Kenwood TS 790 E Owners Manual

Page 2

Thank you for purchasmg this new transceiver.

IMPORTANT: h_a-_
Please read this Instruction Manual carefully before
placing the transceiver in service.

SAVE THIS INSTRUCTION MANUAL.

The following explicit definitions apply In this manual:
Note : If disregarded, inconvenience only, no risk
of equipment damage or personal injury.

This Instruction Manual covers the following I
models:
TS~790A;AII Mode Tribander *
iU.S.A. and general markets) I
TS-790E: All Mode Tribander '
(U.K. and European markets)
Illustrations show the TS~790A.

CONTENTS

Caution : Equipment damage may occur, but not
personal injury.
1. BEFORE OPERATION .................................... 3

2. SPECIFICATIONS AND ACCESSORIES. 4
2-1. SPECIFICATIONS .......... 4
2-2. ACCESSORIES .............. .5

3. INSTALLATION AND CONNECTION...............6

6
6
8
8

3-1. INSTALLATION .............
3-2. CONNECTION.
4. OPERATION ..........
4- 1. OPERATING CONTROLS
4-2. RECEIVER OPERATION...
4-3. TRANSMITTER OFERATION.. .
4-4. MEMORY.. ..34
4-5. SCAN
4-6. REPEATER OPERATION .....
4-7. TONE SOUELCH ICTCSS)..
4-8. TRACE FUNCTION ............
4-9. SATELLITE COMMUNICATIONS.

4-10. DATA COMMUNICATIONS ................... 46
4-11. OPERATION WITH A PERSONAL
COMPUTER ..................................... 47
4-12. VOICE SYNTHESIZER.. ................ 48
4-13. IZOOMHz IF CONNECTOR AND ACC4
CONNECTOR ...................................... 48

5. BLOCK DIAGRAM AND CIRCUIT DIAGRAM..49
S-I. BLOCK DIAGRAM ...............
5-2. CIRCUIT DIAGRAM .............

6. MAINTENANCE AND ADJUSTMENTS ..
6-1. GENERAL INFORMATION .
6-2. SERVICE .......
6-3. CLEANING .....
6-4. IN CASE OF DIFFICULTY..
6- 5. ORDERING SPARE PARTS
6- 6. ADJUSTMENTS ...........

7. OPTIONAL ACCESSORIES ............
7- 1. VS- 2 VOICE SYNTHESIZER

INSTALLATION ..................

7-2. TSU-S PROGRAMMABLE TONE
DECODER UNIT INSTALLATION ............ 66
7-3. UT-lO IZOOMHZ UNIT INSTALLATION ..67
7-4. OTHER ACCESSORIES ..
8. REFERENCE ........................

Page 27

SUB SOL cuntrol

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TUNING knob MAIN SOL control

MAIN BUSY indicator

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SUB BUSY Innlcatur

4-2-2. Beep Tones

Audible confirmation of microprosessor functions is
provided in the form of a series of audio beeps.The
output level of the Beeper is adjustable with a vari-
able resistor located inside the set. (Please refer to
Section 6-6-5)

4. Rotate the TUNING knob and select an open chan-
nel. Then turn the SOL control clockwise until the
noise just disappears.

5. Select the desired operating frequency.When a sig-
nal is received, the BUSY indicator will turn on and
the S-meter will deflect.

6. To turn off the transceiver, turn off the trans-
ceiver's POWER switch before you turn off the
power supply, or if in a vehicle, before you stop the
engine.

4-2-3. Audible Made Announcement

When 3 Mode key is pressed, the first character of
the mode is sounded in Morse code thru the speaker.

Mode , Morse Code i
VFM , ~ ---

CW (Wide) - ' - '
CWN (Narrow) --

Note:
You can select a single audio beep rather than Morse Code
confirmation by pressing the CW/N key whenturning on the
power switch (Please refer to Section 4-25 l

27

Page 33

1. Connect a key or electronic keyer to the rearpanel
KEY jack.
. Place the POWER switch ON.
. Set MODE keys to CW if required.
Enter the desired frequency (Shown in the MAIN
display).
5. Press the key'; the ON AIR indicator lights and the
meter pointer deflects.
6. Release the key. Reception mode will be restored
with the ON AIR indicator turned off.

been

4-3»5. Speech Processor

The Speech Processor is used when signals from your

station are week at the distant station.

Notes:

1 . Intelligibility is normally reduced when the speech
processor is used.

2. This function is not useful in the FM mode.

Speak into the microphone and adjust the MIC gain
control so that the meter deflection does not exceed
the ALC zone on voice peaks.

FRO: ALCE

MIC --3- RF Pwn

ALC ZONE

4-3-6. VOX (Voice Operated Switch)

Switching between transmit and receive can be voice
controlled in the 558, FM and AM modes by using the
optional VOX-4 unit. The operators manual supplied
with the VOX-4 contains instructions for its use. The
processor should not be used when the VOX-4 is ON.
When operating in the CW mode the VOX GAIN on
the VOX-4 should be adjusted for minimum (OFF),
since voice inputs would tend to cause the radio to
transmit.

4-3-7. Split Frequency Operation

Allows the use of one VFO fortransmit, and the other
for receive (Split Frequency operation).

For example:

VFO A is the active VFO. and VFO B is the inactive
VFO. Depressing the SPLIT key will cause the trans-
ceiver to receive on VFO A and transmit on VFO B.
The mode of reception and transmission will follow
the mode contained in the appropriate VFO memory.
It is possible to work cross band. cross mode if
desired.

To avoid confusion during contest, or pile-up opera-
tions we recommend using VFO A for receive and VFO
B for transmit.

4-3-8. Duplex Operation

Pushing the PTl' switch on the microphone allows the
simultaneous reception in the SUB band trequency
and sending in 3 MAIN band irequency.

Note:
With certain relationship between the sending and
receiving frequencies, the receiver sensitivity may be
suppressed.

33

Page 47

4-11.

OPERATlON WITH A PERSONAL
COMPUTER (Requires optional
lF-23ZCl

Control with a personal computer is possible with the
optional lF-232C interface. For more information, refer
to the manuals provided with the interface

I Function list

AUTO INFORMATION ONIOFF setting

BUSY signal readout

CTCSS number selection and readout

CTCSS ONIOFF selection and readout
DESTINATION CODE selection and readout
Same function as microphone UP/DOWN switch
VFO A and VFO B frequency selection and readout
VFO A and VFO B MEMORY CALL setting
Model No. readout for transceiver recognization
Display of transceiver current condition

LOCK ONIOFF setting and display

AUTO LOCK TUNE ONIOFF selection and readout
Memory channel setting

Mode setting

Memory display

one...-

MUTE ONIOFF selection and readout
Memory entry

OFFSET setting

RIT frequency clearance

RIT frequency UP/DOWN

RlT ONIOFF setting

RX: For receive operation,
operation

Scan ONIOFF setting
S-Meter signal output

SPLIT ONIOFF setting

STEP ONIOFF setting
Sub-tone lrequency setting
TONE ONIOFF setting
Generation of synthesized voice

TX:For transmit

l7