FUNCTIONS FOR RECEIVE Section 5 ■ Spectrum scope screen ……………………………………………… 5-2 D Center mode ………………………………………………………… 5-2 D Fix mode ……………………………………………………………… 5-3 D Mini scope screen indication ……………………………………… 5-4 D Scope set mode ……………………………………………………… 5-4 ■ Preamplifier ……………………………………………………………… 5-9 ■ Attenuator ……………………………………………………………… 5-9 ■ RIT function …………………………………………………………… 5-10 D RIT monitor function …………………………………………………5-10 ■ AGC function …………………………………………………………… 5-11 D Selecting the preset value ……………
5 FUNCTIONS FOR RECEIVE ■ Spectrum scope screen This function allows you to display the conditions of the selected band, as well as relative strengths of signals. The IC-7800 has two modes for the spectrum indication— one is center mode, and anther one is fix mode. In addition, the IC-7800 has a mini scope screen for regular scope indication. D Center mode Displays signals around the set frequency within the selected span. The set frequency is always displayed at the center of the screen.
FUNCTIONS FOR RECEIVE 5 D Fix mode Displays signals within the specified frequency range. The selected frequency band conditions can be grasped at a glance when using this mode. [F-2•ATT] q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [F-1•SCOPE] to select the scope screen. e Push [F-5•CENT/FIX] to select the fix mode. [F-4•HOLD] [F-5•CENT/FIX] •“ ” is displayed when fix mode is selected.
5 FUNCTIONS FOR RECEIVE D Mini scope screen indication The mini scope screen can be displayed with another screen indication, such as set mode menu, decoder screen, memory list screen, etc. simultaneously. q Set the scope mode (center or fix), marker, attenuator, span, etc. in advance. (pgs. 5-2, 5-3) w Push [M.SCOPE] to toggle the mini scope indication ON and OFF. • The S/RF meter type during mini scope indication can be selected in display set mode (Meter Type (Wide Screen) item). (p. 12-11) [M.
FUNCTIONS FOR RECEIVE 5 D Scope set mode (continued) Turn the peak level holding function ON and OFF. Select the center frequency of the spectrum scope indication (center mode only). • Filter center : Shows the selected filter’s center frequency at the center. • Carrier Point Center : Shows the selected operating mode carrier point frequency at the center. • Carrier Point Center (Abs. Freq.
5 FUNCTIONS FOR RECEIVE D Scope set mode (continued) Select the sweeping speed for the ±50 kHz span selection from SLOW, MID and FAST. Select the sweeping speed for the ±100 kHz span selection from SLOW, MID and FAST. Select the sweeping speed for the ±250 kHz span selection from SLOW, MID and FAST. Set the scope edge frequencies for fix mode scope with below 1.6 MHz band selection. • Set the frequencies within 0.030 to 1.600 MHz range in 1 kHz steps.
FUNCTIONS FOR RECEIVE 5 D Scope set mode (continued) Set the scope edge frequencies for fix mode scope when 8 to 11 MHz band is selected. • Set the frequencies within 8.000 to 11.000 MHz range in 1 kHz steps. Up to 500 kHz band width can be specified, so either edge frequency will be set to the difference between higher and lower frequencies become 5 to 500 kHz automatically while setting another edge frequency. Set the scope edge frequencies for fix mode scope when 11 to 15 MHz band is selected.
5 FUNCTIONS FOR RECEIVE D Scope set mode (continued) Set the scope edge frequencies for fix mode scope when 26 to 30 MHz band is selected. • Set the frequencies within 26.000 to 30.000 MHz range in 1 kHz steps. Up to 500 kHz band width can be specified, so either edge frequency will be set to the difference between higher and lower frequencies become 5 to 500 kHz automatically while setting another edge frequency. Set the scope edge frequencies for fix mode scope when 30 to 45 MHz band is selected.
FUNCTIONS FOR RECEIVE 5 ■ Preamplifier The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Set this to preamp 1 or preamp 2 when receiving weak signals. ➥ Push [P.AMP] several times to set the preamp OFF, preamp 1 ON or preamp 2 ON. [P.AMP] For all HF bands High gain preamp for 24 MHz band and above ✔ About the “P.AMP2” The “P.AMP 2” is a high gain receive amplifier. When the “P.
5 FUNCTIONS FOR RECEIVE ■ RIT function The RIT (Receive Increment Tuning) function compensates for off-frequencies of the communicating station. The function shifts the receive frequency up to ±9.99 kHz in 10 Hz steps without moving the transmit frequency. [RIT/∂TX] q Push [RIT] to turn the RIT function ON and OFF. [RIT] •“ ” and the shifting frequency appear when the function is ON. w Rotate the [RIT/∂TX] control. • Push [CLEAR] for 1 sec. to reset the RIT frequency.
FUNCTIONS FOR RECEIVE 5 ■ AGC function The AGC (auto gain control) controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading, etc. [AGC] control for main [AGC] control for sub The transceiver has 3 AGC characteristics (time constant; fast, mid, slow) for non-FM mode. [AGC VR] for main [AGC VR] for sub The FM mode AGC time constant is fixed as ‘FAST’ (0.1 sec.) and AGC time constant cannot be selected.
5 FUNCTIONS FOR RECEIVE ■ Twin PBT operation General PBT (Passband Tuning) function electronically narrows the IF passband width by shifting the IF frequency to slightly outside of the IF filter passband to reject interference. This transceiver uses the DSP circuit for the PBT function. Moving both [TWIN PBT] controls to the same position shifts the IF. ➥ The LCD shows the passband width and shift frequency graphically. ➥ Push [FILTER] for 1 sec. to enter the filter set screen.
FUNCTIONS FOR RECEIVE 5 ■ IF filter selection [FILTER] for main The transceiver has 3 passband width IF filters for each mode. [FILTER] for sub For SSB, CW and PSK modes, the passband width can be set within 50 to 3600 Hz in 50 or 100 Hz steps. A total of 41 passband widths are available. For RTTY mode, the passband width can be set within 50 to 2700 Hz in 50 or 100 Hz steps. A total of 32 passband widths are available. For AM mode, the passband width can be set within 200 Hz to 10 kHz in 200 Hz steps.
5 FUNCTIONS FOR RECEIVE D Roofing filter selection The IC-7800 has 6 kHz roofing filter. The roofing filter allows you an interference reduction from nearby strong signals. q Push [FILTER] for 1 sec. to enter filter set screen. w Select any mode except FM. e Push [F-6•ROOFING] to select the desired filter from 15 kHz (regular 1st IF filter) and 6 kHz (roofing filter). • Push [F-4•DEF] for 1 sec. to select a default value. r Push [EXIT•SET] to exit filter set screen.
FUNCTIONS FOR RECEIVE 5 D Filter shape set mode (continued) Select the filter shape for CW mode in HF bands. The set filter shape is automatically used only when the IF filter that 500 Hz or narrower setting is set. Select the filter shape for CW mode in HF bands. The set filter shape is automatically used only when the IF filter that 600 Hz or wider setting is set. Select the filter shape for SSB mode in 50 MHz band.
5 FUNCTIONS FOR RECEIVE ■ Dualwatch operation Dualwatch monitors 2 frequencies simultaneously. The IC-7800 has 2 independent receiver circuits to allow you to a dualwatch even in different frequency band and mode. [MAIN] [SUB] q Set the desired frequency and mode into the main band. w Push [DUALWATCH]. [SPLIT] •“ ” appears. • Pushing [DUALWATCH] for 1 sec., the sub band is equalized at the same time. This quick dualwatch function can be turned OFF in set mode. (p.
FUNCTIONS FOR RECEIVE 5 ■ Noise blanker The noise blanker eliminates pulse-type noise such as from car ignitions. The noise blanker is not available for FM mode. [NB] for main q Push [NB] to turn the noise blanker function ON and OFF. [NB] for sub • [NB] indicator above their switch lights green. w Rotate [NB] control to adjust the noise blanker threshold level. When using the noise blanker, received signals may be distorted if they are excessively strong or the noise type is different.
5 FUNCTIONS FOR RECEIVE ■ Noise reduction The noise reduction function reduces noise components and picks out desired signals which are buried in noise. The received signals are converted to digital signals and then the desired signals are separated from the noise. q Push the [NR] to turn the noise reduction ON. [NR] for main [NR] for sub • [NR] indicator above their switch lights green. w Rotate the [NR] control to adjust the noise reduction level.
FUNCTIONS FOR RECEIVE 5 ■ Notch function This transceiver has auto and manual notch functions. The auto notch function automatically attenuates more than 3 beat tones, tuning signals, etc., even if they are moving. The manual notch can be set to attenuate a frequency via the [NOTCH] control. The auto notch can be used in SSB, AM and FM modes. The manual notch can be used in SSB, CW, RTTY, PSK and AM modes.
FUNCTIONS FOR TRANSMIT Section ■ VOX function …………………………………………………………… D Using the VOX function …………………………………………… D Adjusting the VOX function ………………………………………… D VOX set mode ……………………………………………………… ■ Break-in function ………………………………………………………… D Semi break-in operation …………………………………………… D Full break-in operation ……………………………………………… ■ ∂TX function …………………………………………………………… D ∂TX monitor function ………………………………………………… ■ Monitor function ………………………………………………………… ■ Transmit filter width setting (SSB only) ……………………………… ■
6 FUNCTIONS FOR TRANSMIT ■ VOX function The VOX (Voice-Operated Transmission) function switches between transmit and receive with your voice. This function provides an opportunity to input log entries into your computer, etc., while operating. D Using the VOX function q Select a phone mode (SSB, AM, FM). w Push [VOX/BK-IN] to turn the VOX function ON or OFF. [VOX/BK-IN] • “VOX” appears while the VOX is in use. • [VOX/BK-IN] indicator above this switch lights green.
FUNCTIONS FOR TRANSMIT 6 ■ Break-in function The break-in function is used in CW mode to automatically toggle the transceiver between transmit and receive when keying. The IC-7800 is capable for full break-in or semi break-in. D Semi break-in operation During semi break-in operation, the transceiver selects transmit when keying, then automatically returns to receive after a pre-set time from when you stop keying. [KEY SPEED] (inner control) q Push [CW] to select CW or CW-R mode.
6 FUNCTIONS FOR TRANSMIT ■ ∂TX function The ∂TX function shifts the transmit frequency up to ±9.999 kHz in 1 Hz steps (10 Hz steps when cancelling the 1 Hz step readout) without moving the receive frequency. • See (3 on p. 1-11 for function description. q Push [∂TX]. [RIT/∂TX] [∂TX] •“ ” appears. w Rotate [RIT/∂TX]. e To reset the ∂TX frequency, push [CLEAR] for 1 sec. • Push [CLEAR] momentarily to reset the RIT frequency when the quick RIT/∂TX clear function is ON. (p.
FUNCTIONS FOR TRANSMIT 6 ■ Transmit filter width setting (SSB only) The transmit filter width for SSB mode can be selected from wide, middle and narrow. ➥ During USB or LSB mode selection, push [COMP] for 1 sec. several times to select the desired transmit filter width from wide, middle and narrow. [COMP] • The filter functions regardless of the speech compressor use. • The following filters are specified as the default. Each of the filter width can be re-set in level set mode. (p.
6 FUNCTIONS FOR TRANSMIT ■ Split frequency operation Split frequency operation allows you to transmit and receive in the same mode on two different frequencies. The split frequency operation is basically performed using 2 frequencies on the main and sub readouts. The following is an example of setting 21.290 MHz for receiving and 21.310 MHz for transmitting. q Set 21.290 MHz (USB) in VFO mode. w Push [SPLIT] momentarily, then push [M=S] for 1 sec.
FUNCTIONS FOR TRANSMIT 6 ■ Quick split function When you find a DX station, an important consideration is how to set the split frequency. When you push the [SPLIT] switch for 1 sec., split frequency operation is turned ON, the sub readout is equalized to the main readout frequency and enters standby for transmit frequency input. This shortens the time needed to start split frequency operation. The quick split function is ON by default. For your convenience, it can be turned OFF in set mode. (p.
VOICE RECORDER FUNCTIONS Section 7 ■ About digital voice recorder …………………………………………… 7-2 ■ Recording a received audio …………………………………………… 7-3 D Basic recording ……………………………………………………… 7-3 D One-touch recording ………………………………………………… 7-3 ■ Playing the recorded audio …………………………………………… 7-4 D Basic playing ………………………………………………………… 7-4 D One-touch playing …………………………………………………… 7-4 ■ Protect the recorded contents ………………………………………… 7-5 ■ Erasing the recorded contents ………………………………………… 7-5 ■ Recording a message for transmit
7 VOICE RECORDER FUNCTIONS ■ About digital voice recorder The IC-7800 has digital voice memories, up to 4 channels for transmit, and up to 20 channels for receive. A maximum message length of 30 sec. can be recorded into a receive channel and the total message length of up to 209 sec., and a total message length of up to 99 sec. can be recorded in transmit channels.
VOICE RECORDER FUNCTIONS 7 ■ Recording a received audio Up to 20 channels of receive voice memories are available in the IC-7800. And the total audio length of up to 209 sec. can be recorded in receive channels. However, the maximum recordable length into a channel is 30 sec. This voice recorder records not only the received audio, but also the information that the set operating frequency, mode, and the recording time for your future reference as the memory names.
7 VOICE RECORDER FUNCTIONS ■ Playing the recorded audio D Basic playing q Push [EXIT/SET] several times to close a multi-function screen, if necessary. w Push [F-2•VOICE] to call up the voice recorder screen. • Previously selected screen, TX or RX memory, is displayed. If the TX memory channel (T1–T4) appears, push [F-7•T/R] to select RX memory channel. e Push [F-1•Y] or [F-2•Z] to select the desired voice memory to playback. r Push [F-3•PLAY] to start playback.
VOICE RECORDER FUNCTIONS 7 ■ Protect the recorded contents The protect function is available to protect the recorded contents from accidental erasing, such as over-record, etc. q Call up the voice recorder screen, RX memory. w Push [F-1•Y] or [F-2•Z] to select the desired voice memory. e Push [F-4•PROTECT] to turn the protect function ON and OFF. •“ ” indicator appears when the contents is protected. r Push [EXIT/SET] twice to exit the voice recorder screen.
7 VOICE RECORDER FUNCTIONS ■ Recording a message for transmit To transmit a message using a voice recorder, record the desired message in advance as described below. The IC-7800 has digital voice memories for transmission, up to 4 channels and the total message length of up to 99 sec. can be recorded. D Recording q Push [EXIT/SET] several times to close a multi-function screen, if necessary. w Push [F-2•VOICE] to call up the voice recorder screen. e Push [EXIT/SET] to select voice recorder menu.
VOICE RECORDER FUNCTIONS 7 ■ Programming a memory name Memory channels can be tagged with alphanumeric names of up to 20 characters each. Capital letters, small letters, numerals, some symbols (! # $ % & ¥ ? “ ‘ ` ^ + – ✱ / . , : ; = < > ( ) [ ] { } | _ ~ @) and spaces can be used. (See the table below.) q Record a message as described in page 7-6. w During the voice mic. record screen indication, push [F-5•NAME] to enter memory name edit condition.
7 VOICE RECORDER FUNCTIONS ■ Sending a recorded message q Push [EXIT/SET] several times to close a multi-function screen, if necessary. w Select a phone mode by pushing [SSB] or [AM/FM]. e Push [F-2•VOICE] to call up the voice recorder screen. • If the receive voice memory channel appears, push [F-7•T/R] to select TX memory channel (T1–T4). r Push the desired memory channel switch, [F-1•T1] to [F-4•T4], momentarily to transmit the contents.
VOICE RECORDER FUNCTIONS 7 ■ Voice set mode Sets the automatic monitor function, short play and normal recording times for voice recorder. q Push [EXIT/SET] several times to close a multi-function screen, if necessary. w Push [F-2•VOICE] to call up the voice recorder screen. e Push [EXIT/SET] to select voice recorder menu. r Push [F-7•SET] to select voice set mode screen. t Push [F-1•Y] or [F-2•Z] to select the desired item. y Rotate main dial to set the desired condition or value.
7 VOICE RECORDER FUNCTIONS ■ Saving a voice memory into the CF memory card D Saving the received audio memory The recorded RX memory contents can be saved into the CF (Compact Flash) memory card. q During voice recorder RX memory screen indication, push [F-6•SAVE] to select voice file save screen. [F-6•SAVE] [F-7•WIDE] • Previously selected screen, TX or RX memory, is displayed. If the TX memory channel (T1–T4) appears, push [F-7•T/R] to select RX memory channel.