Manual RadioShack Realistic PRO-2050 (page 33 of 56) (English)

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To remove a scan list from active

scanning, use the number keys to en-

ter the scan list’s number. The scan

list indicator turns off, and the IDs in

that list are not scanned.

Note: You cannot remove all the scan

lists. One scan list must always be ac-

tive.

To restore a scan list to active scan-

ning, use the number keys to enter its

number again.

Press

to return to the scan-

ner’s previous function.

SCANNING TYPE I AND

HYBRID TRUNKED

SYSTEMS

Your PRO-2050 is set to scan Type II

user IDs by default. When you scan

trunked frequencies, each Type II user

ID you see appears as an even num-

ber without a dash (such as 2160).

Your PRO-2050 can also scan Type I

trunked systems. Each Type I ID ap-

pears as a three- or four-digit number,

followed by a hyphen, followed by a

one- or two-digit number (such as

200-14).

If you notice a mix of odd- and even-

user IDs (such as 6477, 2160, 6481,

6144, and 1167), then you are proba-

bly monitoring either a Type I or hybrid

(a combination of Type I and Type 2

user IDs) system. (See “Types of

Trunking Systems” on Page 25.)

You might also notice that you are

missing responses when you hold on

an active ID. Unlike Type II systems,

Type I and hybrid systems require a

fleet map that sets specific fleet-sub-

fleet parameters. It is easy to select a

fleet map to scan; what is not always

easy is selecting or programming a

map that is being used in your particu-

lar area.

When a Type I system is designed,

the address information for all its user

IDs is divided into 8 equal-size blocks,

numbered 0–7, and each block is as-

signed a size code. When you set up

your scanner to track a Type I system,

you must choose a size code for each

block. When you have chosen a size

code for all 8 blocks, you will have du-

plicated the

fleet map

for the system

you are tracking. If you have chosen

correctly, you will be able to track

transmissions in that system.

Each size code defines the number of

fleets, subfleets, and IDs each block

has. For example, you can see in the

following table that a size code of S4

has one fleet, which is divided into 16

separate subfleets, and it has a total

of 512 individual IDs.

Size Fleets Sub-

fleets

IDs Block

Used

S0 Reserved block for Type II IDs

S1 128 4 16 1

20-430.fm Page 33 Wednesday, August 4, 1999 1:29 PM

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RadioShack Realistic PRO-2050 Manual

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