GatesAir Inc. CZF Manual De Usuario

APEX

™

 Exciter Incorporating FLO

™

 Technologyr

DC Power Distribution

Theory of Operation

26

04s40

0.fm

03/08/07

888-2604-001

Page: 4-17

WARNING: Disconnect primary power prior to servicing.

• +15 Volt Float leaves UDC interface board at J5 pin 2, the return is J5 pin 1.

The down converter board receives its dc voltages (+/- 15 Vdc and +8 Vdc) from the UDC
interface board via connector J8. The down converter board supplies are listed below.

• +15 Vdc: Input power from UDC interface board via connector J8 pin 1

• -15 Vdc: Input power from UDC interface board via connector J8 pin 3

• 8 Vdc: Input power from UDC interface board via connector J8 pin 5

• An on board regulator produces -5 Vdc from the -15 Vdc supply

• An on board regulator produces +5 Vdc from the +8 Vdc supply.

The following ia a list of entries on the down converter board status screen.

• +15 Vdc: Input power

• -15 Vdc: Input power

• +8 Vdc: Input power.

The PLL (phase lock loop) board receives its dc voltages (+/- 15 Vdc and +8 Vdc) from the
UDC interface board via connector J1, as listed below.

• +15 Vdc: Input power from UDC interface board via connector J1 pin 1

• -15 Vdc: Input power from UDC interface board via connector J1 pin 3

• 8 Vdc: Input power from UDC interface board via connector J1 pin 5

Several on board regulators are used to achieve low noise and excellent isolation between
the PLL board digital input/output circuits, 10 MHz reference oscillator, 128.9 MHz 1st
local oscillator (LO), and the 2ns local oscillator. This board contains seven on board +5
Vdc regulators, one +12 Vdc regulator, six +3.3 Vdc regulators, one +2.5 Vdc regulator,
and one +1.8Vdc regulator.

The following ia a list of entries on the PLL board status screen.

• +15 Vdc: Input power from UDC interface board via connector J1 pin 1.

• -15 Vdc: Input power from UDC interface board via connector J1pin 3.

• 8 Vdc: Input power from UDC interface board via connector J1pin 5.