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SY87729/39L
Micrel, Inc.
GETTING STARTED
Before powering up the SY87729/39L evaluation board,
you must do the following:
1. Familiarize yourself with the SY87729/39L
evaluation board.
2. Make sure that you are properly grounded.
3. Read and understand this document in its
entirety.
To program the desired output frequency, you will need
a PC running Windows, with the SY87729/39L evaluation
board software installed, and a printer cable attached
between the PC and the SY87729/39L evaluation board.
The software downloads configuration information to the
SY87729/39L device.
If using an external signal source, that source must be
able to generate LVPECL level signals. The inputs are DC
coupled, terminated in 50 ? to V CC –2V.
Evaluation Board
TEST SET-UP
This section discusses how to make two common
measurements with the SY87729/39L evaluation board.
What you will need:
1. The SY87729/39L evaluation board.
2. Either two length-matched one foot SMA cables,
or a digital signal generator such as the
HP8133A.
3. A PC with a parallel port, running Windows.
4. If you are running Windows NT, Windows 2000,
or Windows XP, you will need “Direct-IO”
shareware.
5. A printer cable, one end is a parallel interface,
the other end is a Centronics interface.
6. The SY87729/39L evaluation board software
(download from http://www.micrel.com).
7. A frequency counter.
Frequency
Counter
Power
Supply
Signal
Generator
SY87729/39L
Evaluation
Board
PC Running
Download
Application
Printer
Cable
8. A power supply capable of delivering at least
3.3V at 0.5A.
9. A self-triggering scope or a time interval analyzer
(TIA).
First, we show how to use an external signal generator and
how to measure the frequency of the output. Second, we
show how to use the supplied reference oscillator and how
to measure cycle-to-cycle jitter of the output. Please refer to
Figures 1 and 2.
Figure 1. Test Set-Up with
Signal Generator
SY87729/39L
Evaluation Boad
Patch Cables
Power Supply
PC Running
Download
Application
Time Interval
Analyzer (TIA)
Figure 2. Test Set-Up with
Internal Reference Oscillator
Printer
Cable
M9999-071906
hbwhelp@micrel.com or (408) 955-1690
2
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