523405
36
Zoom out
Zoom in
Previous page
1/76
Next page
4 DSP
30 CONTENTS TS-590S
Figure 4-10 shows how BC cancels beat signals, as monitored by an FFT analyzer. Notice how
multiple beats are clearly removed by BC.
There are two methods available for beat cancellation: BC1 and BC2. BC1 is tuned to be effective
against weak or continuous beat interference, while BC2 cancels intermittent beats such as a CW
signal. Note that since BC is designed to remove beats, it does not function in CW mode.
BC is a signal process method at the AF stage. Therefore, if there is a beat signal in proximity that is
stronger than the target signal, BC effectively removes the beat interference from the audio output,
but in the event the AGC is activated by the beat signal, the target signal is suppressed when
received.
In such an occasion, the auto notch or manual notch filter that works at the IF stage is more effective.
We explained in the section of RX circuity that TS-590S is equipped with two noise blankers, NB1
and NB2, and that NB2 is a digital noise blanker based on the DSP. In the following section, we will
explain NB2 in detail.
A noise blanker is designed to remove pulse noise at the IF stage to reveal the target signal
suppressed by the AGC that was activated by the pulse noise. In addition to the analog noise
blanker (NB1), the TS-590S is equipped with a newly developed digital noise blanker (NB2) so that
the user can choose the blanker that is more effective for the type of noise encountered and the RX
conditions.
NB2 employs a newly developed envelope tracking method, making it effective against noise that
defies the tracking of the analog noise blanker (NB1).
Unlike the analog noise blanker, the procedure of NB2 is not a simple blanking of pulse noises from
the target signal. NB2 removes pulse noises by tracking the RX signal level to automatically detect
pulses and comparing the level of the pulses and of the target signal excluding the pulses to
attenuate the pulse parts appropriately. Hence, even a long pulse can be processed without
seriously degrading the target signal.
Figure 4-11 shows the time waveform of a signal containing pulse noises and a CW signal while NB2
is inactive, and Figure 4-12 shows the time waveform of the same signal while NB2 is active.
4.6.2 Noise Blanker NB2 (IF Processing)
36


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Kenwood TS-590S at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Kenwood TS-590S in the language / languages: English as an attachment in your email.

The manual is 5,6 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Kenwood TS-590S

Kenwood TS-590S User Manual - German - 92 pages

Kenwood TS-590S User Manual - Dutch - 92 pages

Kenwood TS-590S User Manual - French - 92 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info