 MHz from
A7 PCB
J1 J1
(3) Option 15 units only.
Front
Panel
RF
Cable
(3)
3 dB
Pad
Front
Panel
RF
Cable
(3)
Front Panel RF Cable
(3)
38 to 65 GHz
38 to 65 GHz
Test A Test B
A21A1 PCB
A21A2 PCB
ALC to Port 2 MUX
Digital and
Analog Control
Figure 3-4.
Test Signal Paths for 50 GHz and 65 GHz Models