Midland_G-7_user.pdf

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1、7. H (High) / L(Low) - shows the high or low power selection (PMR band). 8. RX - (busy channel): appears on the display when the transceiver is receiving a signal. 9. CTCSS tones - these 2 small digits indicate the selected CTCSS tone (1 - 38). 3.2 Radio Refer to this picture to identify the various

2、 parts of the device: 10. VOLUME knob - On/off switch for the device and adjusts volume of reception. 11. PTT button (push to talk) - Press this button to transmit. 12. CALL/ button - to send a call on the selected channel. If you keep it pressed for about 5 seconds, the keypad lock is activated. 13

3、. Built-in MICROPHONE - Here is where sound is picked up by the microphone. 14. Built-in SPEAKER - Here is where the speaker is housed. 15. ANTENNA - Receives and transmits radio signals. 16. SPK/MIC socket (under protective cover) - To connect to external audio devices (headphones, microphone etc.)

4、 and to the battery charger. 17. MENU button - Press this button to display the devices menu. 18. MONITOR/SCAN button- Press this button once to activate SCAN (scanning of channels). Keep the same button pressed for about 2 seconds to activate MON function. This function temporarily cuts off Squelch

5、 (for weak signals). 19. Scroll buttons / - Press these buttons to change setting within the MENU. 4. PREPARING THE TRANSCEIVER Make sure the following items are supplied in the package before you start using your transceiver: 2 transceivers; double desktop charger; wall adaptor; 2 battery packs, 80

6、0m A/h NiMH; belt clip; operational manual. If any of the above is missing or damaged contact your supplier immediately. 4.1 Battery pack recharge The supplied battery pack is 6V NiMH type and must be recharged without taking it out of the transceiver; it takes 12 -14 hours to fully recharge. To rec

7、harge the battery pack: 1. Connect the socket of the wall adaptor to a mains power socket and insert the jack of the wall adaptor into the desktop charger plug. 2. Place your transceiver into the cradle of the desktop charger. 3. When charging is complete take the transceiver out of the cradle and d

8、etach the socket of the wall adaptor from the mains. ! Do not overcharge the batteries! When these are fully charged the charging process does not stop automatically. Do not forget therefore, to remove the transceiver from the charger as soon as the batteries are charged. ! Do not try to charge alka

9、line batteries or non rechargeable batteries. Make sure that when you charge the radio, only rechargeable NI-MH batteries should be contained in the battery compartment! It is very dangerous attempting to recharge other types of batteries (for example alkaline or manganese batteries). Batteries whic

10、h are not suitable to be recharged may leak, explode or even burn and cause damage! ! Using a different battery charger other than the one specifi ed can cause damage to your device or may even cause explosions and personal injuries. ! Do not throw batteries into fi re or place them near heat as thi

11、s may cause explosions or personal injuries. Dispose of the batteries according to procedures set out by local regulations. ! Do not mix old and new batteries or batteries of different types or batteries which have been used in different manners. 4.2 Memory effect of rechargeable batteries Rechargea

12、ble NiMH (Nickel-Metal-Hydrate) batteries are affected by what is known as the “memory effect”. This phenomenon is associated with a drastic reduction of battery autonomy and is triggered if the batteries are regularly charged before being fully discharged and/or are not completely recharged. To avo

13、id the memory effect: When possible, recharge the batteries only when they are completely discharged (until the device turns itself off during normal use) Do not disconnect the battery charger before the time indicated for a full battery charge. Discharge and recharge your batteries completely at le

14、ast twice a month. In any case, the best solution for avoiding the memory effect is to use in turn two battery sets: one in use, and the other as a spare set. The memory effect can be easily eliminated by completely discharging/ charging the batteries 3 or 4 times. The memory effect should not be co

15、nfused with the normal battery life, which is 300-400 cycles of charge/discharge on average. It is completely normal for operating duty to decrease when the batteries have reached the end of their life; at this point, you will need to substitute the batteries. 4.3 Installing and removing the belt cl

16、ip With the belt clip you can easily attach the transceiver to your belt. The clip however, must be removed in order to install or change the batteries. To remove the belt clip follow the indication of picture 1. To fi x the clip back to the device slot it in the guides at the back of the transceive

17、r until it clicks into place. 4.4 Installing/removing the battery pack 4.4.a Removal 1) Remove the belt clip as explained in paragraph 4.3; 2) Open the battery compartment as shown in picture 2; 3) Remove the battery pack; 4) Replace the battery cover and fi x the belt clip. 4.4.b Installation 1) Re

18、move the belt clip as explained in paragraph 4.3; 2) Insert the battery pack into the battery compartment; 3) Replace the battery cover and fi x the belt clip. Midland G7 Two-colour and dual band PMR/LPD transceiver 1. INTRODUCTION Combing the latest technology in radio communication along with a st

19、urdy mechanical frame, the MIDLAND G7 makes the ideal and effective solution for both the professionals who need to stay in touch with colleagues (construction sites, buildings, hotels, trade fairs, shows) or with leisure users that just want to keep up with friends and family. Its robust frame, eas

20、e of use and simple design mean that it is ideal for use in any activity. The MIDLAND G7 is extremely practical and operates on both PMR446 and LPD bands (please see chart in user guide for restrictions on use). The MIDLAND G7 incorporates all the functions that you would expect to see on the latest

21、 and most advanced two way radio transceivers and guarantees reliability and maximum effi ciency. Other key features include an LCD backlit display, a Vibrating call alert feature for use in high-noise areas and an auto power save function which reduces battery consumption by up to 50%. All of the f

22、eatures on this outstanding radio are easily accessible thanks to the centrally mounted controls. Coverage (referred to PMR frequency band) The maximum range is obtained during use in an open space. The only limitation to maximum possible range are environmental factors such as blockage caused by tr

23、ees, buildings, or other obstructions. Inside a car or a metallic constructions, the range can be reduced. channels to higher ones or vice versa) and therefore to skip communications which are of no interest. Press briefl y the button MON/SCAN 18 to start scanning. If you want to stop it, press agai

24、n MON/SCAN 18. Your transceiver will go back to the channel from which the scanning originally started. 5.6 Display backlight If there is insuffi cient light to read the display you can press the MENU 17 button to switch the display back light on for about 5 seconds. Switching the backlight on the d

25、isplay adds an additional drain on the batteries. Try to make a moderate use of this. 5.7 Keypad lock Keep pressed CALL/ 12 for about 5 seconds and 3 will be displayed as confi rmation. Only PTT 11 and CALL/ 12 remain active. To disable this function, keep pressed again CALL/ 12 for 5 seconds approx

26、. 5.8 Power Save The battery power saving feature enables a reduction in the consumption of up to 50%; power saving comes on automatically when the transceiver does not receive any signal for more than 7 seconds. When the batteries are discharged, the icon 5 appears on the display: replace the batte

27、ries or recharge the battery pack. 6.MENU button 6.1 Channel selection Press once the MENU 17 button. The number of the channel 4 will start fl ashing on the display. Press the scroll buttons / 19 to scroll up or down the PMR and then LPD channels till you select the desired channel. Press the PTT 1

28、1 button to confi rm, or wait for 5 seconds. Refer to the table of frequencies of Chapter 9. 6.2 CTCSS tones selection MIDLAND G7 can receive in two modes: a) Open traffi c: in this case you will hear any communication transmitted on the selected channel; b) Group mode CTCSS: CTCSS tones are access

29、keys that allow you to receive only messages coming from parties using the same channel and code. The speaker will remain muted until the correct CTCSS tone is received. To activate 1 of 38 different CTCSS tones in RX and TX 1. Turn on the radio. 2. Select the desired channel. 3. Press twice MENU 17

30、 until the Display shows the channel with the CTCSS tone 9 fl ashing on the right (“of” default condition). 4. Select the desired CTCSS tone by pushing the / 19 controls. 5. To confi rm the setting, press the PTT 11 key or wait for approximately 5 seconds. To deactivate CTCSS tones If you want to op

31、erate with no CTCSS code: 1. Press twice the MENU 17 key until the display shows the desired channel and the CTCSS 9 tone blinking on the right. 2. Select “of” with / 19 buttons. 6.3 Choosing high or low transmission power (PMR band) Batteries are drained more quickly during transmission. In order t

32、o extend the battery life you can select the low power when transmitting over short distances. Procedure: 1) Press the MENU 17 button for 3 times and Pr will be displayed. 2) Select L 7 using the scroll buttons / 19. 3) Press PTT 11 to confi rm, or wait for 5 seconds. If you want to transmit a longe

33、r distance repeat the above procedure to select the high power. At step 2 select H 7. When the batteries are in good conditions, high power is 500mW, whereas low power is 10mW. A low battery level during transmission will reduce the performance of your device. 6.4 VOX function MIDLAND G7 enables han

34、ds free conversations through VOX function. The sensitivity of VOX function can be adjusted in 2 different levels. You can enable VOX function with or without accessories. To activate VOX function press the MENU 17 button 4 times in the PMR band and VOX 1 will appear on the display. Use the scroll /

35、 19 buttons to select: OFF: Disabled; 1: 1st Level (low sensitivity); 2: 2nd Level (high sensitivity); Press PTT 11 to confi rm or wait for 5 seconds. To disable the VOX function follow the instructions above and select option oF. 6.5 Vibra-Call function MIDLAND G7 is equipped with the “Vibra-Call”

36、feature, which provides a silent alert for incoming calls. To activate it, follow these steps: 1. In the PMR band, press the MENU 17 button for 5 times, until the display shows 6; 2. Use the / 19 buttons to disable or enable this feature (on: enables, oF:disables); 3. Push PTT 11 to confi rm or wait

37、 for 5 seconds. Everytime MIDLAND G7 receives a call, it will vibrate. When the Vibracall function is enabled, the call tone wont be heard. 6.6 ROGER BEEP (End transmission tone) Every time you end transmission (PTT 11 released), MIDLAND G7 gives out a sound that indicates to the other party that s/

38、he can start talking. This function is factory disabled. To activate it: 1) Press six times the MENU 17 button in the PMR band until the display shows “rb oF”; 2) Using the scroll buttons / 19 select “on” and “rb on” will be displayed; 3) To confi rm the roger beep activation, press PTT 11 button or

39、 wait for 5 seconds. 6.7 CALL function MIDLAND G7 can send 5 different call tones. To send this audio signal to other users, press the CALL/ 12 key. To select the call tones: 1. Push the MENU 17 button 7 times in the PMR band, until the display shows “CA 1”. 2. By pushing / 19 you will hear the 5 pr

40、e-set melodies. 3. Confi rm by pressing the PTT 11 key or wait for 5 seconds. Now, each time your MIDLAND G7 sends out a tone call, it will beep with the selected melody. If the Vibracall function is activated (See par. 6.5), the call tone wont be heard. 6.8 Dual Watch function This function allows

41、the monitoring of 2 channels of your choice. Procedure: 1. Select one of the 2 channels you want to monitor. 2. Press 9 times the MENU 17 button in the PMR band until the display shows “TX oF RX”. 3. With the / 19 button select the second channel to monitor. 4. Push the PTT 11 key or wait for 5 seco

42、nds for confi rmation. To disable the function, press the MON/SCAN 18 button. 6.9 Keypad beep To deactivate the keypad beep, follow these steps: 1. Press for 8 times the MENU 17 button in the PMR band, until “bP on” is displayed. 2. Use the / 19 buttons until the display shows “bP of”. 3. Confi rm b

43、y pushing the PTT 11 or wait for 5 seconds. Now you wont hear any beep at the pressure of any button. 7. TROUBLESHOOTING Your MIDLAND G7 is designed to provide you with years of optimal performance. If for some reason problems arise, refer to this chapter before contacting a service centre in your r

44、egion. 7.1 Reset If your transceiver experiences a logical malfunction (improper symbols on the display, blocking of functions, etc.), it may not be experiencing a true failure, but rather a problem caused by external factors. For example, it may have an incorrect setting brought on by a noise or sp

45、ikes in the electrical system during battery recharging. In such cases, you can reset the transceiver to its factory-programmed settings, by resetting all parameters: 1) Turn off the transceiver 2) Remove the batteries for about 60 seconds (Par.4.4) Before you go ahead with the reset, we recommend t

46、hat you take note of all the setting you have carried out as they will be deleted. 8 TECHNICAL SPECIFICATIONS Channels .18 PMR, 169 LPD Frequency range . 446.00625 446.09375MHz (PMR) . 433.075 434.775MHz (LPD) Channel spacing .12.5 KHz (PMR); 25 KHz (LPD) Power supply . 6+/- 10% Vdc Temperature .from -20 to +55C Dimensions (w/o batteries) .58 (L)x 122 (H)x34 (D) mm Weight (w/o batteries) .123gr Duty cycle .TX 5%, RX 5%, stand-by 90% 8.1 Transmitter Output power . 10 or 500 mW (Selectable) Modulation .