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- Radio Shack
- Transceiver
- HTX-400
- Owner's manual
Radio Shack HTX-400 Owner's manual
Summary of HTX-400
Page 1
Cat. No. 19-1104 owner’s manual please read before using this equipment. Htx-400 mini handheld 70cm fm amateur transceiver 19-1102.Fm page 1 friday, march 19, 1999 4:08 pm.
Page 2
2 features your radioshack htx-400 mini handheld 70cm fm ama- teur transceiver is compact and lightweight, making it easy to carry almost anywhere. The crystal controlled circuitry provides accurate and stable channel selection, making it an ideal choice for your amateur communications needs. Note: ...
Page 3
3 alert melody — you can set the radio to play a short, selectable melody when it transmits, and play the same melody when it re- ceives a tone encoded signal. Signal strength indicator — a graduated bar shows the relative strength of the received signal. Time-out timer — lets you set a maximum tran...
Page 4
4 manual conventions your transceiver’s buttons perform multiple functions. The abbre- viation or symbol for a function is printed on, below, or above each button. To activate certain transceiver features, you must press func (function) and another button at the same time. Those key com- bination in...
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5 contents introduction to amateur radio .................................. 7 preparation .................................................................. 9 power sources ....................................................... 9 using internal batteries .................................. 9 testing...
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6 using the receive melody alert ................... 27 special features ....................................................... 28 using the special features ................................. 28 frequency step ............................................ 29 repeater offset ............................
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7 introduction to amateur radio your transceiver is the perfect first radio for anyone entering the exciting world of amateur radio as well as a great additional trans- ceiver for the experienced amateur radio operator. Your trans- ceiver opens a door for you to the world from almost anywhere! All y...
Page 8
8 start studying for the license exams. Do not be intimidated by the word “study,” for most people can go from knowing absolutely nothing about amateur radio to passing the novice and techni- cian written exams in less than a month. The exams test your knowledge of basic radio regulations and el- em...
Page 9
9 preparation power sources you can operate your transceiver from either of two power sources: • internal batteries • vehicle battery power (using an optional dc adapter) using internal batteries your transceiver can use two aa batteries (not supplied) for pow- er. For the best performance and longe...
Page 10
10 2. Press down and slide the battery compartment cover in the direction of the arrow marked on the cover. 3. Put the batteries into the compartment and on top of the attached ribbon according to the polarity symbols (+ and –) marked inside the compartment. 4. Replace the cover and slide the lock t...
Page 11
11 using vehicle battery power you can operate the htx-400 from your vehicle’s battery using a dc adapter such as radioshack cat. No. 273-1815. Cautions: you must use a power source that supplies 9 volts dc and delivers at least 800 ma. Its center tip must be set to positive, and its plug must fit t...
Page 12
12 connecting the antenna place the threaded base socket of the supplied antenna over the antenna connector on top of the transceiver and turn the antenna clockwise to tighten it. Caution: do not overtighten the antenna 19-1102.Fm page 12 friday, march 19, 1999 4:08 pm.
Page 13
13 attaching the belt clip use a phillips screwdriver and the two supplied screws to attach the supplied belt clip to your transceiver. Do not overtighten the screws. Attaching the wrist strap attach the supplied wrist strap to the top of the belt clip, thread the strap’s small loop through the open...
Page 14
14 connecting a microphone/ speaker you can connect an external communications headset, con- sisting of a microphone and speaker, to the transceiver so you can use it privately. Lift the hinged, rubber dust cover from the mic and spk jacks on the top of the transceiver, then insert the plug of an op...
Page 15
15 a quick look at the controls vol/off – turns the radio on/off; adjusts the volume sq — sets the squelch level to block weak signals or — sets the frequency or change other values func+ — directly sets the frequency ptt (push-to-talk) button vol/off speaker microphone sq 19-1102.Fm page 15 friday,...
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16 ptt (push-to-talk) — press to transmit and to store settings in memory func+ — accesses the subaudible tone squelch frequencies func+rev — reverses the offset frequency func+ptt — reverses the send and receive frequencies func+lock — locks/unlocks all front panel buttons — turns on the backlighte...
Page 17
17 operation understanding repeaters operation through a repeater, where you transmit on one fre- quency and receive on another, is called duplex operation. Oper- ation direct to another station, where you transmit and receive on the same frequency, is called simplex operation. A repeater is a stati...
Page 18
18 notes: • if the transceiver picks up unwanted weak transmissions, rotate sq slightly clockwise to decrease the transceiver’s sensitivity to signals. The weak transmissions are blocked. • your transceiver normally tunes the range of 430.000– 458.000 mhz. (to change to the extended range, see “chan...
Page 19
19 scanning for active frequencies 1. To search for activity on a frequency, press sc. The trans- ceiver begins to scan up or down the full frequency range, and stops on active frequencies for 5 seconds. 2. To change the scan direction, press or . 3. To stop on a frequency or to stop scanning comple...
Page 20
20 locking the keypad to lock the transceiver’s keypad so you do not accidentally change a setting, press func + lock . Appears. This locks all buttons except push-to-talk, , vol , and sq . Press func + lock again to unlock the keypad. Lighting the display press to turn on the display backlight for ...
Page 21
21 2. To change the frequency, hold down c until and c flash. 3. Directly enter or press or to select the desired fre- quency. If you want to enter a repeater frequency see “understanding repeaters” on page 17. 4. Press c to store the selected frequency in memory. 5. To program the repeater offset f...
Page 22
22 4. To select a different frequency than that displayed, repeat- edly press or or use direct frequency entry. 5. To store the setting, press ptt . And the memory location stop flashing and your entry is stored. 6. Press mr to exit the memory mode. Storing a repeater offset frequency to store a rep...
Page 23
23 5. If you want to set scanning to skip the memory location, press sc , then press or so scsp on (scan skip) appears. To include the displayed location in a scan press or so scsp of appears. 6. When you finish, press sc again, then press ptt to store the setting. Scanning standard memory locations...
Page 24
24 using subaudible tone squelch your htx-400 can transmit and receive a low-level, selectable subaudible tone at the same time as it transmits (tx) or receives (rx) a regular signal. This special tone lets you listen only to oth- er units set to the same tone frequency when you use the radio in a l...
Page 25
25 subaudible tone frequencies (mhz) 67.0 114.8 186.2 69.3 118.8 189.9 71.9 123.0 192.8 74.4 127.3 196.6 77.0 131.8 199.5 79.7 136.5 203.5 82.5 141.3 206.5 85.4 146.2 210.7 88.5 151.4 218.1 91.5 156.7 225.7 94.8 159.8 229.1 97.4 162.2 233.6 100.0 167.9 241.8 103.5 173.8 250.3 107.2 179.9 254.1 110.9...
Page 26
26 reversing the offset when you turn on the repeater offset, the htx-400 uses the last offset direction you set. To change the offset direction, press func + rev . + appears in the display for a positive offset (the transmit frequency is above the receive frequency) and – appears for a negative off...
Page 27
27 using the transmit melody alert follow these steps to select a transmit melody. 1. Turn on the radio. Make sure you are not in memory mode. 2. Hold down func and press t.Set four times . Mel and a number from 1 to 5 appear. 3. Press or to display the number of the melody you want to use. Each tim...
Page 28
28 special features using the special features the transceiver has several advanced features that give you ad- ditional control and convenience while using your transceiver. To set any of the features follow these steps. For detailed infor- mation on any feature, see its section on the following pag...
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29 3. Press or to change the selected feature’s settings. 4. To change to another feature setting, repeatedly press func + or func + until you see that setting. Then repeat step 3. 5. To store all customized settings and return to the normal display, press ptt . Frequency step to change the scanning...
Page 30
30 time-out timer when you communicate using repeaters, you should keep your transmissions as brief as possible. Most repeaters have built-in timers that limit single transmissions to 3 minutes or less. You can set the transceiver to stop transmitting and sound a beep if you exceed a set time limit ...
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31 busy channel lockout this feature sets the transceiver so you cannot transmit while it is receiving a signal. With the radio’s preset value bclo of dis- played, press or to change the display to bclo on and turn the feature on. Repeat this step to change the display back to bclo of and disable th...
Page 32
32 troubleshooting if your transceiver is not working as it should and it displays an error message, these suggestions might help you eliminate the problem. If the transceiver still does not operate properly, take it to your local radioshack store for assistance. You see possible cause remedies s-sh...
Page 33
33 care and maintenance your radioshack htx-400 mini handheld 70cm fm amateur transceiver is an example of superior design and craftsmanship. The following suggestions will help you care for your transceiver so you can enjoy it for years. Keep the transceiver dry. If it gets wet, wipe it dry immedia...
Page 34
34 resetting the transceiver if the transceiver’s display locks up or does not work properly af- ter you connect power, you might need to reset the transceiver. Caution: this procedure clears all the information you have pro- grammed into the transceiver. Before you reset the transceiver, try turnin...
Page 35
35 specifications general frequency: rx .............................................................. 420–470 mhz tx ............................................................... 430–450 mhz frequency generation .............................. Pll synthesizer frequency stability .....................
Page 36
03a99 printed in korea limited one-year warranty this product is warranted by radioshack against manufacturing defects in material and workmanship under normal use for one (1) year from the date of purchase from radioshack company-owned stores and authorized ra- dioshack franchisees and dealers. Exc...