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CB Radio Controls (part 2).NB: Noise Blanker. This is a circuit built into some CBs, designed to cut out noise from things such as car engines. As FM CBs are less prone to such interference than AM ones, this control is unlikely to be of any use on such radios. NB/ANL: Combined Noise Blanker and ANL switch. On/Off: Switches the radio on or off. This is often built into the volume control. PA/CB When switched to PA (Public Address), the radio will not receive or transmit signals, but will send the sound from your microphone direct to the PA socket on the back of the radio. Power Hi/Low: Most older UK radios had a high / low power switch to switch between the standard 4Watts output and a lower 0.4Watts. The reason for this was that an old (now removed) UK CB rule stated that, if you placed your antenna over 7Metres from the ground, you had to use just 0.4Watts power. As the law was removed, so was the control. This should be left in the high power position, unless you experience problems with interference to TVs etc. PWR: See Power (above). PWR ATT: Power Attenuator - See Power (above). REF (switch): See SWR switch (below). R. Beep: Roger Beep. See Beep (above). RF Gain: Controls your receiver sensitivity - how well it picks up people further away. This will usually be set to maximum, unless you want to compare two strong signals, you are in a car tracking someone or you are getting interference from another CBer nearby. RIT: See clarifier (above). Rog: Roger Beep. See Beep (above). Squelch: Cuts out the background noise. This control is even more important with the FM CBs used across Europe, as the background noise is rather loud without this. The control should be turned to minimum then, without any signals coming in (on a quiet channel), it should be increased until the background noise just disappears, and then slightly more to stop it being triggered by noise on the channel. SWR switch: This switches the front panel meter between different functions - signal / output (s/rf), SWR meter adjust (fwd or cal) and SWR reading (swr or ref). Tone: Adjusts the tone of the incoming sound, but makes no difference to your outgoing sound. Tune: Same as clarifier (above), but usually in the form of a three position switch. Volume: Controls the level of sound from your speaker. This has no effect on your outgoing signal. |
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New CB and communications related magazine planned for August. We are looking for people with an interest in the subject to contribute information, news and other articles. We are also keen to hear from communications related organisations wanting the opportunity of a well targeted advertising campaign. We are looking for people to Contact page. | | |
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