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3 Hardware Components Master Clock System

50 System Reference, January 2001

In each clock domain, you can select a master clock source

from the internal master clock generator on the clock

board or AMC (Alternate Master Clock generator)

described in the next paragraph.

Alternate Master Clock The AMC (Alternate Master Clock generator) is an

optional signal generator used as a master clock gener-

ator. It is installed in the support rack and is connected to

the external clock input of the clock boards in the

testhead.

The AMC has better performance for the following charac-

teristics:

•Phase Noise

•Spurious

• Intermodulation

Therefore, the AMC generates a master clock with lower

jitter, and enables the tester hardware to operate with

more accurate timing for high speed applications using the

Dual High Speed Sampler (undersampling) and High

Speed AWG.

If you perform precision mixed-signal testing such as

these, AMCs should be used for both the digital and analog

clock domains. However, note that the AMC’s frequency

switching speed is slower than for the internal master

clock generator.

The setting range and resolution of the AMC are as

follows:

For more technical information of the AMC, contact an

Agilent Technologies sales and service office.

Range: 2 - 5 ns (200 MHz -

500 MHz)

Max. Resolution: Approx. 10 digits

(0.01 Hz)

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AWG G3 PAD FOR PS3 Dokumentacja Strona 50