Agilent Technologies PSG Series Service Manual page 80

Reference / Synthesis Loop
A9 YIG Driver Microwave / RF Path
FM Coil
FM
FM Driver
3.2 to 10 GHz
A28 YIG
Oscillator
Main Coil
Main Driver
YO Phase Lock 3.2 to 10 GHz
3.2 to 10 GHz
A6 Frac-N (Fine Tune)
Low-Band
FM Scaling Divider and
Filter
VCO
500-1000 MHz
A5 Sampler (Coarse Tune)
Sampler/
YO Loop
YO Phase
Phase-Locked
Correction
Loop
Reference (Standard)
1 GHz
A7 Reference
10 MHz
Reference (Option UNJ)
1 GHz
10 MHz
A7 Reference
A32 10 MHz
Crystal Oscillator
A18 CPU
A19 Power Supply
A31 Motherboard
S1
se916a
3.2 to 20 GHz
A29 20 GHz Doubler A30 Modulator Filter
250 kHz
3.2 GHz
ALC Loop
250 kHz
to 3.2 GHz A23 Low-Band
A8 Output
Coupler / Detector
250 kHz
to
3.2 GHz
High-Band
Low-Band
A11 Pulse/Analog
Pulse Pulse
Modulation
Generator
Rear Panel
10 MHz Out
10 MHz In
10 MHz EFC
.25-3.2 GHz A21 Rear Panel
Carrier Interface
Source Module
Interface
GPIB
LAN
Auxiliary Interface
Source Settled
Trigger In
Trigger Out
Sweep Out
A26 Microwave Interface Deck
250 kHz
to
20 GHz
E8244A/E8254A
10 GHz Models Only 250 kHz
to to
20 GHz 40 GHz
A27 40 GHz
Doubler
to
High-Band ALC
Detected High Band
A10 ALC
Detected Low Band
Low-Band ALC
AM
Front Panel
Ext 1 Input
Ext 2 Input
LF Output
ALC Input
Pulse/Trigger Gate Input
Pulse Video Out
Pulse Sync Out
120 Vac
A22 Line Module or
240 Vac
Overall Block Diagram for the Agilent E8241A/E8244A/E8251A/E8254A Service Guide E8251-90030
A24 Coupler RF Output
250 kHz to 20 GHz
or
AT1
250 kHz to 40 GHz
A25 Detector
115 dB Attenuator
(Option 1E1)
A26
A27 A25
se932_1a
A18 A11 A10
A32 A19
A23 AT1
A24
A8
A9 A7 A6 A5