ci8m manual graphic
Contents
1. at 1 kHz 10 dBV limiting 38 at 1 KHz Sample rate of CobraNet output 48 kHz Bit width 20 or 24 bit selectable Latency in CobraNet 1 33 2 66 or 5 33 ms selectable Impulse noise switching 0 to 40 Less than 65 dBV gain on trim Less than 99 dBV Emissions for RFI Complies with EN 55022 Unit Weight Internal Mains fuse All specifications subject to change without notice WARRANTY This product is guaranteed to be free from defects in materials and workmanship to the original purchaser for a period of 5 years from the date of purchase Should service be required return the unit postage prepaid along with the original sales receipt to Whirlwind Attention Repair 99 Ling Road Rochester New York 14612 The warranty on this product shall not apply to defects or damage resulting from abuse abnormal use or from repairs or modifications performed by anyone other than Whirlwind If itis determined a manufacturing defect has occurred Whirlwind will repair or replace the unit at our option and pay the postage back to you 99 Ling Road Rochester NY 14612 800 733 9473 585 663 8820 Fax 585 865 8930 Website http Awww whirlwindusa com Email sales whirlwindusa com I 6 I S Ea EAV A GAIN O TRIM GAIN O TRIM GAIN O TRIM GAIN O TRIM GAIN O TRIM GAIN O TRIM GAIN O TRIM GAIN O TRIM COBRANET C A gs q 1202. dBfs and the red at the clipping point of the analog to digital converter Trim controls provide fine adjustment for the level of the analog input signal being applied to the analog to digital converters A range of 35 dB of gain or attenuation allows optimization of the analog signal to minimize noise at the converters Adjust the signal so that peaks do not light the red 0 dBfs LED In general compressed audio signals can be setto 12 dB of headroom and open microphones should be set with 24 dB of headroom When using the limiter the 0 headroom LED will not light CobraNet LINK ACT and FAULT LEDs indicate the status of the CobraNet network connection LINK LED illuminates only when the Ethernet cable is connected to a network with other CobraNet devices ACT activity LED is on only when there is a match between the bitwidth latency and bundle settings of the CI8M and those of the receiving device FAULT LED is used to blink a numeric code to the user with a series of blinks followed by apause The number of blinks indicate the following Mismatched format or bundle settings Not used on CI8M Invalid bundle number selected greater than bundle 65279 or multicast unicast boundary straddled bundles 255 256 Ethernet cable disconnected or no other CobraNet devices on network CobraNet cannot communicate with DSP in the CI8M This code blinks once on power up and whenever an encoder setting change is detected to warn the user that persisten
3. 20O 20 20 20O 420 412C 120 OS y JO O 3020 O JO O anuo O P20 O 0 O anuo IPO O e neoe O ses e o digital 40 36 _ 40 36 _ 40 O 40 O 40 O 40 36 _ 40 36C 40 3O O O O O es 4 7 LIMITER SJ C d j 1 2 3 5 6 8 10 5 oO O 5 O a O a O00 0 0 BEMER 0000000000 0 o UU oO 6 n auvio FN C OoOo o Ce 125 ao O 0 O D oe AN O CE o 5 52 28 COBRANET BUNDLE SELECT BER oo EE N Py KP KY KTN KT CAUTION T0 PREVENT ELECTRIC SHOCK DO NOT o o a le a o al e a o A o 5 SEEN RESETS O 5 86 aT amp CD CS CD CD anil aa MADE IN USA BY WHIRLWIND LIFT CO c o Oa www whirlwindusa com RoHS PIN 2 TIP MIC OR LINE ANALOG INPUTS es J ATTENTION DEBRANCHER AVANT DOUVAIR 100 250 VAG 50 60 HZ 40 WATTS MA Controls and Connections Input gain switches apply fixed amounts of amplification to the microphone preamplifiers The top position applies 20 dB of analog gain appropriate for most microphones the center position is unity gain and is the normal setting for line input signals The bottom position adds 40 dB of gain for use with microphones with low output levels Four position LED headroom meters provide a quick and accurate visual indication of audio level relative to clipping The signal is monitored at the inputs of the analog to digital converters after the input level controls The bottom green LED illuminates at 36 dBfs the second green LED lights at 24 dBfs the yellow at 12
4. EP ES T EAEE GJ ES CISINI 8 ch Microphone Preamp lVlodule The CI8M is Whirlwind s premium standalone 8 channel CobraNet microphone preamp module Use this sonically superior preamp to convert microphone or line level analog audio to professional quality digital audio for distribution over CobraNet digital networks The inputs utilize one of the finest Analog Devices preamps the AD2019 With star grounding and distributed power the specifications of this design speak for themselves EIN of 129 dBV channel separation of 115 dB and THD of 004 The CI8M can be temporarily or permanently connected to a CobraNet network anywhere network access and AC power are available Connect any analog audio source balanced or unbalanced through the XLR or 1 4 TRS input jacks and instantly send them throughout the CobraNet digital audio network The CI8M requires no computer for operation Level controls and metering are conveniently located on the front panel along with peak limiter and phantom power switching Setup and operation are simple and easy Just set the rear panel Bundle Select encoder wheels to the desired transmit bundle number and set the Bitwidth Latency selector to match the bitwidth and latency of the receiving device Then apply the eight channels of audio and adjust the input level with the gain switches and rotary level controls as necessary ensuring that the level is below the 0 dBfs clipping level on the 4 segment LED m
5. a available at www cirrus com cobranetsoftware Some of the parameters that can be controlled on the CI8M include bundle numbers number of channels in the bundles digital word length latency and persistence These parameters are unlike the selections made with the encoders Bundle numbers and bitwidth latency selections made with the switches are hard coded and remembered when the power to the CI8M is cycled Settings made through Disco are volatile and forgotten on a power cycle unless persistence is turned on and Bundle Select Switches are set to 00000 There are also four transmitters available through Disco instead of just the one through the encoders Disco will temporarily override encoder settings other than 00000 on a CI8M These settings will not be remembered on power cycling regardless of the persistence setting in Disco
6. ce is enabled through CobraNet Discovery v3 4 5 v4 0 1 for Vista and that changing the encoders from 00000 will defeat Disco control at the next power cycle Persistence enabled means that the unit will remember its last settings through power cycling apo The Limiter switch turns the peak limiters on or off There are individual peak limiters on each audio channel which prevent the analog audio from clipping the A D converters The limiter has a fixed threshold of 10 dBfs with a 4 to 1 slope between 8 to 0 dBfs Attack and release times are fixed With the limiters on the 0 dBfs headroom LED will not light as the signal level is limited to 5 dB below this threshold Agreen LED illuminates when the limiters are active The Phantom Power switch turns on 48 VDC power to the microphone inputs Phantom power is only applied to the female XLR inputs not to the 1 4 TRS inputs A red LED illuminates when the phantom power is on The Power LED illuminates when AC power is applied to the unit and the unit is operating The 3 stage fan provides cooling to the internal components of the CI8M There is a foam filter on the front which should be cleaned periodically to maintain good airflow The front plastic fan guard snaps out to expose the filter 10 Ti 12 13 14 5 MODEL CI8M Inputs 1 through 8 are combination female XLR and 14 TRS jacks which accept balanced or unbalanced analog audio Either connection can be used fo
7. dividual CobraNet devices must have the same bitwidth and latency to communicate with each other properly The transmit setting must be acceptable to the device set to receive that bundle Many receive devices have an autodetect feature that will match the bitwidth and latency to that of the transmitter The CI8M uses an 8 position selector for choosing 20 or 24 bit word length and 5 33 ms 2 66 ms or 1 33 ms latencies In 24 bit word length and 5 33 ms latency a special case exists there are a maximum of 7 audio channels that can be packaged into a single bundle at this setting Whirlwind uses pairs of bundles where seven audio channels are contained in one bundle and one audio channel in the next higher bundle Channel 8 is automatically pushed up into the channel 1 slot of the next higher bundle number The CobraNet jack connects the CI8M to the Ethernet switch carrying the CobraNet network A green LED indicates network link anda yellow LED indicates data activity These are duplicated by two green LEDs on the front panel along with ared FAULT LED indicator The Power inlet is a standard IEC connection The power supply is internationally universal with a voltage range of 80 to 265 VAC at 50 or 60 Hz CobraNet Parameter Control through Discovery v3 4 5 v4 0 1 for Vista Setting all the Bundle Select Switches to 00000 allows remote setting of CobraNet parameters through the network with CobraNet Discovery software v3 4 5 version 4 0 1 for Vist
8. eters FEATURES e Uses CobraNet networking protocol compatible with all other CobraNet devices from over 40 manufacturers e Transmits 20 or 24 bit word length e Transmits 5 33 ms 2 66 ms or 1 33 ms latencies e Multiple transmitters may be accessed through CobraNet Discovery e Premium quality microphone preamplifiers provide up to 70 dB of gain or 30 dB of attenuation to accommodate any analog input signal with extremely low noise and low distortion e 48 Volt phantom power supplied to the XLR inputs and blocked from the 14 TRS input jacks e Peak limiters on each channel protect the digital converters from overload distortion e All audio controls and LED analog signal level meters are conveniently located on the front panel e No computer is required to operate the CI8M e Integrated universal power supply for 100 250 VAC 50 60 Hz operation e The CI8M is 1 RU high and mounts in standard 19 racks Specifications for Whirlwind CI8M Line input at 0 dBV gain 1 dBV 20 20 kHz Mic input at 40 dBV gain 25 dBV 20 20 kHz Line input Less than 0047 20 to 20 kHz Mic input Less than 0071 20 to 20 kHz Range of level pot 70 dBV Common Mode Rejection of Input 85 dBV at 60 Hz eee All measurements in dBV Gain setting Gain setting 40 Maximum Input level 20 102 102 98 77 48 Volts DC Capable of supplying 15 mA per channel THD in limiting 6 dBV limiting 18
9. r mic or line level inputs Phantom power is present only on the XLR connector For unbalanced inputs connect pin 3 to pin 1 in the input XLR plug or just use a tip sleeve plug in the 1 jack The AUDIO SHIELD TO EARTH switch breaks the connection from AC Earth to the audio common to reduce hum when necessary CobraNet Bundle Select switches are used to select the bundle number to be transmitted by the CI8M All 65 279 CobraNet bundles are directly accessible from the encoders Bundles 1 255 are Multicast bundles and 256 65 279 are Unicast The leftmost encoder also has 3 special functions With the encoder in the 70000 position the front three status LEDs LINK ACT FAULT will flash a code for the software version in the CI8M The LEDs will blink the number of the software version with a long pause between the series of blinks e g four flashes followed by a long pause equals version four Should the CI8M ever need to be rebooted the 80000 position of the encoder will cycle a reset of the unit every two seconds Unplugging and reconnecting the power cord will also reset the CI8M The 90000 position of the encoder is a self test for all the LEDs except the power LED Setting the switches to 00000 allows remote setting of bundle parameters through the network with CobraNet Discovery software v3 4 5 v4 0 1 for Vista Bitwidth Latency Selector matches the audio bitwidth and latency transmitted by the CI8M to that of the receiving CobraNet device In
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