Icom IC-730 Instruction Manual page 19

5 - 5 - 3 WWV RECEPTION
To receive WWV (or other standard frequency station), set
the operating band to 10MHz in the HAM band, and the
MODE to any mode. Tune to·10.000.0MHz on the fre-
quency display.
The WWV signal can be used for alignment of a frequency
counter, marker oscillator, or the frequency display.
5 - 5 - 4 SIMPLE FREQUENCY ALIGNMENT
A very accurate frequency counter is necessary to align the
frequency of the IC-730. However, the frequency can be
aligned simply by receiving the WWV signal.
1. Set the frequency display to 10.000.0MHz and be sure
that you are receiving the WWV signal.
2. Set the operating mode to CW. An 800Hz beat can be
heard.
3. Short the KEY Jack on the rear panel so that the CW
sidetone also becomes audible.
4. Rotate the FREQUENCY SET Control, located under
the access cover, so that the two tones are of the
same pitch (in zero beat). If the tones are difficult to
adjust because of a difference in their strengths, adjust
the CW sidetone level with the CW MONI control, also
located under the access cover, until the strengths are
the same.
5 - 5 - 6 TRANSVERTER CONNECTION
When the optional TRV unit, IC-EX205, is installed and the
transverter control signal (+8V) is applied to Pin 11 of the
ACCESSORY socket, the ALC terminal can be used for a
VHF/UHF transverter INPUT/OUTPUT terminal.
The transverter' s input/output frequency and signal level
should be as follows:
•
Transverter INPUT/OUTPUT Frequency 28 -30M Hz
•
Input/Output Level
Transmit (Output): Max. 150mV across a 50 ohm load
Receive (Input):1µV for S/N 10dB
5 - 5 - 7 LINEAR AMPLIFIER CONNECTION
The jack on the rear panel marked MEMO (SEND) is dual
function, running from this jack on the interior of the set is
wire which is connected to Plug P37. When this plug is
When the optional marker unit, IC-EX195 is installed,
operating frequency can be calibrated each 25KHz or
100KHz on the all bands.
WHEN ALIGNING THE FREQUENCY, DO NOT PUT THE
UNIT IN THE TRANSMIT MODE.
Be sure the T/R switch is in the Receive position, the VOX
switch is OFF, and that you do not touch the PTT switch on
the microphone.
5 - 5 - 5 SATELLITE COMMUNICATION
At present there are two active satellites for amateur radio
use, though more are being planned. AMSAT OSCAR 7
was launched in November, 1974, and AMSAT OSCAR 8
was launched in March, 1978. Satellite communications
can be made by using an IC-251A/E or IC-260A/E for
transmitting and the IC-730 for receiving. For operation,
and frequency information, refer to the chart below.
Since communication satellites are moving at very high
speeds, the down-link signals can be heard on a higher
frequency than the real frequency as a satellite
approaches, and on a lower frequency as it travels further
away. Further information on communicating through
satellites can be found in various amateur radio books and
periodicals.
connected to J1 on the ACC board, memory backup
function is available, when connected to J3, there is a relay
built-in for keying a linear amplifier. (Refer to page 10.)
When installed optional LDA unit, IC-EX202, the IC-730
puts out the band control voltage to change operating band
automatically for external equipment such as linear am-
plifier and antenna tuner. The voltage is put out from Pin 13
of the accessory socket. (Refer to page 10.)
Band Control Voltage Chart
BAND (MHz)
3.5
7
14
18 – 21
24 – 28
10
-- 17 --
Band Control Voltage
6.0 ~ 6.5V
5.0 ~ 5.5V
4.0 ~ 4.5V
3.0 ~ 3.5V
2.0 ~ 2.5V
0 ~ 1.2V