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Convergent Design 

14 January 2020 

Erika User Manual 

How to Wear the Erika Mic 

When wearing Erika, we suggest keeping the microphone in a vertical orientation with the mic port facing 
forward and the USB port pointing down, as this helps prevent rain from entering the USB port.  
 
Erika is typically worn in the center of the chest, over the sternum 4 to 5 inches down from the wearer's chin. 
Other positions can work well also. If you have an implanted medical device, observe all recommendations 
concerning these devices. For example, since the Erika Mic has an embedded magnet and a backing magnet, 
keep the magnets at least 6 inches from your implanted devices.   
 
You may also use Erika as a conference room mic; just set it face-up on the table. 

After using Erika, you may set the Erika Mic face-down. Or you may disconnect the Erika Receiver from the 
USB port. Either way, the Erika Mic will power off. When appropriate, you may use the supplied cable to 
recharge Erika. 

You may hide Erika behind a lapel, in a pocket, under clothing, or covered with a piece of matching fabric, 
with minimal effect on audio quality. 

How do I charge the Erika Microphone? 

You may use a computer USB port, or an AC Powered USB power supply/charger. Most USB power 
banks/batteries will not charge the Erika Mic, as Erika requires so little power that the power bank/battery 
will turn off the USB port. Note that attaching an Erika to a laptop, then closing the laptop will STOP the 
charging. The Blue LED will flash while charging, and a solid Blue LED indicates a full charge. While charging, 
the Erika microphone is muted. 

Erika Transmission information 

Erika uses 2.4 GHz radio spectrum to communicate between transmitter and Receiver. Erika utilizes random 
frequency hopping. This technique improves security and helps Erika to coexist with other 2.4 GHz devices. If 
interference does occur, Erika then avoids using frequencies with interference. 

 

AutoMute 

 

AutoMute is an Erika feature designed to help reduce “Hot Mic” moments. The goal is to help prevent private 
conversations and embarrassing moments from becoming public. Our AutoMute feature is not a guarantee 
that “Hot Mic” moments will never occur, as it requires some action on your part to set up correctly. 
 
AutoMute is a benefit of Erika’s multiple radio power levels. With Erika, you may select an appropriate power 
level for your needs. The power levels are numbered 1 to 5, with 1 being the lowest power level, thus the 
shortest range. 5 is the highest power level, for the longest range, approximately 300 feet or 91 meters. 
 
We recommend using the lowest power level that suits your needs. For example, many videos are created 
with a camera close to the subject. Thus, the distance is relatively short. In this case, the power level of 1 may 
be very appropriate. In other cases, Level 2 or 3 may be best. Levels 4

 and 5 are the highest power 

levels 

and use more battery power. 

Summary of Contents for Erika

Page 1: ...Erika Microphone System User Manual Convergent Design 4525 Northpark Drive Colorado Springs Colorado 80918 www convergent design com 720 221 3861 ...

Page 2: ...4 How do I charge the Erika Microphone 4 Erika Transmission information 4 Music and Speech Modes 5 WiFi 7 Receiver Positioning 7 LED Indicators 8 Technical Specifications 9 Warranty Information 10 Customer Support 11 Regulatory Information 11 Online Resources 12 How do I survey my location for 2 4GHz WiFi to check for heavily used channels 12 Safety 13 ...

Page 3: ...at the Mic needs to be paired with the Receiver Our factory pairs the Mic and Receiver before shipping 4 You may now attach Erika using one of the supplied magnets 5 In most situations your Windows 10 computer will recognize your Erika Mic and your software such as Zoom Microsoft Teams and Google Meet will immediately use your new Erika Mic 6 Erika should be ready for you so you may now speak natu...

Page 4: ...owered down and as it is charging the Blue LED will flash When fully charged the Blue LED will be on solid Note that the Erika Mic cannot be over charged or over discharged Thus you can leave the Erika Mic on a USB power source such as a computer or AC powered USB Power Supply Most USB battery banks will not charge Erika as they will shut off prematurely To use Erika Mic first plug the white Erika...

Page 5: ...will turn off the USB port Note that attaching an Erika to a laptop then closing the laptop will STOP the charging The Blue LED will flash while charging and a solid Blue LED indicates a full charge While charging the Erika microphone is muted Erika Transmission information Erika uses 2 4 GHz radio spectrum to communicate between transmitter and Receiver Erika utilizes random frequency hopping Thi...

Page 6: ...ses it is best to set your power level to the lowest acceptable level so that the two Erika systems do not interfere with each other Of course Erika is designed to avoid interference but it helps when the minimum acceptable power levels are used Firmware Updates Erika contains firmware which is fully upgradeable in the field This function enables us to add features over time and to fix problems th...

Page 7: ...u desire Using a different firmware version for Speech and Music we eliminate the possibility of activating Music Mode accidentally Using Erika with Various Programs With Windows 10 most programs such as Zoom Google Meet and Microsoft Teams will immediately recognize and use Erika as your audio source Specific advanced audio programs require you to select the Erika Mic as your audio source manuall...

Page 8: ...hat the Erika Receiver is not located close to a WiFi Router or Extender 3 Set your 2 4 GHz WiFi Bandwidth to 20 MHz versus 40 MHz 4 If you have multiple WIFI routers access points you need to assign them to the same WIFI channel Otherwise the RF spectrum may be consumed with WiFi traffic Receiver Positioning A clear line of sight path from the Erika Mic to the Erika Receiver is ideal However this...

Page 9: ...ver Red Solid Red The paired Erika Mic is powered off muted or out of range of the Receiver In unusual cases it may be that the Erika Mic is not paired with your Erika Receiver No audio is being sent to the Receiver Receiver Yellow Slow Flashing Yellow The Receiver starts flashing Yellow slowly when less than approximately two hours of Mic battery runtime remains As conditions permit maybe during ...

Page 10: ...Power Levels 4 and 5 16 Hours Speech Mode Music Mode is less Power Levels 1 2 and 3 are for short to normal range and 4 and 5 are for long range operation Battery Standby Time Mic Powered Off 60 Days Speech or Music Mode Max Distance between Mic and Receiver Values are for a clear line of sight from Mic to Receiver Outdoors Approximately 300 feet 91 meters in Speech Mode Approximately 70 feet 21 M...

Page 11: ...sed in the repair process may be recycled or repaired at Convergent Design s sole discretion Convergent Design will perform this warranty service at no charge to the registered owner provided the product is shipped prepaid to Convergent Design Convergent Design reserves the right to determine whether a needed repair is subject to the warranty as per its provisions stated herein Transit damage caus...

Page 12: ...omply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications Howe...

Page 13: ... the other signals will cause interference with Erika Erika will automatically block out channels with heavy interference It is preferred to have as many channels available for Erika Another option to provide more channels for Erika is to move your local WiFi network up to the 5GHz band turning off the 2 4GHz transmission The Net Spot application does operate on the 5GHz channels as well so you ca...

Page 14: ...sert anything into the Erika Mic port which is the opening on the front of the Erika Mic Do not immerse Erika in any liquid or allow any liquid to enter the Erika case Do not make unauthorized alterations to Erika or open the case Do not expose Erika to excessive heat Examples are extended periods in direct sunlight hot vehicles or other heat Please dispose of it correctly following local regulati...

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