Sam Ash Music CR277 Wireless Microphone Receiver User Manual

Sam Ash Music Corporation Wireless Microphone Receiver

User Manual

Copyright 2009, Samson Technologies Corp.Printed, January 2009 v1Samson Technologies Corp.45 Gilpin AvenueHauppauge, New York 11788-8816Phone: 1-800-3-SAMSON (1-800-372-6766)Fax: 631-784-2201 www.samsontech.com
Table of ContentsIntroduction / System Features. . . . . . . . . . . . . . . . . . . . . . . . . 1System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Guided Tour - CR277 Front Panel. . . . . . . . . . . . . . . . . . . . . . . . 3Guided Tour - CR277 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . 4Guided Tour - HT7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Setting Up and Using the Concert Series System . . . . . . . . . . . . 6-8Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Concert Series Frequency Conversion Chart . . . . . . . . . . . . . . . .10
11Introduction / System FeaturesCongratulations on purchasing the Samson CR277 Dual Microphone Wireless System! The CR277 system is the perfect solution for any application requiring two, high quality, wireless microphones in a compact package. The system features the CR277 dual channel, diversity receiver including dual antennas, vivid RF meters and Peak indicators for each channel, plus individual and mixed balanced outputs jacks. Also included are two HT7 handheld microphone transmitters fitted with the Samson Q7 dynamic microphone element. The Q7 produces a robust and articulate sound thanks to its extended frequency response and its cardioid pick-up pattern greatly reduces the chance of feedback. With the CR277 system, you’ll have great sound quality with clear reception and the ability to walk freely around your venue. For live sound, karaoke, school, conferences, and Houses of Worship the CR277 is an ideal solution for dual channel wireless microphones providing outstanding performance and reliably.Although this product is designed for easy operation, we suggest you first take some time to go through these pages so you can fully understand how we’ve implemented a number of unique features. Your wireless system consists of three components— two microphone transmitters and a dual channel receiver, which must be tuned to the same channels (that is, the same radio frequency) in order to operate correctly. The Samson Concert Series system you have purchased operates in the HDTV free UHF frequency range and contains a CR277 dual channel receiver and two of our HT7 hand-held microphone transmitters with the Samson Q7 dynamic capsule.In this manual, you’ll find a detailed description of the features of the Concert Series Wireless system, as well as a guided tour through all components, step-by-step instructions for setting up your system, wiring diagrams and tables, and full specifications. If your Concert Series system was purchased in the United States, you’ll also find a warranty card enclosed—don’t forget to fill it out and mail it! This will enable you to receive online technical support and will allow us to send you updated information about this and other Samson products in the future. Also, be sure to check out our website (www.samsontech.com) for complete information about our full product line.SPECIAL NOTE for U.S. purchasers: Should your Concert Series Wireless system ever require servicing, a Return Authorization number (RA) is necessary. Without this number, the unit will not be accepted. If your Concert SeriesWireless system was purchased in the United States, please call Samson at 1-800-372-6766 for a Return Authorization number prior to shipping your unit. If possible, return the unit in its original carton and packing materials. If your Concert Series Wireless system was purchased outside of the U. S., contact your local distributor for servicing information.* Your receiver and transmitter have been factory preset to utilize the same channel. A listing of the six available channels and their corresponding UHF frequencies can be found on page 10 of this manual.
22System FeaturesDesigned for use in both live sound and sound contracting applications, the Samson Concert Series Wireless System provides a high performance, cost effective solution, utilizing state-of-the-art technology in wireless communications. Main features include:• Six different available channels in three pairs, all operating in the less crowded UHF bandwidth, and all designed for simultaneous use. This means that you can use multiple Concert Series systems (each tuned to different channels) in the same location without interference.• Technological breakthrough usage of Dielectric filters for extremely precise and stable tuning.• Diversity technology maximizes active range (up to 300 feet) and reduces potential interference problems.• The CR277 receiver is a half-rack unit that can be used freestanding or can be mounted in any standard 19" rack,* making it easy to integrate into any traveling or fixed installation audio system. It includes a pair of tuned antennas and provides both balanced and unbalanced outputs, and continuously adjustable Volume and Squelch controls, as well as an audio peak LED, a six-segment Audio level meter and a six-segment RF level meter.• Built-in companding noise reduction in all components for crystal-clear sound with minimized background noise and hiss.• Transmitters provide “popless” muting (which turns off the audio signal while leaving the carrier signal on) and use standard 9-volt batteries, with battery life of more than 12 hours. The Concert transmitters also provide a convenient Battery Strength LED meter, allowing you to monitor the remaining power in the installed battery. • The HT7 hand-held microphone transmitter is fitted with the Samson Q7 Neodymium dynamic microphone capsule. • All components have rugged construction that ensures reliable operation in even the most demanding performance environments.* Using an optional Samson RK55 rack adapter kit
3Guided Tour - CR277 Front Panel1: Antennas (Channels A and B) - The antenna mountings allow full rotation for optimum placement. In normal operation, both Antenna A (the antenna on the left) and Antenna B (the antenna on the right) should be placed in a vertical position. Both antennas can be folded inward for convenience when transporting the CR277. See the “Setting Up and Using the Concert Series System” section on page 6 in this manual for information about antenna installation and positioning.2: RF (Radio Frequency) Level meter - This “ladder” display (similar to the VU bar meter used on audio devices) indicates the strength of the incoming radio signal. When the “100%” segment is lit, the incoming RF signal is fully modulated and at optimum strength. When only the second most left-most “10%” segment is lit, the incoming signal is at just 10% of optimum strength. If no segments are lit, little or no signal is being received. See the “Setting Up and Using the Concert Series System” section on page 6 in this manual for more information.3: Volume (Channel B) / Power switch - Use this to turn the CR277 power on and off. When the receiver is on, the Power LED is lit. The control knob sets the level of the audio signal being output through the Channel B output jack on the rear panel (see #2 on page 4 in this manual). Reference level is obtained when the knob is turned fully clockwise (to its “10” setting).4: Audio PEAK LED - When the LED is lit, the signal is overloading and the HT7's input Level adjustment must be attenuated. See the “Setting Up and the Concert Series System” section on page 6 in this manual for more information.5: Power LED - When the receiver is on, the red Power LED will illuminate.6: Volume control (Channel A) - This knob sets the level of the audio signal being output through the Channel A output jack on the rear panel (see #6 on page 4 in this manual). Reference level is obtained when the knob is turned fully clockwise (to its “10” setting).
41: MIX OUT switch - Sets the OUTPUT B balanced output to send either the combined signal for Channel A and B when the switch is in the "ON" position, or to just Channel B when in the "OFF" position. See the “Setting Up and Using the Concert Series System” section on page 6 in this manual for more information. 2: OUTPUT B / MIX OUT - Use this electronically balanced low impedance (600 Ohm) 1/4-inch TRS (Tip Ring Sleeve) jack when connecting the CR277 to your mixer or amplifier equipment. Depending on the position of the MIX OUT (#1) switch, the jack will carry the signal from receiver Channel B, or with the MIX OUTPUT switch set to "ON", the jack will carry the combined signal from receiver Channel A and B.3: Squelch B control - This control determines the maximum range of the CR277 Channel B receiver before audio signal dropout. Although it can be adjusted using the supplied plastic screwdriver, it should normally be left at its factory setting. See the “Setting Up and Using the Concert Series System” section on page 6 in this manual for more information.4: DC input - Connect the supplied 15 volt 350 mA power adapter here, using the strain relief as shown in the illustration below. WARNING: Do not substitute any other kind of power adapter; doing so can cause severe damage to the CR277 and will void your warranty.Using the strain relief: Gather up a loop of wire and pass it through the strain relief, then pass the adapter plug through the loop in order to create a knot. 5: Squelch A control - This control determines the maximum range of the CR277 Channel A before audio signal dropout. Although it can be adjusted using the supplied plastic screwdriver, it should normally be left at its factory setting. See the “Setting Up and Using the Concert Series System” section on page 6 in this manual for more information.6: OUTPUT A - Use this electronically balanced low impedance (600 Ohm) 1/4-inch TRS (Tip Ring Sleeve) jack when connecting the CR277 Channel A receiver to your mixer or amplifier.Guided Tour - CR277 Rear Panel1234 5 6CR277-
5Guided Tour - HT71: Audio on-off switch - When set to the “on” position, audio signal is transmitted. When set to the “off” position, the audio signal is muted. Because the carrier signal remains during muting, no “pop” or “thud” will be heard. Note that turning this off does not turn off the transmitter power—it is simply a way to temporarily mute the transmission of audio signal. If you don’t plan on using the transmitter for extended periods, turn off the transmitter power by using the power ON-OFF switch (see #3 below).2: Battery level meter - This set of three multicolored LEDs indicates relative battery power, indicating whether the installed battery is at low (red), mid (yellow) or high (green) strength. One of these will light whenever the HT7 is powered on (see #3 below). When the red “low” indicator lights, RF performance is degraded and the battery needs to be replaced.3: Power ON-OFF switch* - Use this to turn the HT7 on or off (to conserve battery power, be sure to leave it off when not in use).4: Microphone Input Level control (trim-pot) - This input sensitivity control has been factory preset to provide optimum level for the particular microphone capsule provided with your Concert 277 system and so we recommend that this not be adjusted manually. If necessary, however, you can use the supplied plastic screwdriver to raise or lower the input level. See the “Setting Up and Using the Concert Series System” section on page 6 in this manual for more information.5: Battery holder - Insert a standard 9-volt alkaline battery here, being sure to observe the plus and minus polarity markings shown. We recommend the Duracell MN 1604 type battery. Although rechargeable Ni-Cad batteries can be used, they do not supply adequate current for more than four hours. WARNING: Do not insert the battery backwards; doing so can cause severe damage to the HT7 and will void your warranty.* Be sure to mute the audio signal at your external mixer or amplifier before turning transmitter power on or off, or an audible pop may result.
6Setting Up and Using theConcert Series System* Be sure to mute the audio signal at your external mixer or amplifier before turning transmitter(s) power on or off, or an audible pop may result.The basic procedure for setting up and using your Concert Series Wireless System takes only a few minutes:1. For the Concert Series system to work correctly, both the receiver and two transmitters must be set to the same channel. Remove all packing materials (save them in case of need for future service) and check to make sure that the supplied CR277 receiver HT7 transmitters are set to the same channel. If these channels do not match, contact your distributor or, if purchased in the United States, Samson Technical Support at 1-800-372-6766.2. Physically place the CR277 receiver where it will be used (the general rule of thumb is to maintain “line of sight” between the receiver and transmitter so that the person using the transmitter can see the receiver). An optional rack-mount kit (available from your Samson dealer) allows the CR277 to be mounted in a standard 19" rack if desired. Extend both “A” and “B” antennas and place both in a vertical position.3. Make sure the Power on-off switch in your HT7 handheld transmitter is set to “Off.”4. On each HT7 handheld transmitter, unscrew the bottom section of the microphone by turning it counterclockwise and then slide it off.5. Place a fresh 9-volt alkaline battery in the transmitter battery holder, taking care to observe the polarity markings. Replace the bottom section of the microphone by sliding it on and then screwing it back on. Leave the transmitters off for the moment.6. Make the physical cable connection between the CR277 output jack and the line or mic level audio input of your amplifier or mixer. The CR277 allows you to send a mixed signal of the two microphones to a single output, or send the two microphones separately through individual outputs. You can use the MIXED output to feed a single channel in your mixer. Set the CR277's rear panel MIX OUT switch to "ON" and both microphone outputs will be sent to the OUTPUT B/MIX OUT. If necessary, you can use the CR277 front panel Volume controls to set the balance between the two microphone. You can also use the individual Channel A and Channel B OUTPUTS to feed two separate channels on your mixer. Set the MIX OUT switch to "OFF". Leave your amplifier (and/or mixer) off at this time.7. Turn both of the Volume knobs on the CR277 completely counterclockwise. Using the strain relief, connect the supplied AC adapter to the DC Input on the rear panel of the CR277, then plug the adapter into any standard AC outlet. The front panel Power switch is integrated into the Channel B Volume knob. Turn the Channel B Volume knob just until it clicks to turn on the CR277; the red “Power” LED will light up, but all other front panel LEDs will remain unlit.
7Setting Up and Using theConcert Series System8. Turn on the power to one of the HT7 transmitter (using its Power on-off switch); the green “HIGH” Battery strength LED will light if the battery is sufficiently strong. At this point, a few segments in the CR277 front panel RF Level meter should light; the more are lit, the stronger the RF signal. If only one or two segments light (indicating a relatively weak signal), try relocating the CR277 or changing the position of one or both of its antennas. If all six segments light, the CR277 is receiving an optimally strong RF signal and is placed and positioned correctly.9. Now it’s time to set the audio levels. Turn on your connected amplifier and/or mixer but keep its volume all the way down. Next, make sure that your transmitter is un-muted by setting its Audio switch to “On.” Then set the Volume knob on the CR277 fully clockwise (to its “10” setting); this is unity gain. Speak or sing into the mic at a normal performance level while slowly raising the volume of your amplifier/mixer until the desired level is reached. 10. If you hear distortion at the desired volume level, first check to see whether the red “Peak” LED on the CR277 is lit. If it is not, make sure that the gain structure of your audio system is correctly set (consult the owners manual of your mixer and/or amplifier for details). If the yellow “Peak” LED is lit, do the following:• On the HT7 transmitter, use the supplied plastic screwdriver to turn its Microphone Input Level control (trimpot) slowly counterclockwise (towards the “Min” position) until the distortion disappears.Note that, following this setup procedure, you can always lower the Volume knob of the CR277 in order to attenuate the output signal if necessary. 11. Conversely, if you hear a weak, noisy signal at the desired volume level, again make sure that the gain structure of your audio system is correctly set (consult the owners manual of your mixer and/or amplifier for details) and that the Volume control of the CR277 is fully clockwise (at its “10” setting). If it is and the signal coming from the CR277 is still weak and/or noisy, do the following:• On the HT7 transmitter, use the supplied plastic screwdriver to turn the Level control (trim-pot) on the transmitter slowly clockwise (towards the “Max” position) until the signal reaches an acceptable level.
88Setting Up and Using theConcert Series System12. Temporarily turn down the level of your mixer/amplifier system and turn off the power to your transmitter, leaving the CR277 on. Then restore the previously set level of your mixer/ampli-fier. With the transmitter off, the receiver output should be totally silent—if it is, skip ahead to the next step. If it isn’t (that is, if you hear some noise), you may need to adjust the CR277 front panel Squelch control. When the Squelch control is at its minimum setting, the Concert Series system always provides maximum range without dropout; however, depending upon the particular environment your system is used in, you may need to reduce that range somewhat in order to eliminate band noise when the transmitter is turned off. To do so, use the provided screwdriver to rotate the Squelch control completely counterclockwise (to the “Min” position), then slowly turn it clockwise until the noise disappears. If no noise is present at any position, leave it at its fully counterclockwise “Min” position (so as to have the greatest overall range available).13. When first setting up the Concert Series system in a new environment, it’s always a good idea to do a walk-around in order to make sure that coverage is provided for your entire performance area. Accordingly, turn down the level of your audio system and turn on both the transmitter and receiver. Then, with the transmitter un-muted, restore the level of your audio system and while speaking or singing, walk through the entire area that will need to be covered. Always try to minimize the distance between transmitter and receiver as much as possible so that the strongest possible signal is received from all planned transmission points. In fixed installations such as A/V or corporate conference rooms or for extended range applications (where the transmitter and receiver are more than 150 feet apart), it may be desirable to angle the antennas differently from their vertical position or to install the receiver in the same room as the transmitters (and, if neces-sary, to extend the wiring to remote audio equipment).If you have followed all the steps above and are experiencing difficulties, contact your local dis-tributor or, if purchased in the United States, call Samson Technical Support (1-800-372-6766) between 9 AM and 5 PM EST.
9SpecificationsSystem Specifications Channels N:6, U:6, E:4, B:4 Frequency Type F3 Modulation Type FM Noise Reduction Type Compander/Expander Distance 300 feetTransmitter (HT7) Oscillation Type Direct PLL Pre-emphasis 50 µsec Antenna Integral Antenna Maximum Input Level 3 V p-p Battery Type Duracell MN1604 9-volt alkaline Operating Temperature -20° C / 55° C Switches / Controls Power ON/OFF, Audio ON/OFF, Mic Level Volume Display (LED) Battery Low/Mid/High (corresponds to <5.3 V / 5.3 - 7 V / >7V) Operating Voltage 9 Volts +20% / -40% Current Consumption 47 mA RF Power 10 mW Frequency Stability ±20 kHz Spurious Ratio 2.5 nW Deviation 20 kHz (16.5 kHz - 23.5 kHz) T.H.D. (Overall) 0.5% (3% max) (@AF 1 kHz, RF 46 dBu) AF Frequency Response 50 Hz - 15 kHz (±3 dB overall) Battery life 12 hoursReceiver (CR277) Oscillation Type PLL De-emphasis 50 µsec IF Frequency 10.7 MHz Antenna 1/4 Wavelength Rod In/Out DC Inlet, Balanced Output, Unbalanced Output Display (LED) Receiver A/B (Green), Power On (Red), Peak (Yellow), RF Level (5 pc) Level Control Audio Level Volume, Mute Level Control Operating Temperature 0° C / 50° C Operating Voltage 12 Volts ±10% Current Consumption 160 mA (at all LED lights) Receiving Frequency Range US: N Channels 642 - 646 MHz Export: U Channels: 801 - 805 MHz Sensitivity 18 dBµ (@ THD 2%) Squelch Sensitivity 0 - 40 dBµ (Adjustable) Selectivity ±150 kHz (AF Out Ratio -60 dB) T.H.D. (Overall) 1% Max (@AF 1 kHz, RF 46 dBu) S/N Ratio (Overall) 90 dB (w/IHF-A Filter) Residual Noise 90 dBv (w/IHF-A Filter) Band Mute ±40 kHz / ±100 kHz (RF IN: 46 dBu EMF) AF Frequency Response 50 Hz - 15 kHz (±3 dB overall) Audio Output Level - Balanced -20 dBm (Line), -40 dBm (Mic) Audio Output Impedance - Balanced 600 OhmsSpecifications subject to change without notice.15350
10Concert Series Frequency Conversion Chart
FCC Rules and RegulationsSamson wireless receivers are certified under FCC Rules part 15 and transmitters are certified under FCC Rules part 74.Licensing of Samson equipment is the user’s responsibility and licensability depends on the user’s classification, appli-cation and frequency selected.This device complies with RSS-210 ofIndustry & Science Canada.Operation is subject to the following two conditions:(1) this device may not cause harmful interference and (2) this device must accept any interference received, includ-ing interference that may cause undesired operation.NOTE: 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 gener-ates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful inter-ference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the fol-lowing measures:• Reorient or relocate the receiving antenna.• Increase the separation between the equipment and receiver.• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.• Consult the dealer or an experienced Radio/TV technician for help.WARNING: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
Samson Technologies Corp.45 Gilpin AvenueHauppauge, New York 11788-8816Phone: 1-800-3-SAMSON (1-800-372-6766)Fax: 631-784-2201 www.samsontech.com

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