Scan (Busy Stop) Operation; Priority Oper Switch; Tx Offset And Reverse; Auto Patch Operation - Kenwood TR-7850 Instruction Manual

2 . Split channel memory (CH 0, 14)
Example : To store 146 .580 MHz receive and
147 .660 MHz transmit in CH 14,
proceed as follows :
1 .
Set the KEY/M .SEL switch (13) to the KEY position
2 .
Set the memory channel selector (16) to CH 14 .
3 .
Enter the receive frequency.
Frequency before
input
a)
Press the © key (MHz digit) . . . . . . . . . . . 5.
b)
Press the (] key (100 KHz digit) . . . . 6._5
c)
Press the © key (10 kHz digit) . . . . . . .
SSH
d)
Press the QD key (1 kHz digit) . . . . . . . . .
5 .SH0
Note :
For frequency input precautions, refer to "Notes"
in the preceding section .
(4) Store the receive frequency in memory .
Press the (] key .
A pulsed tone will sound, indicating transmit
frequency is ready to be accepted .
N ote :
1 . The tone will sound intermittently until the
transmit frequency is stored in memory .
2 . When the
receive frequency is stored,
transmit frequency before the split (CH 14) is
indicated .
(5) Enter the transmit frequency .
a) Press the O
b)
Press the
c)
Press the
d) Press the
(6) Store the transmit frequency in memory .
Press the M) key (tone stops .) . . . . . . . . . . . . . . . 6 .5H"
The transceiver is now ready for split frequency
operation .
Set the KEY/M . switch (13) to the M . position () .
NOTE :
After the transmit frequency is stored, the frequency
display indicates the receive frequency previsouly set by
step (3) .
3 . Memory channel operation
With the KEY/M .SEL switch in the M . position (Z) .
the transceiver operates on the frequency set by the
MEMORY channel selector (16) .
4 . Changing memory frequencies .
If you wish to change any memory frequency, store a
new frequency in that channel using the above proce-
dures .
The old frequency is erased when the new
frequency is stored .
3-3 SCAN (Busy stop) Operation
key (MHz digit) . . . . . . . . . . . .
key (100 kHz digit) . . . . . . ?.IS
key (10 kHz digit) . . . . . . . . i .S5
key (1 kHz digit) . . . . . . . . . 1.6 SL
The SCAN operation is devided into keyboard scan, memory
scan and priority channel scan . For SCAN operation, the
squelch control should be advanced to the threshold point .
See section 3 .7, Squelch .
1 2
" KEYBOARD SCAN
1 . Set the KEY/M .SEL switch (13) to the KEY position
(_=5_)-
2 . Depress the
ED
key . Scan starts automatically in 10
kHz or 5 kHz steps depending on the position of the
STEP switch (14) .
3 . When a signal is present, scanning stops . Scan restarts
automatically after about 5 seconds .
4 . To release the scan, press the
O key (or the microphone
PTT switch .
" MEMORY SCAN
1 . Set the KEY/M . SEL switch (13) to the M . SEL position .
2 . Depress the
sc
key . The memory channels are scan-
ned .
Scan stops and restarts the same as in keyboars scan .
3-7 SQUELCH
" PRIORITY CHANNEL SCAN
Depress the PRIORITY ALERT switch (17) . Regardless of
the KEY/M . SEL switch position, a tone will sound and the
BUSY indicator (5) will light at about 6 seconds intervals if
the PRIORITY channel is in use . Traffic on the PRIORITY
channel will also be mommentarily heard .
3-4
PRIORITY OPER Switch
To call-up the frequency stored in the priority "0" channel
depress the PRIORITY OPER switch (19) .
3-5 TX OFFSET and REVERSE
After setting channel frequencies by the keyboard, press the
or
ED
key . Transmit frequency will be offset plus or mi-
nus 600 kHz from the receive frequency and the TX shift
indicator (3) will display the offset .
By pressing the REV switch (15), the transmit and receive
frequencies will be reversed . If, at this time, the transmit
frequency is beyond the amateur band frequency, a tone will
sound and the transceiver is automatically in simplex mode .
When the REV switch is pressed, the frequency indicated on
the display is also reversed, but the TX shift indicator (3)
will not change .
3-6 AUTO PATCH Operation
With the PTT switch depressed, the keyboses operates in
DTMF .
Tone signals will be transmitted for auto patch
operation . In transmit, to operate the fourth column
(ABCD),had the REV switch in and key the third column (3,
6, 9, #) .
To eliminate receiver noise at the no-signal condition, slowly
adjust the squelch clockwise until the noise disappears and
the BUSY indicator goes off (threshold point) .
The squelch will open, the BUSY indicator will light and the
speaker will operate when a signal is received .
The squelch control is also used for scan operation control .
If the signal is weak or fades during mobile operation,
readjust the squelch for consistent reception .