KEY FEATURES:
- Adjustable Line Length Compensation
- High Noise immunity
- IP66 Enclosure
- Digital Diagnostic
- Voice and Data Capable
- 12, 24 and 48VDC versions
VHF In-Line Amplifier with Adjustable LLC
DESCRIPTIONS:
The VHF Mini Line Amplifier VMLAD from Sigma is the industry standard VHF Amplifier for Leaky Feeder Systems. It has been used for many years by hundreds of customers world-wide. The VMLAD incorporates 2 separate amplifier, TX Down-link and RX Up-link. The VMLAD line amplifier also offers Drive-By Diagnostics, in the form of 12 High intensity LED’s, which indicate the condition of the amplifier.
Simply by walking or driving past the amplifier you can determine its condition by glancing at its VOLTAGE LED Meter, CURRENT drain LED Amp meter, Base Transmit RF power level LED meter and it’s Base Receive RF AGC LED.
The amplifier was specifically designed for the transmission of high speed data. The VMLAD utilises 6 Helical filters and has a 1 dB step variable LLC Line Length Compensation Attenuator at the input to accommodate different leaky feeder cable line lengths.
SPECIFICATIONS:
| Frequency: | Uplink 168 to 175 MHz, Downlink 152 to 158 MHz |
| Bandwidth: | Uplink 2.5 MHz, Downlink 2.5 MHz |
| Gain: | 22dB min |
| Connection: | Brass Screw Terminals |
| Impedance: | 75 Ohm standard, 50 Ohm option |
| Through Current Capacity: | 1.5 Amps |
| Operating Voltage: | 12, 24 or 48V versions |
| Current drain: | Less than 200mA at 12 VDC |
| Enclosure: | IP66 heavy duty enclosure c/w IP66 cable glands |
| Weight and dimensions: | 1 Kg, 190 x 75 x 57mm, excluding glands |
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