Owner’s Manual Cat. No. 20-521 PRO-91 150-Channel Handheld Trunking Scanner Please read before using this equipment.
FEATURES Your RadioShack PRO-91 150-Channel Handheld Trunking Scanner is one 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. Trunking communications systems let a large group of 2-way radio users (or even different groups of 2-way radio users) efficiently use a large range of frequencies.
Five Channel-Storage Banks — you can store up to 30 channels in each of 5 different banks to group channels so you can more easily identify calls. Five Scan Lists — you can store up to 50 trunking IDs in each trunk tracking bank. 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.
Flexible Antenna with BNC Connector — provides excellent reception and is designed to help prevent antenna breakage. Or, you can connect an external antenna. Monitor Memories — let you temporarily store up to 5 frequencies or IDs. Memory Backup — keeps the frequencies stored in memory for an extended time if the PRO-91 loses power.
We recommend you record your scanner’s serial number here. The number is on the back 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.
quires that scanners be manufactured in such a way as to not be easily modifiable to pick up those transmissions. Do not open your scanner's case to make any modifications that could allow it to pick up transmissions that it is not legal to listen to. Doing so could subject you to legal penalties. We encourage responsible, legal scanner use. CONTENTS Preparation ............................................................ Power Sources .................................................
Special Features .................................................... Delay ................................................................ Turning Channel-Storage Banks On and Off ... Locking Out Channels ...................................... Priority .............................................................. Using the Keylock ............................................ Using the Display Backlight .............................. Changing Search Speeds ................................
Frequency Conversion 63 Troubleshooting 64 Resetting the Scanner ..................................... 67 Care and Maintenance .......................................... 68 Specifications ........................................................
PREPARATION POWER SOURCES You can power your scanner from any of three sources: • Internal batteries (not supplied) • Standard AC power (using an optional AC adapter) • Vehicle battery power (using an optional DC adapter) Using Internal Batteries You can power your scanner using four AA batteries. For the longest operation and best performance, we recommend alkaline batteries (such as Cat. No. 23552). You can also use four rechargeable nickel-cadmium batteries (Cat. No. 23-125).
3. If you are installing alkaline batteries, use a pointed object such as a pencil to set ALKALINE JACK NI-CD inside the compartment to ALKALINE. Or, if you are installing nickel-cadmium batteries, set it to NI-CD. Warning: Never set ALKALINE JACK NI-CD to NI-CD if you are installing non-rechargeable batteries. Non-rechargeable batteries can get hot or explode if you try to recharge them. 4.
If BATT.Lo flashes and the scanner beeps every 15 seconds, replace (standard/alkaline) or recharge (rechargeable nickel-cadmium) the batteries. Caution: Always dispose of old batteries promptly and properly. Do not bury or burn them. Charging Nickel-Cadmium Batteries The scanner has a built-in circuit that lets you recharge nickel-cadmium batteries while they are in the scanner.
Important: At the end of a rechargeable battery’s useful life, it must be recycled or disposed of properly. Contact your local, county, or state hazardous waste management authorities for information on recycling or disposal programs in your area. Some options that might be available are: municipal curb-side collection, drop-off boxes at retailers such as your local RadioShack store, recycling collection centers, and mailback programs.
1. Turn VOLUME/OFF counterclockwise until it clicks to make sure the power is turned off. 2. Plug the adapter’s 3.4 mm outside diameter/1.3 mm inside diameter barrel plug into your scanner’s POWER jack. 3. Plug the other end of the adapter into a standard AC outlet. If rechargeable batteries are installed and ALKALINE NI-CD is set to NI-CD , the adapter powers the scanner and recharges the batteries at the same time.
1. Turn VOLUME/OFF counterclockwise until it clicks to make sure the power is turned off. 2. Set the adapter’s voltage switch to 9V. 3. Connect the 3.4 mm outer diameter/1.3 mm inner diameter tip to the adapter cord, matching TIP to –. 4. Plug the adapter’s barrel plug into your scanner’s POWER jack. 5. Plug the other end of the adapter into your vehicle’s cigarette-lighter socket.
CONNECTING THE ANTENNA Follow these steps to attach the supplied flexible antenna to the connector on the top of your scanner. 1. Align the slots around the antenna’s connector with the tabs on the scanner’s BNC connector. 2. Slide the antenna’s connector down over the scanner’s connector and rotate the antenna connector’s outer ring clockwise until it locks into place.
CONNECTING AN EARPHONE/ HEADPHONES For private listening, you can plug an earphone or mono headphones (such as Cat. No. 33-178 or 20210) 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. Extended high-volume listening can lead to permanent hearing loss.
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 / 8-inch mini-plug into your scanner’s jack. ATTACHING THE BELT CLIP You can attach the supplied belt clip to make your scanner easier to use when you are on the go. Use a Phillips screwdriver and the supplied screws to attach the belt clip to the scanner. Then slide the clip over your belt or waistband.
ABOUT 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 determine the type of communications you want to receive, then set the scanner to scan those communications. A frequency is the tuning location of a station (expressed in kHz or MHz). To find active frequencies, you use the search function.
A LOOK AT THE KEYPAD Your scanner’s keys might seem confusing at first, but this information should help you understand each key’s function. HOLD — holds the frequency search; holds on the cur- rent ID in the trunk tracking mode. SCAN — scans through the stored channels. MAN (manual) — stops scanning and lets you directly enter a channel number or frequency. PROG (program) — stores frequencies into channels; programs the trunking frequency, fleet map, and ID memories.
DELAY — programs a 2-second delay for the selected channel, a limit search, or each service scan; programs a 5-second delay while trunk tracking. t — searches down through a selected frequency range during a frequency search; selects options during program operation; changes the ID location number while trunk tracking. s — searches up through a selected frequency range during a frequency search; selects options during program operation; changes the ID location number while trunk tracking.
(trunking channel activity bars) — each represents a received trunking frequency or a data frequency while trunk tracking (see “Channel Activity Bars” on Page 47). -1- — appears when the weather service band is selected. -2- — appears when the amateur radio service band is selected. -3- — appears when the marine service band is selected. -4- — appears when the air service band is selected. -5- — appears when the police service band is selected. P — appears when a priority channel is selected. BATT.
MON — appears during search modes or when you select a monitor memory. The number to the right of this indicator shows the current monitor memory number. MAN — appears when you press MAN. PGM — appears while you store a frequency into a channel, while you enter a frequency range during a limit search, or when you program trunking frequencies, fleet maps, or ID memories while trunk tracking. HYPER — appears while Hyperscan or Hypersearch is active during a direct or limit search.
Monitor Memories The scanner also has 5 temporary memory locations called monitor memories. You can use these monitor memories to temporarily store frequencies while you decide whether to store them into a channel. This is handy for quickly storing an active frequency when you search through an entire band (see “Searching For and Temporarily Storing Active Frequencies” on Page 26). While you are searching frequencies, the 5 numbers at the top of the display indicate the 5 monitor memories.
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 counterclockwise. 2. Turn VOLUME/OFF clockwise until it clicks and you hear a hissing sound. 3. Press MAN (manual) to stop the scanner from scanning, turn SQUELCH clockwise, then leave it set to a point just after the hissing sound stops.
STORING KNOWN FREQUENCIES INTO CHANNELS Good references for active frequencies are RadioShack's “Beyond Police Call,” “Aeronautical Frequency Directory,” and “Maritime Frequency Directory.” We update these directories every year, so be sure to get a current copy. Follow these steps to store frequencies into channels. 1. Press MAN, enter the channel number where you want to store a frequency, then press PROG. The channel number appears. 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. • Press DELAY if you want the scanner to pause 2 seconds after a transmission ends before it proceeds to the next channel (see “Delay” on Page 33). The scanner also stores this setting in the channel. 4. If you want to program the next channel in sequence, press PROG and repeat Steps 2 and 3.
2. Enter the frequency that is the lower limit of the range you want to search (including the decimal point), then press E. 3. Press LIMIT. Hi and 956.000 MHz appear. 4. Enter the frequency that is the upper limit of the range you want to search (including the decimal point), then press E again. 5. Press t to search from the upper to the lower limit, or s to search from the lower to the upper limit. 6.
Notes: • If you want to start the search from a frequency already stored in one of your scanner’s channels, press MAN or PROG, use the number keys to enter the channel number, then press MAN or PROG again. • If you enter an invalid frequency, the scanner displays Error. Simply repeat this step. 3. Press t to search downward or s to search upward from the selected frequency. -d-, SEARCH, and t or s appear. 4.
When the scanner stops on a transmission, quickly press either: • HOLD to stop searching so you can listen to the transmission. HOLD appears. • MON/CLEAR to store the displayed frequency into the current monitor memory. To release hold and continue searching, press HOLD or hold down t or s for at least 1 second. Or, if you did not press HOLD, simply press t or s to continue searching.
Notes: • If you marked all frequencies to be skipped within the search range, the scanner beeps 3 times and does not search. • If you program more than 20 frequencies to skip, each new frequency replaces one you already stored, starting from the first frequency you stored. • Press t or s to select a skipped frequency while HOLD appears. L/O appears when you select a skipped frequency.
3. Press MON/CLEAR and enter the number of the monitor memory that contains the frequency you want to store. 4. Press E. The scanner stores the frequency into the selected channel. SCANNING THE STORED CHANNELS To begin scanning channels, press SCAN. The scanner scans through all non-locked channels in the activated banks. (See “Locking Out Channels” on Page 34 and “Turning Channel-Storage Banks On and Off” on Page 33). When the scanner finds a transmission, it stops on it.
Or, if your scanner is scanning and stops at the desired channel, press MAN one time. (Pressing MAN additional times causes your scanner to step through the channels.) To resume automatic scanning, press SCAN .
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 on a specific channel, you can program a 2-second delay into any channel or frequency. The scanner continues to monitor the channel frequency for 2 seconds after the transmission stops before resuming scanning or searching.
The scanner scans all the channels within the displayed banks that are not locked out (see “Locking Out Channels”). Notes: • You can manually select any channel within a bank, even if that bank is turned off. • You cannot turn off all banks. One bank must always be active. LOCKING OUT CHANNELS You can increase the scanning speed by locking out channels that have a continuous transmission, such as a weather channel. To lock out a channel, manually select the channel, then press L-OUT. L/O appears.
1. Press PROG. 2. Enter the channel number you want to select as the priority channel, then press PRIORITY. P appears to the right of the channel number. 3. Repeat Steps 1 and 2 for the channel in each bank you want to program as a priority channel. To review all priority channels, press PROG, then repeatedly press PRIORITY to see the numbers of the priority channels. To turn on the priority feature, press PRIORITY during scanning. PRI appears.
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, MAN , KEYLOCK, VOLUME/OFF, and SQUELCH. Note: The keylock does not prevent the scanner from scanning channels. To turn on the keylock, hold down KEYLOCK until K/L appears. To turn it off, hold down KEYLOCK until K/L disappears. USING THE DISPLAY BACKLIGHT You can turn on the display light for easy viewing at night.
TURNING THE KEY TONE OFF/ON To turn off the key tone, follow these steps. 1. Turn off the scanner. 2. While holding down L-OUT/S/S, turn on the scanner. OFF bEEP appears. To turn the key tone back on, repeat these steps. on bEEP appears.
SKIPPING DATA SIGNALS You can set the scanner so it skips nonmodulated or data signals (such as fax or modem transmissions) during a search or scan. Note: Since data signals are not generally found in the air band, this feature does not work in the air band. To turn on the data skip feature, be sure the priority feature is turned off (see “Priority” on Page 34), then press DATA . DATA appears. To turn off the feature, press DATA again. DATA disappears.
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. However, you can change this if the system in your area is different (see “Types of Trunking Systems” below and “Scanning Type I and Hybrid Trunked Systems” on Page 50 for more information).
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. All the available police radios would then be assigned to one of the police subfleets, letting the police centralize their communications and control the type of users on a single system.
SETTING SQUELCH FOR THE TRUNK TRACKING MODE Your scanner’s squelch setting is automatically adjusted during trunk tracking, 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. We recommend you set SQUELCH to this position before selecting a trunked bank.
Before scanning a trunked system’s transmissions, you must store the trunked system’s frequencies in one of the banks in your scanner by following these steps. 1. Press PROG then TRUNK. TRUNK appears and one or more 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 one of the trunked system’s frequencies, then press E.
6. Press SRC to begin searching for the trunk’s data channel (the channel that controls the trunk). SEARCH 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.
Hint: While scanning, you will not know exactly who the IDs 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. Within a few minutes, you can usually figure out if what you are listening to is a police, fire, or emergency medical 2-way radio user.
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). See “Scan Lists” on Page 48.
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 DELAY to turn trunk tracking scan delay on or off. DLY appears when trunk tracking scan delay is set.
CHANNEL ACTIVITY BARS 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 bar.
SCAN LISTS When you program trunked frequencies into a bank (see “Storing Trunked Frequencies” on Page 41), 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 (250 IDs if you use all banks as trunking banks!). Scan lists help you organize trunking system users into categories.
Or, to enter a Type I ID: a. Use the number keys to enter the block number and fleet number, then press •. b. Enter the subfleet number, then press E. Note: To clear a mistake while entering an ID, press 0 then E, then start over at Step 1. 5. Repeatedly press PROG or s to select the next scan list location you want to program. Then repeat Step 4 to enter another ID. Moving IDs to Scan Lists 1. Press MAN. MAN appears. 2. Select the ID scan list location where you want to store the IDs. Then press PROG.
SCANNING THE SCAN LISTS Press SCAN to begin scanning the lists you have stored. Note: If you have not stored any IDs, SCAN scrolls on the display, but your scanner does not stop on an active conversation. To remove a scan list from active scanning, use the number keys to enter the scan list’s number. The scan list number turns off, and the IDs in that list are not scanned. Note: One scan list must always be active. You cannot remove all of the scan lists.
4. Press DATA again. 5. Repeatedly press s or t to select the name of the map you want (such as E1P7). The preprogrammed fleet map appears. 6. Press E, then SRC. 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. How do you know if the preset map you selected is correct? Listen to see if you are following complete conversations.
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 assigned 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 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.
The size codes selected by a Type I system designer depend on the specific needs of the system's users. Some organizations might want many subfleets with only a few radios each, while another organization might want only a few subfleets, with many radios each. To scan Type I 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.
E1P4 E1P5 E1P6 Block Size Code Block Size Code Block Size Code 0 S12 0 S4 0 S3 1 (S12) 1 S4 1 S10 2 S4 2 S12 2 S4 3 S4 3 (S12) 3 S4 4 S4 4 S4 4 S12 5 S4 5 S4 5 (S12) 6 S4 6 S4 6 S12 7 S4 7 S4 7 (S12) E1P7 E1P8 E1P9 Block Size Code Block Size Code Block Size Code 0 S10 0 S1 0 S4 1 S10 1 S1 1 S4 2 S11 2 S2 2 S0 3 S4 3 S2 3 S0 4 S4 4 S3 4 S0 5 S4 5 S3 5 S0 6 S4 6 S4 6 S0 7 S4 7 S4 7 S0 E1P10 E1P11
E1P13 E1P14 Block Size Code Block Size Code 0 S3 0 S4 1 S3 1 S3 2 S11 2 S10 3 S4 3 S4 4 S4 4 S4 5 S0 5 S4 6 S0 6 S12 7 S0 7 S12 E1P15 E1P16 Block Size Code Block Size Code 0 S4 0 S3 1 S4 1 S10 2 S4 2 S10 3 S11 3 S11 4 S11 4 S0 5 S0 5 S0 6 S12 6 S12 7 S12 7 S12 Selecting a Preset Fleet Map 1. Set the scanner for conventional scanning, press PROG, then press TRUNK. 2.
9. Press SRC. The scanner exits the trunking programming mode, tunes the data channel, then begins to search using the map you programmed. Note: If you select size code S-12, S-13, or S-14, these restrictions apply: • S-12 can only be assigned to Blocks 0, 2, 4, or 6. • S-13 can only be assigned to Blocks 0 and 4. • S-14 can only be assigned to Block 0. Since these size codes require multiple blocks, you will be prompted for the next available block when programming a fleet map.
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 161.650 161.775 163.275 Note: These frequencies are not preprogrammed in the weather service bank but can be manually programmed into a channel.
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.
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.
ROAD . . . . . . . . . . . . . . . . . . . Road & Highway Maintenance RTV. . . . . . . . . . . . . . . . .Radio/TV Remote Broadcast Pickup TAXI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taxi Services TELB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mobile Telephone (Aircraft, Radio Common Carrier, Landline Companies) TELC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cordless Phones TELM . . . . . . . . . . . . . . . . . . . . . . . .
152.0075 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MED 152.030–152.240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TELB 152.270–152.480 . . . . . . . . . . . . . . . . . . . . . IND, TAXI, BUS 152.510–152.840 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TELB 152.870–153.020 . . . . . . . . . . . . . . . . . . . . . . . . . . IND, MOV 153.035–153.725 . . . . . . . . . . . . . . . . . . . . . . IND, OIL, UTIL 153.740–154.445 . . . . . . . . . . . .
462.9375–463.1875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . MED 463.200–467.925 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BUS FM-TV Audio Broadcast, UHF Wide Band (470–512 MHz) (Channels 14 through 69 in 6 MHz steps) 475.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 14 481.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 15 487.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 16 .. . .
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 adjusted correctly. REMEDY Turn SQUELCH clockwise. Only one channel or no channels are stored. Store frequencies into more than one channel. No power. Check the batteries or make sure the AC adapter or DC adapter is connected properly.
PROBLEM POSSIBLE CAUSE REMEDY PROBLEM POSSIBLE CAUSE REMEDY An antenna is not connected or connected incorrectly. Make sure an antenna is connected to the scanner. Programming error. Re-enter the frequency correctly, including the decimal point. The scanner locks on frequencies that have an unclear transmission. Stored frequencies are the same as “birdie” frequencies. Avoid storing frequencies listed under “Birdie Frequencies” on Page 57 or only listen to them manually.
PROBLEM Scanner will not stop while scanning a scan list. Scanner will not acquire a data channel. Missing replies to conversations. Missing replies to conversations (continued) POSSIBLE CAUSE REMEDY No IDs have been stored. Store one or more IDs (see “Scan Lists” on Page 48. The IDs you have stored are not active. Scan another transmission. SQUELCH is not Adjust squelch for trunk tracking. See “Setting Squelch for the Trunk Tracking Mode” on Page 41. correctly adjusted for trunk tracking.
PROBLEM Channel activity bars are flashing but no sound is heard. POSSIBLE CAUSE REMEDY The transmission might be a private or telephone interconnect call. The scanner does not scan these types of transmissions. Scan for another transmission. The ID shown is not active. Wait for the ID to become active, or scan another transmission. RESETTING THE SCANNER If the scanner’s display locks up or does not work properly, you might need to reset the scanner.
CARE AND MAINTENANCE Your RadioShack PRO-91 150-Channel Handheld Trunking 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 batteries of the recommended size and type. Always remove old and weak batteries. They can leak chemicals that destroy electronic circuits.
SPECIFICATIONS Frequency Coverage: ..... 29–54 MHz (in 5 kHz steps) 108–136.975 MHz (in 12.5 kHz steps) 137–174 MHz (in 5 kHz steps) 406–512 MHz (in 12.5 kHz steps) 806.0000–823.9375 MHz (in 12.5 kHz steps) 851.0000–868.9875 MHz (in 12.5 kHz steps) 896.1125–956.0000 MHz (in 12.5 kHz steps) Monitor Channels 5 Number of Banks 5 Sensitivity (AM/FM): NFM: 20 dB S/N at 3 kHz deviation): 29–54 MHz 0.5 µV 137–174 MHz 0.4 µV 406–512 MHz 0.4 µV 806–956 MHz 0.6 µV AM: 20 dB S/N at 60% modulation): 108–136.9875 MHz 1.
Power Requirement: 4 AA Alkaline Batteries (6.0 VDC), or 4 AA Rechargeable Ni-Cd Batteries (4.8 VDC), or AC Adapter (Cat. No. 273-1665), or DC Adapter (Cat. No. 270-1560) Current Drain: Squelched .................................................. 70 mA Full Output ............................................... 180 mA Dimensions (HWD) ............... 61/4 × 21/2 × 19/16 Inches (158 × 63 × 40 mm) Weight (without antenna, batteries, belt clip) ..... 8.
NOTES 70
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.
