Icom IC-775DSP [7/67] Function

Содержание

PANEL DESCRIPTION 1 DRIVE CONTROL DRIVE p 36 Adjusts the output level of the transmitter s drive stage Activates in CW RTTY and in SSB mode with COMP ON DRIVE Decreases Increases Recommended level for FM NR LEVEL SQL Recommended level for SSB CW RTTY and AM FUNCTION AGC OFF SWITCH AGC OFF Deactivates the AGC circuit Use when receiving a very weak signal near a strong signal P NOTE While AGC OFF is ON the S meter H does not function AGC OFF ApC OFF Ço I AGC activates 4 I AGC deactivates AGC CONTROL AGC Adjusts the time constant of the AGC circuit when AGC OFF is not turned ON AGC signal strong signal FUNCTION The AGC controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading etc Rotate AGC max counterclockwise for tuning and adjust it clockwise depending on the receiving condition AGC control does not function in FM mode The squelch removes noise output from the speaker closed condition when no signal is received The squelch is particularly effective for FM It is also available for other modes SETTING PROCEDURE Squelch setting When operating in FM first rotate the control fully counterclockwise Then rotate the control clockwise to the point where the noise just disappears This is the best position The squelch does not open for weak signals when it is set too deep DUALWATCH BALANCE CONTROL BALANCE inner control p 35 Adjusts the receiver gain balance of MAIN and SUB readout frequencies while in dualwatch BALANCER TONE Increases MAIN readout gain Increases SUB readout gain TONE CONTROL TONE outer control Varies the receive audio response BALANCE TONE Lower tone response NOISE REDUCTION LEVEL CONTROL NR LEVEL inner control p 29 For DSP equipped type Adjusts the noise reduction level or turns the noise reduction OFF Set for maximum read ability rNRT appears when the noise reduction is in use No function for the IC 775 without a DSP unit NR LEVELS SQL Decreases Increases OFF SQUELCH CONTROL SQL outer control Adjusts the squelch threshold level p 22 Deep rotation of the control moves the S meter pointer The pointer shows the signal strength which can open the squelch When CW pitch control is assigned to SQL in P set mode adjusts the received or monitored CW audio tone without changing the displayed frequency pgs 29 43 AF GAIN CONTROL AF inner control p 22 Varies the audio output level AF RF Decreases Increases No audio output Max audio output RF GAIN CONTROL RF outer control Adjusts the receiver gain This control should be set to the maximum clockwise position for normal use Shallow rotation of the control moves the S meter pointer The pointer shows the signal strength which can be received AF XRF Low gain Normal position The squelch cannot be closed in this case 4