Service manual

200-0176 Antenna: How is it mounted and does it come with cable?
200-0188 Adapter: What replaces this adapter?
200-0282 Headphones: How much noise do these block out?
200-0282 Headphones: What is the sensitivity (dB rating)?
200-0284 Headphones: How much noise do these block out and what is it designed for?
200-0284 Headphones: What are the specifications on these headphones?
GENERAL SCANNER INFORMATION
Product: Programming
Question: Do you have scanner frequency lists available?
Answer: The only source we have for scanner frequencies is the "Police Call" directory for your area, which should be available through your
local RadioShack store and can also be ordered on-line or by calling 800-843-7422. The catalog numbers for the "Police Call" books are as
follows:
620-2518 - CT, ME, MA, NH, NY, RI, VT
620-2519 - DE, MD, NJ, PA
620-2520 - IL, IN, KY, MI, OH, WI
620-2521 - IA, KS, MN, MO, NE, ND, SD, AZ, CO, ID, MT, NM, NV, WY, UT
620-2522 - DC, FL, GA, NC, SC, VA, WV, PR
620-2523 - AL, AR, LA, MS, OK, TN, TX
620-2524 - CA, OR, WA
The Police Call Directories are also available as a single Compact Disc (
Cat. No. 620-2502).
These can be purchased on-line by clicking on the number link to go to the catalog page.
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Product: Programming
Question: How do I enter a 7-digit frequency when the scanner only takes 6 digits?
Answer: You will need to round off the last digit.
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Product: Terminology
Question: What is meant by the "step-rate" of a scanner?
Answer: This is the function of the step rate of the scanner:
856.2675 less the beginning frequency of the band, which, in this case, is 851.0000 MHz equals 5.2675 divided by the step rate, which is 0.0125
(12.5 kHz) equals 421.4. Since this number is not an even full number, the scanner will drop back. To find out how much - multiply the full
number portion (421) times 0.0125 which equals 5.2625 plus the beginning frequency in the band, 851.0000 equals 856.2625. Use either that
number or that number plus 0.0125 which equals 856.2750.
Usually, one of the two calculated values will be close enough to pick up the desired channel.
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Product: Terminology
Question: How do I tell if my scanner uses dual or triple conversion?
Answer: Look at the number of
IF Frequencies. Dual-conversion scanners have only 2 IF frequencies; triple-conversion scanners have 3 IF
frequencies.
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