MicroField User Manual
Contents Introduction ........................................................................................................................................ 1 MicroField Key Features............................................................................................................... 3 Important Notes About Your MicroField .................................................................................... 4 MicroField Channels......................................................................
Applications: 1. Using MicroField for Rebroadcasting .................................................................................. 19 Setting Up The Transmit Channel ....................................................................................... 19 Important Notes ............................................................................................................... 20 Transmitting to a Phonak MicroLink or MicroEar Receiver ..........................................
3. MicroField as a Transmitter ................................................................................................. 38 Using the Auxiliary Input With a Microphone .................................................................. 39 Using the Auxiliary Input With Your TV or Other Device ................................................. 40 Troubleshooting ................................................................................................................................
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Introduction 1
Introduction Welcome to the Phonak World of Wireless Communication! Thank you for choosing MicroField! MicroField is a high-quality product from Phonak, a world leader in hearing technology innovation and reliability. MicroField automatically finds audio transmissions (such as from a teacher’s wireless transmitter, a theater sound system, or other facilities providing wireless assistive listening) on any of three frequency bands.
MicroField Key Features Receives audio on three frequency bands 72-76MHz 216-217MHz Multiple Infrared (IR) Channels Can be used at literally thousands of facilities! Classrooms, theaters, cinema, places of worship, courtrooms, etc.
Important Notes About Your MicroField MicroField is a highly versatile product. It can receive various types of audio signals and uses a variety of methods to convert the signals to a form you can use. The unit can retransmit the signals directly to an FM or external receiver; it can send audio to a headset or an optional loudspeaker; or it can send audio signals via auxiliary connections to an external transmitter that transmits to an FM receiver.
Important Notes About Your MicroField Cont. When shipped, your MicroField is set to send audio to the headset jack. If you are planning to use it with a MicroEar, MicroLink or other FM receiver, it must be set up for the way you will be using it. See page 20 for more information. Make certain that the batteries are charged overnight before using MicroField. See page 15.
Important Notes About Your MicroField Cont. MicroField Channels There are many places you can use your MicroField. These places include places of worship, schools, cinemas, live theatres, stadiums, courtrooms and government meeting rooms. Many public facilities provide transmitters that use specific channels to send the audio from their sound systems to personal receivers or portable listening devices.
Instructions For First-Time Users Unpack your new Phonak MicroField and make sure all components were included in the shipment: 1. MicroField module (with 4 AA NiMH rechargable batteries pre-installed) 2. Nylon case 3. Infrared receiving cable 4. Power supply for re-charging and/or powering the unit 5. Headset (not shown) 2 4 1 3 If any components are missing, contact Phonak immediately. If any items were damaged in shipping, retain the packing materials for inspection and contact the shipper.
General Functions 8
General Functions Turning the Unit On and Off To turn on your MicroField, press and hold the ON button until you see the Phonak logo on the display, and then release. To turn the unit off, press and hold the OFF button until the display turns off. If the I/O symbol is illuminated, your MicroField’s auto-shutoff feature has been activated. See page 13 for more information.
General Functions Operational Overview - Connections and Controls Use for controlling volume and selecting channels Use to select and store presets or to program the unit Connect the provided power supply here to charge the batteries or operate the unit Press and hold until display turns on (or off) An infrared receiving cable (supplied) connects here Connect a headset, neckloop, an optional speaker, or a cable to your 72MHz transmitter here 10 Display indicates channel, battery status, program mode,
General Functions MicroField’s Display Indicates signal strength of received audio channel When illuminated, indicates unit is in search mode Indicates either the preset number, channel number, or relative volume setting The battery symbol indicates approximate battery life remaining; when flashing, shutdown is imminent When illuminated, indicates unit is in transmit channel programming mode When illuminated, indicates presets are locked and new ones cannot be stored When illuminated, indicates unit
General Functions Adjusting Volume To increase or decrease the volume, press the UP or DOWN keys. MicroField’s display will show a number between 0 and 25 indicating the relative volume level. The unit will also remember volume settings for each preset. Once you adjust volume to the desired level, the volume level will automatically return the next time you select that preset. If CH appears in your MicroField’s display, your unit is in the search mode.
General Functions Enabling the Automatic Shut-Off Function Your MicroField can be set up so that after 30 minutes of no receive signal, it will turn itself off. To activate this feature, quickly* press and hold the On/Off button and then the UP button. The I/O symbol will be displayed. To turn off the automatic shut-off function, quickly* press and hold the On/Off button and then press the DOWN button. The I/O symbol will be extinguished.
General Functions Returning to Factory Defaults This feature restores the factory defaults to your MicroField. This is recommended if someone new is going to use the unit or if you simply want to start over. When you restore the factory default settings, the following occurs: All of the presets are programmed to channel 00 (they are all cleared). The transmitting channel is set to channel 00. The auto shut-off function is turned off. The preset lock function is turned off.
General Functions Charging the Batteries To charge your MicroField’s batteries, connect the power supply to MicroField and then plug it into a wall outlet. You will notice that the battery symbol flashes while it is charging. It will take 13 hours to fully charge the batteries. When the batteries are fully charged, the unit will stop charging.
General Functions Using the Power Supply Your MicroField unit may be operated with batteries or connected to the power supply. To use your unit with the power supply, simply connect the supply to the front of the MicroField unit and connect to AC power. Use ONLY the power supply provided with your MicroField unit.
General Functions Replacing the Batteries You should change the batteries in your MicroField if the unit does not give you a sufficient amount of time for your needs after being fully charged. MicroField uses four (4) AA NiMH rechargeable batteries. Only replace the batteries with the same type (NiMH) and a capacity of 1600mA or greater. Use good quality batteries. To replace the batteries: Turn the unit off. Turn the unit upside down.
General Functions Battery Replacement Continued Replace with new NiMH batteries, observing correct polarity. Carefully replace the lid. Make sure it is aligned correctly. Turn the unit upside down. Replace the four screws. Charge the batteries for 13 hours before first use. WARNING: do not use alkaline batteries in your MicroField. Charging alkaline batteries may result in physical harm, destruction of property and/or fire. Phonak is not responsible for any damage caused by improper battery use.
Using MicroField for Rebroadcasting Setting Up The Transmit Channel 19
Using MicroField for Rebroadcasting - Setting the Transmit Channel Important Notes Your MicroField can receive audio signals and rebroadcast them directly to your MicroLink, MicroEar or other FM receiver. However, when you first get your MicroField, it is set up only to send audio signals to the headset jack. To use it with your MicroLink/MicroEar or with any other FM receiver, you will need to go through the setup process outlined in this section.
Using MicroField for Rebroadcasting - Setting the Transmit Channel Other Information Your MicroField’s transmission range is normally about 5 - 10 feet (1.5 - 3 meters). If a cable is plugged into the AUX connector, the transmission range is increased to 30 - 40 feet (9 - 12 meters). When using MicroField for rebroadcasting, set its volume control at about 15 to ensure the best audio levels. To change volume, use the controls on your hearing aid or receiver.
Using MicroField for Rebroadcasting - Setting the Transmit Channel Transmitting to a Phonak MicroLink or MicroEar Receiver IMPORTANT: Before starting this procedure, verify that your Phonak transmitter is turned OFF and MicroField is not near a computer or other device that generates RF energy. Your MicroField must be running on batteries rather than the power supply. Determine the channel of your MicroLink or MicroEar (for example, 9). Press PRESET and SEARCH at the same time on your MicroField.
Using MicroField for Rebroadcasting - Setting the Transmit Channel Transmitting to other 216MHz FM Receivers If using a personal transmitter, turn it off; your MicroField must be running on batteries rather than the power supply. Find your product in the channel selection tables in Appendix B, and determine the MicroField channel number that corresponds with your product. For example, Phonic Ear #51 = MicroField Channel #29. Press the PRESET and SEARCH buttons at the same time on your MicroField.
Using MicroField for Rebroadcasting - Setting the Transmit Channel Setting up MicroField For Use With an External 72MHz Transmitter and Receiver If you are currently using a 72 MHz transmitter to broadcast signals to your FM receiver, you can set up MicroField to work with your existing transmitter. Your external 72 MHz transmitter broadcasts on a specific frequency, which is then picked up by your FM receiver.
Using MicroField for Rebroadcasting - Setting the Transmit Channel Setting up MicroField For Use With an External 72MHz Transmitter and Receiver cont. Connect your transmitter to MicroField using the optional transmitter cable* from Phonak. Plug in the cable between the headphone jack of your MicroField and the AUX (or mic) input on your transmitter. Press the Search and Preset buttons together. The PGM symbol on the display will appear.
Using MicroField For Rebroadcasting Setting up the Receive Channel 26
Important Notes MicroField will receive audio signals from a minimum of 5 feet (1.5 meters) from the transmitting antenna to a maximum of approximately 1000 feet (305 meters), depending on the type of transmitter used. When searching for audio signals, make sure your MicroField unit is not near a computer. Computers cause interference which may prevent your unit from finding a signal.
Using MicroField for Rebroadcasting - Setting the Receive Channel Finding a Receive Channel Using Automatic Search When CH is illuminated, your MicroField is in Search mode. When SE is flashing, this indicates the unit is searching for a channel. 28 To find an audio signal automatically, press the SEARCH button momentarily. MicroField will search all available frequencies for valid audio signals.
Using MicroField for Rebroadcasting - Setting the Receive Channel Finding a Receive Channel Using Manual Search To find an audio signal* manually, press and HOLD the Search button until the CH symbol is shown on the display. Then, press the UP/DOWN keys repeatedly until you find the desired channel. Keep in mind that the first channel you find may not have the clearest signal; you should tune to the exact channel number of the desired audio signal by using the UP and DOWN buttons.
Using MicroField for Rebroadcasting - Setting the Receive Channel Storing a Preset Channel MicroField allows you to store frequently-used channels into presets (P1 through P7). This gives you the ability to quickly find the channel you use frequently. To store a preset: Find the receive channel you want to store using the automatic or manual search function. For example, if you want to store channel 18, use search until channel 18 is displayed. Press and hold the Preset button.
Using MicroField for Rebroadcasting - Setting the Receive Channel Selecting a Preset Channel For Use To select a preset, press and release the PRESET button repeatedly until the desired preset number appears in the display. There are a total of 7 preset locations available, P1 through P7. In addition to the 7 preset channels, the “last searched” channel is also displayed. For example: the first three presets are programmed and the last searched channel was channel 52.
Using MicroField for Rebroadcasting - Setting the Receive Channel Locking Preset Channels Operating Your MicroField Locking presets will prevent accidental erasure or changing of stored receive channels in the presets. Press Preset and then the UP button to lock the presets. A padlock will appear in the display indicating the presets are locked.
Using MicroField for Rebroadcasting - Setting the Receive Channel Using the Infrared (IR) Receiving Cable Many cinemas, live theaters, courtrooms or similar places transmit audio signals to portable receivers via infrared emitters. To receive these signals, you will need to use the infrared receiving cable with your MicroField. Be sure to position the IR sensor so that Microfield can pick up the signal.
MicroField as a Receiver 34
MicroField as a Receiver Important Notes MicroField will receive audio signals from a minimum of 5 feet (1.5 meters) from the transmitting antenna to a maximum of approximately 1000 feet (305 meters), depending on the type of transmitter used. When using your MicroField, make sure the unit is not near a computer. Computers cause interference which may disrupt your reception.
MicroField as a Receiver Using the Headset Jack Headset, Earphone, or Neckloop Use Connect your headset, earphone or neckloop to the headset jack when using MicroField as a receiver. MicroField can be connected to a headset, earphone or neckloop. Securely plug the device into the headset jack. Stereo or mono mini (3.5 mm) plugs can be used. Adjust the volume to a comfortable listening level using the UP / DOWN buttons.
MicroField as a Receiver Using the Optional Speaker Phonak offers an optional speaker for your MicroField unit which fits in the carrying case. This allows you to use your MicroField for personal soundfield applications. Plug the speaker cable into MicroField’s headset jack. Position the speaker in the case so the speaker grid is facing outside. After locating your receive audio signal (see pages 28-29), adjust volume to a comfortable level using the UP / DOWN buttons.
Operating Your MicroField MicroField as a Transmitter 38
MicroField as a Transmitter Using the Auxiliary Input With a Microphone To use the optional microphone, securely plug it into the AUX IN jack. You should only use a microphone supplied by Phonak for this purpose. When you plug a device into the AUX IN jack, two additional functions are triggered in MicroField: The transmission range of the internal transmitter is increased. The auto shut-off function (if enabled) is disabled.
MicroField as a Transmitter Using the Auxiliary Input With Your TV or Other Device Replacing the Batteries Cont. MicroField can be directly connected to your TV set, DVD, CD player, computer or other similar devices. This allows you to listen to this device through your FM receiver via MicroField. Connect the optional cable* to the AUX IN jack on your MicroField. Connect the other end to your TV or other device.
Troubleshooting 41
Troubleshooting When using MicroField for rebroadcasting, my MicroLink / MicroEar sounds distorted. Troubleshooting and FAQ Your MicroField’s volume is too high. Set your MicroField’s volume control at 15, then use the hearing aid to adjust volume. When I press the Preset button, the display reads 00 and I can’t find any presets. This is normal. The unit has been set to factory defaults. No channel or preset has been programmed.
Troubleshooting When I try to store a preset, the display flashes, but I cannot store the preset. The presets are probably locked (look for the padlock symbol in the display). To unlock the presets, see page 32. The receive channel is shown in the Channel Selection Guide, but I cannot tune to this channel. MicroField will not receive channels at or near its programmed transmit channel (see Appendix A for details).
Troubleshooting At a movie theater, we could not pick up the transmission. Make sure the IR cable is plugged in all the way. Point the sensor around the room until you get the signal. Sometimes the signal is behind you. Tip: before entering the theater, set your MicroField to channel 91. Most theaters use channel 91 or 92 for infrared transmissions. The audio signal is distorted. When searching for a channel, your MicroField may not stop at the clearest channel.
Troubleshooting The batteries are not charging. Make sure you are using the correct power supply and that it is connected to a working power outlet. My batteries don’t last very long. It is time to replace the batteries. See page 17. My MicroField keeps turning off by itself. The auto shut-off function may be enabled (the I/O symbol will be illuminated); see page 13. Or the batteries may be dead; try charging the batteries. The unit is not turning off automatically.
Troubleshooting I need more transmission range on my MicroField. To increase the transmission range, plug the auxiliary cable into the AUX IN jack. How is the AUX IN jack wired? Tip is the microphone input; Ring is a line input. The microphone that is connected to the AUX IN does not work or is distorted. You may be using the wrong type of microphone. Contact Phonak for assistance. I can’t get the audio from my TV to MicroField. This requires a special cable from Phonak.
Compliance Notice 47
Compliance Notices Phonak MicroField 216 MHz transmission: Compliance Notices The MicroField transmitter is authorized by rule under the Low Power Radio Service (47 C.F.R. Part 95) and must not cause harmful interference to TV reception or United States Navy SPASUR installations. You do not need an FCC license to operate this transmitter.
Compliance Notices FCC Statement This equipment has been tested and found to comply 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.
Appendix 50
N12 N13 N16 N17 N18 N61 N62 N52 N64 N65 N68 N69 N55 N72 N73 N57 N76 N77 N79 N60 N80 200 175 75 50 25 0 75 100 125 200 225 250 275 312 375 350 475 275 250 150 125 100 75 0 25 50 125 150 175 200 237 300 275 400 375 350 250 225 200 175 50 25 0 25 50 75 100 137 200 175 300 500 475 375 350 325 300 175 150 125 50 25 0 0 12 75 50 175 150 162 275 250 312 375 350 450 462 425 525 500 400 375 350 325 200 175 150 75 50 25 0 12 50 25 150 125 137 250 225 287 350 325 425 437 400 563 538 437 412 3
Appendix B: Channel Selection Guide To use this guide, find the channel number of your product and note the corresponding channel number in MicroField. You will use the MicroField channel number (first column) for programming or using your unit. 216 MHz Channels II MicroField Channel Frequency (MHz) Phonak Listen 1 216.0125 N01 1A 41 216.0250 2 216.0375 21 216.0625 1B 42 216.0750 2B 4 216.0875 N04 3B 5 216.1125 N05 1C 43 216.1250 2C 22 216.1375 3C 23 216.1625 1D 44 216.
Appendix B: Channel Selection Guide MicroField Channel Frequency (MHz) 45 216.2250 2E 24 216.2375 3E 25 216.2625 1F 46 216.2750 2F 12 216.2875 N12 3F 13 216.3125 N13 1G 47 216.3250 2G 26 216.3375 3G 27 216.3625 1H 48 216.3750 2H 16 216.3875 N16 3H 17 216.4125 N17 1J 49 216.4250 18 216.4375 N18 3J C18 61 216.5125 N61 1K C21 29 216.5250 62 216.
Appendix B: Channel Selection Guide MicroField Channel Frequency (MHz) Phonak 28 Channel 216.56Selection 25 IV Listen Phonic Comtek Ear Telex AVR Williams Light Speed Drake Gentner Guide1L - 216 MHz cont. 52 216.5750 N52 2L 52 I 64 216.5875 N64 3L C24 65 216.6125 N65 1M C25 53 216.6250 2M 81 216.6375 3M 82 216.6625 1N 54 216.6750 2N 68 216.6875 N68 3N 69 216.7125 N69 1P 55 216.7250 N55 2P 83 216.7375 3P 84 216.7625 1R 56 216.7750 2R 72 216.
Appendix B: Channel Selection Guide MicroField Channel Frequency (MHz) Phonak Listen 76 216.8375 N76 3S 85 216.8625 1T 58 216.8750 2T 86 216.8875 3T 77 216.9125 59 216.9250 2U 88 216.9375 3U 79 216.9625 N79 1V 60 216.9750 N60 2V 80 216.9875 N80 3V 00 NONE N77 Phonic Comtek Ear Telex AVR Williams Light Speed Drake Gentner Channel Selection Guide - 216 MHz cont.
Appendix B: Channel Selection Guide 72 MHz Channels VI MicroField Channel Frequency (MHz) 1A 72.0250 1 1 1 1 11 2A 72.0750 2 2 2 2 12 A 72.1000 A A A A A 3A 72.1250 3 3 3 3 14 4A 72.1750 4 4 4 4 15 K 72.2000 K 5K 72.2250 5 5 5 5 16 6K 72.2750 6 6 6 6 17 B 72.3000 B B B C B 7B 72.3250 7 7 7 7 19 8B 72.3750 8 8 8 8 20 N 72.4000 N 9N 72.4250 9 9 9 9 21 0N 72.4750 10 10 10 10 22 C 72.5000 C C C E C 1C 72.
Appendix B: Channel Selection Guide MicroField Channel Frequency (MHz) O 72.6000 O 2O 72.6250 13 13 13 13 26 4O 72.6750 14 14 14 14 27 D 72.7000 D D D G D 5D 72.7250 15 15 15 15 29 6D 72.7750 16 16 16 P 72.8000 P 7P 72.8250 17 17 17 17 31 8P 72.8750 18 18 18 18 32 E 72.9000 E E E I E 9E 72.9250 19 19 19 19 34 0E 72.9750 20 20 20 20 35 3E 74.6250 33 33 33 33 36 4E 74.6750 34 34 34 34 37 I 74.
Appendix B: Channel Selection Guide VIII MicroField Channel Frequency (MHz) 7I 75.2250 37 37 37 37 41 8I 75.2750 38 38 38 38 42 J 75.3000 J J J P J 9J 75.3250 39 39 39 39 44 0J 75.3750 40 40 40 40 45 R 75.4000 R 1R 75.4250 21 21 21 46 2R 75.4750 22 22 22 47 F 75.5000 F F F 3F 75.5250 23 23 23 49 4F 75.5750 24 24 24 50 S 75.6000 S 5S 75.6250 25 25 25 51 6S 75.6750 26 26 26 52 G 75.7000 G G G 7G 75.
Appendix B: Channel Selection Guide MicroField Channel Frequency (MHz) T 75.8000 T 9T 75.8250 29 29 29 56 0T 75.8750 30 30 30 57 H 75.9000 H H 1H 75.9250 31 31 31 57 2H 75.9750 32 32 32 60 00 NONE Phonak Listen Phonic Comtek Ear Telex AVR Williams M N H Light Speed Drake Gentner 75.8 34 75.
Channel Selection Guide - Infrared (IR) X MicroField Channel Frequency (MHz) 91 95kHz IR 92 250kHz IR 93 2.06MHz IR 94 2.3MHz IR 95 2.56MHz IR 96 2.8MHz IR 97 3.3MHz IR 98 3.
XI
FM Division Contact Information Telephone: 1.888.777.7316 Website: www.Phonak-US.com Address: 4520 Weaver Parkway Warrenville, IL 60555-3927 Version 031020. Copyright© 2003 Phonak Hearing Systems. All Rights Reserved.
