INSTALL THE BATTERIES Your GMRS540 radio uses 3 AA Alkaline batteriesfor power. We recommend using high quality alkalinebatteries.To install the batteries: 1) Make sure your radio is OFF.2) Remove the battery compartment door by pressing the tab at the bottom of the door allowing the door to be removed. 3) Install 3 AA Alkaline batteries (not included) into the battery compartment. Be certain to follow the+ and - symbols in the compartment. Installingthe batteries incorrectly will prevent the unit fromoperating. 4) Optional: Your GMRS540 radio can be powered using an optional NiMH battery pack specificallydesigned for this model. Remove the alkaline batteries and install the battery pack by insertingit into the battery compartment. Follow theinstructions found with the NiMH accessory. 5) Replace the battery compartment door by pressing the tab and snapping it into place. This unit has a battery level meter on the display to indicate the status of the batteries. When the batteries in the unit are low, the battery meter icon will flash and the unit will emit a low batterytone. Replace the batteries immediately or if you areusing the optional NiMH battery pack, you mustrecharge the battery in order to continue using theradio.Warning! To avoid the risk of personal injury or property damage from fire or electrical shock, onlyuse the Uniden accessories specifically designatedfor this product. Congratulations on your purchase of the UnidenGMRS540 (General Mobile Radio Service) radio.This product is a lightweight, palm-sized radio. Use itat sporting events to stay in contact with family andfriends, hiking, skiing, outdoors, or in a neighborhoodwatch for vital communication. This compact, state-of-the-art device is equipped with many features. OPTIONAL ACCESSORIES Your package contains the GMRS540 radio, this reference guide, and a product registration card. Youwill need to purchase 3 AA Alkaline batteries in orderto operate the unit.The following optional accessoriesmay be purchased from your participating Unidendealer or call 1-800-554-3988 or visit us on the webat www.uniden.com. Use only Uniden accessories. • Earset Mic w/ PTT - #HS2468• Vox Headset Mic - #HSV2469• NiMH Battery Pack - #BP524• Drop in Charger - #RC5248 Adjusting the Sound (Key Beeps) Your GMRS540 radio emits a beep each time one of the keys are pressed or a Call Tone is generated.To turn this sound OFF, press menu/select while turning on the radio. Repeat this step to turn thesound ON. Navigating through the Menu To access the advanced features of the GMRS540,your radio has a Menu function. 1) To enter the Menu, press the menu/select key for 1 second. 2) Additional presses of the menu/select key will advance you through the Menu until exiting to"normal" operating mode. 3) Other methods of exiting the menu function are:a. Press PTT (Press To Talk). b. Wait 10 seconds until the unit automatically returns to "normal" mode. THANK YOU FOR PURCHASING A UNIDEN PRODUCT BATTERY LEVEL AND LOW BATTERY ALERT Talking on Your Radio To talk to others using the radio: 1) Press and hold the PTT button and speak in a clear, normal voice about 2-3 inchesaway from the microphone. While you aretransmitting the transmit icon TT XX will be shown on the display. To avoid cutting off the first part of your transmission, pauseslightly after pressing the PTT button before you start talking. 2) When you are finished speaking, release the PTT button. You can now receive incoming calls. While receiving, the receive icon RR XX will be shown on the display. Transmitting a Call Alert Tone Your GMRS540 radio is equipped with 5selectable call tones that will be transmittedwhen the call key is pressed. To select a call tone: 1) Enter the Menu. Advance through the menu until the CC AA LL LL icon on the display is shown. The current call tonenumber ( 11 - 55 ) will be indicated. 2) Press the s or t keys to increase or decrease the number to the desired calltone. Each tone will be heard throughthe speaker. 3) Exit the Menu. To transmit the selected call alert tone,press the call key. The selected tone will automatically be transmitted for a fixedlength of time. *Range may vary depending on environmental and/or topographical conditions. Channel Scan Feature Your GMRS540 radio has a channel scan feature that allows you to easily scan all 22 channels. When an active channel isdetected, the unit will pause on that channel until the channel is clear. Then after a 4 second delay, the unit will continue scanning. Pressing PTT while the scan is paused on a channel will allow you to transmit on that channel.To turn ON channel scanning:Press and hold either the s or t key until the SS CC AA NN icon on the display is shown. The channel number on the displaywill rapidly cycle through the channels.To turn OFF channel scanning:Press and release either the s or t key. • 5 Selectable Call Tone Alert• 8 GMRS/14 FRS Channels• Battery Recharge Circuitry • Internal VOX Circuitry• Channel Monitor • Headset Jack• 38 CTCSS Codes• 7 NOAA Emergency/Weather Channels• Optional NiMH Battery Pack and Charger • Extended Long Range*• Battery Level Meter• Backlit LCD Display• Channel Scan • Keypad Lock• Weather Alert GMRS540 Turning the Radio On and Adjusting the Volume1) Rotate the on/off/volume control counter clockwise to turn the unit ON and increase the speaker volume. 2) Rotate the on/off/volume control clockwise to decrease the speaker volume and turn the unit OFF. USING THE RADIO In order to get the most out of your new radio, readthis reference guide completely before attempting tooperate the unit. Choosing a CTCSS Code Each of the channels 1-22 may have any one ofthe codes 0-38 selected. Code "0" indicates no CTCSS code selected and your radio can receivea signal regardless of the code settings of thetransmitting radio. 1) Enter the Menu. Advance through the Menu until the CTCSS code on the LCD is flashing. 2) Press the s or t key to increase or decrease the code number displayed. 3) Ex…

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Block Diagram

CPU IF PLL SAW FILTER IFLPFHPF Squelch Filter RΣ LCD KEYPAD MATRIX VCO T/R Loop Filter RX CNTL HPFLPF MIC LIMITER PRE-EMPHASIS DEVIATION ADJUST PWR AMP PRE AMP BUF 460~470MHz 10.7MHz 10.250MHz 450KHz TCXO 10.250MHz DE-EMPHASIS RX MUTE POWER CNTRL +4.5 TX RX 4.5V AAx3 GMRS540 - System Block Diagram TriSquare CommunicationsTriSquare Communications Confidential Proprietary LPF CTCSS LPF CTCSS VOL CNTL BACKLIGHT PTT MON PAGE MENU UP DOWN CALL TONE SQUELCH IN TX CNTL RX CNTL VCO PWR CNTL T/R TX LPF 470MHz LNA TX CNTL T/R WX VCO Loop Filter WX CNTL

Parts List/Tune Up Info

TRANSMITTER TUNE-UP AND ALIGNMENT GMRS540 FCC ID: O9GGMRS540 1. Frequency Setting A. Connect a frequency counter or communications service monitor capable of at least five watt RF. B. Press the PTT switch. C. Adjust CT400 trimmer capacitor such that the output frequency is equal to the channel frequency with a maximum error of +/- 300 Hz. CT400 is located to the left of the PTT button below the crystal unit. 2. Deviation Adjustment A. Connect an audio generator to the microphone test terminals. The audio frequency should be set at 1KHz with a level of 80mv. B. Connect an FM deviation meter or communications service monitor to the antenna connector. Set the monitor to read peak deviation. C. Press the PTT switch. D. Adjust RV230 for +/- 2.4 KHz deviation. RV230 is located to the left of the VCO shield can.

Schematics

GMRS540_SCH_XA1.sch-1 - Fri Feb 01 19:03:46 2002

Test Report

A. INTRODUCTION The following certification data are submitted in connection with this request for type certification of the GMRS540 transceiver in accordance with Section 2, of FCC Rules. The GMRS540 is a hand-held, battery operated, UHF, frequency modulated, transceiver intended for voice communications applications under Part 95 GMRS (channels 1-7 or 15-22)* or Part 95 FRS (channels 8-14)*. *See Appendix A for frequency assignment. 1. The unit’s antenna meets 95.647, (i.e. is integral to the transmitter). 2. Except for power, the technical parameters for operating on all the channels (both FRS and GMRS) are the same as those for FRS, (i.e. 12.5 kHz bandwidth, 2.5 ppm frequency tolerance, maximum 2.5 kHz deviation, etc). 3. A notice is included in the user instructions that clearly informs the consumer (buyer/owner) when the radio is transmitting on GMRS frequencies, that operation on GMRS frequencies requires an FCC license and such operation is subject to additional rules specified in 47 CFR Part 95. B. GENERAL INFORMATION REQUIRED FOR TYPE CERTIFICATION (Section 2.1033 of the Rules) 1. Name of applicant: Trisquare Communications 2. Identification of equipment: FCC ID: O9GGMRS540 a. The equipment identification label is submitted as a separate exhibit. b. Photographs of the equipment are submitted as separate exhibits. 3. Quantity production is planned. 4. Technical description: a. 11k0F3E emission (FRS and GMRS) b. Frequency range: 462.5500-467.7125 MHz. c. Operating power ERP(d): FRS 0.49 W GMRS 0.56 W 2 B. GENERAL INFORMATION (Cont.) d. Maximum power permitted under FCC Part 95 (interstitial) is 5 watts ERP. The GMRS540 fully complied with that power limitation. e. The dc voltage and dc currents at final amplifier: GMRS FRS Collector voltage: 4.4 4.4 Vdc Collector current: 0.51 0.47 A f. Function of each active semiconductor device: See Appendix 1. g. Complete circuit diagram is submitted as a separate exhibit. h. A draft instruction book is submitted as a separate exhibit. i. The transmitter tune-up procedure is submitted as a separate exhibit. j. A description of circuits for stabilizing frequency is included in Appendix 2. k. A description of circuits and devices employed for suppression of spurious radiation and for limiting modulation is included in Appendix 3. l. Not applicable. 5. Data for 2.1046 through 2.1057 follow this section. C. RF POWER OUTPUT (Section 2.1046 of the Rules) ERP(d) by substitution: FRS 0.49 W GMRS 0.56 W D. MODULATION CHARACTERISTICS (Section 2.1047) 1. A curve showing frequency response of the transmitter is shown in Figure 1. Reference level was audio signal output from a Boonton 8220 modulation meter with one kHz deviation. Audio output was measured with an Audio Precision System One TRMS voltmeter and tracking generator. 2. Modulation limiting curves are shown in Figure 2, using a Boonton 8220 modulation meter. Signal level was established with an Audio Precision System One. The curves show compliance with Section 2.1047 and 95.633(b). 3 D. MODULATION CHARACTERISTICS (Cont.) 3. Figure 3 is a graph of the post-limiter low pass filter which meets the requirements of paragraph 95.633(b) in providing a roll-off of 60Logf/3 dB where f is audio frequency in kHz. Measurements were made following EIA RS-152B with an Audio Precision System One on the Boonton 8220 modulation meter audio output. 4. Occupied_Bandwidth (Section 2.1047 and 95.629(a) of the Rules) Figure 4a is a plot of the sideband envelope of the transmitter output taken with a Tektronix 494P spectrum analyzer on GMRS Channel 1. Modulation corresponded to conditions of 2.1049(c)(1) and consisted of a 2500 Hz tone at an input level 16 dB greater than that necessary to produce 50% modulation at 2595 Hz, the frequency of maximum response. Figure 4b is a plot under the same conditions for FRS Channel 8. The plots are within the limits imposed by Section 2.1049 and 95.635(b)(1)(3)(7)for frequency modulation. The horizontal scale (frequency) is 10 kHz per division and the vertical scale (amplitude) is a logarithmic presentation equal to 10 dB per division. 5. Emission Designator Calculation: (2D + 2F) 2x2.5 + 2x3.0 = 11k0F3E 4 FIGURE 1 MODULATION FREQUENCY RESPONSE MODULATION FREQUENCY RESPONSE FCC ID: O9GGMRS540 FIGURE 1 5 FIGURE 2 AUDIO LIMITER CHARACTERISTICS AUDIO LIMITER CHARACTERISTICS FCC ID: O9GGMRS540 FIGURE 2 6 FIGURE 3 AUDIO LOW PASS FILTER RESPONSE AUDIO LOW PASS FILTER RESPONSE FCC ID: O9GGMRS540 FIGURE 3 7 FIGURE 4a OCCUPIED BANDWIDTH ATTENUATION IN dB BELOW MEAN OUTPUT POWER Required On any frequency more than 50% up to and including 100% of the 25 authorized bandwidth, 20 kHz (10-20 kHz) On any frequency more than 100%, up to and including 250% of the 35 authorized bandwidth (20-50 kHz) On any frequency removed from the assigned frequency by more 43+10LogP = 40 than 250% of the authorized (P = 0.56 W) bandwidth (over 50 kHz) OCCUPIED BANDWIDTH FCC ID: O9GGMRS540 FIGURE 4a, (GMRS) 8 FIGURE 4b OCCUPIED BANDWIDTH ATTENUATION IN dB BELOW MEAN OUTPUT POWER Required On any frequency more than 50% up to and including 100% of the 25 authorized bandwidth, 20 kHz (10-20 kHz) On any frequency more than 100%, up to and including 250% of the 35 authorized bandwidth (20-50 kHz) On any frequency removed from the assigned frequency by more 43+10LogP = 40 than 250% of the authorized (P = 0.49 W) bandwidth (over 50 kHz) OCCUPIED BANDWIDTH FCC ID: O9GGMRS540 FIGURE 4b, (FRS) 9 E. SPURIOUS EMISSIONS AT THE ANTENNA TERMINALS Not Applicable, integral antenna. F. MEASUREMENTS OF SPURIOUS RADIATION (Section 2.1053, 95.635(b)(7) of the Rules) Measurement of radiated spurious emissions from the GMRS540 were made by substitution with a Tektronix 494P spectrum analyzer using Singer DM-105A calibrated test antennae for the measurements to l GHz, Polarad CA-L, CA-S, CA-M and/or EMCO 3115. The transmitter was located in an OATS 3 meters from the test antenna. Supply voltage was a power supply with a terminal voltag…

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