Invotone WM-210 User manual

User Manual
VHF Wireless Microphone System
WM-210
WM- 210
WM-210
WM-210

Introduction
WM-210 VHF wireless microphone is especially designed for motional
sound source recording and life performances. It features:
* Best sound performance.
* Effective feedback control circuitry.
* Low power consumption.
* Independent and mixed output.
* Skid resistant spring steel mesh grille to avoid rolling when laid flat.
Operation
Transmitters (Handheld Microphones)
ON
OFF
1
1
ON
OFF
1. The batteries should be placed according to the right polarity.
2. When the “ON/OFF” switch is set at “ON”, the power indicator
will light. If the indicator is not illuminated, the battery voltage and
polarity should be checked.
-1- -6-
Specification
Frequency Range: 174-216MHz
Number of Channels: 2 channels
Frequency Response: 100Hz – 16kHz
Max.Frequency Deviation: 15kHz
Frequency Steadiness: ±5kHz
Receiving Sensitivity: -80dBm
S/N Ratio: ＞40dB
Total Harmonic Distortion: ＜1% (at 1kHz)
Transmit Power: ＜10mW
Operating Range: 50m outdoors
Receiver Power Supply: DC 12V/300mA, External
Transmitter Power Supply: 9V Tier Battery
Output Type: Separate or Mixed Output
Delivery Includes
Receiver 1pc
Handheld Microphones 2pcs
Audio Output Cable 2pcs
Power Adaptor 1pc
Manual 1pc
9V Batteries 2pcs

Transducer Principle of the Transmitters
3. Status Indicator ①：When it lights green, the transmitter works
regularly; When it lights red, the transmitter is in low transmit power.
4. When the “ON/OFF” switch is set the in middle position, the
handheld microphone is mute.
5. If the microphone is not used for a long time, please take out the
batteries.
Frequency
Modulation
Circuit
ALC Audio
Amplifier
Quartz
Crystal
Circuit
Dynamic Compression
Noise Elimination Circuit
High Frequency
Power Amplifier
Circuit
-2-
Pre-emphasis
Network
Regulated
Power Circuit
1. The On/Off switch of the microphone is set
to middle position and the microphone is
muted.
2. The volume control on receiver is set at
minimum.
1. The antennas are not pulled out properly.
2. The battery power are low.
3. The receiver is put at dead-point or next to
electromagnetic field.
1. The battery power is low.
2. Other equipment is operating on the same
radio frequency or higher frequency.
The power adaptor is not well
connected.
Causes
-5-
Indicator “RF” lights but no sound
when speaking
The indicator doesn’t light when
receiver power switch is turned on.
The operating range is short and the
signal is unstable.
Trouble Shooting
Troubles
Distortion or noise

-4-
Transducer Principle of Receiver
Quartz
Crystal Circuit
Audio
Amplifier
Circuit
Super
Heterodyne
Circuit
High Frequency
Selection Amplifier
Circuit
High Frequency
Narrow-band
Filter Circuit
Antennas
External Power
De-emphasis
network
Dynamic
Extension
Circuit
Audio Output
Automatic
Selection Circuit
Audio Output
Indicator
Squelch
Testing
Circuit
High Pass
Filter Circuit
Squelch
Circuit
Regulated
Power Circuit
The other circuitry
stays the same
Caution
1. Receiver should be positioned at least 1m away from the ground
or the wall.
2. Avoid placing the receiver at dead-points to ensure the good
signal receiver status.
3. Avoid throwing the microphones.
4. Avoid exposing it directly to sun and rain. Keep it away from
electromagnetic field.
5. Non-special technician is not allowed to disassemble or repair the
product. Please contact the local agent if there is any question or
service requirement.
6. Specifications are subject to change without prior notice.
-3-
Receiver
1. Turn on the power switch and the indicator lights.
2. Pull out the two antennas A & B and mount them perpendicular on
the receiver.
3. Audio output connection: if mixed output is needed, please connect
1pc audio output cable with either the audio output socket; if separate
output is needed, connect both of the audio cable output cables
with two audio output sockets.
4. When the transmitter (handheld microphone) is on, the “RF”
indicator on receiver will light. The output volume can be adjusted
on the front panel of the receiver.
5. Adjustable Sensitivity Switch ①: When it is set at 0dB, the receiver
has regular sensitivity; when it is set at -10dB, the receiver’s
sensitivity is attenuated. (Higher sensitivity provides longer
operating distance, but it is easily to be interfered with; lower
sensitivity provides shorter operating range, but ensures better
anti-interference.)
6. If the receiver is not used for a long time, please disconnect the
power adaptor.
POW ERPOW ER VO LUM EVOL UME V OLU MEVO LUM E
CHA NNEL BCHA NNEL BCHA NNEL ACHA NNEL A
HIG H VHF DUA L CH ANN EL
WIR ELESS M ICROP HO NEWIR ELESS M ICROP HO NE
ONON
OFFOFF
55
00 1010
55
00 1010
0 -10
ANT.B OU T B OUT A
0-400mv
Mix out only cabl
CAUTION !
RISK OF ELECRONIC SHOCK
DO NOT OPEN
DC 12 V
ANT.A
①
WM-210
Frequency:174MHz-216MHz
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