Okayo C 7192C Operating Instructions Manual - Important
Okayo Wireless Audio Link System
Okayo Wireless Audio Link System
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The C 7281A and C 7282A wireless receiver and transmitter combination provides an ideal solution for extending a PA
system to a nearby building where cabling is impossible or impractical to install.
The desktop transmitter accepts a standard paging microphone or line level feed from the existing PA system and
transmits it to the receiver unit in the remote location. This then feeds the signal into the amplifier at that location.
This allows any program source fed into the primary amplifier to be relayed to the remote PA system. Ideal for both
permanent or temporary installations such as PA systems at carnivals, sporting events, mine sites, construction sites,
agricultural shows etc. Transmission range up to 100m line of sight in ideal conditions.
Setup
The C 7281A receiver unit integrates with the “C” series Okayo handheld & beltpack lavalier transmitters for use as a
standard UHF wireless system for direct connection to an amplifier. It may also be used with Okayo portable PA units
fitted with the C 7189C wireless link transmitter.
When used with the C 7282A transmitter it allows you to send the audio signal from one PA system to another without
the use of cables (up to 100m away - in ideal conditions). See Fig. 1 below:.
Receiver Operation (C 7281A)
Switch on/Switch off
• Turn Channel A / B knob (2) / (5) clockwise until a click occurs. The LCD will then display the text “On”. After a few
seconds, the LCD window will show a channel number and a signal strength.
• Turn Channel A / B knob (2) / (5) counter clockwise until a click occurs. The screen will then show “OFF” for about
three seconds, and then go dark.
Setting and Selection of Channels:
NOTE: Channel A and Channel B cannot be set with the same channel number at the same time.
• Press and hold SET (4) to enter the channel selection mode. If Channel A is on, the channel number of Channel A
that is shown on the screen starts to blink. Press the Up or Down Frequency arrows (3) to choose your preferred
channel number. Press SET again to confirm the channel setting.
• Perform the same process on Channel B after switching that channel on.
• If you don’t press any button on the panel within 10 seconds, the receiver will exit the channel setting mode and
retain the channel number.
70 - 100m
Amplifier
Amplifier
Figure 1: Extending a PA system Wirelessly
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Overall System
Carrier frequency range: ............520-544MHz (16 - 96 channels)
LCD indication: ....................................Channel, Signal strength
Frequency selection:................................SET, UP, DOWN Arrows
Frequency modulation ............................................24MHz (max)
Dynamic range: ................................................................110dB
Total harmonic distortion: ..................................Less than 0.5%
Pre/de-emphasis: ................................................................50μs
Silent mode: ....................Tone key and noise lock dual-squelch
Frequency response: ..............................................70Hz - 17kHz
Range: ..........................................................................70-100m
C 7281A Receiver Unit
Antenna connection: ............................................................TNC
Audio output: ..........................6.35mm jack, 3 pin XLR balanced
Output level:......................XLR: 1V / 600 Ω (@AF input 300 mV)
Hi: 730 mV / 2k Ω (@AF input 300 mV)
Low: 80 mV / 2k Ω (@AF input 300 mV)
Power supply: ..........................................12V DC. 0.6A plugpack
Size: ......................................................210D x 215W x 44Hmm
Weight ................................................................................1.2kg
C 7282A Transmitter Unit
Antenna connection: ............................................................TNC
Audio input: ........6.35mm jack, 3 pin XLR balanced, stereo RCA
Audio output:..................Stereo RCA & 6.35mm headphone jack
RF output: ....................................................................10-30mW
Aux input: ........................................................................700mV
Aux output:..............................................................................1V
Mic input sensitivity: ..........................................................10mV
Headphone output:......................................................0.5W/32Ω
Power supply: ............................................12V d.c. 1A plugpack
Size: ......................................................214D x 187W x 44Hmm
Beltpack Transmitter (C 7195C)
Mic Insert: ..................................................................Condenser
RF Output: ........................................................................10mW
Spurious Emission:........................................................<250mW
Audio Input: ..........................................................Mic in, Aux in
AF Controls: ..................................Mute switch, hi/mid/lo switch
Battery: ............1.2V NiMH rechargeable x 2 or 1.5V Alkaline x 2
Operating Life (fully charged) 11 hrs (NiMH) or 14 hrs (Alkaline)
Dimensions: ......................................................88 x 64 x 24mm
Weight (with batteries):........................................................170g
Handheld Transmitters (C 7192C/C 7193C)
Mic Insert C 7192C: ......................................................Dynamic
Mic Insert C 7193C:....................................................Condenser
RF Output: ........................................................................10mW
Spurious Emission:........................................................<250mW
AF Controls: ....................................................Hi/lo/mute switch
Battery: ............1.2V NiMH rechargeable x 2 or 1.5V Alkaline x 2
Operating Life (fully charged) 11 hrs (NiMH) or 14 hrs (Alkaline)
Dimensions: ..........................................................46Ø x 264mm
Weight (with batteries):........................................................280g
Specfications
IMPORTANT
Maintenance / Operation Guidelines
Avoid excessive heat: Do not leave units in direct sun for extended periods, in front of heaters or any source of
high temperature
Avoid rough handling: Transmitter or receiver may be damaged if dropped
Remove batteries: Remove batteries from transmitters when not in use.
Replace batteries: Ensure replacement batteries are the same or equivalent to existing. Batteries may explode
under charge or unit may malfunction if incorrect batteries are used.
Battery terminals: Ensure battery contacts are clean and free of corrosion before operation. If corrosion occurs it
could be a sign of faulty batteries. Return to your place of purchase if service is required.
C 7282A Transmitter
C 7281A Receiver