The ATW-1128 Handheld Microphone System consists of an ATW-R11 receiver and ATW-T28 handheld, unidirectional dynamic microphone/transmitter.
Features
True diversity reception and full FM deviation
Choice of 20 VHF frequencies
InvisibleLink¬ circuitry delivers optimum sound quality
Ground-lift switch and adjustable squelch control
Balanced and unbalanced audio output jacks
Receiver mounts in a single 19 in. rack space
Dual-power battery-save switches on transmitters
ATW-T28 handheld microphone/transmitter features a Hi-ENERGY¬ dynamic element with superior internal shock mounting.
Technical Info
System Includes: ATW-R11 Receiver and ATW-T28 Handheld Unidirectional Dynamic Microphone/Transmitter.
1100 Series Overall System
Operating Frequency: VHF high band, 169 MHz to 216 MHz
Frequency Stability ±0.005%, single-frequency crystal-controlled
Modulation Mode: FM
Maximum Deviation: ±30 kHz, traveling frequencies ±15 kHz
Operating Range: 200 ft. minimum
Operating Temperature Range: 40Á F (4Á C) to 110Á F (43Á C)
Frequency Response: 100 Hz to 15 kHz
ATW-R11 Receiver
Receiving System: Dual independent receivers, automatic-switching diversity reception
Image Rejection: >=60 dB
Signal-to-noise Ratio: 95 dB at 10 kHz deviation (IEC-weighted), maximum modulation 15 kHz
Total Harmonic Distortion: <=1% (10 kHz deviation at 1 kHz)
Sensitivity: 10 µV for 60 dB S/N (IEC-weighted)
Audio Output Unbalanced: 350 mV (at 1 kHz, ±10 kHz deviation, 10k ohm load)
Balanced: 220 mV (at 1 kHz, ±10 kHz deviation, 10k ohm load)
Output Connectors: Unbalanced: 1/4 in. phone jack Balanced: XLRM-type
Power Supply: 12-18V DC, 350 mA, with provided AC adapter
Dimensions (W x H x D): 16.93 x 1.92 x 7.28 in. (430.0 x 48.8 x 185.0 mm)
Net Weight: 5.5 lbs. (2.5 kg)
Accessories included: 2 whip antennas, rack-mount adapters, AD1205A AC adapter
ATW-T28 Handheld Transmitter
RF Power Output: 50 mW Max
Spurious Emissions: Under federal regulations
Dynamic Range: >=90 dB
Microphone: Element Dynamic unidirectional
Battery (not included): 9V (NEDA type 1604) alkaline
Current Consumption: 30 mA typical
Battery Life: Approximately 15 hours in High position, approximately 20 hours in Low position
Dimensions
Length: 9.50 in. (241.3 mm)
Diameter: 2.10 in. (53.3 mm)
Net Weight (without battery): 12.7 oz. (360 g)
Accessory included: Stand clamp
Because this item is used at your mouth or ear, it cannot be returned once opened due to health reasons. 
