The Lectrosonics UHF Filter/Amplifier Module (Block 21-22) provides a unique, high performance solution for antenna systems requiring long cable runs or distribution to multiple receivers or locations. The unit can be used to apply RF gain at the antenna ahead of a long run of coaxial cable to compensate for signal loss through the cable. A compact, high performance multicoupler can also be configured using the UFM50 ahead of an RF splitter to offset the loss through the splitter.

The UFM50 design places RF filtering before gain to minimize intermodulation (IM) products and prevent overload. Two transmission line ceramic resonators at the input provide filtering with a 50 MHz bandwidth. Following the filters, 12dB of gain is applied with a high quality GasFET RF amplifier with an excellent +41dBm IP3. The result is outstanding RF performance without IM or overload problems.

A switching regulator is used in the power supply to control current consumption over an input voltage range of 8-16 volts. The regulator maintains low current consumption and low heat dissipation which is especially useful in portable audio mixing common in field production and ENG.

The UFM50 can be powered from external DC or via phantom power through a coaxial cable connected to a multicoupler. The housing is constructed of cast aluminum with a brushed aluminum cover plate. Two rugged BNC connectors and a threaded, locking power jack provide secure connections for rugged field conditions and for long-term installations.

RF filtering before gain

50 MHz passband on center frequencies from 560 to 865 MHz

Ceramic resonator filters

GasFET RF amplifier

+41dBm 3rd order intercept

Switching regulator for 8-16V power at constant power dissipation to minimize heat at high voltage

Jumperable attenuators for +5dB, +8dB and +12dB total gain

Cast aluminum housing

External power or phantom power at output jack from UMC16A multicoupler

Related Questions and Answers

Q: 1. hi is this the new r400a or the old version? the picture is the old one but they discontinued that and called the new one the same model # (it's blue with the rounded front plate)

A: Yes, the Lectrosonics R400A UHF Diversity Receiver is the most recent version. Thank you for pointing out that we still have the photo of the older version. I will have our web team update the images to show the R400A Receiver with its current design.

Q: 2. What kind of mounting holes does it have?

A: This item has holes intended for wall mounting.

Q: 3. Whats the vertical length one can move it up or down for vertical adjustment?

A: I believe it's about an inch or so.

Q: 4. how many receivers can I use with one transmitter?

A: There is no limit to the amount of receivers usable with The Lectrosonics IFBT4 transmitter.

Q: 5. what is the smqv connector? is TA3M? or TA5M?

A: The connector is a TA5.

Q: 6. Can I power these from the Sound Devices SL-6?

A: First make sure you are using the UFM230L for the right reason. Why do you need it?If you really do need it, then here's the answer:From the SL-6 manual:Antenna Bias PowerIf needed, 12V bias power may be provided to each antenna.To supply bias power to an antenna:1. Press the MENU button to access the Main menu.2. Do one of the following:X Turn and press the Headphone encoder to select SL-6 Antenna A Power.X Turn and press the Headphone encoder to select SL-6 Antenna B Power.3. Turn and press the Headphone encoder to turn bias power on or off.

Q: 7. I want to use this antenna for the VR Field, but do I need to choose all my transmitters to the same Block as this antenna for it to work?

A: This antenna is designed for devices operation in Block 22 only.

Q: 8. what is the matching reciever?

A: The Lectrosonics SMQV Super Miniature Wireless Microphone Transmitter is compatible with any Lectrosonics Digital Hybrid receiver in the correct frequency block, such as BH #LEUCR411A21.

Q: 9. Which filters are in this pack?

A: Hi,2 reds, yellow, orange, green, blue and then 4 varying degrees of frosted gels.I hope this helps.Regards,Will H

Q: 10. Are any of the holes threaded?

A: No, the Quasar Science Q-Block with Fastening Bolts holes are not threaded.