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参数资料
| 型号： | FN3000-810-830 |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, DMA37 |
| 文件页数： | 3/12页 |
| 文件大小： | 702K |
| 代理商： | FN3000-810-830 |
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201 McLean Blvd, Paterson, NJ 07504 Tel: (973) 881-8800 Fax: (973) 881-8361
E-mail: sales@synergymwave.com Web Site: http://www.synergymwave.com
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Question: What if my frequency
standard operates above those three
industry-standard frequencies?
Answer: Assume your frequency
standard operates at 80 MHz. The
easiest solution would be to divide its
output by 8 and use the resulting 10-
MHz signal as the reference input to
the evaluation board.
Question: What if I don’t want to
use Synergy’s evaluation board?
Answer: The phase-noise perfor-
mance with your 80-MHz standard
will be worse than that achievable
with the evaluation board’s 120-MHz
reference standard. The deteriora-
tion will be 20 log (120/80), or 3.52
dB. This clearly shows the need to
use as high a reference frequency
as possible.
Question: Beside phase-noise perfor-
mance, how will the absence of the evalua-
tion board affect the operation of the
fractional synthesizer?
Answer: The software provided with the
fractional synthesizer has enough program-
ming capabilities to adjust for your choice of
reference frequency, so the synthesizer will
operate properly. However, its phase-noise
performance will be degraded as described
above. The evaluation board also includes
voltage-regulator circuitry that supplies
exceptionally clean, low-noise dc to the
synthesizer and reference standard. Oper-
ating the synthesizer from a noisier power
source will further compromise its spectral
purity.
Question: What is the best solution from a
user point of view?
Answer: Since we supply the circuit
diagram of the evaluation board, we recom-
mend that users build their own equivalent
of the evaluation board as a master for
supply-voltage generation as well as fre-
quency generation, taking care their board
layout does not compromise the electrical
performance of the circuitry. Such a board
can then be used to drive several synthe-
sizers at the same time.
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