Manual RadioShack PRO-71 (page 37 of 44) (English)

570017

Zoom out

Zoom in

1/44

AVOIDING IMAGE FREQUENCIES

You might discover one of your regular stations on another frequency

that is not listed. It might be what is known as an image frequency. For

example, you might find a service that regularly uses a frequency of

431.875 also on 474.675.

To see if it is an image, do a little math.

Note the new frequency. 474.675

Double the intermediate frequency of 21.4 MHz

(42.8)

and subtract it from the new frequency. –42.8

If the answer is the regular frequency, 431.875

then you have tuned to an image.

Occasionally you might get interference on a weak or distant channel

from a strong broadcast 42.8 MHz below the tuned frequency. This is

rare, and the image signal is usually cleared whenever there is a

broadcast on the actual frequency.

FREQUENCY CONVERSION

The tuning location of a station can be expressed in frequency (kHz or

MHz) or in wavelength (meters). The following information can help

you make the necessary conversions.

1 MHz (million) = 1,000 kHz (thousand)

To convert MHz to kHz, multiply by 1,000:

9.62 MHz

1000 = 9620 kHz

To convert from kHz to MHz, divide by 1,000.

2780 kHz

1000 = 2.780 MHz

To convert MHz to meters, divide 300 by the number of megahertz.

300

7.1 MHz = 42.25 meters

20-311a.fm Page 37 Friday, February 12, 1999 4:51 PM

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:

Forumrules

To achieve meaningful questions, we apply the following rules:

First, read the manual;
Check if your question has been asked previously;
Try to ask your question as clearly as possible;
Did you already try to solve the problem? Please mention this;
Is your problem solved by a visitor then let him/her know in this forum;
To give a response to a question or answer, do not use this form but click on the button 'reply to this question';
Your question will be posted here and emailed to our subscribers. Therefore, avoid filling in personal details.

new questions and answers
new manuals

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 RadioShack PRO-71 in the language / languages: English as an attachment in your email.

The manual is 1,09 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.

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

RadioShack PRO-71 Manual

Product: