User`s guide

Agilent E6432A Microwave Synthesizer User’s Guide 2-15

Hardware Front Panel Connectors

I/Q Inputs

I/Q Inputs, available from the Hardware Front Panel on instruments

with Option UNG, are used to supply the in-phase and quadrature

component (90 degrees) of an I/Q modulation signal.

The input impedance for these I/Q input connectors is 50 ohms.

The I/Q inputs accept input signals that are produced by arbitrary

waveform generators and function generators. This allows the creation

of microwave signals that have complex I/Q modulation impressed on

the RF/microwave signal. The I/Q modulation may be any type of

communication format (such as CDMA, TDMA, GSM, BPSK, QPSK,

and others), phase encoding of a radar pulse, low rate FM signal

simulation, multi-tone signal simulation, or even random noise

simulation. Complex signals can be generated at baseband as I/Q

signals, or with the addition of Option 300, a 300 MHz IF input is

provided that allows complex signals to be modulated onto a 300 MHz

IF input signal.

Instruments with Option UNG have analog I/Q modulation capability

with 40 MHz of bandwidth. Option 300 adds a 300 MHz IF input that

is upconverted to 3.3 GHz. The VXIplug&play driver is used to control

the I/Q and IF driver boards, provide manual control of I/Q gain, offset,

and quadrature, and user calibration of I/Q gain, offset, and

quadrature.

For complete specifications, refer to “Specifications and

Characteristics” on page 6-1.

300 MHz IF In

300 MHz IF In, available from the Hardware Front Panel on

instruments with Option 300, accepts an IF input signal with a

300 MHz center frequency. The IF input signal may have AM, FM,

Pulse, I/Q, or combinations of these modulations impressed on it.

In order to maintain frequency accuracy, the signal being applied to this

input must be phase-locked with the 10 MHz reference signal.