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USB I
LSB
TUN
CW
14.100.0
REC: 14.100.8*
SEND: 14.100.0
14.098.5*
14.101.5*
0
COUNT. IN
0
8OO OO 0 0
cm
RESISTOR OR CAPACITOR
2.
BAND switch and Main Tuning Knob
Turn the TS-520S BAND 'switch from
WWV to 29.1 step by step, and the DG-5 will
display each band frequency in units of MHz.
Turning the Main Tuning knob will change
the display frequency. When the BAND switch
is at AUX, all digits except the points will go
off unless the AUX circuit is built in the TS-520S.
This results from the action of the DG-5 blanking
circuit with it having neither HET nor VFO
signal input.
3.
MODE switch
Turning the MODE switch will change the
carrier frequency, that is, this changes with
the modes of operation: USB, LSB, CW trans-
mit or receive. For example, assume that the
switch is set to TUN and the display frequency
to "14.100.0". Turning the switch will change
the display frequency as shown below.
NOTE (*): These values may deviate slightly
with a diffrernt setting of the carrier
point.
4.
FUNCTION switch
When operating the TS-520S alone or in a
fixed channel, turning the FUNCTION switch
will change the display frequency as shown
below.
FUNCTION SW
POSITIONED AT:
RECEIVE
SEND
C
A
L
FIX
Heterodyne freq— 10 MHz
RMT
25kHz
MAIN*
VFO
VFO-R
MAIN*
BLK* or FIX*
FIX-R
BLK* or FIX*
MAIN*
FIX
BLK* or FIX*
NOTE (* • "MAIN" indicates the TS-520S Main
Tuning knob set frequency.
"BLK" is the blanking state where
no digits appear.
"FIX" is the fixed channel frequency.
If using a remote VFO, for example, the
KENWOOD's Model VFO-520S, notice that the
display frequency will change as the remote
VFO FUNCTION switch turns. For details,
reference should be made to its operating manual.
5.
RIT control and switch
The RIT control changes the receiver tuning
frequency alone when the RIT switch is pressed
in "ON". While the RIT circuit is in operation,
the display frequency will change by switching
the mode of operation from transmit to receive,
and vice versa.
3-3 OPERATION FOR FREQUENCY
COUNTING
Your DG-5 is made a frequency counter
measurable frequencies as wide as 100Hz to
40MHz by setting the DISPLAY-COUNTER
selector to COUNTER. To input an unknown
frequency, connect to the COUNT. IN connector
on the rear panel with the supplied counter
cable.
If the given circuit is low in the impedance,
or below several kilOhms for the DG-5, the
cable may be directly connected to the circuit.
In general, frequency counters contain at the
cable end around 100pF capacitance and some
input resistance; the DG-5 has 22pF plus 60 to
65pF cable capacitance and 5k&2 resistance.
At frequencies as high as order of MHz or as low
as audio frequencies, a high-impedance circuit
could fail to work or deviate the output fre-
quency when the cable is connected to the
circuit. In such a case, connect a proper coupling
resistor, capacitor, or attenuator to the cable
end as shown in Figure 4. This is to prevent the
Figure 4. Resistor or Capacitor Placed for
Accurate Frequency Counting.
7
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