Posts Categorised: Transmitter
L.A.W.N. operation made easier by new network control platform
STOW, OHIO — Alteros, an Audio-Technica company, has introduced two new handheld transmitters — the GTX24HHP live performer handheld and GTX24HHB broadcast handheld (shown) — along with remote and network control software platform that makes it easier to set up and operate the GTX Series L.A.W.N. (Local Area Wireless microphone Network) Ultra-Wideband (UWB) wireless microphone system.
WIRELESS MIC SYSTEM
A 6.5 GHz digital system, the GTX Series L.A.W.N. UWB system offers immunity to radio frequency spectrum regulatory changes, bandwidth loss and channel crowding, resulting in interference-free performance, even in the most demanding live broadcast settings, the company says.
The L.A.W.N. system enables operation outside the crowded UHF spectrum, free from database registration, licensing, complex support equipment, and even RF frequency coordination. It supports repeated deployment, from studio-to-studio and location-to-location, of 24 simultaneous, low latency (<3ms), 48 kHz/24-bit audio channels in any indoor or outdoor broadcast or performance environment, according to A-T.
HANDHELD MIC TRANSMITTERS
Available this summer, the GTX24HHP “performer” and GTX24HHB “broadcaster” microphone transmitters join a product line that includes the GTX3224 control unit, GTX24 bodypack transmitter, and GTX32 transceiver.
Intended for live performance, the GTX24HHP “performer” wireless handheld mic features a lightweight, ergonomic design that accepts popular thread-on microphone capsules using a 1.25-inch /28-thread pitch. This allows performers to select their preferred mic sound and performance from a wide range of manufacturers, including new Audio-Technica capsules.
The GTX24HHB “broadcaster” wireless handheld mic includes a dedicated “flag mount” section and incorporated “talkback button,” while incorporating interchangeable mic capsule mounts for maximum sound and performance flexibility.
According to Alteros President and CTO Jackie Green, “Modern facilities and systems are taking advantage of IP-based networking technology to reduce operational costs, simplify workflows, ensure … production quality, and even simplify equipment setup and operation.”
The Alteros R&D team worked closely with key professionals in the live, touring and broadcast markets to identify their desired workflows, interfaces and functionality.
The resulting Ethernet-based system allows easier setup, control, monitoring, naming, and network and clock management via a sophisticated user interface that can be accessed directly or remotely on multiple device platforms.
An excerpt from this week’s Monday Morning Coffee and Technical Notes
The following is from the Alabama Broadcasters Association’s weekly e-newsletter, Monday Morning Coffee and Technical Notes. Thanks to ABA’s Larry Wilkins. To subscribe to the newsletter, email firstname.lastname@example.org.
The FCC has announced that the license renewal schedule will begin next year. Station licenses are granted for a term of eight years after which all stations must file for a license renewal. Alabama and Georgia will need to file their renewal application by Dec. 1, 2019.
The reason for this early reminder is so that stations can have time to review and correct any issues with your Online Public File. All radio stations outside of the top 50 markets were required to place their public files on the FCC hosted website by March 1. If you have not done so we urged you to make sure you address this as soon as possible as this could affect your license renewal next year.
If you have any questions about the online filing contact the ABA office or your communications attorney.
C BAND REGISTRATION
For the last several weeks we have been reminding broadcasters about the importance of registering all C band satellite downlinks.
The FCC has begun to look at the possibility of allowing mobile broadband operations in the 3.7–4.2 GHz frequency band, known as the C Band. This is the satellite downlink band used by all major networks and programmers.
If this takes place radio and television stations could lose their satellite signals due to interference from the mobile broadband operations. The FCC needs to understand how important the C band is to all broadcasters.
The NAB, SBE and state broadcast associations are urging stations that presently have C band satellite dishes to register them with the FCC. As NAB points out
normally applications for earth station licenses, or registration in the 3.7–4.2 GHz band, would require a frequency coordination report demonstrating coordination with terrestrial stations, however the Commission has waived the frequency coordination requirement for the applications for a 90-day period ending on July 18.
Applications must be filed electronically through IBFS at http://licensing.fcc.gov/myibfs . You will need the station FRN number and password to log into the site. Once logged in select and complete Form 312 Schedule B, remit the statutory application filing fee, and provide any additional information required by applicable rules. The filing fee is $435.
Listed here are detailed instructions, provided by space providers SES and Linkup Satellite, that you can follow to complete registration.
AIR FILTERS AT TRANSMITTERS
As summer gets started, engineers are reminded to keep a close watch on the air filters in the transmitter and air handling equipment. Overheating is major cause of equipment failure, so clean or replace air filters as often as necessary to maintain sufficient flow of air.
If your site has a central A/C unit or wall pack, have your local A/C service center conduct a thorough inspection on the units. A little preventive maintenance now could save the station money and lost air time.
Epoch may sound like the latest in the flu virus, but it is how the time synchronization counters in digital audio and video are linked together.
Epoch means the beginning of a distinctive period in the history of someone or something. Unix epoch time is the number of seconds that have elapsed since Jan. 1, 1970 (midnight UTC/GMT). Highly accurate counters are used in the creation and synchronization of among other things analog to digital convertors.
Epoch is the “start point” in time that defines the “zero” count. Time is then measured from the Epoch to the present using a precise frequency of any unit desired.
The total number of GatesAir transmitters deployed in that country stands at 1218
MASON, Ohio — GatesAir is getting ready to send its final shipments of transmitters to Norway, bringing the total of its transmitters deployed in that country to 1218 in support of Norway’s transition to DAB.
Norway’s national FM Radio signals vacated the airwaves in mid-December, concluding an 11-month sunset. Many local FM stations remain on the air.
GatesAir says it has been involved in Norway’s DAB digital radio activity since the nation’s first tests in 1994. Upon the Norwegian government’s 2011 approval to switch off FM radio, it says it helped the country to accelerate the site planning and systems design process, and worked closely with partners to set a site-by-site delivery schedule.
According to the company, a pair of redundant GatesAir Maxiva VAX air-cooled transmitters ranging from 50 W to 5 kW support over-the-air content delivery from most sites. The final transmitters being shipped include low-power models.
“Our work in Norway has spanned over two decades to ensure that the exacting specifications of the network and delivery timelines were met in accordance with the Norwegian government’s mandate,” said Darren Frearson, vice president of Sales, EMEA-APAC, GatesAir.
“GatesAir’s modular transmitters were easily configured and rapidly deployed across the network. The compact footprint and small weight contributed to the rapid deployment, which reached as many as 14 sites per week.”
Take a look inside an iconic transmitter
If you’ve ever been curious about the set up of a Bauer 707 transmitter, here’s a chance to peek inside with a series of still images, accompanied by a stirring sound track.
Video creator and ham radio operator Philip Neidlinger writes, “I commenced the ultimate mad science project to end all projects approximately mid-February 2017. The Bauer 707 is now on the air and sounding great. The current transmitter output is 250 W carrier into an inverted vee at 50′ (apex).”
Also, be sure to keep an eye out for an unexpected cameo from one of cinema’s most famous movie villains.
Eventually, VRCMCT visitors will be able to see the transmitter on the air and possibly use it, ARRL News reports
WINDSOR, Conn. — It’s obvious to many readers of Radio today that a large fraction (sometime it seems like all) of the broadcast engineers out there are also hams — and many have blurred the lines between vocation and avocation by restoring old AM transmitters for ham use.
Now even the ARRL is getting in to the game, thanks to a joint effort with the Vintage Radio and Communications Museum of Connecticut . They’ve taken a classic Gates BC-1T AM broadcast transmitter and given it a second life on the ham bands for occasional use under W1AW or under the ARRL Headquarters Operators Club call sign, W1INF, according to the ARRL news . The transmitter will be located in the ARRL Lab.
Led by broadcast engineer Dan Thomas, NC1J, VRCMCT volunteers restored the1 KW transmitter to operating condition after obtaining it from the National Capital Radio and Television Museum in Bowie, Md. The VRCMCT will retain ownership of the transmitter, while the League houses and maintains it on loan.
“While a shift from the higher end of the Standard Broadcast Band to 160 meters alone might seem rudimentary, various stipulations added a level of complexity,” according to the same article. “First, the transmitter had to be modified as little as possible, retaining original components. That ruled out completely redesigning the circuitry. The 833 final amplifier tubes, better suited for broadcast-band use, would be retained as would the inductance-heavy tuning circuits.”
Another requirement called for the transmitter to function on 75 as well as on 160 meters. ARRL turned to AM guru and veteran broadcast engineer Tim “Timtron” Smith, WA1HLR, of Skowhegan, Maine, to handle shifting the BC-1T from 1340 kHz to the ham bands.
“Timtron not only has been an AM mainstay on 75 and 40 meters over the years, he’s engineered all manner of AM, FM, and HF broadcast transmitters in his extensive career. This combination of familiarity and experience made him a logical choice to handle the conversion to amateur use of the Gates BC-1T.” This particular transmitter lived its first life transmitting country music from KPGE in Page, Arizona.
The modified transmitter was tested at the 250 W level on Feb. 22 and the modifications were found to be successful. Eventually, visitors to ARRL headquarters will be able to see the transmitter on the air and possibly use it, by advance request.
Do you have an AM transmitter restoration project you’d like to tell us about? If so, drop a message about it to email@example.com.
Company says the move is a “responsible step” and will now “focus on supporting existing customers’ transmitters with our available components”
MASON, Ohio — GatesAir is suspending the sale of new AM transmitters.
Chief Product Officer Rich Redmond said: “Recent changes in the long-term availability of critical components from our suppliers, including several last-time buy notices, have caused us to take proactive steps to ensure we can meet our continued support obligation of our AM products,” he said.
“To safeguard our ability to offer an ample supply of spare components — and to secure the ongoing field support of our AM transmitters — GatesAir has taken the responsible step of suspending new AM transmitter sales, and will instead focus on supporting existing customers’ transmitters with our available components.”
[Related: “GatesAir Adds to Intraplex IP Codec Family “]
He said warranty, field service, phone support, spare parts and repairs continue as normal for GatesAir AM products.
Flexiva AX, DX and 3DX transmitters all had a number of obsolete components that influenced the decision.
“GatesAir is currently in the advanced technology assessment phase for the development of an updated line of AM transmitters,” Redmond said.
The news has no impact on the FM line, anchored by its Flexiva FAX or FLX transmitter. For DAB Radio, GatesAir recently launched the Maxiva VAXTE platform and will be showing new power levels at the NAB Show, Redmond said.
Read the full story at RadioWorld.com .
Carrier Sleuth, from small software developer Black Cat Systems, is designed to aid serious hams digging out overpowered medium-wave signals.
The system incorporates five Nautel NX400 transmitters along with a large combiner
AMMA-2 gets new 5 kHz and 8 k Hz low-pass filters
Intraplex IP Link MPXp codec with integrated Intraplex SynchroCast simulcast and time-locks signals