Radio Shack 21-1850 User manual

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OWNER’S MANUAL
FRS RADIO
21-1850
INTRODUCTION
Your Radio Shack remote control FRS Radio is a mobile type radio. Magnet –mounted antenna
RF base can be mounted on the top of the car. It provides the best antenna efficiency than any
hand-held type FRS transceiver. The remote control unit is linked with a cable and provides an
easy to use in a comfortable environment.
You can start using your FRS radio immediately without any license required! Your radio comes
with 14 FRS channels and you can talk with another person who has a FRS radio and is on the
same channel and privacy code that you are using.
Your remote unit offers a multifunctional liquid crystal display with backlight, auto-squelch which
eliminates noise between transmission, built-in modulation limiter circuit which automatically
adjust the radio for a wide variety of voice levels to ensure a clear transmission, memory
retention and keypad lock.
USING THE RADIO
A. DISPLAY
The remote unit comes with a multifunctional backlight display. By pressing any button except the
CALL and PTT, the backlight will illuminate for 7 seconds. The liquid crystal display has been
enlarged to show all of the operating modes.
1. Shows the selected channel number.
2. Shows the selected quiet code number.
3. “QUIET”: Displayed when the QUIET privacy mode is enabled.
4. “ ”:Displays when your radio is transmitting or the CALL button is pressed.
5. “BUSY”: Displays when a call is being received.
6. “”: Displays when the keypad lock has been activated.

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7. “SCAN”: Displays when the transceiver scans through all the channels.
B. FUNCTION AND LOCATION OF THE CONTROLS
1. “ON/OFF” Volume Control
In “OFF” position, your transceiver is off. Rotate this control clockwise to turn on your radio and
adjust the volume, until you get a comfortable listening level.
2. LCD Display
Your transceiver has a multifunctional liquid crystal display with backlight ( see “A” for detail).
3. CH ∆
∆∆
∆Button
Press CH ∆
∆∆
∆to move one channel up. Release when you reach the desired channel.
To Operate the Scan
Press and hold CH ∆
∆∆
∆or CH ∇
∇∇
∇for two seconds allows the unit to begin scanning up or down
through the channels. If a valid signal is present, the radio will stop on the active channel and
remain stopped for 4 seconds. If no button is pressed, the scan mode will then immediately
resume for the next channel after the signal disappears within 4 seconds or after 4 seconds have
elapsed.
If no signal is found on a channel, the unit will immediately continue to scan when no button is
pressed.
During scan, if CH ∆
∆∆
∆or CH ∇
∇∇
∇is pressed, the unit will exit scan mode and stop at the current
displayed channel.
In both cases, pressing PTT, CALL, and MON buttons will cause the scan to turn off and stop at
the current displayed channel. Press QUIET button during scan to stop scan and return to the

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original channel.
4. CH ∇
∇∇
∇Button
Press CH∇
∇∇
∇to move one channel down. Release when you reach the desired channel.
5. QUIET Button
Press QUIET button to enable or disable the QUIET privacy mode operation.
To determine QUIET privacy code setting, press and hold QUIET button for 2 seconds until QUIET
icon is displayed and the quiet code indicator flashes. Press CH ∆
∆∆
∆or CH∇
∇∇
∇to select the desired
code between 01 and 38. Press QUIET button once to confirm and exit the setting mode and
your radio is now in the privacy mode operation.
Note: It is recommended to select the middle range of the QUIET privacy codes. If you have
selected the front and end QUIET privacy codes, please wait 1 to 2 seconds to initiate QUIET,
i.e. Press and hold Push-To-Talk button to transmit, wait 1 to 2 seconds, and then speak in a
normal voice.
6. CALL Button
You can cause a ringer sound on all radios tuned to the same FRS channel and/or the privacy
code as your radio. To send a page, press and hold down the CALL button. At this time, the
speaker rings a bell, and the transmit icon is displayed and the outer (( )) icon flashes.
You can also lock your radio setting to avoid accidental pressing of keys by activating the keypad
lock. Press and hold MON button, then press CALL button to activate or deactivate the keypad
lock.
To Operate Lock Operation
Press and hold MON Button and press the CALL button to activate the key lock. The lock icon is
displayed.
7. Push-To-Talk Button
To talk, hold down Push-To-Talk. Speak into the microphone in a normal tone of voice when
the transmit icon is displayed. When you finish speaking, release Push-To-Talk button.
8. MON Button
Press this button to open the automatic squelch and allow background noise to be heard.
Release MON button to turn the auto-squelch back on.
9. External Microphone/Speaker Jack
Connect an optional speaker/microphone or earphone in this jack.
10. Antenna
Provides excellent reception.
11. Power Supply
Plug the cigarette lighter adapter into the car cigarette lighter jack.
C. OPERATION
1. To set the privacy code, check the function instructions.
2. Rotate the ON/OFF volume control clockwise to turn the unit on. Press the
“MON” button and adjust the volume for a normal listening level.

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3. Select the desired channel and/or QUIET privacy code.
4. Press Push-To-Talk button to transmit or CALL button to cause a page.
5. To receive, simply release Push-To-Talk button.
Note: You can only communicate with another radio that is using the same channel and/or the
same QUIET privacy code as your radio.
TECHNICAL SPECIFICATIONS
Frequency Range.................................................................…………...........….....462-467 MHz
Channels.........................................................................................……………......................14
Power supply.....................................................................….........……………..………12-13.8V
Sensitivity at 12dB Sinad...........................................................……............………….......0.5µV
Adjacent Channel Rejection.................................................……………….....…more than 45dB
Harmonic Emissions..............................................……………................…….....Less than 48dB
Dimensions
Hand Mic (HWD)….……………………………………….………60×95×32 (mm)
Base Unit…...........….................................…..…………....…….…φ95×h45 (mm)
CHANNEL FREQUENCIES
Frequency: MHz
01=462.5625 05=462.6625 09=467.5875 13=467.6875
02=462.5875 06=462.6875 10=467.6125 14=467.7125
03=462.6125 07=462.7125 11=467.6375
04=462.6375 08=467.5625 12=467.6625
QUIET PRIVACY CODES
Frequency: Hz
01=67.0 11=97.4 21=136.5 31=192.8
02=71.9 12=100.0 22=141.3 32=203.5
03=74.4 13=103.5 23=146.2 33=210.7
04=77.0 14=107.2 24=151.4 34=218.1
05=79.7 15=110.9 25=156.7 35=225.7
06=82.5 16=114.8 26=162.2 36=233.6
07=85.4 17=118.8 27=167.9 37=241.8
08=88.5 18=123.0 28=173.8 38=250.3
09=91.5 19=127.3 29=179.9
10=94.8 20=131.8 30=186.2