- DL manuals
- Icom
- Transceiver
- IC-7600
- Instruction Manual
Icom IC-7600 Instruction Manual
Summary of IC-7600
Page 1
Instruction manual hf/50 mhz transceiver i7600
Page 2
I foreword thank you for making the ic-7600 your radio of choice. We hope you agree with icom’s philosophy of “technology first.” many hours of research and devel- opment went into the design of your ic-7600. D features m ultimate receiver performance: third-order inter- cept (ip3) of +30 dbm (hf ba...
Page 3
Precautions r warning high rf voltage! Never attach an antenna or internal antenna connector during transmission. This may result in an electrical shock or burn. R warning! Never operate the transceiver with a headset or other audio accessories at high volume levels. Hearing experts advise against c...
Page 4: N Front Panel
Q power switch [power•timer] (p. ??) while transceiver’s power is off: ± push to turn the transceiver power on. • turn the optional dc power supply on in advance. • the indicator on this switch lights green when pow- ered on. While transceiver’s power is on: ± push momentarily to toggle the timer fu...
Page 5
Y microphone connector [mic] accepts the supplied or optional microphone. • see p. ?? For appropriate microphones. • see p. ?? For microphone connector information. U mic gain control [mic gain] (p. ??) adjusts microphone input gain. • the transmit audio tone in ssb, am and fm modes can be adjusted ...
Page 6
!1 break-in delay control [bk-in delay] (p. ??) for cw semi-break-in operations. Push short delay for high speed keying (2 dot) long delay for slow speed keying (13 dot) !2 electronic cw keyer speed control [key speed] (p. ??) adjusts keying speed for the internal electronic cw keyer from 6 wpm (min...
Page 7
Mf3 (multi-function 3 switch) p.Amp switch (p.Amp) or bypasses them. (p. ??) • “p. Amp1” activates 10 db preamp. • “ p. Amp2” activates 16 db high-gain pre- amp. • “p. Amp off” can also be selected. ± turns the preamp function off when pushed and held for 1 sec. (p. ??) what is the preamp? The pream...
Page 8
!4 noise reduction switch [nr] (p. ??) • the indicator on this switch lights green when the func- tion is activated. !5 monitor switch [monitor] (p. ??) monitors your transmitted if signal. • the cw sidetone functions regardless of the [moni- tor] switch setting in cw mode. • the indicator on this s...
Page 9
@1 mode switches selects the desired mode. (p. ??) • announces the selected mode via the speech synthe- sizer. (p. ??) [ssb] ± selects usb and lsb modes alternately when pushed. ± selects ssb data mode (usb-d, lsb-d) when pushed and held for 1 sec. In ssb mode. • in ssb data mode, push to return to ...
Page 10
#0 transmit indicator [tx] lights red while transmitting. #1 receive indicator [rx] lights green while receiving a signal and when the squelch is open. #2 lcd function display (p. ??) shows the operating frequency, function switch menus, spectrum scope screen, memory list screen, set mode settings, ...
Page 11
$0 passband tuning controls [twin-pbt] (p. ??) adjusts the receiver’s if filter “passband width” via the dsp. • passband width and shift frequency are displayed in the multi-function display. • push and hold [pbt-clr] for 1 sec. To clear the pbt settings. • adjustment range is set to half of the if fi...
Page 12
$6 memory up/down switches [∫]/[√] (p. ??) ± push to select the desired memory channel. • memory channels can be selected both in vfo and memory modes. ± push to select the desired memory channel di- rectly after pushing [f-inp ent] and a memory channel number. $7 memo pad-write switch [mp-w] (p. ??...
Page 13
%3 cw pitch control [cw pitch] (outer control; p. ?? ) shifts the received cw audio pitch and the cw side tone pitch without changing the operating fre- quency. Lower frequency higher frequency %4 manual notch filter control [notch] (inner control; p. ?? ) varies the notch frequency of the manual no...
Page 14: N Rear Panel
Q ground terminal [gnd] (p. ??) connect this terminal to a ground to prevent electri- cal shocks, tvi, bci and other problems. W antenna connector 1 [ant1] e antenna connector 2 [ant2] (pgs. ??, ??) accept a 50 ø antenna with a pl-259 plug connec- tor. When using an optional ah-4 hf/50 mhz auto- mat...
Page 15
I meter jack [meter] (p. ??) outputs a signal showing received signal strength, transmit output power, vswr, alc, speech com- pression, v d or i d level for external meter indica- tion. O straight key jack [key] (p. ??) accepts a straight key or external electronic keyer with 1 ⁄ 4 inch standard plu...
Page 16: N Lcd Display
Q s/rf meter (pgs. ??, ??) shows the signal strength while receiving. Shows the relative output power, swr, alc, vd, id or compression levels while transmitting. • a total of 3 meter types are available. • standard meter • edgewise meter • bar meter w if filter indicator (p. ??) shows the selected i...
Page 17
O rtty tuning indicator shows the tuning condition in rtty mode. !0 mode indicator shows the selected mode. !1 frequency readouts shows the operating frequency. • gray characters are used for non-active readout. !2 memory channel readouts ± shows the selected memory channel contents in vfo mode. ± s...
Page 18: N Screen Menu Arrangement
The following screens can be selected from the start up screen. Choose the desired screen using the fol- lowing chart. Pushing [exit/set] several times returns to the start up screen. See p. ?? For set mode arrangement. • spectrum scope screen (p. ??) • voice recorder screen (p. ??) • rtty decoder s...
Page 19: N Unpacking
N unpacking after unpacking, immediately report any damage to the delivering carrier or dealer. Keep the shipping cartons. For a description and a diagram of accessory equip- ment included with the ic-7600, see ‘supplied acces- sories’ on p. ?? Of this manual. N selecting a location select a locatio...
Page 20: N Required Connections
N required connections d front panel twin-pbt rit/ tx Ӡ notch cw pitch voice memory bal nr af rf/sql mic gain rf power bk-in delay key speed timer phones elec-key mic auto tune gene f-inp 1.8 3.5 1 2 14 5 18 6 7 3 24 8 28 9 50 0 ent 4 7 10 21 change ts xfc split dual watch main /sub m.Scope vfo/memo...
Page 21: N Advanced Connections
18 2 installation and connections 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 n advanced connections d front panel twin-pbt rit/ tx Ӡ notch cw pitch voice memory bal nr af rf/sql mic gain rf power bk-in delay key speed timer phones elec-key mic auto tune gene f-inp 1.8 3.5 1 2 14 5 18 6 7 ...
Page 22: N Usb Connection
D rear panel— 2 1 2 ant dc 13.8v x-verter rx-ant acc tuner in out alc send key 1 2 meter remote ext-sp external keypad connects an external keypad for direct voice memory, keyer memory, rtty tx memory and psk tx memory controls. 1.5 k ø ±5% 1.5 k ø ±5% 2.2 k ø ±5% 4.7 k ø ±5% s1 (t1/m1) s2 (t2/m2) s...
Page 23: N Power Supply Connections
N power supply connections use a dc power supply with a 23 a capacity when operating the transceiver with ac power. Refer to the diagrams below. Caution: before connecting the dc power cable, check the following important items. Make sure: • the [power] switch is off. • output voltage of the power s...
Page 24
N linear amplifier connections d connecting the ic-pw1/euro exciter 1 1&2 to an antenna acc-1 ant ant2 ant1 acc 2 input1 input2 remote gnd ic-pw1/euro ac outlet (non-european versions : 100–120/220–240 v european version : 230 v) transceiver remote remote control cable (supplied with the ic-pw1/euro)...
Page 25
N transverter jack information when 2 to 13.8 v is applied to pin 6 of [acc 2], the [x-verter] connector is activated for transverter op- eration and the antenna connectors do not receive or transmit any signals. While receiving, the [x-verter] connector can be acti- vated as an input terminal from ...
Page 26: N Microphones
N microphone connector information (front panel view) y gnd (ptt ground) t ptt r main readout squelch switch q microphone input w +8 v dc output e frequency up/down i main readout af output (varies with [af]) gnd (microphone ground) u [mic] pin no. Function description w +8 v dc output max. 10 ma e ...
Page 27
N accessory connector information acc 1 pin no. Name description specifications 1 2 3 4 5 6 7 8 1 rtty controls rtty keying “high” level “low” level output current : more than 2.4 v : less than 0.6 v : less than 2 ma 2 gnd connects to ground. Connected in parallel with acc 2 pin 2. 3 send input/outp...
Page 28: Basic Operation
N before first applying power before first applying power, make sure all connec- tions required for your system are complete by refer- ring to chapter 2. After all connections have been done, set controls and switches as shown in the figure below. Twin-pbt rit/ tx Ӡ notch cw pitch voice memory bal nr...
Page 29: N Main/sub Band Selection
N selecting vfo/memory mode ± push [vfo/memo] to switch between vfo and memory modes. • “vfo” appears when in vfo mode, or the selected memory channel number appears when in memory mode. • pushing and holding [vfo/memo] for 1 sec. Transfers the contents of the selected memory channel to vfo mode. (p...
Page 30
N selecting an operating band the triple band stacking register provides 3 memories for each band key, storing frequency and mode infor- mation. This function is convenient when you operate 3 oper- ating modes on one band. For example, one register is used for a cw frequency, another for a ssb fre- ...
Page 31: N Frequency Setting
N frequency setting the transceiver has several tuning methods for con- venient frequency tuning. D tuning with the main dial q push the desired band key on the keypad 1–3 times. • 3 different frequencies can be selected on each band with the band key. (see previous page “using the band stacking reg...
Page 32
D about 5 mhz band operation (usa version only) operation on the 5 mhz band is allowed on 5 discrete frequencies and must adhere to the following: • usb mode • maximum of 50 watts erp (effective radiated power) • 2.8 khz bandwidth it’s your responsibility to set all controls so that trans- mission i...
Page 33
D selecting 1 hz step a minimum tuning step of 1 hz can be used for fine tuning. Q push [ts] to turn the quick tuning function off. W push and hold [ts] for 1 sec. To turn the 1 hz tun- ing step on and off. Note: • rit and/or ∂tx also functions in 1 hz tuning step when used. • the frequency is chang...
Page 34
D band edge warning beep when you tune outside of an amateur band’s fre- quency range, a warning beep sounds. This function can be turned off in set mode, if desired. Q push [exit/set] several times to close a multi- function screen, if necessary. W push [set] (f-6) to select set mode menu screen. •...
Page 35: N Operating Mode Selection
N operating mode selection ssb (usb/lsb), ssb data (usb data/lsb data), cw, cw reverse (cw-r), rtty, rtty reverse (rtty-r), psk, psk reverse (psk-r), am, am data, fm and fm data modes are available in the ic-7600. Push the desired mode switch momentarily to select a mode of operation. See the diagra...
Page 36
N squelch and receive (rf) sensitivity adjusts the rf gain and squelch threshold level. The squelch removes noise output from the speaker (closed position) when no signal is received. • the squelch is particularly effective for am and fm. It is also available for other modes. • 12 to 1 o’clock posit...
Page 37: N Volume Setting
N volume setting ± rotate [af] control clockwise to increase, counter- clockwise to decrease the audio output level. Increases decreases n meter indication selection the transceiver has 6 transmit meter functions for your convenience. ± push [meter] (mf2) several times to select the desired meter. I...
Page 38
D meter type selection a total of 3 meter types are available in the ic-7600— standard, edgewise and bar meters. Follow the instructions below for the meter type selec- tion. Q push [exit/set] several times to return to normal screen, if necessary. W push [set] (f-6), then push [disp] (f-3) to selec...
Page 39: N Basic Transmit Operation
N basic transmit operation before transmitting, monitor your selected operating frequency to make sure transmitting won’t cause interference to other stations on the same frequency. It’s good amateur practice to listen first, and then, even if nothing is heard, ask “is the frequency in use?” once or...
Page 40
D drive gain adjustment the drive gain is active for all modes other than ssb mode with speech compressor off. Before transmitting, monitor your selected operat- ing frequency to make sure transmitting won’t cause interference to other stations on the same frequency. Q push [exit/set] several times ...
Page 41: Receive And Transmit
N functions for cw operation d about cw reverse mode cw-r (cw reverse) mode uses the opposite side band to receive cw signals. Use when interfering signals are near a desired sig- nal and you want to use cw-r to reduce the interfer- ence. ± during cw mode, push [cw] to select cw and cw-r mode. D abo...
Page 42
D apf (audio peak filter) operation the apf changes the audio frequency response by boosting a particular frequency to enhance a desired cw signal. Q during cw mode, push [apf/tpf] to turn the audio peak filter on and off. • “ ” appears in the display and the indicator on this switch lights green wh...
Page 43
40 4 receive and transmit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 n electronic keyer functions the ic-7600 has a number of convenient functions for the built-in electronic keyer that can be accessed from the memory keyer menu. Q during cw mode, push [exit/set] several times to return t...
Page 44
D memory keyer screen pre-set characters can be sent using the keyer send menu. Contents of the memory keyer are set using the edit menu. • transmitting q during cw mode operation, push [keyer] (f-3) to select memory keyer screen. W push [transmit] to set the transceiver to trans- mit, or set the br...
Page 45
D editing a memory keyer the contents of the memory keyer memories can be set using the memory keyer edit menu. The memory keyer can memorize and re-transmit 4 cw key codes for often-used cw sentences, contest serial numbers, etc. Total capacity of the memory keyer is 70 charac- ters per memory chan...
Page 46
D contest number set mode this menu is used to set the contest (serial) number and count-up trigger, etc. • setting contents q during cw mode operation, push [keyer] (f-3) to select memory keyer screen. W push [exit/set] to select memory keyer menu, then push [001] (f-3) to select contest serial num...
Page 47
D keyer set mode this set mode is used to set the memory keyer repeat time, dash weight, paddle specifications, keyer type, etc. • setting contents q during cw mode operation, push [keyer] (f-3) to select memory keyer screen. W push [exit/set] to select memory keyer menu, then push [cw key] (f-4) to...
Page 48
D keyer set mode (continued) paddle polarity normal this item sets the paddle dot-dash polarity. • normal and reverse polarity can be selected. Keyer type ele-key this item selects the keyer type for [elec-key] connector on the front panel. • elec-key, bug-key and straight key can be selected. (defa...
Page 49: N Rtty (Fsk) Operation
N rtty (fsk) operation a dsp-based high-quality baudot rtty encoder/ decoder is built-in to the ic-7600. When connecting a pc keyboard (p. ??), rtty operation can be per- formed without an external rtty terminal, tnc or pc. If you would rather use your rtty terminal or tnc, consult the manual that c...
Page 50
D about rtty reverse mode received characters are occasionally garbled when the received signal is reversed between mark and space tones. This reversal can be caused by incor- rect tnc connections, setting, commands, etc. To receive a reversed rtty signals correctly, select rtty-r (rtty reverse) mod...
Page 51
D functions for the rtty decoder indication q push a band key to select the desired band. W push [rtty/psk] to select rtty. • after rtty mode is selected, push and hold [rtty/ psk] for 1 sec. To toggle between rtty and rtty-r modes. • “rtty” or “rtty-r” appears. E push [decode] (f-3) to display the ...
Page 52
D rtty memory transmission pre-set characters can be sent using the rtty mem- ory. Contents of the memory are set using the edit menu. Q during rtty mode operation, push [decode] (f-3) to select rtty decode screen. W push [tx mem] (f-3) to select rtty memory screen. E push [1–4/5–8] (f-6) to select ...
Page 53
D editing rtty memory the contents of the rtty memories can be set using the memory edit menu. The memory can store and re-transmit 8 rtty message for often-used rtty information. Total capacity of the memory is 70 char- acters per memory channel. • programming contents q during rtty mode operation,...
Page 54
D rtty decode set mode this set mode is used to set the decode usos func- tion, time stamp setting, etc. • setting contents q during rtty mode operation, push [decode] (f-3) to select rtty decode screen. W push [] (f-1) to select the second rtty decode menu, then push [set] (f-5) to select rtty deco...
Page 55
Rtty tx usos on explicitly inserts the figs character even though it is not required by the receiving station. • on : inserts figs. • off : does not insert figs. Rtty auto cr+lf by tx on selects the automatic new line code (cr+lf) trans- mission capability. • on : transmits cr+lf code once. • off : ...
Page 56
D data saving the contents of the rtty memory/received signal can be saved into the usb-memory. Q during rtty decode screen indication, push [] (f-1) to select the rtty decode sec- ond menu. W push [save] (f-4) to select decode file save screen. E change the following conditions if desired. • file n...
Page 57: N Psk Operation
N psk operation a high-quality dsp-based psk encoder/decoder is built-in to the ic-7600. When connecting a pc key- board (p. ??), psk operation can be performed with- out psk software installed on your pc. If desired, you can also use your psk software; con- sult the manual that comes with the softw...
Page 58
D about bpsk and qpsk modes bpsk and qpsk modes are available for psk. • bpsk (binary phase shift keying) mode is the most commonly used mode. • qpsk (quadrature phase shift keying) mode has error correction capability to provide better decoding than bpsk mode in marginal condition. However, more ac...
Page 59
D functions for the psk decoder indication q push a band key to select the desired band. W push [rtty/psk] to select psk. • after psk mode is selected, push and hold [rtty/ psk] for 1 sec. To toggle between psk and psk-r modes. • “psk” or “psk-r” appears. E push [decode] (f-3) to display the decode ...
Page 60
D psk memory transmission pre-set characters can be sent using the psk mem- ory. Contents of the memory are set using the edit menu. Q during psk mode operation, push [decode] (f-3) to select psk decode screen. W push [tx mem] (f-3) to select psk memory screen. E push [1–4/5–8] (f-6) to select memor...
Page 61
D editing psk memory the contents of the psk memories can be set using the memory edit menu. The memory can store and re-transmit 8 psk message for often-used psk infor- mation. Total capacity of the memory is 70 characters per memory channel. • programming contents q during psk mode operation, push...
Page 62
D psk decode set mode this set mode is used to set the decode usos func- tion, time stamp setting, etc. • setting contents q during psk mode operation, push [decode] (f-3) to select psk decode screen. W push [] (f-1) to select the second psk decode menu, then push [set] (f-5) to select psk decode se...
Page 63
Psk time stamp (frequency) off selects the operating frequency display for time stamp usage. Note: the frequency won’t be displayed when “off” is selected in “psk time stamp” as below left. • on : displays the operating frequency. • off : no operating frequency display. Psk font color (receive) 128 ...
Page 64
D data saving the contents of the psk memory/received signal can be saved into the usb-memory. Q during psk decode screen indication, push [] (f-1) to select the psk decode sec- ond menu. W push [save] (f-4) to select decode file save screen. E change the following conditions if desired. • file name...
Page 65: N Repeater Operation
N repeater operation a repeater retransmits a received signal on a differ- ent frequency. When using a repeater, the transmit frequency is shifted from the receive frequency by an offset frequency. A repeater can be accessed using split frequency operation with the transmit frequency shifted to the ...
Page 66: N Tone Squelch Operation
N tone squelch operation the tone squelch opens only when receiving a sig- nal containing a matching subaudible tone. You can silently wait for calls from group members using the same tone. Q set the desired frequency band and select fm mode. W push [tone] (mf7) to turn the tone squelch func- tion o...
Page 67
N data mode (afsk) operation when operating amtor or packet with your tnc and/or pc software, consult the manual that comes with the tnc and/or the software. Q connect a pc and tnc to the transceiver. (p. ??) w push a band key to select the desired band. E push [ssb] or [am/fm] to select the desired...
Page 68: N Spectrum Scope Screen
N spectrum scope screen this dsp-based spectrum scope allows you to dis- play the frequency and relative signal strength of received signals on the strengths of signals. The ic- 7600 has two modes for the spectrum display— one is center mode, and the other is fixed mode. In addition, the ic-7600 has...
Page 69
D fixed mode displays signals within the specified frequency range. Conditions on the selected frequency band can be observed at a glance when using this mode. Q push [exit/set] several times to close a multi- function screen, if necessary. W push [scope] (f-1) to select the scope screen. E push [ce...
Page 70
D mini scope screen indication the mini scope screen can be displayed with another screen display, such as set mode menu, decode screen, memory list screen, etc. Simultaneously. Q set the scope mode (center or fixed), marker, attenuator, span, etc. In advance. (pgs. ??, ??) w push and hold [main/sub...
Page 71
D scope set mode (continued) scope during tx (center type) on turn display of the transmit signal on and off. Note: transmit signal display is available for the center mode only. Max hold on turn the peak level hold function on and off. Center type display filter center select the center frequency o...
Page 72
D scope set mode (continued) ( ± 25k) fast select the sweep speed for the ±25 khz span selec- tion from slow, mid and fast. ( ± 50k) fast select the sweep speed for the ±50 khz span selec- tion from slow, mid and fast. ( ± 100k) fast select the sweep speed for the ±100 khz span selection from slow, ...
Page 73
D scope set mode (continued) ( 8.00 − 11.00) 10.100 − 10.150 mhz set the scope edge frequencies for fixed mode scope when the 8 to 11 mhz band is selected. • set the frequencies within 8.000 to 11.000 mhz range in 1 khz steps. As edge frequencies are set, the other edge fre- quency will be automatic...
Page 74
D scope set mode (continued) (26.00 − 30.00) 28.000 − 28.500 mhz set the scope edge frequencies for fixed mode scope when the 26 to 30 mhz band is selected. • set the frequencies within 26.000 to 30.000 mhz range in 1 khz steps. As edge frequencies are set, the other edge fre- quency will be automat...
Page 75: N Preamplifier
N preamplifier the preamp amplifies received signals in the receiver front end, to improve the s/n ratio and sensitivity. Set this to preamp 1 or preamp 2 when receiving weak signals. ± push [p.Amp] (mf3) several times to set the pre- amp off, preamp 1 on or preamp 2 on. ± push and hold [p.Amp] (mf3)...
Page 76: N Rit Function
N rit function the rit (receive increment tuning) function com- pensates for off-frequency operation of the received station. The function shifts the receive frequency up to ±9.99 khz in 10 hz steps without moving the trans- mit frequency. Q push [rit] to turn the rit function on and off. • “ ” and ...
Page 77: N Agc Function
N agc function the agc (auto gain control) controls receiver gain to produce a constant audio output level even when the received signal strength varies greatly. The transceiver has 3 preset agc characteristics (time constant: fast, mid, slow) for non-fm mode. The fm mode agc time constant is fixed ...
Page 78: N Twin Pbt Operation
N twin pbt operation ssb/cw/rtty/psk/am pbt (passband tuning) electronically narrows the if passband width by shifting the if frequency slightly outside of the if filter passband to reject interference. The ic-7600 uses dsp for the pbt function. Moving both [twin-pbt] controls to the same position s...
Page 79: N If filter Selection
N if filter selection the transceiver has 3 passband width if filters for each mode. 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 5...
Page 80
D roofing filter selection the ic-7600 has 3, 6 and 15 khz roofing filters at the 1st if frequency. The roofing filter provides interfer- ence reduction from nearby strong signals. Q push and hold [filter] for 1 sec. To enter filter set screen. W select any mode except fm. E push [roofing] (f-5] to se...
Page 81
D filter shape set mode (continued) hf ssb (600hz – ) sharp select the filter shape for ssb mode in hf bands. The set filter shape is automatically used only when the if filter is set to 600 hz or wider. Ssb-d (600hz – ) sharp select the filter shape for ssb data mode in hf bands. The set filter sha...
Page 82: N Dualwatch Operation
N dualwatch operation dualwatch monitors 2 frequencies simultaneously. During dualwatch, both frequencies should be on the same band, because the bandpass filter in the rf cir- cuit is selected for the main readout frequency. Q set a desired frequency into the main band. W push and hold [dualwatch] ...
Page 83
• scanning during dualwatch scanning operates only for the main readout. To operate the scan during dualwatch, scan on the main readout and use the sub readout for your qso using both dualwatch and split frequency operation. Q program the desired programmed scan edges in the same amateur band. See p...
Page 84: N Noise Blanker
N noise blanker ssb/cw/rtty/psk/am the noise blanker eliminates pulse-type noise such as the noise from car ignitions. The noise blanker is not available for fm mode. ± push [nb] to turn the noise blanker function on and off. • the indicator on this switch lights green when when the noise blanker is...
Page 85: N Noise Reduction
N noise reduction the noise reduction function reduces random noise components and enhances desired signals which are buried in noise. The dsp performs the random noise reduction function. Q push [nr] to turn the noise reduction on. • the indicator on this switch lights green. W rotate the [nr] cont...
Page 86: N Notch Function
N notch function this transceiver has auto and manual notch func- tions. The auto notch function uses dsp to automatically attenuate up to 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 ...