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Midland Radio SP-420 - page 1
User’s Guide SP-400 Series Portable 4/16 Channel VHF-FM Portable Transceiver 4/16 Channel UHF-FM Portable Transceiver www.midlandradio.com ...
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Midland Radio SP-420 - page 2
SP-400 Series User’s Guide 2 © 2005, Midland Radio Corporation FCC RF EXPOSURE COMPLIANCE REQUIREMENTS FOR OCCUPATIONAL USE ONLY The Federal Communicati ons Commission (FCC), within its action in General Docket 93-62, November 7, 19 97, has adopted a safety standard for hum an expo sure to Radio Frequency (RF) elec tromag netic energy emitted by ...
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Midland Radio SP-420 - page 3
SP-400 Series User’s Guide Contents Conventions and Symbols in this Book ................................... 4 Disclaimer ................................................................................ 5 Safety ....................................................................................... 5 Introduction ................................. ...
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Midland Radio SP-420 - page 4
SP-400 Series User’s Guide Sending a 2-tone/selective call or emerg ency call ............. 20 Scanning channels ............................................................. 21 Advanced Operations ............................................................ 24 Operating hands-free ......................................................... 24 Usin ...
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Midland Radio SP-420 - page 5
SP-400 Series User’s Guide Disclaimer Midland Radio Corporation is committed to continuo us quality improvements, for this rea son spe cifications may change without prior notice. Every effort has been made to ensure that the information in this document is complete, accurate, and up-to-date. Midland assumes no responsibility for the re sults of ...
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Midland Radio SP-420 - page 6
SP-400 Series User’s Guide Do not operate the radio near unshiel ded electric al blasting caps or in an explosive atmosphere . Do not transmit without the antenna attached to the radio . Though designed for protection a gain st damage, damage to the transmitter may occur. Respect the env ironmental conditions . The radio is designed t ...
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Midland Radio SP-420 - page 7
SP-400 Series User’s Guide Introduction Congratulations! By choosi ng the Midland SP-400 series, you have selected a professi o nal grade portable radio. Its rugged design will provide years of reli able service and its sophisti cated software allows many cust omizable options. Radio models There are four models in the SP-400 series po rtable rad ...
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Midland Radio SP-420 - page 8
SP-400 Series User’s Guide 47 CTCSS tones and 104 DCS codes p rogrammable per channel. 5 2-tone decode – your radio may be programm ed to respond only when paged with a two-to ne se quence. Two sequences selectable per channel and up to 15 different sequences progra mmable p er radio. 5 VOX (voice operated tra nsmit) – allows hands-f ree oper ...
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Midland Radio SP-420 - page 9
SP-400 Series User’s Guide Radio Controls Please read this section to fa miliarize yourself with the transceiver’s controls. 2 3 1 7 4 6 8 5 9 © 2005, Midland Radio Corporation 9 ...
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Midland Radio SP-420 - page 10
SP-400 Series User’s Guide Top [1] Channel selector knob. Rotate this knob to select the operating channel. [2] Power ON/OFF knob. Rotate this knob clockwise to turn the transce iver on (cou ntercl ockwis e to turn off). [3] Status LED . Tri-color LED lights and flashes at different rates to indicate operating conditions. Front [4] Speaker . Rece ...
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Midland Radio SP-420 - page 11
SP-400 Series User’s Guide [8] PTT (Push to talk) button. The PTT button must be pressed while you speak into the micropho ne. Release the PTT button to receive transmissions from other radio s. [9] Lower function (scan) button. The lower function button performs two functions. Th e prima ry function is activated by a brief button press (press an ...
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Midland Radio SP-420 - page 12
SP-400 Series User’s Guide Setup Unpacking The following items are supplied in the standard package: 5 One transceiver (SP-410, SP-420, SP-430 or SP-4 40) 5 One battery pack (18-B02) 5 One belt clip (81-BC1) 5 One plastic accessory dust cover 5 One rubber easy access d ust cover 5 One user’s manual If something is missing please promptly advise ...
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Midland Radio SP-420 - page 13
SP-400 Series User’s Guide Installing and removing the battery pack To install the battery pack: Hold the transceiver’s body with one hand and the b a ttery pack with the other. 1. Slide the bottom of the battery pack into the s on the bottom of the transceiver. lots 2. Gently push the top of the battery pack toward the transceiver until a clic ...
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Midland Radio SP-420 - page 14
SP-400 Series User’s Guide To install the belt clip onto the battery pack’ s body: 1. Slide the clip into the appropriate guides located on the back of the battery until it firmly locks. To remove the belt clip: 2. Gently lift the belt clip release. 3. While lifting the belt clip release slide the belt clip off the battery. Charging the battery ...
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Midland Radio SP-420 - page 15
SP-400 Series User’s Guide contacts of the battery pack must make contact with the three contacts inside the cradle). The LED indicator will glow red indicating the battery is charging. 5. The rapid charger will fully charge the 1300 mAH NiMH battery in approximately 1.5 hours. The rapid charger will change to a green LED and swit ch to a trickle ...
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Midland Radio SP-420 - page 16
SP-400 Series User’s Guide Basic Operation This section describes ma ny of the standard fun ctions available on your SP-400 series radi o. Many aspe cts of the radio can be changed or customized to suit the req uirements, so not all functions may be available or operate a s de scribe d. Due to the programming options of the radio, certain fun ...
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Midland Radio SP-420 - page 17
SP-400 Series User’s Guide call operation. The following para graphs describe these modes of operation. Ask your dealer or comm unications coordinator if you have questions on how your radio ha s bee n programmed to operate. Carrier squelch operation A signal that matches the programmed receive frequency will be heard if it is of sufficient stren ...
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Midland Radio SP-420 - page 18
SP-400 Series User’s Guide 2-tone/selective call operation 2-tone or selective call signaling allo ws i ndividual or group calls to be made to your radio. The radio may have been progra mmed to mute all receive signals until a 2-tone or selective call signal has been decoded. When the programm ed 2-tone or selective call signal is decoded, the st ...
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Midland Radio SP-420 - page 19
SP-400 Series User’s Guide released within two seconds the monitor function will deactivate when released. If the upper function button is hel d pre ssed for more than two seconds the monitor function will latch on. Press and release the upper function button ag ain to deactivate the latched monitor function. When the monitor function is acti ...
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Midland Radio SP-420 - page 20
SP-400 Series User’s Guide The radio might be progra mm ed with a timeout timer which will automatically end your transm issi on after a preset time. In this case re lease PTT an d wait for a few seconds. The radio transmitter will be enabled again after a few seconds. Ask your dealer or com munications coordinator for further detai ls. T ...
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Midland Radio SP-420 - page 21
SP-400 Series User’s Guide If a 2-tone or selective Call 1 or Call 2 has be en assigned for the selected channel, it may be sent by pressi ng the PTT button then pressing the upper (Call 1) or lowe r (Call 2) function button. If your transceiver has been programme d to send an emergency call for the selected chann el, it may be sent by pressing t ...
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Midland Radio SP-420 - page 22
SP-400 Series User’s Guide customize the scan options for your particular situatio n, so the following paragraphs detail the available options. Busy channel scan If no priority channel has been program med by your dealer or communications coordinator, all ch annels in your scan list will be checked for activity, with no preference given to any ch ...
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Midland Radio SP-420 - page 23
SP-400 Series User’s Guide Transmitting while in scan mode If PTT is pressed while the radio is in scan mode, your dealer or communications coo rdinator may have programmed one of the following options for the transmit chann el: 1. When PTT is pressed, the radio will generate an e rror beep because your dealer or communication s co ordinator has ...
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Midland Radio SP-420 - page 24
SP-400 Series User’s Guide Advanced Operations Operating hands-free VOX (voice operated transmit) is a method that allows the transceiver to automatically begin transm itting when it detects sufficient audio from an optional head set microphone. Correct VOX operation generally requires spe cific headset microphone circuitry, and not all headsets ...
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Midland Radio SP-420 - page 25
SP-400 Series User’s Guide Selecting VOX sensitivity When VOX is activated you may toggle between low and high VOX sensitivity by pressing the lower, then upper function buttons, and releasing both within two se con ds. A high beep will sound when high sensitivity is selected and a lo w beep will sound when low sensitivity is selected. Using the ...
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Midland Radio SP-420 - page 26
SP-400 Series User’s Guide If only two channels remai n in the scan list, it is not possible to delete either of them. When the radio is turned off (not when scan i s turned off) the programmed default scan list will be restored. Scan list edit is only available when sca n is not turned on. To add or remove the current channel from th ...
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Midland Radio SP-420 - page 27
SP-400 Series User’s Guide To avoid damaging the po w er cable of the battery charger, do not put anything on it or place it where it will be walked on. Do not use the charger if it received a strong shoc k, has been dropped or it appears damaged. Con tact your dealer or communications coordinator for a replacement charger. Never try ...
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Midland Radio SP-420 - page 28
SP-400 Series User’s Guide The battery pack must be ch arged prior to use. To charge the battery pack you should set up the charger and in sert the radio (or battery) as follows: 1. Plug the AC adapter into a grounded AC power o utlet which supplies the specified input voltage for the AC adapte r. 2. Connect the DC plug on the AC adapter to the m ...
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Midland Radio SP-420 - page 29
SP-400 Series User’s Guide Memory effect The NiMH (Nickel Metal Hydride) battery pack is made with a more advanced technolo g y than a NiCd (Nickel Cadmium) battery. For this reason it is virtually free of what is called “memory effect”, which affects NiCd bat teries. Me mory effect causes a reduction in the battery’s cap acity. However mem ...
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Midland Radio SP-420 - page 30
SP-400 Series User’s Guide 5. Fully charge the battery and chec k the b attery capacity. If you believe some memory effect still exists go back to step 1. If the battery capacity does not improve after performing steps 1-5 three times, your battery pack is faulty or has reached the end of it’s life. Cleaning your radio Wipe the radio with a ...
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Midland Radio SP-420 - page 31
SP-400 Series User’s Guide 3. Any accessory should be of high quality suitabl e for professional use. ! Please do not connect any accessory if you are unsure it meets the requirements listed. You could damage your radio. Please consult your deale r or com munications supplier for compatible accessories for you r SP-400 serie s radio. Recommen ...
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Midland Radio SP-420 - page 32
SP-400 Series User’s Guide Quick Reference Controls function table Control Operation Function On/off knob Turn clockwise past detent Turns the radio on On/off knob Turned further clockwis e Increases the speaker volume Channel knob Rotated while scan is off Selects channel of operation Channel knob Rotated while scanning Ma y select the scan tran ...
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Midland Radio SP-420 - page 33
SP-400 Series User’s Guide Status LED table Indication Status None while PTT pressed (see also Activating VOX) Timeout timer or penalty active Steady red while PTT pressed Transmitting Continuous red flash while PTT pressed No TX, very low battery voltage Single red flash in standby mode (repeated every five seconds) Low battery voltage Steady gr ...
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Midland Radio SP-420 - page 34
SP-400 Series User’s Guide Specifications General specificat ions SP-410 / 430 (VHF) SP-420 / 440 (UHF) Frequency range 148-174 MHz 440-470 MHz FCC ID number MMA80151 MMASP-440 FCC type acceptance Part 90 Part 90, 95 Maximum number of channels 4/16 4/16 Channel spacing 12.5/25 KHz 12.5/25 KHz Channel stepping 5/6.25/7.5 KHz 5/6.25 KHz CTCSS/DCS p ...
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Midland Radio SP-420 - page 35
SP-400 Series User’s Guide Warranty Statement Midland Radio Corporation (herein, Mi dland) warrants each new radio product manufactured or supplied by it to be free from defects in material and workmanship under normal use and service for a pe riod listed below, pr ovided that the user h as complied with th e requirements stated herein. The Warra ...
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Midland Radio SP-420 - page 36
This device complies with Part 15 of the FCC Rules. Operation is subject to the condi tion that this device does not cause harmf ul interference. This radio operates in FCC regulated freque ncy bands. All radi os must be licensed by the FCC before use. Beca use this radio contains a transmitter, Fe deral law prohibits unauthorized use or ad ...
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