Icom IC-775DSP [5/67] Function

Содержание

PANEL DESCRIPTION 1 VOX SEMI BREAK IN DELAY CONTROL DELAY p 36 Adjusts the transmit to receive switching delay time for VOX and CW semi break in operations DELAY Short delay for high speed keying Long delay for low speed keying S RF METER p 36 Shows the signal strength while receiving For transmit meter readings see the following table METER SWITCH METER p 36 Selects the S RF meter functions during trans mission as follows NOISE BLANKER SWITCH NB p 30 Turns the noise blanker ON and OFF SWR NB J g r y Y 1 POSITION Indicates the SWR over the transmission line o I OFF FUNCTION The noise blanker reduces pulse type noise such as that generated by automobile ignition systems This function in not effective for AM and FM or non pulse type noise NOISE BLANKER LEVEL CONTROL NB LEVEL p 30 Adjusts the noise blanker threshold level NB LEVEL Decreases Increases NOISE BLANKER WIDE SWITCH NB WIDE p 30 Selects the blanking time of the noise blanker circuit for a normal or wide blank width This switch can be assigned to the noise reduction on off switch in P set mode p 43 Po Indicates the relative RF output power in watts ALC Indicates the ALC level The ALC circuit begins to activate when the RF output power reaches a preset level COMP Indicates the compression level when the speech compressor is in use ID Indicates the drain s current of the final FET VD Indicates the drain s terminal voltage of the final FET ANTENNA SWITCHES ANT1 ANT2 p 45 Select antenna 1 or 2 Antenna selection can be programmed depending on the band selection such as above the 21 MHz band and below the 18 MHz band etc FUNCTION PREAMP ATTENUATOR SWITCH PREAMP ATT Selects one of 2 receive RF preamps one of 6 dB 12 dB or 18 dB attenuators or bypasses them The wide blank width effectively reduces wide pulse type noise known as woodpecker noise and key clicks from strong CW signals on nearby frequencies PRE1 activates the 10 dB preamp for HF all bands PRE2 activates the 16 dB high gain preamp for 21 MHz band and above NB WIDE I o OFF normal ON wide FUNCTION BLANK WIDTH CONTROL BLK WIDTH p 30 Adjusts the blank width of the wide noise blanker circuit To suppress echo noise from woodpecker signals etc rotate BLK WIDTH clockwise The setting is effective when NB WIDE is ON f NOTE When BLK WIDTH is turned too far clockwise receive audio is also blanked BLK WIDTH The preamp amplifies received signals in the front end circuit to improve the S N ratio and sensitivity Set this switch to PRE1 or PRE2 when receiving weak signals The attenuator prevents a desired signal from distorting when very strong signals are near the desired frequency or when very strong electric fields such as from a broadcasting station are near your location ANTENNA TUNER SWITCH TUNER p 39 Turns the antenna tuner ON or OFF bypass when pushed momentarily Starts to tune the antenna tuner manually when pushed for 2 sec When the tuner cannot tune the antenna the tuning circuit is bypassed automatically after 20 sec 2