Kenwood TH-F6A Service Manual page 35

Single tone transmission
Function Overview
• This function enables you to transmit a single tone.
Example
• It is used to adjust DTMF deviation during production.
Operation
1 Press [PTT] and enter transmission mode.
2 Press [MONI] to enter the single tone mode.
3 Press any of [1] to [8] numeric keys to transmit a single
tone.
Details
• The single tone has eight frequencies.
[1] 697Hz
[2] 770Hz
[3] 852Hz
[4] 941Hz
[5] 1209Hz
[6] 1336Hz
[7] 1477Hz
[8] 1633Hz
• The single tone mode can be enabled only during
transmission.
• When the unit returns from transmission mode to reception
mode, the single tone mode is canceled.
transmission mode is set again and a numeric key is
pressed, dual tone (DTMF) is transmitted.
• When [MONI] is pressed again in single tone mode, it
returns to dual to tone mode.
• A dual tone is transmitted during DTMF memory
transmission even in the single tone mode.
Service Setup Mode
Function Overview
A. Power supply voltage :Set power supply voltage to 6.5 V.
B. TCXO :PLL reference TCXO adjustment
C. BPF :Adjust the BPF tune level.
D. 2nd local :Adjust the B band 2nd local
E. SSB BFO :Adjust the SSB offset frequency
F. Squelch :Adjust the squelch threshold and
G. S meter :Adjust the first segment and all-
H. APC :Adjust the HI, LOW, EL transmission
I. DCS modulation balance :Adjust the DCS modulation
J. MAX deviation :Adjust the max deviation.
K. Tone deviation :Adjust the tone deviation.
L. DCS deviation :Adjust the DCS deviation.
M. 9600 deviation :Adjust the 9600 deviation.
N. VOX gain adjustment :Adjust VOX gain.
ADJUSTMENT
When
oscillator.
(LSB, USB) level.
level 2 (level 2) voltage.
segment ON level of the S meter.
power.
balance.
TH-F6A/F7E
Example
• It is used to replace the EEPROM, readjust it, or review the
design in a service center.
Operation
1) Set the tone frequency and DCS code of each of the
frequency bands (144, 200, 400, 1200) of the A band to
specified values.
2) Set single band mode.
3) Service Setup Mode appears when accessing two illustrated
lands on the component mounted side of the TX-RX Unit
(A/3) while the trasceiver is switched ON. When the Service
Setup Mode is set, the following is displayed and adjustment
item setting state is displayed on the non-operation band
side.
A pict flashes.
3
144.000
VOLT : 83 : FF
• [2], [3]
: Changes adjustment items.
• [5], [∞]
: Increase or decrease frequency and
memory channel number.
• Encoder
: Increase or decrease the adjustment
value (real-time value).
• [MNU]
: Set the adjusted real-time value in
the EEPROM.
• Press [LAMP]
: Press the [LAMP] key to enter into
the menu modes. To release the
mode, press the key once again.
• Keys other than the above can be operated normally.
A. Power supply voltage adjustment
1) Display the "VOLT" item.
2) Set power supply voltage to 6.5 V.
3) Press [MNU] key to set the 6.5V reference voltage in the
EEPROM.
Overvoltage warning, battery remaining voltage display and
APC are controlled based on this value.
3
144.000
VOLT : 83 FF
Real-time value EEPROM setting
B. TCXO adjustment
1) Display the "TCXO" item.
2) The "real-time value" can be changed by turning the
encoder during transmission with "L" power.
3) Press [MNU] key to set the "real-time value" in the
EEPROM.
3
144.000
TCXO : 83 FF
Real-time value EEPROM setting
35