TRC-495 40-Channel CB Base Transceiver (210-1579) Operation Faxback Doc. # 15147 CAUTION: Do not use your CB before you connect it to an antenna. Before you start using your CB, you should know how it to use it effectively and courteously. See "CB Courtesy" and "Using 10-Codes.", below. RECEIVING TRANSMISSIONS NOTE: You must connect the microphone to your CB or it will not receive. 1. Set VOLUME to MIN. 2. To turn on the CB, press POWER to the 1 position. The CHANNEL display shows the last channel used. 3. Turn RF GAIN to HIGH (fully clockwise). 4. Turn SQUELCH to MIN (fully counterclockwise) so you can hear background noise (hiss). 5. Adjust VOLUME to a comfortable listening level. 6. Rotate CHANNEL to the right to increase the channel number, or to the left to decrease the channel number. The SIGNAL meter shows the strength of the incoming signal. 7. Slowly turn SQUELCH to the right until the background hiss disappears. NOTES: Do not set SQUELCH too far to the right, or you cannot hear weak signals. To receive very weak signals, turn SQUELCH to the left. You hear noise between transmissions, but you also hear weak signals (those not strong enough to completely break through the squelch). 8. Adjust VOLUME again to a comfortable listening level. TRANSMITTING NOTE: We recommend you try receiving before you begin transmitting. 1. Rotate CHANNEL to select a channel. 2. Hold the microphone about 3 inches from your mouth. Press and hold the microphone's talk button and speak in a normal voice. The TX POWER meter shows the strength of the transmitting signal. The microphone automatically adjusts its gain to provide the best modulation. However, speaking very loudly or very softly can still cause unwanted noise or distortion. 3. Release the talk button when you finish speaking. 4. When you are finished, turn off the power by pressing POWER to the 0 position. USING SPECIAL CONTROLS Your CB features several special controls. We suggest you learn about these controls so you can fully enjoy your CB. Using CH9 IMPORTANT: Channel 9 is reserved for motorist assistance and for reporting emergency information about accidents, hazardous road conditions, and so on. Always give emergency messages priority on Channel 9. You can instantly switch to Channel 9 at any time by pressing CH9. The display shows 9. NOTE: Pressing CH9 disables CHANNEL and SCAN. To return to normal operation, press CH9 again. Your CB returns to the channel you were previously using. Using SCAN You can use the scan function to scan for incoming signals. Press SCAN. The TRC-495 starts to scan, and the SCAN indicator lights. The CHANNEL indicator shows the scanned frequencies, then stops at the incoming signal. NOTE: If the signal is lost for about 3 seconds, the CB begins scanning again. Using NB and ANL If you encounter noise while receiving, press NB (noise blanker) or ANL (automatic noise limiter). The NB or ANL indicator lights, and the noise level should drop. NB eliminates impulse-type noise (like that produced by vehicle ignitions or engines). ANL reduces the level of continuous noise so it does not interfere with reception. If you still hear the noise, refer to "Noise Reduction" for additional information. If parts of the received signal sound choppy, press NB or ANL again (to the out position) to turn off the function. Using RF GAIN Rotate this control to adjust your CB's sensitivity when receiving. Normally, you will leave this control set to HIGH. This is useful for blocking out weak stations, while still receiving nearby stations. When the SIGNAL/TX POWER meter indicates more than half scale, it means that you are receiving a strong signal. If the signal overloads or distorts, rotate RF GAIN to the left. For weak signals, rotate RF GAIN to the right. CB COURTESY Remember these hints when using your CB: Wait for a pause in transmission before asking for a break. If you do not receive an answer after two calls to a station, let others use the channel. Try again later. Do not hold down the talk button when you are not talking. (This is called dead-keying.) Help callers with directions, information about road conditions, and any other reasonable requests. Always yield any channel for emergency transmissions. MAXIMUM RANGE The maximum range and quality of CB transmissions vary depending on these conditions: The type and quality of antenna used. The height of the antenna's mounting location - the higher the antenna, the better the signal's range. The surrounding terrain - mountains and tall buildings limit the range. Weather conditions. The number of nearby CBs operating on the same channel. Standing wave ratio (SWR) between the antenna and the CB. You can check the SWR between the CB and a mobile or base-station antenna using an SWR tester (Cat. No. 21-523, 21-524 or 21-527). Follow the instructions supplied with the SWR tester and the mobile or base- station antenna to change the SWR, if necessary. USING COMMON 10-CODES Citizen's band operators have largely adopted the 10-codes for standard questions and answers. These codes permit faster communications and better intelligibility in noisy areas. This table lists codes adopted by the Associated Public Safety Communications Officers (APCO). Code Meaning 10-1 Cannot understand your message. 10-2 Your signal is good. 10-3 Stop transmitting. 10-4 Message received and understood. 10-5 Relay information to___________. 10-6 I am busy or are you busy? 10-7 Out of service. 10-8 In service. 10-9 Repeat last message. 10-10 Negative (No). 10-11 ──────────in service. 10-12 Stand by. 10-13 Report ──────── conditions. 10-14 Information. 10-15 Message delivered. 10-16 Reply to message. 10-17 En route. 10-18 Urgent. 10-19 Contact ─────────. 10-20 What is your location? 10-21 Call ─────────by telephone. 10-22 Cancel last message. 10-23 Arrived at the scene. 10-24 Assignment complete. 10-25 Meet ──────────. 10-26 Estimated time of arrival is ──────────. 10-30 Use caution. 10-31 Pick up. 10-33 Emergency traffic. Clear the channel. 10-34 What time is it? (/all-11/20/95)