Clear-Com PRC-2 Instruction Manual Download Page 13

Vitec Group Communications
PRC-2 UHF Multi-Frequency Belt-Pack IFB Receiver

1 - 7

5. To STORE the frequency into a channel memory, depress the knob 

until the LED blinks the new channel number, then release the knob.  
The frequency is now stored in an open channel.

6. The unit will continue to scan/search for other frequencies.  To store 

more frequencies repeat steps 4 and 5 above.  Up to 5 frequencies 
can be stored in memory channels.

7. When all desired frequencies are stored switch the power to OFF for 

a few moments, then switch back to ON.  The unit will default to the 
channel number set by the switches and resume normal operating 
mode.

8. The first scan is made at low sensitivity and searches for only high 

level transmitter signals to avoid intermods.  If the receiver does not 
stop on any frequency in the first scan, that means an IFB 
transmitter was not detected.  In this condition the LED will change 
from a fast blink to a slow blink indicating the end of the scan.  The 
complete scan should take 15 to 40 seconds.

9. If the receiver still does not stop on any frequency, check that the 

transmitter is ON.  Also, if a frequency is not received or  received 
but distorted, some other signal may be interfering on that 
frequency.  Change the transmitter to another frequency and try 
again.
A second scan at high sensitivity is initiated by depressing the knob 
briefly at the end of the first scan to search for low level transmitter 
signals.  When the scan stops and the transmitter audio is heard, 
either SKIP or STORE the frequency (step 4 or 5 above).

10. Switching the POWER to OFF during any mode simply terminates 

that mode and returns the unit to normal operating mode when the 
power is switched back to ON.

ERASE ALL 5 CHANNEL MEMORIES

1. With power OFF, depress the knob and turn the unit ON.  Continue 

to hold the knob down until the LED starts rapidly blinking.  The 
memory is now erased and the unit will go into scan/search mode.

2. Continue from step 3 above PROGRAMMING - ADD NEW 

FREQUENCY….

MULTIPLE TRANSMITTER SETUP 

When using this IFB receiver in a search mode, with two or more 
transmitters running at the same time,  the receiver may stop on a 
false signal under the following conditions:

• Two transmitters are on and transmitting.

• The distance from the transmitters to the IFB receiver is less than 5 

feet.

The false hits are caused by intermodulation or mixing in the front end 
of the IFB receiver.  At a 5 to 10 foot distance, the two carriers are so 
strong at the receiver, that even this well designed front end will mix 
the carriers and produce phantom frequencies. The IFB receiver then 
halts its scan and stops on these false frequencies.  All receivers will 

Summary of Contents for PRC-2

Page 1: ...PRC 2 UHF MULTI FREQUENCY BELT PACK IFB RECEIVER INSTRUCTION MANUAL CLEAR COM WIRELESS IFB...

Page 2: ...age Parkway Alameda CA 94501 U S A Vitec Group Communications Ltd 7400 Beach Drive IQ Cambridge Cambridgeshire United Kingdom CB25 9TP Vitec Group Communications Room 1806 Hua Bin Building No 8 Yong A...

Page 3: ...4 Frequency Adjustment 1 4 Receiver Operating Instructions 1 6 Receiver Normal Operation already programmed 1 6 Programming Add a New Frequency To the Next Open Channel1 6 Erase All 5 Channel Memorie...

Page 4: ...Vitec Group Communications PRC 2 UHF Multi Frequency Belt Pack IFB Receiver ii...

Page 5: ...ng periods of time 12 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has be...

Page 6: ...shock if the station is used improperly They also refer you to important operating and maintenance instructions in the manual Figure 1 Safety Symbols 8 hours at 90 dB SPL 4 hours at 95 dB SPL 2 hours...

Page 7: ...gged machined aluminum package for lasting performance in abusive environments Only the PRC 2 IFB Receiver is covered in this manual The companion PTX 3 transmitter is covered in a separate manual The...

Page 8: ...ore up to five additional frequencies accessible by pressing the knob The memory remains during power OFF and even with the battery removed The IFB PRC 2 Receiver uses 20 kHz FM deviation for efficien...

Page 9: ...the LED is RED the battery is nearly depleted and should be replaced PROGRAMMING FUNCTIONS In the programming mode the LED will blink at a fast rate to indicate scanning for an active frequency It als...

Page 10: ...nce phones 600 to 2000 Ohms will have an inherently lower power level due to their high impedance and likewise low impedance phones may be extremely loud CAUTION Always set the Audio Level knob to min...

Page 11: ...Vitec Group Communications PRC 2 UHF Multi Frequency Belt Pack IFB Receiver 1 5 Figure 1 4 Frequency Adjustment Controls Figure 1 5 Frequency Adjust Figure 1 6 R1a Block Diagram...

Page 12: ...encies have been stored in the memory change channels by pressing the knob briefly and release The LED will blink the next channel number frequency and the receiver will resume operation on that chann...

Page 13: ...e the transmitter to another frequency and try again A second scan at high sensitivity is initiated by depressing the knob briefly at the end of the first scan to search for low level transmitter sign...

Page 14: ...er for an hour or less Make sure your batteries are marked alkaline or lithium Short battery life is almost always caused by weak batteries or batteries of the wrong type A green LED corresponds to a...

Page 15: ...Vitec Group Communications PRC 2 UHF Multi Frequency Belt Pack IFB Receiver 1 9 Figure 1 7 Battery Replacement...

Page 16: ...efer to Programming Add a New Frequency on page 7 Distorted sound Transmitter gain audio level is far too high Check mod level lamps on transmitter as it is being used Refer to Operating Instructions...

Page 17: ...Receiver antenna missing or obstructed Headphone cable is the antenna Transmitter antenna missing or obstructed Operating range too great Short range Receiver earphone cable is also the antenna Make s...

Page 18: ...Vitec Group Communications PRC 2 UHF Multi Frequency Belt Pack IFB Receiver 1 1 2...

Page 19: ...stal Controlled Phase Locked Loop Sensitivity 1 uV 20 dB SINAD Signal Noise ratio 95 dB A weighted Squelch quieting 90 dB AM rejection 50 dB 10 uV to 100 mV Modulation acceptance 20 kHz Spurious rejec...

Page 20: ...proximately 8 hours operation Power consumption 60 mA Allen wrench for knob 0 035 Weight 7 3 oz with battery Size 3 6 x 2 4 x 0 8 inches housing only belt clip and knob extend beyond the housing Notic...

Page 21: ...warranty of 90 days Headsets handsets microphones and spare parts have a limited warranty of one year UHF wireless IFB products have a limited warranty of one year UHF wireless intercom systems have...

Page 22: ...ailures use the following contact information Europe Middle East and Africa Tel 44 1223 815000 Email SalesSupportEMEA vitecgroup com North America Canada Mexico Caribbean US Military Tel 1 510 337 660...

Page 23: ...NOT APPLY TO YOU IN ANY EVENT TO THE MAXIMUM EXTENT PERMITTED UNDER APPLICABLE LAW VGC S LIABILITY TO CUSTOMER HEREUNDER SHALL NOT UNDER ANY CIRCUMSTANCES EXCEED THE COST OF REPAIRING OR REPLACING AN...

Page 24: ...Vitec Group Communications Warranty i v...

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