Agilent Technologies 8935 Series, Manual

Page: 315 / 343

314 Chapter 10
Block Diagrams
Reference/Regulator Section
Reference/Regulator Section
Reference
All frequencies are derived from a 10 MHz reference which can come
from an external reference or from a 10 MHz crystal oscillator on the
A2A23 Reference assembly. There are two versions of the Reference
assembly. The standard Reference assembly has a temperature
compensated crystal oscillator (TCXO), and the Option 005 (High
Stability Time Base) Reference assembly has an oven controlled crystal
oscillator (OCXO). The A2A23 Reference assembly develops the local
oscillator (LO) and reference signals needed by the assemblies that
make up the RF generator, RF analyzer, spectrum analyzer, and the
A2A33 Measurement assembly.
Power Supply Regulators
Power supply regulators are distributed to all of the modules and
assemblies by he A3A1 Power Supply Regulator assembly through the
motherboard.
Power Supply
The A3A2 Power Supply assembly is a switching type supply. The
power supply generates five different dc supplies. They are:
• +5.5 Vdc
• +13.4 Vdc
•
−
13.4 Vdc
• +43.5 Vdc
•
−
12 Vdc AUX
Power Supply voltages are distributed to all of the modules and
assemblies through the motherboard.