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FREQUENCY SHIFT DIRECTION (SFT-D) ---- MENU24

In standby mode, press 

MENU + 24

. The screen will display “

SFT-D

”.

Press 

MENU

 to enter the function. Press the ▲/▼ buttons to select 

+/-/OFF

, then press 

MENU

 

to confirm. 

To return to the standby mode press 

EXIT

.

+ (positive offset):

 If the transmitting frequency is higher than the receive one.

- (negative offset): 

If the transmitting frequency is lower than the receive one.

OFF:

 frequency shift turned off.

STOPWATCH TIMER (SECOND) --- MENU 25

In standby mode, press 

MENU + 25

. The screen displays “

SECOND

”.

Press 

MENU

 to enter. Press the ▲/▼ buttons to enable/disable (ON/OFF) the function, then press 

MENU

 to confirm. To return to the standby mode press 

EXIT

.

Using the stopwatch timer:

When this function is ON, press 

 to start counting, to stop counting you can press any key. 

Press 

 again to re-start counting.

To exit the function, stop the counting first, and then press the 

EXIT

 button.

CHANNEL NAME (CHNAME) --- MENU 26

To set the channel name, you have at your disposal 26 letters (A to Z) and 10 numbers (0 to 9).

You can choose only 6 characters to create the channel name.

To edit the channel name:

At least one channel should have been stored.

To display the name of the channels, press 

MENU + 21

Select the desired channel, then press 

MENU+ 26 + MENU

. The screen displays six ‘_’ symbols. 

Press 

 to select the character and 

 to confirm and go on, then press 

 again to select the se-

cond character. and ▼ to confirm and go on. After have selected the sixth characters press 

MENU

 

to confirm. To exit the function press 

EXIT

. The screen displays the channel name and also the 

channel number on the right corner of the display.

STORED CHANNELS (MEM-CH) --- MENU 27

In Frequency and in Standby mode, you can store frequencies and parameters.

Press 

MENU + 27

; the screen will display “

MEM-CH

”.

Press 

MENU

 to enter the function. Press the ▲/▼ buttons to select the channel, then press 

MENU

 

to store it.

A vocal sound will confirm the storing success. Press 

EXIT

 to exit the current channel

E.g.:

 to set 430.025MHz as receiving frequency and 435.025MHz as transmitting frequency in 

CH-20, follow these steps:

1. On Frequency mode, digit 

430025

, then 

MENU+ 27 + MENU

, to enter the function. Digit 20 or 

use the ▲/▼ buttons to select 

CH-20

. Press 

MENU

 to confirm. A vocal sound will confirm the 

storage success, then press the 

EXIT

 button.

2. Digit 

435025

 and then 

MENU+ 27 + MENU + MENU

. A vocal sound will confirm the storage 

success, then press the 

EXIT

 button.

NOTE:

If the stored channel needs a CTCSS/DCS code, you should set it before storing the channel.

It is possible to transmit on the stored channel only if you have stored its frequency first.

Manual storage is possible only on empty channels, after have deleted all the previous parame-

ters. 

Summary of Contents for ct 790

Page 1: ...ircuits If it appears that the Radio diffuses peculiar smell or smoke please shut off its power immedia tely and take off the charger or battery from the Radio Do not transmit without antenna Main functions Dual Band Dual Frequency Dual Display and Dual Standby Frequency Range 144 146MHz 430 440MHz Rx Tx Working mode U V V V or U U available Same channel VHF T x UHF Rx or UHF T x VHF Rx available ...

Page 2: ...n transmitting Menu Channel Reset DESCRIPTION OF THE DEVICE LCD display 1 2 4 6 3 5 16 15 7 14 13 12 11 10 9 8 Busy channel locked 1 High low power transmitting 2 Frequency selected 3 CTCSS 4 DCS 5 Split positive 6 Split negative 7 Reverse frequency 8 Dual band 9 VOX function 10 Received signal on Vice frequency 11 Bandwidth indicator 12 Battery level indicator 13 Menu channel number 14 Menu chann...

Page 3: ...ume control 26 Transmission led 27 Single dual band switch key 28 Exit 29 key Reverse frequency Scan key 30 Lock key Stopwatch timer key 31 PTT 32 push to talk key Side key1 Scan Lamp SOS CH Radio 33 Side key2 monitor long press flashlight 34 short press Ext speaker microphone jack 35 Battery latches 36 17 18 19 20 21 22 23 24 31 30 29 28 27 26 25 34 33 32 36 35 ...

Page 4: ...ng and the vice frequency is only for receiving When the vice frequency receives a signal the screen displays S SCAN key Press slightly the Scan key to set the Reverse Frequency ON OFF Keep it pressed for 2 secon ds to activate the Scan function Side key 2 Press slightly the Side key 2 to turn ON OFF the flashlight Keep it pressed for 2 seconds to enable the Squelch function 1750Hz Burst Tone Some...

Page 5: ...ignal is weak Set the same DCS codes of your group and turn on the squelch By setting the level too high you may not receive the weak signals while by setting it too low you may receive noises or undesired signals NOTE This transceiver has ten 0 9 available levels 0 means that the Squelch is turned on From level 1 to level 9 you will have different levels of noises reduction The higher is the leve...

Page 6: ...de press EXIT VOX VOX MENU 7 This function allows hands free conversations just speak in the direction of the microphone and the communication will be automatically activated As the VOX should check the voice transmission will be a little delayed and the beginning voice may not be transmitted In standby mode press MENU 7 The screen will display VOX Press MENU to enter the function Press the button...

Page 7: ...firm To return to the standby mode press EXIT BUSY CHANNEL LOCKED BCL MENU 13 This function prevents the interference of other communicating channels If the selected channel has been occupied by pressing the PTT button the transceiver will not transmit In standby mode press MENU 13 The screen will display BCL Press MENU to enter the function Press the buttons to select ON OFF then press MENU to co...

Page 8: ... confirm To return to the standby mode press EXIT NOTE This transceiver has 105 DCS groups TRANSMIT WITH DCS T DCS MENU 18 In standby mode press MENU 18 The screen displays T DCS Press MENU to enter the function Press the buttons to turn OFF this function or to select a DCS code from D023N to D754I then press MENU to confirm To return to the standby mode press EXIT NOTE This transceiver has 105 DC...

Page 9: ...each time To stop transmitting press any key If a carrier signal appears during the transmission interval the radio starts receiving After the carrier signal disappears the transceiver will resume transmitting the SOS signal auto matically Press any key to stop transmitting the SOS signal NOTE This function can be used only after have set the channel frequency band In standby mode press MENU 20 Th...

Page 10: ...el mode In standby mode press MENU 21 then press the buttons to choose the working mode Press MENU to confirm You can shift between Channel mode and Channel Name mode only after have stored at least one channel and one named channel AUTOBACKLIGHT ABR MENU 22 In standby mode press MENU 22 The screen will display ABR Press MENU to enter the function Press the buttons to enable disable ON OFF the aut...

Page 11: ... The screen displays six _ symbols Press to select the character and to confirm and go on then press again to select the se cond character and to confirm and go on After have selected the sixth characters press MENU to confirm To exit the function press EXIT The screen displays the channel name and also the channel number on the right corner of the display STORED CHANNELS MEM CH MENU 27 In Frequen...

Page 12: ...firm the screen will display RESET WAIT After have set the Reset the transceiver will auto power off and reboot again CTCSS DCS FREQUENCY SCAN SCN CD MENU 30 This function enable the scan of all CTCSS or DCS frequency codes When the transceiver is in receiving mode press MENU 30 the screen displays SCN CD Press MENU to enter the function Press the buttons to select to scan CTCSS or DCS then press ...

Page 13: ...transmit again BATTERY CHARGE Insert the AC plug into the outlet AC 90 240V The charger indicator start blinking indicating that it is in charging standby Insert the transceiver with the battery pack into the charger the RED indicator turns on indicating that the recharging begins Once the led indicator become green the battery pack will be fully charged NOTE If the battery pack is totally dischar...

Page 14: ...no sound heard Make sure the volume is not too low Make sure to have the same CTCSS and DCS codes of your group The keypad doesn t work keypad lock function hasn t been enabled In standby the radio transmit without pressing PTT VOX level has been set too low Adjust it Some functions cannot be stored Ensure to be on Channel mode In Channel mode some functions can be set only through the programming...

Page 15: ...ating Temperature 30 C to 60 C Working Mode monoband dualband Output Power VHF 5W UHF 4W Modulation F3E FM Max Frequency Deviation 5KHz Spurious Radiation 60dB Frequency Stability 2 5 ppm Receive Sensitivity 0 2uV Audio Output power 500mW Dimension 58 X 105 X 39 mm Weight 250g Specifications are subject to change without notice ...

Page 16: ...16 ...

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