Cr187 compact receiver lectrosonics, inc. Rio rancho, nm operating instructions and trouble-shooting guide • wide range limiting • surface mount technology.
2 table of contents introduction .................................................................................................. 2 general technical description ............................................................ 3 controls and functions .....................................................
3 compact receiver rio rancho, nm – usa general technical description the cr187 receiver is comprised of six major functional subsystems: the rf front-end amplifier, the double bal- anced mixer/local oscillator, the first if filter, the second if filter and audio demodulator, the compandor, and the ...
4 controls and functions receiver front panel modulation leds indicate the modulation (audio level) of the incoming signal, and can be used for proper adjustment of the transmitter’s “mic level” or “gain”. The -20 led glows when the transmitter modulation is at a high enough level to produce a good ...
5 compact receiver rio rancho, nm – usa important! When the battery voltage drops below 6 volts, the power led will remain off, but the other 3 leds will light up and a loud rush of audio noise will be heard as the squelch opens. This condition is normal, and is easily remedied by replacing the batt...
6 receiver rear panel 12 vdc input connects to the supplied ch-12 ac adapter for powering the receiver from a 110/120v ac source. The receiver may also be powered from external 12 volt dc sources using the correct plug (switchcraft s-760 power plug). A diode bridge is used in the external power inpu...
7 compact receiver rio rancho, nm – usa antenna use and placement connect the antenna to the front panel jack. Position the antenna so that it is not within 3 or 4 feet of large metal surfaces. If this is not possible, try to position the antenna so that it is as far away from the metal surface as i...
8 operating instructions 1) connect the power cord or install the battery. (the cr187 is a negative ground device. Do not connect this receiver to a positive ground device through the audio cabling. Damage to either device could result.) 2) attach and extend the antenna. 3) connect the audio cable. ...
9 compact receiver rio rancho, nm – usa troubleshooting before going through the following chart, be sure that you have a good battery in the receiver (or a properly con- nected ac adapter). The power led should glow brightly. Symptom possible cause no power led 1) receiver switch in “off” position ...
10 specifications and features operating frequencies: 150mhz to 216mhz, crystal controlled sensitivity: better than 0.6uv for 20db quieting without compandor; 1.9uv for 50db s/n ratio with compandor signal/noise ratio: 102db a weighted squelch quieting: greater than 100db am rejection: -60db (10uv t...
11 compact receiver rio rancho, nm – usa service and repair if your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check out the intercon- necting...
Limited one year warranty the equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer. This warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warr...
