20-520.fm Page 1 Wednesday, August 4, 1999 3:06 PM Owner’s Manual Cat. No. 20-520 PRO-90 300-Channel TrunkTracker Scanner Please read before using this equipment.
0-520.fm Page 2 Wednesday, August 4, 1999 3:06 PM FEATURES Your new RadioShack PRO-90 300-Channel TrunkTracker Scanner is the first of a new generation of scanners designed to track Motorola Type I and Type II (such as Smartnet, and Privacy Plus) and hybrid analog trunking systems, which are extensively used in many 800 MHz communication systems.
20-520.fm Page 3 Wednesday, August 4, 1999 3:06 PM Ten Channel-Storage Banks — let you store 30 channels in each bank to group channels so you can more easily identify calls. Five Scan Lists — let you store up to 50 IDs in each tracking bank (up to a total of 500). Two-Second Scan Delay — delays scanning for about 2 seconds before moving to another channel, so you can hear more replies that are made on the same channel.
20-520.fm Page 4 Wednesday, August 4, 1999 3:06 PM Flexible Antenna with BNC Connector — provides excellent reception and is designed to help prevent antenna breakage. Or, you can connect an external antenna. Memory Backup — keeps the frequencies stored in memory for an extended time. Three Power Options — let you power the scanner using the built-in rechargeable battery pack, external AC power using the supplied AC adapter/charger, or DC power using an optional DC cigarette-lighter power cable.
20-520.fm Page 5 Wednesday, August 4, 1999 3:06 PM We recommend you record your scanner’s serial number here. The number is on the bottom panel. Serial Number: ___________________________ FCC NOTICE Your scanner might cause radio or TV interference even when it is operating properly. To determine whether your scanner is causing the interference, turn off your scanner. If the interference goes away, your scanner is causing it.
20-520.fm Page 6 Wednesday, August 4, 1999 3:06 PM CONTENTS Preparation ................................................................ 8 Power Sources ..................................................... 8 Using the Rechargeable Battery Pack .......... 8 Using Standard AC Power ............................ 9 Using Vehicle Battery Power ....................... 10 Connecting the Antenna ..................................... 11 Connecting an Optional Antenna ................
20-520.fm Page 7 Wednesday, August 4, 1999 3:06 PM Trunk Tracking ......................................................... 32 Types of Trunked Systems ................................. 32 Setting the Scanner to the Trunk Tracking Mode 33 Setting Squelch for the Trunk Tracking Mode .... 34 Programming Trunked Frequencies ................... 34 Scanning a Trunked Bank .................................. 36 Monitoring an Active ID ............................... 37 Locking Out IDs ............................
20-520.fm Page 8 Wednesday, August 4, 1999 3:06 PM PREPARATION POWER SOURCES You can power your scanner from any of three sources: • Built-in rechargeable battery pack • Standard AC power using the supplied AC adapter/ charger • Vehicle battery power using an optional DC cigarette-lighter power cable Using the Rechargeable Battery Pack You must charge your scanner’s built-in rechargeable battery pack before you can use it to power the scanner.
20-520.fm Page 9 Wednesday, August 4, 1999 3:06 PM 1. Press down on the battery compartment cover and slide the cover in the direction of the arrow to remove it. 2. Disconnect the battery pack’s connector from the scanner’s connector. Then remove the battery pack from the battery compartment. 3. Attach the new battery pack's connector to the battery socket inside the battery compartment. Then put the battery pack into the compartment. 4. Replace the cover.
20-520.fm Page 10 Wednesday, August 4, 1999 3:06 PM EXT. PWR Jack Warning: Do not use the AC adapter/charger's polarized plug with an extension cord, receptacle, or other outlet unless the blades can be fully inserted to prevent blade exposure. Caution: Use only the supplied AC adapter/charger. It is specifically designed for this scanner. Using Vehicle Battery Power To power the scanner from your vehicle's cigarette-lighter socket, you need a DC cigarette-lighter power cable, such as Cat. No. 270-031.
20-520.fm Page 11 Wednesday, August 4, 1999 3:06 PM When you finish using the DC cigarette-lighter power cable, disconnect it from the cigarette-lighter socket, then disconnect it from your scanner. Note: If the scanner does not operate properly when you connect a DC cigarette-lighter power cable, unplug the power cable from the cigarette-lighter socket and clean the socket to remove ashes and other debris.
20-520.fm Page 12 Wednesday, August 4, 1999 3:06 PM Connecting an Optional Antenna The scanner’s antenna jack makes it easy to use the scanner with a variety of antennas. Instead of the supplied antenna, you can attach a different one, such as an external mobile antenna or outdoor base station antenna. Your local RadioShack store sells a variety of antennas. Always use 50-ohm coaxial cable, such as RG-58 or RG-8, to connect an outdoor antenna.
20-520.fm Page 13 Wednesday, August 4, 1999 3:06 PM CONNECTING AN EARPHONE/ HEADPHONES For private listening, you can plug an earphone or headphones with a 1/8-inch mini-plug (such as Cat. No. 33175 or 20-210) into the jack on top of your scanner. This automatically disconnects the internal speaker. Listening Safely To protect your hearing, follow these guidelines when you use an earphone or headphones. • Do not listen at extremely high volume levels.
20-520.fm Page 14 Wednesday, August 4, 1999 3:06 PM CONNECTING AN EXTENSION SPEAKER In a noisy area, an extension speaker (such as Cat. No. 21-549), positioned in the right place, might provide more comfortable listening. Plug the speaker cable’s 1/ 8inch mini-plug into your scanner’s jack. ATTACHING THE BELT CLIP You can attach the supplied belt clip to make your scanner easier to carry when you are on the go. Use a Phillips screwdriver and the two supplied screws to attach the belt clip to the scanner.
20-520.fm Page 15 Wednesday, August 4, 1999 3:06 PM UNDERSTANDING YOUR SCANNER Once you understand a few simple terms we use in this manual and familiarize yourself with your scanner’s features, you can put the scanner to work for you. You simply find the communications you want to receive, then set the scanner to scan them. A frequency is the tuning location of a station (expressed in kHz or MHz). To find active frequencies, you can use the search function.
20-520.fm Page 16 Wednesday, August 4, 1999 3:06 PM SCAN — scans through the stored channels. — stops scanning and lets you directly enter a channel number or frequency. MANUAL — switches between conventional and trunk tracking modes. TRUNK SVC (service) — selects a service bank. — turns on and off the Hypersearch mode; sets and turns on and off the priority feature. SPEED/PRI (speed/priority) LOCK/ — locks the keypad to prevent accidental program changes.
20-520.fm Page 17 Wednesday, August 4, 1999 3:06 PM A LOOK AT THE DISPLAY The display has indicators that show the scanner’s current operating status. A good look at the display will help you understand how your scanner operates. BANK — appears with numbers (1–10). Numbers with a bar under them show which channel-storage banks are turned on for scanning. TRUNK — appears when the scanner is in the trunk tracking mode.
20-520.fm Page 18 Wednesday, August 4, 1999 3:06 PM SRCH — lights steadily during a limit search and ID search, and blinks while HyperSearch is active and when you monitor IDs (see “Monitoring IDs” on Page 39). PRI — appears when the priority feature is turned on. HOLD — appears when you manually select a channel or when the scanner is in the hold mode during a search or service bank scan or during a limit search. DLY — appears when you program a delay.
20-520.fm Page 19 Wednesday, August 4, 1999 3:06 PM UNDERSTANDING BANKS Channel Storage Banks To make it easier to identify and select the channels you want to listen to, channels are divided into 10 banks of 30 channels each. Use each channel-storage bank to group frequencies, such as the police department, fire department, ambulance services, or aircraft (see “Guide to the Action Bands” on Page 52). For example, the police department might use four frequencies, one for each side of town.
-520.fm Page 20 Wednesday, August 4, 1999 3:06 PM OPERATION TURNING ON THE SCANNER AND SETTING SQUELCH Note: Make sure the scanner's antenna is connected before you turn it on. 1. Turn SQUELCH fully clockwise. 2. Turn VOLUME/OFF clockwise until it clicks and you hear a hissing sound. 3. Press MANUAL and turn SQUELCH counterclockwise, then leave it set to a point just after the hissing sound stops.
20-520.fm Page 21 Wednesday, August 4, 1999 3:06 PM Notes: • If you have not stored frequencies into any channels, the scanner does not scan. • If the scanner picks up unwanted, partial, or very weak transmissions, turn SQUELCH counterclockwise to decrease the scanner's sensitivity to these signals. If you want to listen to a weak or distant station, turn SQUELCH clockwise. • If SQUELCH is adjusted so you always hear a hissing sound, the scanner does not scan properly.
20-520.fm Page 22 Wednesday, August 4, 1999 3:06 PM 3. Press E to store the frequency into the channel. Notes: • If you made a mistake in Step 2, Error appears and the scanner beeps when you press E. Simply start again from Step 2. • Your scanner automatically rounds the entered frequency to the nearest valid frequency. For example, if you enter a frequency of 151.473, your scanner accepts it as 151.475.
20-520.fm Page 23 Wednesday, August 4, 1999 3:06 PM 4. Use the number keys and • to enter the frequency that is the upper limit of the range you want to search. 5. Press LIMIT, then press SRCH. The scanner begins to search from the lower limit to the upper limit. 6. When the scanner stops on a transmission, quickly press either: • E to store the displayed frequency into the channel. The scanner stores the frequency and continues searching. • s or t to stop searching so you can listen to the transmission.
20-520.fm Page 24 Wednesday, August 4, 1999 3:06 PM Your scanner has the following preprogrammed service banks. • POLICE — contains 1,079 police frequencies. • FIRE/EMG — contains 280 fire and emergency service frequencies. • AIR — contains 2,319 aircraft and air service frequencies. • MRN contains 65 marine frequencies. • WX — contains 7 weather frequencies. To select a service bank, press SVC. A service bank’s name (POLICE, FIRE/EMG, AIR, MRN, or WX) and one of the preset police frequencies appear.
20-520.fm Page 25 Wednesday, August 4, 1999 3:06 PM SCANNING THE STORED CHANNELS To begin scanning channels, press SCAN. The scanner scans through all non-locked channels in the activated banks. When the scanner finds a transmission, it stops on it. When the transmission ends, the scanner resumes scanning. Note: To scan in the trunk tracking mode, see “Scanning a Trunked Bank” on Page 36. MANUALLY SELECTING A CHANNEL You can continuously monitor a single channel without scanning.
20-520.fm Page 26 Wednesday, August 4, 1999 3:06 PM SPECIAL FEATURES DELAY Many agencies use a two-way radio system that might have a period of 2 or more seconds between a query and a reply. To keep from missing a reply, you can program a 2-second delay into any channel or frequency. The scanner continues to monitor the frequency for 2 seconds after the transmission stops before resuming scanning or searching.
20-520.fm Page 27 Wednesday, August 4, 1999 3:06 PM TURNING CHANNEL-STORAGE BANKS ON AND OFF You can turn each channel-storage bank on and off. When you turn off a bank, the scanner does not scan any of the 30 channels in that bank. While scanning, press the number key that corresponds to the bank you want to turn on or off. If the bar under the bank number is on, the bank is turned on and the scanner scans all channels within that bank that are not locked out.
20-520.fm Page 28 Wednesday, August 4, 1999 3:06 PM Note: You can still manually select locked-out channels. To remove the lockout from a channel, manually select the channel and hold down L/O until L/O disappears from the display. To unlock all channels in the banks that are turned on, press MANUAL to stop scanning, then hold down L/O until the scanner beeps twice.
20-520.fm Page 29 Wednesday, August 4, 1999 3:06 PM The scanner automatically designates each bank's first channel as its priority channel. Follow these steps to select a different channel as the priority channel for a bank. 1. Press MANUAL. 2. Enter the channel number you want to select as the priority channel, then press MANUAL again. 3. Hold down PRI until the scanner beeps twice. P appears to the left of the channel number. 4.
20-520.fm Page 30 Wednesday, August 4, 1999 3:06 PM USING THE KEYLOCK Once you program your scanner, you can protect it from accidental program changes by turning on the keylock feature. When locked, the only controls that operate are SCAN, MANUAL, LOCK/ , VOLUME/OFF, and SQUELCH. Note: The keylock does not prevent the scanner from scanning channels. To turn on the keylock, hold down LOCK/ appears. To turn it off, hold down LOCK/ disappears.
20-520.fm Page 31 Wednesday, August 4, 1999 3:06 PM To switch between normal and HyperSearch speeds, during a limit search, press SPEED/PRI. SRCH flashes during hypersearch. Note: You can use HyperSearch only in the 5 kHz step bands (29–54 MHz and 137–174 MHz). BATTERY SAVE To save battery power when a channel is manually selected, the scanner’s battery save function automatically sets the scanner to a standby mode if the scanner does not receive any signals for more than 1 minute.
20-520.fm Page 32 Wednesday, August 4, 1999 3:06 PM TRUNK TRACKING Your scanner is designed to track transmissions on Motorola Type I, Type II, and hybrid analog trunking systems, which are extensively used in 800 MHz communications. Remember these important points when tracking transmissions: • Your scanner monitors Type II systems by default.
20-520.fm Page 33 Wednesday, August 4, 1999 3:06 PM The fleets might be the police department, the fire department, utilities, and city administration. The police might decide to further divide its fleet into subfleets such as dispatch, tactical operations, detectives, north, south, east and west side patrols, and supervisors.
20-520.fm Page 34 Wednesday, August 4, 1999 3:06 PM SETTING SQUELCH FOR THE TRUNK TRACKING MODE Your scanner’s squelch setting is automatically adjusted in the trunking mode, which means it is not necessary to manually adjust squelch while tracking trunked transmissions. However, the squelch setting can affect how fast your scanner acquires the data channel, and, in some instances, can prevent your scanner from acquiring the data channel at all.
20-520.fm Page 35 Wednesday, August 4, 1999 3:06 PM 1. Hold down TRUNK until the scanner beeps twice. BANK, TRUNK, and the bank numbers flash. 2. Select the bank you want to store the trunked system’s frequencies in by pressing a number key. The scanner automatically selects the first channel in the bank when you select the bank. 3. Use the number keys to enter the trunked system’s frequencies, then press E.
20-520.fm Page 36 Wednesday, August 4, 1999 3:06 PM 5. Repeat Steps 3 and 4 until all frequencies have been entered. 6. Press SRCH to begin searching for the trunk’s data channel (the channel that controls the trunk). SRCH flashes as the scanner searches for the data channel. While the scanner looks through the frequencies, you see them on the display. When the scanner finds the data channel, it begins trunk tracking. SCANNING A TRUNKED BANK You can scan one trunked bank at a time.
20-520.fm Page 37 Wednesday, August 4, 1999 3:06 PM Note: To review the bank currently in use, press DATA while in the trunk tracking mode. The bar for the selected bank flashes at the top of the display for about 5 seconds. 3. To return to non-trunked scanning, press again. TRUNK Hint: While scanning, you will not know exactly who the ID's are assigned to until you listen awhile or until you locate ID lists in frequency guides or on internet sites such as www.trunkscanner.com.
20-520.fm Page 38 Wednesday, August 4, 1999 3:06 PM Locking Out IDs As with conventional scanning, it is possible to lock out unwanted traffic. This is particularly important in trunked systems because signals you cannot listen to (such as water meters, door alarms, traffic signals, and encrypted signals) are assigned IDs just like other users. You can have up to 100 IDs locked out at one time. Note: If you lock out an ID while searching, it is also locked out of the scan list(s).
20-520.fm Page 39 Wednesday, August 4, 1999 3:06 PM Using Trunk Tracking Scan Delay Many trunked systems have a period of 2 or more seconds between a query and a reply. You can program a 5-second delay to hold on an ID for 5 seconds to wait for a reply. The scanner continues to monitor the frequency for 5 seconds after the transmission stops before resuming scanning. Press DLY to turn trunk tracking scan delay on or off. DLY appears when trunk tracking scan delay is set.
20-520.fm Page 40 Wednesday, August 4, 1999 3:06 PM CHANNEL ACTIVITY INDICATORS Your scanner has 20 channel activity indicators (bars) which show the activity taking place on a trunked system. You can see how many frequencies are being used and generally monitor how much communication traffic is occurring. Each frequency you store in a trunking bank has a corresponding activity indicator.
20-520.fm Page 41 Wednesday, August 4, 1999 3:06 PM SCAN LISTS When you program trunked frequencies into a bank (see “Programming Trunked Frequencies” on Page 34), your scanner sets up 5 scan lists into which you can store your favorite IDs. Each list can contain up to 10 IDs, so you can store a total of 50 IDs for each trunk tracking bank (500 IDs if you use all banks as trunking banks!). Scan lists help you organize trunking system users into categories.
20-520.fm Page 42 Wednesday, August 4, 1999 3:06 PM 4. Enter the Type II ID you want to store, then press E. Or, to enter a Type I ID: a. Use the number keys to enter the block number and the fleet number, then press •. b. Enter the subfleet number, then press E. Note: To clear a mistake while entering an ID, press • twice, then start over at Step 1. 5. Repeatedly press MANUAL or s to select the next scan list location you want to program. Then repeat Step 4 to enter another ID.
20-520.fm Page 43 Wednesday, August 4, 1999 3:06 PM 2. Press SRCH to resume searching. Deleting a Stored ID 1. Repeatedly press s or t to select the scan list location (shown at the top of the display) you want to delete. 2. Press 0 then E. SCANNING THE SCAN LISTS Press SCAN to begin scanning the lists you have programmed. Note: If you haven't programmed any IDs, SCAN scrolls on the display but your scanner does not stop on an active conversation.
20-520.fm Page 44 Wednesday, August 4, 1999 3:06 PM list indicator turns off, and the IDs in that list are not scanned. Note: One scan list must always be active. If you try to remove all the scan lists, the first scan list will stay active. To restore a scan list to active scanning, use the number keys to enter its number again. Press SRCH to return to the scanner’s previous function. To alternate the display between the channel activity indicators and the scan list indicators, press PRI.
20-520.fm Page 45 Wednesday, August 4, 1999 3:06 PM 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 duplicated 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.
20-520.fm Page 46 Wednesday, August 4, 1999 3:06 PM systems, you must select or program a fleet map with the same size code assignments as the trunked system. If you do this accurately, you will track all the fleet and subfleet combinations used by the system. In other words, you will hear complete communications while monitoring a trunked system. Note: Preset fleet maps might be www.trunkscanner.com. available at If you do not already know the size codes used, you will have to guess them.
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20-520.fm Page 48 Wednesday, August 4, 1999 3:06 PM 5 S0 5 S0 5 S0 6 S4 6 S0 6 S0 7 S4 7 S0 7 S4 E1P13 E1P14 E1P15 Block Size Code Block Size Code Block Size Code 0 S3 0 S4 0 S4 1 S3 1 S3 1 S4 2 S11 2 S10 2 S4 3 S4 3 S4 3 S11 4 S4 4 S4 4 S11 5 S0 5 S4 5 S0 6 S0 6 S12 6 S12 7 S0 7 --- 7 --- E1P16 Block Size Code 0 S3 1 S10 2 S10 3 S11 4 S0 5 S0 6 S12 7 --- Selecting a Preset Fleet Map 1.
20-520.fm Page 49 Wednesday, August 4, 1999 3:06 PM 2. Press DATA. 3. Repeatedly press s or t to select E1, then press DATA again.4. Repeatedly press s or t to select the name of the map you want (such as P7), then press E. The scanner then searches for transmissions using the preset map you chose. Note: When the scanner searches for transmissions, you see Type I fleet and subfleet IDs such as 100-12 , 100-9, 000-12, or 400-8.
20-520.fm Page 50 Wednesday, August 4, 1999 3:06 PM 6. Repeatedly press s or t to select the size code for the first block, then press E.- The next available block appears. 7. Repeat Step 6 until you have selected a size code for each block you want to work with. 8. Press SRCH. The scanner exits the trunking programming mode, tunes the data channel, then begins to search using the map you programmed.
20-520.fm Page 51 Wednesday, August 4, 1999 3:06 PM A GENERAL GUIDE TO SCANNING Reception of the frequencies covered by your scanner is mainly “line-of-sight.” That means you usually cannot hear stations that are beyond the horizon. GUIDE TO FREQUENCIES National Weather Frequencies 162.400 162.425 162.450 162.475 162.500 162.525 162.550 Canadian Weather Frequencies 161.650 161.775 163.
20-520.fm Page 52 Wednesday, August 4, 1999 3:06 PM GUIDE TO THE ACTION BANDS Typical Band Usage VHF Band Low Range 6-Meter Amateur U.S. Government 2-Meter Amateur High Range 29.00–50.00 MHz 50.00–54.00 MHz 137.00–144.00 MHz 144.00–148.00 MHz 148.00–174.00 MHz UHF Band U.S.
20-520.fm Page 53 Wednesday, August 4, 1999 3:06 PM UHF Band Activities Land-Mobile “Paired” Frequencies Base Stations Mobile Units Repeater Units Control Stations Frequencies 450.000–470.000 MHz 451.025–454.950 MHz 456.025–459.950 MHz 460.025–464.975 MHz 465.025–469.975 MHz Note: Remote control stations and mobile units operate at 5 MHz higher than their associated base stations and relay repeater units.
20-520.fm Page 54 Wednesday, August 4, 1999 3:06 PM PTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Private Trunked ROAD . . . . . . . . . . . . . . . . . . . . Road & Highway Maintenance RTV . . . . . . . . . . . . . . . . . . Radio/TV Remote Broadcast Pickup TAXI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taxi Services TELB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mobile Telephone . .
20-520.fm Page 55 Wednesday, August 4, 1999 3:06 PM 150.995–151.475 . . . . . . . . . . . . . . . . . . . . . . . . . . ROAD, POL 151.490–151.955 . . . . . . . . . . . . . . . . . . . . . . . . . . . . IND, BUS 151.985 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TELM 152.0075 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MED 152.030–152.240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TELB 152.270–152.480 . . . . . . . . . .
20-520.fm Page 56 Wednesday, August 4, 1999 3:06 PM 458.025–458.175 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MED 460.0125–460.6375 . . . . . . . . . . . . . . . . . . . . FIRE, POL, PUB 460.650–462.175 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BUS 462.1875–462.450 . . . . . . . . . . . . . . . . . . . . . . . . . . . BUS, IND 462.4625–462.525 . . . . . . . . . . . . . . . . . IND, OIL, TELM, UTIL 462.550–462.925 . . . . . . . . . . . . . . . . . . . . . . . . . .
20-520.fm Page 57 Wednesday, August 4, 1999 3:06 PM 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 the number of megahertz by 1,000: 9.62 (MHz) x 1000 = 9620 kHz To convert from kHz to MHz, divide the number of kilohertz by 1,000: 2780 (kHz) ÷ 1000 = 2.
20-520.fm Page 58 Wednesday, August 4, 1999 3:06 PM TROUBLESHOOTING If you have problems, here are some suggestions that might help. If they do not, take your scanner to your local RadioShack store for assistance. PROBLEM Scanner is on but will not scan. Scanner is totally inoperative. POSSIBLE CAUSE SQUELCH is not correctly adjusted. REMEDY Adjust SQUELCH counterclockwise. Only one channel or no channels are stored. Store frequencies into more than one channel. No power.
20-520.fm Page 59 Wednesday, August 4, 1999 3:06 PM POSSIBLE CAUSE REMEDY Poor or no reception (continued) An antenna is not connected or connected incorrectly. Make sure an antenna is connected to the scanner. Error Programming error. Reprogram the frequency correctly, including the decimal point. In the scan mode, the scanner locks on frequencies that have an unclear transmission. Programmed frequencies are the same as “birdie” frequencies.
20-520.fm Page 60 Wednesday, August 4, 1999 3:06 PM PROBLEM Scanner will not acquire a data channel. Missing replies to conversations. Channel activity indicators are flashing but no sound is heard. 60 POSSIBLE CAUSE SQUELCH is not correctly adjusted for trunk tracking. REMEDY Adjust squelch for trunk tracking. See “Setting Squelch for the Trunk Tracking Mode” on Page 33. The frequency used for the data channel is missing. Add the frequency used for the data channel to the frequency list.
20-520.fm Page 61 Wednesday, August 4, 1999 3:06 PM CARE AND MAINTENANCE Your RadioShack PRO-90 300-Channel TrunkTracker Scanner is an example of superior design and craftsmanship. The following suggestions will help you care for your scanner so you can enjoy it for years. Keep the scanner dry. If it gets wet, wipe it dry immediately. Liquids can contain minerals that can corrode the electronic circuits. Use only rechargeable batteries of the recommended size and type.
20-520.fm Page 62 Wednesday, August 4, 1999 3:06 PM SPECIFICATIONS Frequency Coverage: ........ 29–54 MHz (in 5 kHz steps) 108–136.9875 MHz (in 12.5 kHz steps) 137–174 MHz (in 5 kHz steps) 406–512 MHz (in 12.5 kHz steps) 806.0000–823.9875 MHz (in 12.5 kHz steps) 849.0125–868.9875 MHz (in 12.5 kHz steps) 894.0125–956.0000 MHz (in 12.5 kHz steps) Channels ................................................................. 300 Number of Banks .......................................................
20-520.fm Page 63 Wednesday, August 4, 1999 3:06 PM Power Requirements ......... Rechargeable Battery Pack (4.8 VDC), or AC Adapter/Charger or Optional DC Adapter (12 VDC 200 mA) Current Drain: Squelched .................................................... 70 mA Full Output .................................................. 180 mA Dimensions (HWD) ..................... 6 × 21/3 × 111/16 Inches (153 × 63.5 × 43 mm) Weight ....................................................................
20-520.fm Page 64 Wednesday, August 4, 1999 3:06 PM Limited One-Year Warranty This product is warranted by RadioShack against manufacturing defects in material and workmanship under normal use for one (1) year from the date of purchase from RadioShack company-owned stores and authorized RadioShack franchisees and dealers.
