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4
USING DIFFERENT OPERATING MODES
4-7 Packet operation
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RECEIVING
Band keys
[AF]
Tuning dials
[SSB] [AM/FM]
Band keys
[MIC GAIN]
[SSB]
[RF PWR]
[AM/FM]
200 Hz
2125 Hz
2325 Hz
1000 Hz
2200 Hz
1200 Hz
Carrier point
Before operating packet (AFSK) be sure to consult the
operating manual that came with your TNC.
➀
Connect a TNC and personal computer (p. 68)
➁
Push a band key to select an operating band.
➂
Push a mode key to select an operating mode.
• Generally, LSB is used for packet operation on the HF
bands and FM is used for packet operation on the VHF
band.
➃
Rotate [AF] to set the audio to a comfortable listen-
ing level.
➄
Rotate the tuning dial to tune the desired signal.
• Received signal strength is indicated in the S-meter.
ı
TRANSMITTING
Before transmitting, monitor your selected operating
frequency to make sure transmitting won’t cause inter-
ference to other stations on the same frequency.
➀
Connect a TNC and personal computer (p. 68)
➁
Push a band key to select an operating band.
➂
Push a mode key to select an operating mode.
• Generally, LSB is used for packet operation on the HF
bands and FM is used for packet operation on the VHF
band.
➃
Rotate [RF PWR] to set the output power.
• Relative strength of the transmitted signal is indicated in
the P
0
meter while operating the TNC.
• When operating in SSB mode, adjust output power so
that the ALC reading in the ALC meter stays in the ALC
zone.
➄
Transmit your AFSK signals using your computer’s
keyboard.
☞
NOTE: When connecting a TNC to the ACC socket
on the back of the transceiver, rotate [MIC GAIN]
fully counterclockwise and disconnect the micro-
phone from the [MIC] jack.
FREQUENCY INDICATION DURING AFSK
When operating AFSK in SSB mode, the indicated fre-
quency is the signals carrier point.
[EXAMPLE]: HF band, LSB mode, 2125/2325 Hz tone
[EXAMPLE]: VHF band, FM mode, 1200/2200 Hz tone
Summary of Contents for IC-746
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