Radio Shack 20-163 User's Guide download pdf (Page 21)

Zeromatic

While searching, the scanner stops if a transmission triggers the

squelch setting. A narrow-band FM transmission can have a

deviation of +/- 5 KHz, and the actual total bandwidth, including the

tails of the sidebands, can be even greater. However, search intervals

smaller than that can stop your scanner short of the correct (center)

frequency.

The Zeromatic function allows the scanner to nd the correct center

frequency for search banks SR3, SR4, SR5, SR6 and SR7. Zeromatic

automatically tunes the step-increment frequency closest to the

center frequency.

To activate Zeromatic:

1. Press FUNC then 0. “Zeromatic ON.” appears briey, then ZM

appears.

2. To turn Zeromatic off, press FUNC then 0 again. “ZM” changes

to “zm.”

Programming a Search Range

To program the search range of Bank SR7:

1. Repeatedly press SRCH to select SR7.

2. Press PROG then SRCH. “Enter SR7 Search Range Limits”

appears. L blinks for the lower-limit of the range.

3. Use the number keys to enter the lower-limit frequency (including

the decimal point).

4. Press ENT. U appears.

5. Use the number keys to enter the upper-limit frequency

(including the decimal point), then press ENT.

If either entered frequency is incorrect, “Invalid Freq” appears

briey.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 65 66

No comments

Radio Shack 20-163 User's Guide Page 21