Agilent Technologies 8935 Series Specifikace stáhnout pdf (Strana 315)

100

101

314 Chapter 10

Block Diagrams

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.

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