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If a busy GS  channel is found, the receiver will 

'lock' onto it and will remain there for as long as 

the channel is busy, and for 5 seconds after the 

transmission  ceases, AS  LONG AS  THERE 

ARE  NO  SIGNALS  ON  THE  PRIORITY 

CHANNEL.  During  this  time,  the  receiver  will 

continue  to  check  the  Priority  channel  for 

signals every 2 seconds, resulting in a series of 

small  'breaks'  in  the  reception  of  the  'locked' 

channel. If no signals are heard on the locked 

channel after 5 seconds, the radio will resume 

scanning.

If,  while  locked  on  a  GS  channel,  a  signal 

appears  on  the  Priority  channel,  the  receiver 

will  switch  straight  to  the  Priority  channel  and 

will give 3 short beeps. This is to warn you that 

the  channel  you  are 

now

  listening  to  has 

changed  from  the  GS  channel  you 

were

 

listening  to  just  a  few  moments  earlier.  The 

receiver  will  now    continue  to  monitor  the 

Priority channel for a long as it is busy. During 

this  time  you  can  transmit  on  the  Priority 

channel in the usual way. However, if there has 

been  no  activity  on  the  Priority  channel  for  5 

seconds (i.e.  no signals are being received and 

you are not transmitting), the radio will resume 

scanning the other channels.

  To skip over a busy GS or Priority channel 

and resume scanning, briefly press the 

CALL

 

button (on the microphone). 

  To  talk  on  the  Priority  channel,  even  while 

scanning,  press  the 

PTT

  switch. The  radio 

will  jump  to  the  Priority  channel  and  will 

remain  there  for  as  long  as  the  channel  is 

active, and for 5 seconds after the channel 

becomes  clear.  During  this  time  you  may 

converse  normally  on  the  channel  even 

though  the  Scan  function  is  still  selected. 

After  the  channel  has  been  inactive  for  5 

seconds, the radio will resume scanning.

  To manually hold a busy GS channel, press 

SCAN

. The  radio  will  exit  the  Scan  mode 

and will remain on the busy GS channel.

NOTE: You will no longer be monitoring the 

Priority channel because the receiver is no 

longer in the Scan mode.

  To cancel the Scan mode, press 

SCAN

If  the  radio  was  scanning,  it  will  exit  Scan 

and return to the Priority channel. 

If the radio was stopped on a busy channel, 

it will exit Scan and remain on that channel.

CHECkING WHICH CHANNELS          

ARE IN MEMORY

The  following  method  can  be  used  to  identify 

which channels are stored in memory.

1.  Press 

OS/GS

  to  select  the  required  Scan 

mode.

2.  Turn  the  Squelch  control  fully  counter-

clockwise so that the receiver noise is heard.

3. Press 

SCAN

. The TX4200 will begin scanning 

but  will  lock  onto  the  first  Scan  channel  in 

the memory.

4. Briefly press the 

CALL

 button to reveal the 

next  Scan  channel  in  memory.  In  this  way 

you can step through all channels stored in 

the memory.

If you wish to add or remove channels from the 

memory, you will first need to cancel the Scan 

mode,  then  follow  the  directions  described 

under 'Programming the Scan Memories'.

TRANSMITTING

To  transmit,  press  the 

PTT

  switch.  Hold  the 

microphone  2  -  6  cms  from  your  mouth  and 

slightly to one side, so that your voice does not 

project directly into the microphone. Speak at a 

normal voice level. The TX4200 microphone is 

an  electret  type  which  is  quite  sensitive  to 

normal voice levels. It is not necessary to raise 

your voice or shout into the microphone.

You will find that the TX4200 will not allow you 

transmit  when  some  modes  or  functions  are 

selected.  This  is  to  prevent  accidental 

transmissions  over  the  top  of  others.  If  you 

press the 

PTT

 switch during one of these modes 

or functions, the TX4200 will simply produce a 

low beep until the 

PTT

 switch is released.

11

Содержание TX4200 Series

Страница 1: ...TX4200 SERIES UHF TRANSCEIVER Complies with SMAS 250 STANDARD COMMUNICATIONS PTY LTD INSTRUCTION MANUAL...

Страница 2: ...nnels set for Quiet Operation Operating in the Quiet Mode Deactivating the Quiet Mode Receiving a Signal in the Quiet Mode Return the Call Scanning in the Quiet Mode Important Tips on Scanning in the...

Страница 3: ...z 6dB per octave pre emphasis microphone pre emphasis Within 5 kHz 20dB limiting 300 Hz 3 kHz Hum and Noise Modulation Distortion Microphone Microphone Input Sensitivity Spurious Emissions Current Con...

Страница 4: ...nd noise suddenly disappears This is known as the threshold At this point the radio is quiet when there are no signals being received but any incoming signals will overcome the squelch and be heard in...

Страница 5: ...and scanning of QUIET and OPEN channel combinations with audible alarm when called Three SELCALL memories User programmable storage of three frequently called SELCALL Idents Open Scan and Group Scan...

Страница 6: ...s in the Scan memory Displays the selected channel number Indicates the TX4200 is transmitting OS mode Displays the last selected channel GS mode Displays the PRIORITY channel number Speaker BASIC FUN...

Страница 7: ...ply turn the Squelch control fully counter clockwise Channel Select the required channel by rotating the Channel selector switch clockwise or counter clockwise Rotating clockwise selects higher channe...

Страница 8: ...Recall the Priority Channel Press the Channel selector knob at any time The radio will immediately jump to the Priority channel If the radio was scanning the scan function will be cancelled To Change...

Страница 9: ...ep is heard M will appear in the display indicating the selected channel is now in the memory Open Scan OS Mode Open Scan mode allows up to 40 channels to be scanned in an ascending sequence Scanning...

Страница 10: ...GS Mode Group Scan mode allows you to transmit and receive normally on your Priority channel but between breaks in the conversation the radio can scan and listen to several other channels The receiver...

Страница 11: ...ve for 5 seconds the radio will resume scanning To manually hold a busy GS channel press SCAN The radio will exit the Scan mode and will remain on the busy GS channel NOTE You will no longer be monito...

Страница 12: ...all signal consists of 5 short tones transmitted in a sequence There are 10 different tones to choose from numbered from 0 to 9 By combining any 5 of these tones in a sequence a code is created The co...

Страница 13: ...et and which channels will remain Open open channels are those where all signals will be heard This means that as you change channels you don t have to turn the Quiet function on or off to suit specif...

Страница 14: ...gently for about 10 seconds It will then slow to about 1 beep every 3 seconds and will continue to beep indefinitely until you reset it see the section on dealer programmable options in the back of th...

Страница 15: ...tone standard This means that is compatible with the 5 tone Selcall systems used in other radios The only difference is that only the TX4200 and the earlier model TX4000 has the ability to transmit an...

Страница 16: ...TX indicator will appear and the Ident will be transmitted You don t need to continue to hold the CALL button down once the TX indicator appears The TX4200 will keep transmitting by itself until the c...

Страница 17: ...o all signals unless your Selcall Ident is received Channels NOT marked with Q will remain as open channels and will allow ALL signals to be heard even though the QUIET mode is active When your TX4200...

Страница 18: ...arked with Q If a signal containing your Selcall Ident is received on any channel OPEN or QUIET the QUIET mode will be cancelled and the alarm will beep to alert you to the call In addition the caller...

Страница 19: ...Selcall transmission starts This means that by the time the receiver gets around to scanning the correct channel some of the Selcall Ident tones may be missed If this happens the Selcall will not be r...

Страница 20: ...to leave your radio unattended but need to be informed immediately if a call specifically intended for you is received The PAGE function allows your TX4200 to automatically call another UHF receiver w...

Страница 21: ...d digit of the 5 digit Ident is now flashing This flashing digit indicates the digit to be programmed 2 Select the number required in the flashing digit position by rotating the channel selector switc...

Страница 22: ...lled and the caller s Ident will be displayed If you wish to return the call Briefly press the CALL button The TX4200 will enter the CALL TO mode and the caller s Ident will automatically be inserted...

Страница 23: ...ns where you may not be within listening range of your TX4200 s internal speaker Example 1 Your TX4200 is unattended inside an office and the internal speaker alarm cannot be heard in the workshop or...

Страница 24: ...e Alarm Input function takes priority over all other functions Whenever an Alarm input is detected the TX4200 gives priority to transmitting the Alarm signal If your TX4200 has been turned OFF with th...

Страница 25: ...8 Enabled 1XXXX None Enabled Enabled Disabled Enabled Enabled Disabled Enabled Disabled None Enabled Disabled 1XXXX Enabled Ch 23 Enabled Disabled Yes Yes Yes Yes No No Yes No No No No No No No No Ye...

Страница 26: ...heard after 5 seconds the radio will resume scanning If a signal appears on any channel group or Priority and the receiver locks onto it you can pick up the microphone and talk on that channel If the...

Страница 27: ...Radios The TX4200 is factory set to allow you to send and receive Group Calls to up to 10 radios If there are more than 10 radios in your fleet and you need to Group Call them your dealer can reprogr...

Страница 28: ...setting is normally disabled radio does NOT re enter QUIET mode after 10 seconds and the Selcall alarm beeps continuously If you change this setting to enabled your radio will open leave the QUIET mo...

Страница 29: ...the front panel then press the cover into place until it clicks To remove the microphone plug First remove the microphone socket cover as described above Then lift the tab on the mic plug upwards tow...

Страница 30: ...d in a prominent location The repeater is designed to receive signals on a designated channel and re transmit them on another channel Repeaters are usually located on hills mountains or tall buildings...

Страница 31: ...ory The QUIET mode is set Open Scan mode is selected Group Scan mode is selected The radio is transmitting The radio is ready to send the displayed Selcall Ident The radio has just received a Selcall...

Страница 32: ...e proof of purchase date i e receipt docket credit card slip etc and a full description of the defect to the Dealer from whom the unit was purchased All freight charges incurred for transportation by...

Страница 33: ......

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