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INSTRUCTION MANUAL

R172 DUAL-RECEIVER

LECTROSONICS, INC.
581 Laser Road
Rio Rancho, NM 87124 USA
Tel (800) 821-1121 or (505) 892-4501
fax (505) 892-6243
e-mail:

[email protected]

web:

www.lectrosonics.com

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Содержание R172

Страница 1: ...INSTRUCTION MANUAL R172 DUAL RECEIVER LECTROSONICS INC 581 Laser Road Rio Rancho NM 87124 USA Tel 800 821 1121 or 505 892 4501 fax 505 892 6243 e mail sales lectrosonics com web www lectrosonics com ...

Страница 2: ...stallation The RF signal first passes through RF filter coils coupled with ultra low noise J FETs The J FETs are used to provide enough gain to compensate for inherent losses in the filter stages Crystal controlled oscillators are used to minimize drift and are stable over a wide range of temperatures The output of the front end is then fed to a double balanced diode mixer which generates an inter...

Страница 3: ...iver Reduces the audio output levels of the XLR jacks in the rear by rotating the knob counter clockwise NOTE This control does not affect the MODULATION display the RF LED or the POWER LED it also does not affect the output level of the LINE LEVEL RCA jack RF LED Light when the transmitters are turned on If the carrier signal is too weak to produce a quality signal the lamp will go out Each chann...

Страница 4: ... the correct plug Switchcraft S 760 power plug the center pin is positive AUDIO OUTPUTS MIC LEVEL 3 pin XLR at microphone level 80mV max 200 ohm impedance for either balanced or unbalanced inputs LINE LEVEL RCA phono jack at line level 1 volt max 1K ohm impedance for unbalanced inputs The output level of this RCA jack is not affected by the front panel OUTPUT LEVEL control SEPARATE MIXED SWITCH Al...

Страница 5: ...Figure 2 R172 Rear Panel 4 ...

Страница 6: ...th one antenna Attach the single antenna to the BNC connector marked SNGL on the rear of the receiver Set the ANTENNA MODE switch to SNGL If the antenna is the telescoping whip extend the antenna to its full length The coaxial dipole antenna should be uncoiled and led away from the receiver The loop on the end is provided as a convenient attachment point The cable should be hung on a wall or suspe...

Страница 7: ...the whip DO NOT USE TWO TELESCOPING WHIPS ATTACHED SIDE BY SIDE AT THE RECEIVER There is little to no benefit of placing the antennas side by side Place the coaxial antennas in the same manner as described above The two antennas should be placed at least 6 ft apart for best reception This will put each antenna into a different signal path diversity and reduce the possibility of dropout Figure 4 Du...

Страница 8: ...rate and can be adjusted independently at the mixer or amplifier Connect the receiver with two cables to the amplifier or mixer Figure 5 Audio Connections 4 SET FRONT PANEL SWITCH TO ON POSITION Be sure the POWER LED lights 5 ADJUST TRANSMITTER MIC LEVEL See transmitter manual This is perhaps the most important step in the set up procedure See your transmitter manual for specific instructions on t...

Страница 9: ... occur The result would be a drop out A drop out sounds like either audible noise hiss or in severe cases may result in a complete loss of the sound when the transmitter is positioned in certain locations in the room A dropout normally sounds like hum or hiss Moving the transmitter even a few inches will change the hum or hiss or eliminate it A dropout situation may be either better or worse as th...

Страница 10: ... that a single audio output is available from the output of the last receiver in the chain The output level of the LINE LEVEL RCA jack is not affected by the OUTPUT LEVEL control The OUTPUT LEVEL control on the last receiver in the chain will control the combined volume of all the receiver outputs In order to control the receiver outputs independently you will need to use an external microphone mi...

Страница 11: ...D LEVEL LEDs ARE OFF Transmitter audio muted Make sure bottom panel A switch is turned on Push switch toward the letter A to turn the audio on NO SOUND BUT RECEIVER MOD LEVEL LEDs ARE ON 1 Receiver audio is muted Refer to receiver manual 2 Receiver audio output is disconnected or cable is defective or mis wired 3 Sound system or recorder input is turned down DISTORTED SOUND 1 Transmitter gain audi...

Страница 12: ...anced 100mV max RCA 1K ohm unbalanced 1 volt max Audio input RCA jack for unity gain audio mixing bus Antenna input BNC connectors 50 ohm impedance Controls OUTPUT LEVEL attenuators control A B balanced outputs POWER switch SEPARATE MIXED audio switch SNGL DUAL ANTENNA MODE switch Indicators POWER LED for power ON MODULATION LEDs for modulation level on each channel RF LED Power requirements 12 vo...

Страница 13: ...ont of this manual Out of warranty repairs are charged at a modest flat rate plus parts Since it takes almost as much time and effort to determine what is wrong as it does to make the repair there is a charge for an exact quotation We will be happy to quote approximate charges by phone RETURNING UNITS FOR REPAIR Please save yourself time and trouble by following the steps outlined below 1 Call or ...

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