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Ref
10 dBm
Att
35 dB
*
*
1 AP
CLRWR
A
RBW 3 kHz
VBW 10 kHz
SWT 28 s
Cent er
125 MHz
Spa n
250 MH z
25 M
*
Hz/
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
10
1
Marke r 1 [T1 ]
4.
56 d Bm
12 5.00 00000 00 M Hz
DAC5686 EVM Operational Procedure
A tone at a frequency of CLK2/4 should now be present at connectors J5 (IOUTA) and J19 (IOUTB). In
the case of CLK2 = 500 MHz, the output spectrum should be similar to
, with a tone at 125
MHz.
This tone is being generated by the DAC5686 Fdac/4 Coarse Mixer as with no input data provided to
connectors J13 and J14, the Channel A and B data bus inputs will all be zeros, or a full scale negative
value in the default offset binary format.
Figure 3. Spectrum with CLK2 = 500 MHz, X4 Interpolation, Single Sideband Mode, NCO Off
12
DAC5686 EVM
SLWU006E – December 2004 – Revised March 2007
