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dc1954af

DEMO MANUAL DC1954A

Quick start proceDure

Download the LTC6954_GUI setup file at:

RuntheLTC6954_GUIsetupfileandfollowtheinstructions

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

Microsoft .NET and install the LTC6954_GUI.

DC1954A Configuration

1. Connect the GND and V+ 3.15V-3.45V, turrets to a

power supply and apply power (see Figure 1 and the

Typical DC1954A Requirements and Characteristics

table).

2. Connect the DC590 to the DC1954A with the provided

ribbon cable.

3. Run the LTC6954_GUI application.

4. From the LTC6954_GUI, click File -> Load Settings

and point to the LTC6954.6954set file.

5. From the LTC6954_GUI, select the Read All button.

This will update the GUI to display the correct part

number and associated output types.

6. Connect a low phase-noise (or jitter) single-ended or

differential signal to IN+ (J8) and/or IN- (J9). Refer to

the LTC6954 data sheet for acceptable input frequen-

cies and amplitudes.

7. From the LTC6954_GUI, update Fin to the frequency

of the input signal in step 6. This will update the

LTC6954_GUI with the correct output frequencies.

8. Refer to the Typical DC1954A Requirements and

Characteristics table for desired OUTxSEL level. Set

JP1, JP2 and JP3 accordingly.

9. Connect desired output (OUT0, OUT1, OUT2) to a test

instrument or other demo board to evaluate perfor-

mance. [The LVDS/CMOS outputs are DC-coupled,

please make sure the levels do not exceed the test

equipment input levels].

10. To synchronize outputs provide a 1ms or greater

high pulse to the SYNC SMA to take advantage of the

EZSync function.

Be sure to power down or terminate any unused RF output

with 50Ω, or poor spurious performance may result.

Figure 3. LTC6954_GUI Screenshot