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KENWOOD TH-78A 144/440 MHz Dual Bander
INSTRUCTION MANUAL
CONTENTS
CONTROLS OVERVIEW
............................................................................................................................ 5
THE BATTERY PACK
1 NiCd Battery Pack (PB-13) ......................................................................................................................... 6
2 Recharging .................................................................................................................................................. 6
3 Installing The Battery Pack ......................................................................................................................... 6
4 Battery Voltage Level .................................................................................................................................. 6
5 Battery Operating Time ............................................................................................................................... 7
RECEIVER OPERATION
1 Getting Started ............................................................................................................................................ 7
2 Tuning Control and Volume Control ............................................................................................................ 8
3 Selecting Frequency ................................................................................................................................... 10
4 Step Size Selection ..................................................................................................................................... 11
5 Programmable VFO Tuning Limits ............................................................................................................. 12
6 Basic Receiving Functions .......................................................................................................................... 13
TRANSMITTER OPERATION
1 To Transmit ................................................................................................................................................. 13
2 Changing Transmitter Output Power .......................................................................................................... 14
3 TX. Stop Function ....................................................................................................................................... 14
4 Time Out Timer ........................................................................................................................................... 14
USING THE MEMORY
1 Microprocessor Memory Backup ................................................................................................................ 15
2 Initializing The Memory ............................................................................................................................... 15
3 Memory Channel ......................................................................................................................................... 15
4 Memory Contents ........................................................................................................................................ 16
5 Entering Memory Data ................................................................................................................................ 16
6 Entering Split Channel Frequencies ........................................................................................................... 16
7 Entering The Call Channel Frequencies ..................................................................................................... 17
8 Recalling Memory Channels ....................................................................................................................... 18
9 Memory Shift ............................................................................................................................................... 18
10 Memory Channel Character Display ........................................................................................................... 18
SCANNING
1 Hold/Resume Programming ....................................................................................................................... 19
2 Scan operation cancel ................................................................................................................................ 20
3 Scan options ............................................................................................................................................... 20
4 Scanning Memory Channels ....................................................................................................................... 21
5 Scanning Band ............................................................................................................................................ 21
6 Programmable Band Scan .......................................................................................................................... 21
7 MHz Scan .................................................................................................................................................... 22
8 VFO/Memory Scan ..................................................................................................................................... 23
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Page 3 9 CALL/VFO Scan ......................................................................................................................................... 23
10 CALL/Memory Scan .................................................................................................................................... 23
11 VFO/Memory/CALL Scan ........................................................................................................................... 23
12 The Alert function ........................................................................................................................................ 23
REPEATER OPERATION
1 Transmitter Offsets ..................................................................................................................................... 24
2 Selecting the Offset Direction ..................................................................................................................... 24
3 Automatic Offset Selection ......................................................................................................................... 24
4 Manual Offset Selection .............................................................................................................................. 24
5 The REVerse Function ................................................................................................................................ 24
6 Tone Selection ............................................................................................................................................ 25
7 Autopatch Operations ................................................................................................................................. 26
8 DTMF Memory ............................................................................................................................................ 27
OPERATION AS A REPEATER ................................................................................................................ 28
CTCSS OPERATION .................................................................................................................................... 28
THE DUAL TONE SQUELCH SYSTEM (DTSS)
1 DTSS Code ................................................................................................................................................. 29
2 Using the DTSS Function ........................................................................................................................... 29
3 Using DTSS with a repeater ....................................................................................................................... 30
PAGING
1 Paging Operation Overview ........................................................................................................................ 30
2 Paging Code Memory ................................................................................................................................. 31
3 Setting Paging Codes ................................................................................................................................. 31
4 Sending Pages (Calling) ............................................................................................................................. 33
5 Receiving Pages (W ait) .............................................................................................................................. 34
6 Canceling Signal Squelch ........................................................................................................................... 35
7 Locking Out Codes ..................................................................................................................................... 35
8 Answer-Back ............................................................................................................................................... 36
MESSAGE TRANSMISSION AND RECEPTION
1 Message Transmission modes ................................................................................................................... 36
2 Using the Message Memory ....................................................................................................................... 36
3 Message Memory Check ............................................................................................................................ 37
4 Message Memory Transmission ................................................................................................................. 37
5 Message reception ...................................................................................................................................... 37
6 Receive Message Memory ......................................................................................................................... 38
ENHANCED RECEIVER FUNCTIONS
1 The Tone Alert System ............................................................................................................................... 39
2 Monitor ........................................................................................................................................................ 40
3 Beep Off ...................................................................................................................................................... 40
4 Lamp ........................................................................................................................................................... 40
5 Key Lock ..................................................................................................................................................... 40
6 Volume adjustment when you use an earphone ......................................................................................... 40
7 Switching speaker output when a speaker-microphone is connected ........................................................ 41
8 Automatic Band Change Function .............................................................................................................. 41
9 Simultaneous Receive Function of Two Signals in the Same Band ........................................................... 41
10 Single Band Operation ................................................................................................................................ 42
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- To simultaneously receive two VHF band signals
1) Press the BAND
key to select the UHF band.
2) Press the f
2 key. The UHF band display also shows the second VHF band frequency.
- To simultaneously receive two UHF band signals
1) Press the BAND
key to select the VHF band.
2) Press the f
2 key. The VHF band display also shows the second UHF band frequency.
Notes on simultaneous In-Band reception
1 W hen two signals on the same band are received simultaneously, the receive performance , such as
sensitivity, may be reduced.
2 If the two frequencies are the same, the volume may decrease at some VOL control positions.
To return to normal operation, press the f
2 key again.
10. Single Band Operation
W hen you press the DUAL
key, the band for which the PTT indicator is on is selected, and you can perform a
single-band operation with that band.
W hen you press the BAND
key, you toggle between single-band and dual-band operation.
11. MHz Mode
If you use this function, you can change the frequency in 1-MHz steps.
Press the MHz
key.
The 100-kHz digit and lower digits of the operation band gl blank. W hen you turn the tuning control, the frequency
changes in 1-MHz steps.
To return to the normal frequency display, press any front panel key (except E. CHG key) or wait 10 seconds.
12 Channelized Frequency Display
The frequency display can be changed to display channel numbers instead of the operating frequency. This
function makes use of the data you have stored in memory for this functions. Channel 1 is memory channel 1,
Channel 2 is memory channel 2, etc.
