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about PLL acquisition range and tracking range...

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super

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acquisition range

Dear all:
In satellite PLL,
what is difference between acquisition Frequency range and
tracking Frequency range?

Thanks.
 

biff44

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pll tracking range and acquisition range

tracking range is wider than acquisition range, usually.
 

    super

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LvW

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site:www.edaboard.com pll

super said:
Dear all:
In satellite PLL,
what is difference between acquisition Frequency range and
tracking Frequency range?
Thanks.

As indicated by the words:
- tracking range is the frequency range which can be "tracked" by the locked PLL without loosing lock;
- acqu. range is the range in which the PLL can acquire lock (if it is out of lock),

(as BIF44 said: the first is much larger)
 

    super

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super

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tracking and lock range of the pll

1. It means tracking range is a lock-in range and
acquisition range is a Hold-in(capture) range ?

2. if I set frequency from lowest frequency
to highest frequency it will lock , is it a lock-in
range ?

3 How to set and measure capture range?

4. Why tracking range is large than acquisition range ?

5. What factor effect these two terms?
 

LvW

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tracking frequency of pll

super said:
1. It means tracking range is a lock-in range and
acquisition range is a Hold-in(capture) range ?

2. if I set frequency from lowest frequency
to highest frequency it will lock , is it a lock-in
range ?

3 How to set and measure capture range?

4. Why tracking range is large than acquisition range ?

5. What factor effect these two terms?

One should be careful with wording as different names are used frequently.
For my opinion the following is true:
1.) Tracking range identical to hold range (loop is and remains in-lock) and
acquisition range is identical to pull-in range (loop is unlocked, lock-in possible within pull-in time)
2.) This is the pull-in range. (Lock-in range means: Quick Lock-in within one beat cycle)

Answers to 3)...5) require much more detailed explanations/formulas. Try to find and read a good book.
 

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super

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acquire pll track

LvW, could you kindly recommand some PLL textbook ?
i have one roland E. Best "Phase-Locked Loops",
 

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