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  3. VHF-238

RSQ VHF-238 Operating instructions

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VHF WIRELESS MICROPHONE
OPERATION MANUAL
VHF WIRELESS MICROPHONE
OPERATION MANUAL
VHF-238
VHF-238
VHF WIRELESS MICROPHONE
OPERATION MANUAL
1
Precautions
Hand-held microphone
Receiver unit/operation
Installation
Trouble shooting
Specifications
2
1. Unscrew the battery cover at the end of microphone, put a 9V battery into compartment with
correct polarities, then close the cover.
2. Pushing "ON/OFF" switch to "ON" position, "PWR" indic ator comes on b lue. If it does n't
come on, please check the voltage of battery or polarities. If it gets dim bit by bit, then
"LOW" indicator becomes red in using, this indicates battery is dead, please replace by
another new one.
3. Pushing "MUTE" switch to downside, audio will be cut down, noises are prohibited to come
across receiver. To use microphone, please push "MUTE" switch to upside.
4.Please confirm frequency of transmitter same as that of receiver before operation.
3
0
1.Pull out the antennas A and B, make sure a 90 angle between receiver and each antenna.
2.Insert one end of attached audio cable into "AF OUT" on rear panel, and the other end into "MIC IN" or "AUX IN" of
amplifier or mixer.
3.Connecting the power adaptor from DC 12V of receiver to a mains power socket.
4.Switching on receiver, the power indicator comes on.
5.Switching on microphone, the "RF" indicator on receiver comes on green. The "LEVEL" indicator will light up when
speak to microphone. Adjusting the volume by VOL-A and VOL-B control knobs.
4
Using the supplied screened jack-to-jack lead, connect from the MIXER jack socket to the
"MIC IN" / "LINE IN"socket on amplifier. Plug the mains power adaptor from "DC 12V" jack
to a suitable mains power socket.
Attention in installation
1.5m higher than ground
1.5m distance from wall
5
6
A.Overall system
Oscillation mode: Quartz controlled
Carrier Frequency Range: VHF 160~270MHz
Frequency Stability: 30ppm
Modulation Mode: FM
Max Deviation: 75KHz
Dynamic Range: >100dB
S/N >60dB
T.H.D: <0.5%
Frequency Response: 80Hz~20KHz at 3dB
Operating range: > 30M
Operating Temperature: -20~50
B. Receiver
Sensitivity: 6dB V at S/N>20dB
Image Rejection: >50dB
De-emphasis: 50 s
Audio output level: 1V p-p
Audio Output Impedance: 600ohms
Power supply: DC 12V/ 200mA
Power Dissipation: <800mW
C. Transmitter
Mike capsule: Dynamic microphone
Pre-emphasis: 50 s
Antenna: Built-in housing
RF output power: <10mW
Spurious emission: >40dB
Battery: one 9V battery
Power Dissipation: <250mW
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