User`s Manual
Contents
1. c eere eene nane neun u anu a nara uaa ua uaa uaS 17 Side Back Inputs L eue eeu c o ruunsnunERTEEHRARHEEREEERNEENSENAR ERE RM RENE EN R NH RE 18 Bottom Switches error errr rune anna u aun eee 19 Included Items correr erra r nena enun u aua nar nua Ra mau uasa ana 21 Accessories smmmnmmnnnnnnnnnnnnnnnnnnnnnnnnnn nn nn nn nn nn RaRRRRR RR n Rar RR Rau a uaS 21 Block Diagram Basic er erre eror e rune annu nu unu unu nau a un un ana 22 Basic Operation cere e err enun nue aa una nau aa Rar nara ana r aua Rua a uan 23 Mounting to Camera error rene e nuu u nn una una na uaa ua rna ua aua u Rana 23 Mounting to Tripod error rre nr ran u enu nana ra un ana r aua uana ana 24 Output Connection to Camera 2 rene ene n enne nana aa un an 25 Powering uusssssasaREnERNAMARENENAMKERENNNERNENARENANNNESRENNRSMRNANENERERNNNNENRNMMNNSENAR 26 Alkaline Battery Life eere erre errare enean annua nara a un an 26 Rechargeable Batteries esee eene e aene n nean u annua uas 26 Input Connections mmmmmmmnmnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 27 TIP L RING R Unbalanced Input ee eoe rennen 27 XLR L XLR R Balanced Input2. 2e eoru e nnn u nnn a na 45 Post Production Removing Right Track 46 AppendiX eme 48 Subscribe to the juicedLink Blog mmmmmmmmmmmmmnmennannnnnnnnnnnnnns 48 Care and Maintenance mmmmmmnmmnnmnnmnnmnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 48 Warranty Service and ReturnS mmmmmmmnmenmmnnmnnmnnnannnnnnnnnnnnnnnnnnn 48 Compliance sssssansmansenmsannsssusaussenscannenseunsenesesncennsennrenenensenness 48 DT454 XLR Adapter Preamplifier AGC Disabler Page 3 Before operating the unit please read this manual thoroughly Any future revisions will be posted on the website and available for download Get notified on new revisions of this User Manual product updates new product releases and tutorial videos Subscribe to the blog www juicedlink com blog index html Notes regarding documentation in this manual are as follows References to markings labels on the unit are denoted in underline bold For example HPF Warnings will be preceded with WARNING Warnings General WARNING Failure to read and observe notes and warnings may result in personal injury and or possible damage to this device and your other equipment This device as well as any device with a headphone amplifier is capable of driving the signal at levels that can be damaging to hearing Always operate the headphone volume at the lowest practical level Do not wear the headphones over
3. Subscribe at http www juicedlink com blog index htm For a camera which has manual control throttling the gain to about 1 3 full gain is a good place to start Different cameras may have a different sweet spot for lowest noise performance with decent dynamic range You will have to conduct some recording tests to experiment Some cameras do not have a meter and only coarse granularity of manual control such as a low medium and high setting Start with your camera s low setting and conduct some tests where your audio signal on the DT454 meter peaks splash into the 3 amber LED but do not hit or infrequently hit the 4 red LED If your camera has a meter then follow these steps to get started 1 Connect a mic to your DT454 and adjust the GAIN and TRIM volume potentiometer settings so that when you speak into your microphone the meter peaks splash to the 3 amber DT454 LED without illuminating the 4 red LED or infrequently doing so 2 Throttle back the camera gain until the peaks splash just past the 12dB full scale meter reading on the camera Now your DT454 and camera meters for the given camera setting are calibrated Make sure you turn down all of the TRIM potentiometers on the DT454 which do not have a microphone connected to its input Preamps without the impedance of a microphone connected to their input have a high impedance at the preamp input which results in the preamp
4. eere nera nena nnan 28 XLR L XLR R with Unbalanced Sources Wireless Etc 28 Phantom POWER scies auui E iK Ria RN Ra DR ARRA DD RR RD RR 29 Page 2 www juicedLink com MIC LINE Switches sssanmmnanmannanannnnanannananananananananananannnnnnnnnnne 31 MONO STEREO Switch Lc erre eene e neuen ununi nuu nana u una 32 PAN TO L NORM roro enun unu au unu unauuna nau uuR nana R Ran rua uaE 33 GAIN Settings smmmmmmmmmmnnmnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnne 34 TRIM Potentiometers mmmmnmmnnmnnmanmnnmnnmnmmnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 35 Camcorder Settings mmmmmmmmmmmnannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnne 36 Low Noise Performance mmmmmmnmmnmmnmmnnmnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 36 Dynamic Range Performance cerne enne anneau una nn una nan 36 AGC Disable ss sn RH EKERB RENE NEN EAE VENERE RENE DERE ERN nnn 37 PIOS E 38 Safety Mode Noise smmmmmmmmmmnmmmmmmmmnnmnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 39 Metering Setting the Appropriate Gain Trim Levels 41 Headphone Monitoring e eere eren nn enun a nun u rana nau ana 43 Playback Headphone Monitoring 2er enean enun an 43 Advanced Topics cere rr rr ree n enn u anu nn ana ann RR RRRRRR SERES nnn 45 Post Production Removing Tone
5. HI LO for XLR L XLR R balanced inputs Phantom PH power switch Generates either 48V or 12V in the power supply circuitry b Phantom voltage is not applied to the XLR input until the PH ON OFF switch is set to ON for the corresponding XLR L XLR R balanced input c Mics which work from 12V phantom power can considerably extend battery life 5 PH ON OFF switch routes the phantom voltage generated by the power supply circuit to the corresponding XLR L XLR R balanced input d Only apply phantom power to condenser mics which require phantom voltage e Never apply phantom power to unbalanced mic sources wireless mics etc or mixing boards 6 MONO combines the right and left inputs and presents the combination to each of the right and left outputs STEREO leaves the right and left inputs separated and only the corresponding input signal is presented to each the of the right and left outputs 7 PAN TO L combines the right and left input channels and presents the combination to the left output channel 8 METER sensitivity switch f Hl to be used when either you have manual control of the camera gain and have throttled back its noisy gain or if your are using the AGC Disable feature of the DT454 to force the camera gain to throttle back This setting is most commonly used for typical operation g LO setting when camera AGC is running with no efforts to throttle it back 9 AGC DISABLE feature of the DT454 to improve
6. Metering Setting the Appropriate Gain Trim Levels OFF OFF LO CI Mono Stereo m Pan to L Norm JOJUONW YOGAL q 10 07 duj 1oJuoy YORQAL q 10 yndu IW 10 ONIY diL Whenever your camera has its own meters the camera meters are the final arbiter for the appropriate level settings The meter on the DT454 will be used so that the signal peaks splash into the 3 amber LED but do not hit or infrequently hit the 4 red LED But the correct meter settings for the corresponding situation must be used The bottom of the unit has a METER switch The METER LO position has been calibrated for a typical camera with its AGC in operation When you want to optimize dynamic range instead of noise performance then you will want to take advantage of the camera s AGC See the Dynamic Range Performance section for more details The METER HI position has been calibrated for a typical camera using one of the AGC DISABLE approaches or a camera whose gain has been manually throttled back See the Low Noise Performance and AGC Disable sections for more details There are exceptions to these general rules Different camera platforms have different gain lineups and require adjustment of the meter Check to see if your camera is listed in the Notes on Specific Cameras section This list includes Canon 5D Markil Canon T2i 7D 1D Mark IV Get notified on User Manual and product updates Page 41
7. O 2 3 S d 10 ndul IW 104 ONIY dI L Get notified on User Manual and product updates Page 29 Subscribe at http www juicedlink com blog index html 1 Choose what function the phantom power generator circuit should perform by selecting PH OFF 12V 48V on the selector switch 2 Route the voltage produced by the phantom power generator circuit to the XLR input which requires phantom power with PH ON OFF switch for the corresponding XLR L or XLR R input The DT454 does not provide T Powering General Phantom Power Microphone Tips e f you are in the market for new microphones then consider o Amicrophone that works from phantom power only will be much shorter and lighter since it does not have the added weight length for the battery making it easer to boom or mount to camera when necessary o Consider a microphone that will work down to 12V phantom power This will considerably extend the battery life of the DT454 There are many excellent modern microphones with this capability e f your microphone will work from a battery already then operate the microphone from the battery instead of phantom power This is much more power efficient for the system and will result in longer battery life In some cases there are differences in the mic performance between phantom power and battery power But these differences are negligible and mostly have to do with the maximum SPL handling capability of the microph
8. POST PRODUCTION a Refer to the section Post Production Removing Right Track to remove the AGC Disable noise signal from the right recording track to leave you with the clean recorded left track The AGC Disable technique yields very good results and is a vast improvement beyond the camera s standard noisy performance However you should know that it will not be quite as good as a camera which already has manual gain control On our website you will find videos demonstrating the performance improvement of the AGC Disable technique Special note regarding Canon Cameras and Noise AGC Disable 1 The microphone input on the camera does not get activated until the camera begins to RECORD for the first time 2 Until you hit RECORD and activate the microphone input you will hear noise in the DT454 headphones Once you hit RECORD the noise in the headphones goes away and doesn t return until the camera power gets cycled 3 After the camera power gets cycled you will need to hit RECORD again to eliminate the noise in the headphones Return to Contents Get notified on User Manual and product updates Page 9 Subscribe at http www juicedlink com blog index htm Panasonic Lumix GH1 Different camera platforms with varying gain lineups and firmware implementations vary in terms of their required input signal level to optimize signal to noise while also having sufficient margin to headroom distortion The factory HI and LO
9. level settings see Meter section require use of the TRIM potentiometers volume control knobs near the full counter clockwise position where small changes in the potentiometer position result in large changes in signal because of the logarithmic nature of audio pots then you can switch the GAIN to the LO position to get back into the sweet spot of the potentiometer s adjustment range Check out the Metering section for more details for appropriate level settings For Playback Monitor settings see the Playback Monitor Section Return to Contents Page 34 Omissions Suggestions Contact Us www juicedLink com TRIM Potentiometers DT454 XLR Adapter Preamp AGC Disabler XLR L XLR R TIP L RING R PHONES OUT MIC LEVEL The Block Diagram illustrates where the TRIM potentiometers volume control knobs are located in the system When setting up the user will typically start with the GAIN in the HI position If you find that the correct level settings see Meter section require use of the TRIM potentiometers volume control knobs near the full counter clockwise position where small changes in the potentiometer position result in large changes in signal because of the logarithmic nature of audio pots then you can switch the GAIN to the LO position to get back into the sweet spot of the potentiometer s adjustment range Check out the Metering section for more details for appropriate level settings Return to Cont
10. meter settings try to balance the needs across platforms But the may not be optimal for every camera This section will describe some simple steps to get the DT454 meter more precisely calibrated to the gain needs of your camera while using the AGC Disable feature of the DT 454 We will use the known output signal level of the AGC Disable s noise signal for calibration So we will take the output of the DT454 with the noise signal and feed that back to the DT454 input Then you will adjust a potentiometer to a pre determined position and signal level Then you will use a small screwdriver to adjust one of the meter potentiometers so the meter is calibrated to that signal level Follow these steps NOTE We have posted a video on our website which may be helpful to illustrate steps in general However please refer to this user Manual for the exact details 1 CALIBRATE THE DT454 METER a Take the stereo minijack cable and connect one end to the DT454 OUT minijack and the other end to the DT454 TIP RING INPUT minijack b Set the AGC Disable switch to the NOISE setting Set MONO STEREO to STEREO and PAN TO L NORM to NORM Set the GAIN for the RING TIP INPUT to the LO setting on the bottom of the DT454 e On the front panel turn the RING R potentiometer volume control to the twelve o clock position ao ZA N 29 P a E 3 D ou D ur Ene f Set the METER switch to the LO position
11. minijack cable included 6 Headphone PHONES minijack output and volume control Return to Contents Get notified on User Manual and product updates Page 17 Subscribe at http www juicedlink com blog index htm Side Back Inputs 1 Camera mounting screw 1 4 20 a USE HEX KEY included and insert into the bottom of the screw to rotate the screw into the camera threads to mount to camera 2 9V battery tray 3 Audio Inputs XLR L left and XLR R right balanced mic or line inputs unbalanced capable 4 Audio Inputs TIP L left and RING R right unbalanced mic inputs or playback monitor inputs Return to Contents Page 18 Omissions Suggestions Contact Us www juicedLink com Bottom Switches INPUT INPUT TIP RING XLR L Q XLR L XLR R du 2 4 Mic jne gt H Mono Stereo 5 Pan to L Norm ON JOJUOW yoegq eld 10 07 AGC Disable U 2 do Q S o j U c gs z v 2 o w x 3 d o gt Le amp DIS or if camera gain can be throttled back B Read the instruction manual www juicedLink com Made in USA Get notified on User Manual and product updates Page 19 Subscribe at http www juicedlink com blog index htm 1 GAIN switch HI LO for TIP L RING R unbalanced inputs a Use LO setting when input is being used as a Playback Monitor MIC LINE switch settings for XLR L XLR R balanced inputs GAIN switch
12. on the bottom of the DT454 Page 10 Omissions Suggestions Contact Us www juicedLink com g Just above the LO lettering on the bottom of the DT454 locate small hole in the aluminum enclosure Behind this hole is a potentiometer that calibrates the meter sensitivity for the LO setting h Using a small screwdriver 1 16 adjust the LO METER potentiometer so the 3 LED is illuminated 2 WHILE RECORDING a Set the AGC Disable switch to the TONE setting the GH1 has some low frequency crosstalk so we have chosen the tone over noise AGC Disable technique b Set PAN TOL NORM switch to the PAN TO L position Since AGC Disable is being used and we are going to abandon the right track even though the tone is being used tones are evil c Use the LO meter setting and adjust the GAIN and TRIM volume potentiometer settings to keep the peaks below the red LED of the Meter d The other settings phantom power etc operate like any typical mixer 3 POST PRODUCTION a Refer to the section Post Production Removing Right Track to remove the AGC Disable signal from the right recording track to leave you with the clean recorded left track The AGC Disable technique yields very good results and is a vast improvement beyond the camera s standard noisy performance However you should know that it will not be quite as good as a camera which already has manual gain control On our website you will find videos d
13. possible for a battery to be so dead that it doesn t have enough juice to power the LOW BATT indicator circuitry or LED but it can still illuminate the PWR LED With such a nearly completely dead battery the unit will not operate even though the LED indicators may lead you to believe that it should Alkaline Battery Life Battery life varies and depends on numerous factors Use of phantom power takes up battery resources especially at 48V See the Phantom Power section for tips on optimizing power efficiency Here are some estimates for typical continuous usage from a fresh 9V alkaline battery No Phantom 7hrs With one 2mA mic 12V 5hrs With one 2mA mic 48V 2hrs Rechargeable Batteries The iPowerUS 9V Lithium Polymer is a good choice for a rechargeable battery http www ipowerus com Products DC9V500 DC9V500 htm These are nice because of their high capacity and fast recharge time The higher capacity also extends battery life Here is an estimate for typical continuous usage from a fresh battery of this type With one 2mA mic 48V 5hrs Return to Contents Page 26 Omissions Suggestions Contact Us www juicedLink com Input Connections The DT454 has facilities for individual control of 4 audio inputs TIP L RING R Unbalanced Input For details regarding Playback Monitoring see the Playback Monitoring section The TIP L RING R is an unbalanced stereo minijack input with individual TRIM controls for
14. signal to noise performance on cameras which do not have manual control h TONE injects a 20kHz tone into the camera s right track to spoof its i Safety Mode NOISE AGC Disable approach injects a broadband noise signal into the camera s right track to spoof its AGC algorithm into throttling back its noisy gain 10 20 thread for mounting DT454 on top of a tripod etc 11 Hex key receptacle USE HEX KEY included HERE TO TURN 4 20 SCREW INTO CAMERA FOR MOUNTING TO BOTTOM OF CAMERA D Return to Contents Page 20 Omissions Suggestions Contact Us www juicedLink com Included Items 1 Stereo minijack cable Use to connect mic output of DT454 to the mic input on the camera 2 Hex key USE HEX KEY TO TURN 4 20 SCREW INTO CAMERA FOR MOUNTING TO BOTTOM OF CAMERA Return to Contents Accessories TBD Return to Contents Get notified on User Manual and product updates Page 21 Subscribe at http www juicedlink com blog index htm Block Diagram Basic ke PHANTOM 12 48V i8 4 RIGHT Minijack Output Amplified Mic Level LEFT 4 Mono Stereo oPantoL o x RIGHT AGC DISABLE OFF TONE SAFETY NOISE I METERS Minijack Mic Playback Monitor Input TELE HI MO TRIM PHONES MONO 1 Return to Contents Page 22 Omissions Suggestions Contact Us www juicedLink com Mounting to Camera DT454 XLR Adapter Preamp AGC Disab
15. volume control knobs as the volume control for the headphones Plug the camera s AVout into the DT454 TIP L RING R input The AVout jack has 4 contacts so you can t use a standard 3 contact stereo miniplug cable Custom cables can be made Alternatively many cameras come with an AVout to RCA cable You can use an inexpensive Stereo 3 5mm Male to 2x RCA Female Y Cable see Hosa part numbers YRA 167 and YRA 154 If the NOISE AGC Disable approach was used then simply do not plug in the right red channel since this will be abandoned anyhow Get notified on User Manual and product updates Page 43 Subscribe at http www juicedlink com blog index htm Note many cameras will disable the live view display when you insert the plug into the camera s AV out jack So you will be able to monitor your audio clip through the DT454 However your camera may not allow you to simultaneously watch the clip on the camera LCD display If you are putting together a professional grade rig then you will probably be using an external monitor and you will plug your headphones into that instead of the DT454 In this case you will have audio together with your video from the external monitor If you are using the NOISE AGC Disable approach then simply do not plug in the right red channel into your monitor since this will be abandoned anyhow Return to Contents Page 44 Omissions Suggestions Contact Us www juicedLink com Post Prod
16. will bring up a frequency analysis window of your waveform iii Notice the tone amplitude is now knocked down Return to Contents Get notified on User Manual and product updates Page 45 Subscribe at http www juicedlink com blog index htm Post Production Removing Right Track The NOISE setting injects a broadband uncorrelated noise signal into the right recording track of the camera This leaves the left track clean for recording ee CRUE STE Right Track clean audio Left Track As such you will NOT be able to use the right track of the camera to record your microphones You may have also determined that you wish to use the TONE AGC Defeat signal and abandon the right recording track just the same In post you will need to delete the right track of audio containing the disable signal 2 Sony Vegas a Right click on the audio track b Select Channels c Select Left Only for the final mix 3 Final Cut Express a Delete the right track i Modify gt Link to unlink the audio from video li Modify gt Stereo Pair to unlink the right and left audio tracks iii Use mouse and select the right track iv Delete the right track b Copy the left track to the right track position i Make sure the Auto Toggle icon the icon to the right of the lock audio track icon for the right track is the only Auto Toggle icon activated ii Use mouse to select the left track iii Copy iv Paste Since the right track is
17. Start with all of the front panel potentiometers volume controls for XLR L XLR R etc turned all of the way down counterclockwise b Take the stereo minijack cable and connect one end to the DT454 OUT minijack and the other end to the DT454 TIP RING INPUT minijack Set MONO STEREO to STEREO and PAN TO L NORM to NORM Set the AGC Disable switch to the NOISE setting e Set the GAIN for the RING TIP INPUT to the LO setting on the bottom of the DT454 f On the front panel turn the RING R potentiometer volume control to the eleven o clock position as 29 oo ij t KS E Ne das Ne 4 c Fa G iu 6 7 g Set the METER switch to the LO position on the bottom of the DT454 Page 8 Omissions Suggestions Contact Us www juicedLink com h Just above the LO lettering on the bottom of the DT454 locate small hole in the aluminum enclosure Behind this hole is a potentiometer that calibrates the meter sensitivity for the LO setting i Using a small screwdriver 1 16 adjust the LO METER potentiometer so the 3 LED is illuminated b WHILE RECORDING a Set the AGC Disable switch to the NOISE setting b Set PAN TOL NORM switch to the PAN TO L position Since AGC Disable is being used c Use the LO meter setting and adjust the GAIN and TRIM volume potentiometer settings to keep the peaks below the red LED of the Meter d The other settings phantom power etc operate like any typical mixer c
18. al components We are proud of our product and are committed to servicing you to make your customer experience positive The Policies page on the juicedLink com website describes the details of the conditions for returns limited one year warranty and instructions for obtaining service for your product Return to Contents Compliance This device falls under the classification of FCC part 15 subpart B section 15 103 Please refer to the FCC part 15 manual for details on conditions of operation This device has also been tested to meet CE certification standards Return to Contents Page 48 Omissions Suggestions Contact Us www juicedLink com
19. an be plugged directly into XLR L and XLR R See the sections on Phantom Power and MIC LINE switches for more details XLR L XLR R with Unbalanced Sources Wireless Etc XLR L and XLR R are capable of interfacing with unbalanced sources However the proper XLR connector must be used This XLR connector must connect pin 1 with pin 3 which effectively grounds the balanced cold signal where the balanced hot signal remains for connection with the unbalanced source Without this special connector which connects pin1 to pin3 the signal will not be processed by the DT454 balanced receiver and the result is that there will be no output signal for this input WARNING Do not apply phantom power to any of these connectors which connect pin1 to pin3 You will be shorting out the phantom voltage and can potentially damage your equipment Here are some examples of connectors which connect pin 1 to pin 3 Rode VXLR Page 28 Omissions Suggestions Contact Us www juicedLink com Hosa GXM133 Ans Return to Contents Phantom Power Condenser microphones require a voltage to operate Some will take their own battery Others require that a voltage is generated by the mixer that the microphone is plugged into and that voltage gets transmitted up the microphone cable to power the condenser microphone element This is what is known as phantom power INPUT TIP RING XLR R 2 e S U D lt gt D
20. an the Canon firmware does It has meters that are always visible so those will be the final arbiter for level settings It allows you to control the camera s analog gain the Canon firmware throttles back the digital gain so you can achieve even lower signal to noise performance with a 5D running MagicLantern being fed by juicedLink low noise preamplifiers Since the DT454 has even more available gain than the juicedLink CX family of preamps the 5D analog gain can be set to OdB gain for even lower noise performance than was even achievable before Page 6 Omissions Suggestions Contact Us www juicedLink com That said most people will find that the performance with the Canon 2 0 4 firmware is more than sufficient for quality audio performance This will be your typical DT454 setup while using MagicLantern 1 SETUP OF DT454 this does not provide a guide of MagicLantern settings a Set the AGC Disable switch to the OFF position b Set PAN TO L NORM switch to the NORM position Since AGC Disable is not used c Since MagicLantern has its own built and meters you will not be using the METER on the DT454 you ll simply ignore them 2 WHILE RECORDING a Adjust the GAIN and TRIM volume potentiometer settings on the DT454 to keep the peaks below the red region of the MagicLantern meter displayed on the 5D b The other settings phantom power etc operate like any typical mixer 3 POST PRODUCTION a There s no need to follow any of
21. ddenly scream then it is best to utilize the AGC in the camera to provide you with the widest dynamic range of overload protection Fortunately in such environments like a birthday party the ambient noise level is high enough where you do not need to push your equipment to achieve its best available signal to noise performance anyway Use the camera s automatic AGC setting and set the METER to the LO position See the Metering section for more details as there may be exceptions Return to Contents Page 36 Omissions Suggestions Contact Us www juicedLink com AGC Disable OFF OFF LO 1 Viono Stereo Imm Pan to L Norm JOWUOW xoeqKeld 10 OT OFF Tone Noise AGC Disable U 2 G S J DU Cc ge O A oO W x j O m gt For cameras which do not have any manual override of their AGC Automatic Gain Control the DT454 offers 2 methods to defeat the AGC Signal to noise is improved when noisy camera amplifiers are throttled back and the noisy camera gain is replaced by clean gain in the juicedLink low noise preamplifiers This is easily accomplished with cameras having manual control of audio gain see the Low Noise Performance section However some cameras do not have manual control The DT454 AGC Disable feature forces the camera s AGC to throttle back its noisy gain by sending a signal either NOISE or TONE into the camera s right channel as illustrat
22. each enabling two separate microphones to be controlled and used Unless otherwise reconfigured by the PAN TO L or MONO switches TIP L is routed to the left output channel and RING R is routed to the right output channel This is illustrated in the Block Diagram section Multi channel wireless microphone systems with separate microphones on the miniplug ring tip output will interface directly into the TIP L RING R minijack input Unbalanced mics such as the Rode VideoMic Stereo VideoMic also interface directly into the TIP L RING R minijack input There may be occasions when you want to connect two mics which have their own mono miniplugs This is easily accomplished with a Stereo 3 5mm Male to 2x Mono 3 5mm Female Y Cable see Hosa part number YMM 261 There may be occasions when you want to connect consumer type devices with RCA unbalanced outputs This can easily be accomplished with a Stereo 3 5mm Male to 2x RCA Female Y Cable see Hosa part numbers YRA 167 and YRA 154 Get notified on User Manual and product updates Page 27 Subscribe at http www juicedlink com blog index htm XLR L XLR R Balanced Input Unless otherwise reconfigured by the PAN TO L or MONO switches XLR L is routed to the left output channel and XLR R is routed to the right output channel This is illustrated in the Block Diagram section Balanced sources such as XLR balanced microphones or line level signals from a balanced sound board c
23. ed by the Block Diagram to improve signal to noise performance The camera senses the presence of a strong signal in the right track and the camera s AGC function then throttles back its noisy gain Get notified on User Manual and product updates Page 37 Subscribe at http www juicedlink com blog index htm Even with the AGC Disable technique there are limitations in usability and performance The technique greatly improves signal to noise performance taking what was unusable audio and providing you with something that you can work with But it generally will not provide as high quality signal to noise performance compared to a camera which already has manual controls Additionally there is a good chance that you will have to abandon one of your recording tracks the camera s right channel where the AGC Disable signal is routed If you have not yet selected a camera we recommend that you consider one which already has manual control of its audio Tone The TONE setting injects a 20KHz tone into the right recording track of the camera This frequency is selected since it is beyond the audible range for most people and is an attempt to continue to use the camera s right track for recording This may work OK on some cameras and may not work at all on other cameras Continued use of the right recording track depends on the camera s Nyquist Anti Aliasing Low Pass Filter to be working extremely effectively Otherwise the
24. emonstrating the performance improvement of the AGC Disable technique Note the GH1 uses a 2 5mm minijack input instead of the standard 3 5mm minijack input which is the size of the plugs on the cable included with the DT454 So you will need to use an adapter to convert to 2 5mm Return to Contents Get notified on User Manual and product updates Page 11 Subscribe at http www juicedlink com blog index htm Nikon D300s D3s Different camera platforms with varying gain lineups and firmware implementations vary in terms of their required input signal level to optimize signal to noise while also having sufficient margin to headroom distortion The factory HI and LO meter settings try to balance the needs across platforms But the may not be optimal for every camera For these cameras you will use the factory LO meter setting It is always prefer below when a camera has full Manual control This way to achieve the best signal to noise performance while recording fine audio detail you throttle back the noisy amplifiers in the camera and replace that noisy gain with clean gain from the juicedLink low noise preamplifiers However your camera does have three settings for microphone sensitivity high med low You will use the low setting in your camera which throttles back the noisy camera gain as much as possible Because of this you will not use the DT454 AGC disable feature So you also get two tracks for recordin
25. ents Get notified on User Manual and product updates Page 35 Subscribe at http www juicedlink com blog index htm Camcorder Settings Consult the camera User Manual to learn what audio controls are provided It is preferred that cameras have manual override of their Automatic Gain Control AGC with control of the gain Some cameras do not have full control of the gain but provide a High and Low setting Others have no manual override of the AGC at all Low Noise Performance The general principle to improve your signal to noise performance is to throttle back the noisy camera amplifiers and replace that noisy gain with clean gain from the juicedLink low noise preamplifier This results in an improved signal to noise performance while recording fine audio detail such as dialogue Make sure you turn down all of the TRIM potentiometers on the DT454 which do not have a microphone connected to its input Preamps without the impedance of a microphone connected to their input have a high impedance at the preamp input which results in the preamp generating a lot of noise So turn down all of the TRIM potentiometers on the DT454 which do not have a microphone connected to its input If your camera does not have manual controls then see the AGC Disable section for more details Dynamic Range Performance When you are in an unpredictable signal level environment say a birthday party where kids could su
26. ere was no need to use any of the AGC disable features of the DT454 Return to Contents Get notified on User Manual and product updates Page 13 Subscribe at http www juicedlink com blog index htm Features Specifications e General Features o 4 microphone channels 2 XLR 2 unbalanced o Meters 4 segment LED each right left 2 sensitivity settings high low adjustable for calibration valuable for new 5D firmware where meters are not visible during recording o 2 AGC Disable choices Tone Safety mode broadband noise o 30dB low noise max gain single ended stereo This is even more available max gain than the CX family of preamps This is additional gain is very valuable with the new Canon 5D 2 0 4 firmware release as well as MagicLantern users Headphone amplifier Playback Monitor 48V phantom plus 12V phantom power saving mode Low noise preamp see THAT1512 datasheet for details on XLR preamp Power Single 9V Alkaline or Li polymer battery not included See Powering Section for more details o Mechanical Black Anodized Aluminum enclosure for EMI protection and rugged use Mounts to bottom of camera and top of tripod Case Dimensions 4 5 x 3 2 x 1 5 Weight 10 ounces no battery o Includes Stereo 3 5mm miniplug cable 1 8 Allen wrench key O OOO O Features and Specifications are subject to change without notice Return to Contents Page 14 Omissions Suggestions Contac
27. eter counterclockwise ii If you reach full counter clockwise and the meter calibration is not exactly there then leave the adjustment in the full counter clockwise position This is OK as it will just give you an extra couple of dB of headroom You can bump up the 5D gain if a bit if you wish to reach exact calibration 2 WHILE RECORDING a Set the 5D gain on the 1 click above off setting b Set the AGC Disable switch to the OFF position c Set PAN TO L NORM switch to the NORM position Since AGC Disable is not used d Set the METER switch to the HI position and adjust the GAIN and TRIM volume potentiometer settings to keep the peaks below the red LED of the Meter e The other settings phantom power etc operate like any typical mixer 3 POST PRODUCTION a There s no need to follow any of the post production steps presented in this Manual since there was no need to use any of the AGC disable features of the DT454 Up Return to Contents MagicLantern 3 Party Firmware MagicLantern is 3 party firmware that was written by a genius for the 5D platform It is not from Canon so you need to do your due diligence to understand the risks of what you are getting yourself into It has very useful tools and has a lot of users you can converse with the users on the typical video production message boards but as it is not from Canon it is not a solution for everybogy However MagicLantern provides for even more control th
28. g Unfortunately have a high analog noisy gain in the front end which limits the signal to noise performance of your system Recordings from these cameras do not have the signal to noise performance a can be achieved with are using juicedLink low noise preamplifiers with cameras that have Manual gain like the Canon 5D or even the signal to noise performance of a camera which does not have Manual gain but not the fixed hi analog noisy gain in the front end while using the DT454 AGC disable technique such as the Canon T2i etc The AGC disable techniques offered no further signal to noise performance improvement for these cameras Follow these steps 1 CALIBRATE THE DT454 METER a There s no requirement for calibrating the meter The factory setting for the LO meter sensitivity will be used 2 WHILE RECORDING a Set the camera microphone sensitivity to low b Set the DT454 METER switch to the LO switch position c Set the PAN TO L NORM switch to the NORM position since AGC disable is not being used Page 12 Omissions Suggestions Contact Us www juicedLink com d Set the AGC DISABLE switch to the OFF position e Adjust the GAIN and TRIM volume potentiometer settings to keep the peaks below the red LED of the meter f The other settings phantom power etc operate like any typical mixer 3 POST PRODUCTION a There s no need to follow any of the post production steps presented in this Manual since th
29. generating a lot of noise So turn down all of the TRIM potentiometers on the DT454 which do not have a microphone connected to its input If itis desirable to adjust the meter sensitivity there are adjustment potentiometers behind the holes in the bottom of the enclosure next to the HI and LO markings which provide a limited adjustment range Return to Contents Page 42 Omissions Suggestions Contact Us www juicedLink com Headphone Monitoring As illustrated by the Block Diagram the headphones output a mono signal combining both the right and left channels into each of the headphone earcups At high gain the small consumer grade headphone amp can produce a lot of noise Fortunately for most circumstances where the camera gain has been throttled back either manually or by the AGC Disable feature the signal level is relatively high so the headphone gain can be turned down where the headphone amp noise is relatively low Return to Contents Playback Headphone Monitoring As illustrated by the Block Diagram the headphones output a mono signal combining both the right and left channels into each of the headphone earcups To use the headphone amplifier for playback monitoring playing back the clip in your camera and using the DT454 to monitor the audio set the DT454 with the following configuration e TIP L RING R GAIN set to LO e Turn down the PHONES volume control all of the way e Use the TIP L RING R TRIM
30. inaudible 20KHz tone can produce aliased artifacts in the audio band You will need to run tests to validate the effectiveness of this approach with your equipment Evaluation of these tests must be done with the clip pulled into your computer or with playback monitoring since the headphone monitoring takes place before the recording device If the evaluation of recorded audio is not to your satisfaction then you will either abandon the right recording track while using the TONE or use the Safety Mode NOISE approach In either case if you are using right channel microphones XLR R or RING R then you will use the PAN TO L switch to route those mics to the clean recording channel left If you are going attempt to use the right recording track then you should test this out before each shot Some AGC algorithms which not only change their gain settings but also play around with filter roll off frequency settings This not only effects aliasing which can produce in band tone effects but also creates audible pops and clicks as the parameters get adjusted by the firmware Page 38 Omissions Suggestions Contact Us www juicedLink com We are risk averse when it comes to production audio If you are forced to use an AGC Disable technique because your camera does not have manual control then we are of the opinion that even if you choose to use the TONE approach you should abandon the camera s right track and only use the clean
31. left track for recording Then use the PAN TO L switch to route any right channel microphones XLR R or RING R to the clean left recording track See the Post Production Removing Right Track section for more details If you do attempt to use the right track then the 20KHz tone will also be recorded with your audio on the right track Even though this 20KHz tone is inaudible for most people you should take the exira step to remove this tone in post production Your final product may get resampled by a compression algorithm that you don t control YouTube etc and result in an aliased artifact of the tone back in the audio band See the Post Production Removing Tone for more details With either the TONE or NOISE approach you will use the METER in the HI setting The meter sensitivity has been pre calibrated for a typical camera If further calibration is desired then see the Meter section for more details as there may be exceptions Safety Mode Noise The NOISE setting injects a broadband uncorrelated noise signal into the right recording track of the camera This leaves the left track clean for recording nn IERI dn Right Track clean audio Left Track As such you will NOT be able to use the right track of the camera to record your microphones If you have any microphones plugged into the right input channels XLR R or RING R then you must use the PAN TO L switch to route those signals over t
32. ler XLR L XLR R TIP L RING R PHONES gt oN r ck Monitor Operation gus Nut PET PHONES down all the way PHONES Les vol control using TIPL RING R MONO OUT MIC LEVEL Use the 1 8 Hex Key included Insert the Hex Key into the bottom of the 44 20 mounting screw and rotate the mounting screw into the 14 20 threads in the base of the camera The Hex Key provides leverage so the 14 20 mounting screw can be secured tightly Return to Contents Get notified on User Manual and product updates Page 23 Subscribe at http www juicedlink com blog index html Mounting to Tripod INPUT TIP RING Q XLR L XLR R 2 z Mic H Line gt Mono Stereo Pan to L Norm I O 1 ON OFF O Meter Hi for AGC DIS or camera gain can be throttied back s i H JOWUOWy xoeq ejd 10 O1 XLR R INPUT u re 9 T N O Meter HI for AGC DIS or if camera galaan be throttled back The bottom of the DT454 has 4 20 threads for mounting to the top of a tripod or other device 1 Noise E 2 3 a oO Q lt du jojuow xoeq ejd 10 Indul SIN JO ONIY diL Approx size of Manfrotto quick release mounting plate 20 Threads Typically users will mount their equipment to a quick release plate first The switch locations of the DT454 were designed such that the most frequently used switches Gain Phantom Power and Panning are most readi
33. ly available to the user The illustration shows what portion of the DT454 base is occupied by a typical quick release mounting plate Manfrotto 357 The plate limits access only to items rarely used Sometimes these are only used once at setup with your equipment Return to Contents Page 24 Omissions Suggestions Contact Us www juicedLink com Output Connection to Camera To camera 3 5mm minijack mic input DT454 XLR Adapter Preamp AGC Disabler XLR L XLR R TIP L RING R PHONES ae f 1 oP M Playback Monitor Operation OW OUT turn PHONES down all the way PHONES pd MIC LEVEL vol control using TIP L RING R MONO Use the included 3 5mm stereo miniplug cable and plug one end into the DT454 OUT jack Then plug the other end into the camera s 3 5mm minijack microphone input Note some cameras may use 2 5mm plugs instead of 3 5mm plugs Inexpensive adapters are available to make the required connection Return to Contents Get notified on User Manual and product updates Page 25 Subscribe at http www juicedlink com blog index html Powering Place a fresh 9V alkaline battery into the DT454 battery tray using the correct orientation Flip the PWR switch to ON The PWR indicator LED will illuminate When the battery starts to get so low that you should change it then the LOW BATT indicator LED will illuminate This indicator is calibrated for alkaline type batteries Note it is
34. o the left output channel Although you sacrifice one recording channel the NOISE approach is a much more stable and repeatable technique for AGC DISABLE Get notified on User Manual and product updates Page 39 Subscribe at http www juicedlink com blog index htm However another valid approach would be to use the TONE and abandon the right track just the same You may want to test out each approach to see what works best with your system In post you will need to delete the right track of audio containing the disable signal See the Post Production Removing Right Track for more details Special note regarding Canon Cameras 1 The microphone input on the camera does not get activated until the camera begins to RECORD for the first time 2 Until you hit RECORD and activate the microphone input you will hear noise in the DT454 headphones Once you hit RECORD the noise in the headphones goes away and doesn t return until the camera power gets cycled 3 After the camera power gets cycled you will need to hit RECORD again to eliminate the noise in the headphones With either the TONE or NOISE approach you will use the METER in the HI setting The meter sensitivity has been pre calibrated for a typical camera If further calibration is desired then see the Meter section for more details as there may be exceptions Return to Contents Page 40 Omissions Suggestions Contact Us www juicedLink com
35. one which is not a very important parameter for general use e Check out more information about battery life in the Powering section Return to Contents Page 30 Omissions Suggestions Contact Us www juicedLink com MIC LINE Switches INPUT TIP RING Pan to L Norm p O o m U iV lt 4 i x O m d 10 yndu 91 10 ONIY diL The LINE position inserts a 40dB attenuator before the preamps in the XLR L and XLR R signal chains For typical microphone use the MIC position is selected Return to Contents Get notified on User Manual and product updates Page 31 Subscribe at http www juicedlink com blog index htm MONO STEREO Switch INPUT TIP RING Mic eine SU 0e HI mi to L Norm O o a iV lt o i x O o m d 10 ndul SW 10 ONIY diL As illustrated by the Block Diagram the STERO switch position keeps the right and left signal channels independent from each other and presents them to the corresponding right and left output connections of the OUT minijack The MONO switch position combines the right and left signals and presents the combination to both the right and left output connections of the OUT minijack This can save a small step in post production when using a single mono mic Note the MONO switch position will result in a loss of some gain because of the loading effect The DT454 has sufficient maxim
36. ou can run the DT454 meter a little hot Or you can try and get the DT454 calibration a little bit closer to the 5D 1 click setting NOTE We have posted a video on our website which may be helpful to illustrate steps in general However please refer to this user Manual for the exact details 1 CALIBRATE THE DT454 METER a Set the 5D gain on the 1 click above off setting b Set the AGC Disable switch to the OFF position c Set PAN TOL NORM switch to the NORM position Since AGC Disable is not used d Set the METER switch to the HI position e Connect a mic to your DT454 and adjust the GAIN and TRIM volume potentiometer settings so that when you speak into your microphone the meter on the 5D peaks splash up to the 12dB full scale point f Just above the HI lettering on the bottom of the DT454 locate small hole in the aluminum enclosure Behind this hole is a potentiometer that calibrates the meter sensitivity for the HI setting g Using a small screwdriver 1 16 adjust the HI METER potentiometer so the 3 LED is illuminated as the 5D meter splashes up to the 12dB full scale point while you speak into your microphone The meter has Get notified on User Manual and product updates Page 5 Subscribe at http www juicedlink com blog index htm a limited calibration range but you should be able to get the correlation fairly close i From the factory setting you will typically be adjusting the potentiom
37. sUn CdLink User s Manual DT454 XLR Adapter Preamplifier AGC Disabler Canon OT std X R Adag Pom AGC E mon 2010 juicedLink LLC ENGLISH All Rights Reserved DT454 User Manual Rev1 10 Click on heading to jump to page Contents ise sane ste nanaseceenuensesaauscausacusacessasacusdsuuasussdesedusiedussuaadecesdsuadeaun 2 Read This FirSt uias nixa icicu Ri sai i ow E Kn uj EDAM 4 Warnings General Leere aene ununi unu naar naar nar aua Ra raura Rua an 4 Notes Regarding Specific Cameras eene eoe n aenean nna un an 5 Canon 5D Mark ll LLL er rr err erreur nne na unn un aan anRuau au aur aun aR 5 Firmware Release 2 0 4 and Later 2 eene enne nn 5 MagicLantern 3 Party Firmware eere erre rennen nnn 6 Canon T2i 7D 1D Mark IV Lc eere erreur nnn nnn nua unu nuu nuu nnan 8 Panasonic Lumix GH1 creer rere r enne nau u an una nara un annua ana 10 Nikon D300s D3s mmmmmmmmmmnnmnnnannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 12 General nina Ei ca ER B MED RR RD DR DDR EN 14 Features Specifications correr erroe nennen anneau una nnu nana 14 Switch Panel Descriptions and Photos 15 POE OS ii i REERARRRERIENAME CAM EaSEREKNE ent 15 Front Panel Switches
38. t Us www juicedLink com Switch Panel Descriptions and Photos Photos DT454 XLR Adapter Preamp AGC Disabler TIP L RING R PHONES ei Da ot dea o back Monitor Operation eg PHONES down all the way picem vol control using TIP L RING R MONO Get notified on User Manual and product updates Page 15 Subscribe at http www juicedlink com blog index html Page 16 INPUT C3 TIP RING j XLR R Mic p p HI e Line 7 Lo A n WU Mono Stereo HO iw gw 3p Pan toL Norm Meter Hi for AGC DIS or if camera gain can be throttled back PRE X CE www juicedLink com Made in USA E 3 F4 6 g 5 E g i g 5 E Return to Contents Omissions Suggestions Contact Us www juicedLink com Front Panel Switches DT454 XLR Adapter Preamp AGC Disabler XLR L XLR R TIP L RING R PHONES FT A AUN a TS j Playback Monitor Operation turn PHONES down all the way PHONES LOW OUT BATT MIC LEVEL vol control using TIP L RING R MONO 1 ON OFF switch PWR indicator LED LOW BATT low battery indicator LED 2 TRIM controls for XLR L and XLR R microphone or line input channels 3 TRIM controls for TIP L and RING R microphone or playback monitor input channels 4 Left L and Right R channel signal level meters 5 Output OUT at an amplified mic level which connects to the microphone input of your camera through a stereo
39. the only track with the Auto Toggle icon activated it will paste into this track v You may need to select the right edge of the pasted audio track and expand stretch the track to fill the rest of the timeline 4 Final Cut Express Alternate Insructions a Delete the right track i Drag clip into timeline and select it with your mouse Page 46 Omissions Suggestions Contact Us www juicedLink com ii MODIFY gt LINK to unlink the audio from the video iii MODIFY gt STEREO PAIR to unline the right and left audio tracks iv Use mouse to select and delete the right track b Pan the left track to center i Select double click the remaining left A1 track ii Pan should currently read 1 iii Click the slider and move it towards the center so it reads 0 v Enjoy your clean audio Return to Contents Get notified on User Manual and product updates Page 47 Subscribe at http www juicedlink com blog index htm Subscribe to the juicedLink Blog Get notified on new revisions of this User Manual product updates new product releases and tutorial videos Subscribe to the blog www juicedlink com blog index html Return to Contents Care and Maintenance There is no specific maintenance regimen recommended Return to Contents Warranty Service and Returns The design of the juicedLink family of ultra portable mixers is uncompromising in quality and performance and utilizes top grade profession
40. the post production steps presented in this Manual since there was no need to use any of the AGC disable features of the DT454 Return to Contents Get notified on User Manual and product updates Page 7 Subscribe at http www juicedlink com blog index htm Canon T2i 7D 1D Mark IV Different camera platforms with varying gain lineups and firmware implementations vary in terms of their required input signal level to optimize signal to noise while also having sufficient margin to headroom distortion The factory HI and LO meter settings try to balance the needs across platforms But the may not be optimal for every camera This section will describe some simple steps to get the DT454 meter more precisely calibrated to the gain needs of your camera while using the AGC Disable feature of the DT 454 We will use the known output signal level of the AGC Disable s noise signal for calibration So we will take the output of the DT454 with the noise signal and feed that back to the DT454 input Then you will adjust a potentiometer to a pre determined position and signal level Then you will use a small screwdriver to adjust one of the meter potentiometers so the meter is calibrated to that signal level Follow these steps NOTE We have posted a video on our website which may be helpful to illustrate steps in general However please refer to this user Manual for the exact details a CALIBRATE THE DT454 METER a
41. uction Removing Tone Even though this 20KHz tone is inaudible for most people you should take the extra step to remove this tone in post production Your final product may get resampled by a compression algorithm that you don t control YouTube etc and result in an aliased artifact of the tone back in the audio band 1 Audacity a This technique utilizes the Nyquist plug in for Audacity called Notch i Download and install the plug in here http audacity sourceforge net download nyquistplugins ii You will need to restart Audacity after the plug in is placed in the proper directory b Measure the exact tone frequency in your clip i Use your mouse to select the waveform in the right track li ANALYZE gt PLOT SPECTRUM will bring up a frequency analysis window of your waveform iii Change the number of samples from 512 to 2048 iv Move the cursor over the 20KHz tone and note the frequency c Use Notch to knock down the tone amplitude i Use your mouse to select the waveform in the right track li EFFECT gt NOTCH FILTER brings up the Notch program iii Change the Default Choice to 2 This allows you to enter your own custom notch frequency iv Change the notch frequency to the frequency you noted from the plot of the frequency spectrum above v Set the notch Q to 1 vi Click OK d See that the tone amplitude has been knocked down i Use your mouse to select the waveform in the right track li ANALYZE gt PLOT SPECTRUM
42. um gain to make up for this loss in most circumstances Return to Contents Page 32 Omissions Suggestions Contact Us www juicedLink com PAN TOL NORM INPUT TIP RING XLR L XLR R E 1 Mic li M y zu Mono Stereo LCI Pan to L Norm JOYUOW YORGAL q 10 O1 d 10 ndul IN 10 ONIY dIL As illustrated by the Block Diagram the PAN TO L switch position routes the right channel over to the left channel So PAN TO L is used to route XLR R and RING R to the left channel for recording This is utilized when you are using right channel mics XLR R or RING R and plan on abandoning the track containing the TONE or NOISE AGC Disable signal track right Note when using the NOISE AGC Disable signal you must abandon the right recording track See more details in the AGC Disable section Return to Contents Get notified on User Manual and product updates Page 33 Subscribe at http www juicedlink com blog index htm GAIN Settings TIP RING med O e V D lt o QD E O A q e Q 10 jndu IW 10 ONIY dl L The Block Diagram illustrates where the low noise preamplifiers are located in the system Note that the two low noise preamps for the TIP L and RING R inputs have their gain settings controlled by one switch so both will either be HI or LO When setting up the user will typically start with the GAIN in the HI position If you find that the correct
43. your ears in any of the following circumstances While plugging the headphones into the headphone driving device While plugging the mixer into the headphone driving device While turning on or off the mixer While turning on or off the phantom power While plugging a device into the input of the mixer This device its enclosure and the connections to cable shields that plug into this device are conductive Avoid electrocution and observe caution with cable runs near areas where high voltages and or currents may exist Page 4 Omissions Suggestions Contact Us www juicedLink com Canon 5D Mark Il Firmware Release 2 0 4 and Later With firmware release 2 0 4 Canon has provided manual control for audio It also provides for a meter But the meter is only visible during setup not during recording This is a welcome addition We hope to see firmware updates from all DSLR manufacturers for all cameras to add audio features For lowest noise performance while recording fine audio detail you will want to manually throttle back the camera gain and replace that noisy gain with clean gain from the juicedLink low noise preamplifier Follow the directions from Canon for how to navigate the firmware menus The lowest noise performance will be achieved with the lowest gain setting on the 5D 1 click above the lowest off setting This may be just a little outside the factory calibration for the DT454 METER HI setting Y
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