User`s guide

Agilent E6432A Microwave Synthesizer User’s Guide 2-7

Hardware Front Panel Connectors

10 MHz In

10 MHz In, available from the Hardware Front Panel, accepts a 10 MHz

reference signal +/– 100 Hz, 0 to +10 dBm with a nominal input

impedance of 50 ohms.

To accept a 10 MHz reference signal through this input, external must

be selected. If instead, internal is selected, a 10 MHz reference signal is

provided internally by the synthesizer.

The 10 MHz reference signal that is used, either internal or external,

directly affects the 1200 MHz Reference Out signal because the two

signals are phase-coherent.

Related Topics

Selecting Internal or External 10 MHz Reference Signal

1200 MHz Reference Out

E6432_SetRefSource

10 MHz Out

10 MHz Out, available from the Hardware Front Panel, supplies a

10 MHz reference signal that is phase-coherent with the 10 MHz

reference signal.

This 10 MHz reference signal is produced by a free-running 10 MHz

crystal. There is no specification attached to the crystal. The crystal’s

basic accuracy is about 70 ppm, and inside the synthesizer, its accuracy

is improved to less than 10 ppm. The crystal has a settability of 2 ppm.

At the factory, the crystal is adjusted to be close at room temperature.

By close, it should be within 50 kHz at a 20 GHz center frequency. This

adjustment drifts with crystal aging and changes in ambient

temperature. A service routine will be available to adjust the DAC that

controls the crystal and can be run as needed during periodic

calibrations.