3

dc1959af

DEMO MANUAL DC1959A

Download the FracNWizard setup file at www.linear.com/

FracNWizard.

Run the FracNWizard setup file and follow the instructions

given on the screen. The setup file will verify and/or install

Microsoft .NET and install the FracNWizard. Refer to the

Help menu for software operation.

DC1959A Configuration

1. Connecta100MHzreferencefrequencysourcetoREF+IN

(at J1) and signal analyzers to RF+ and/or RF– (at J5

and/or J4) using the SMA connectors (see Figure 1 and

theTypicalDC1959ARequirementsandCharacteristics

table).

Be sure to terminate any unused RF output with 50Ω,

or poor spurious performance may result.

2. Choose the MUTE jumper setting:

JP1: GND/3.3V – MUTE position. Select GND to mute

the RF output, 3.3V to un-mute.

3. Connect the GND, 3.3V, and 5V banana jacks to a power

supply and apply power (see Figure 1 and the Typical

DC1959A Requirements and Characteristics table).

4. Connect the DC590 to the DC1959A with the provided

ribbon cable.

5. Run the FracNWizard application.

6. In FracNWizard, click File -> Load Settings and point to

theLTC6948-1_100MHz.fracnsetfileincaseofevaluat-

ing the LTC6948-1, for instance, or load the appropriate

file depending on which option of the LTC6948 you are

evaluating.

The red LED on the DC1959A should turn on indicating

that the loop is locked and the output is at 907MHz.

Quick start proceDure

Figure 3. FracNWizard Screenshot