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Transmission Transmission

Accesories / Broadcast Tools



From: Telos

-Saving Time, Managing Time
-Keeping HD Radio in Sync with Analog
-Take Precision Delay Out to the Ballgame

For nearly a decade, 25-Seven® Systems has been helping you solve your station’s time management problems. Now we’ve got something for your toughest challenges. Precision Delay, our fourth specialized product, addresses applications such as drift between analog and HD Radio transmission signals and broadcast repeater synchronization.

Precision Delay offers sample-accurate delay times adjustable in fractions of a second; seamless watermark-protecting builds and exits; synchronized data streams; network accessible control; and 25-Seven quality and support.

With more and more vehicles equipped with HD Radio receivers, stations can’t afford confusing listener experiences due to blending out-of-sync analog and HD Radio signals.

Precision Delay lets you precisely set offset measurements by querying and retrieving them over IP from your BELAR FMHD1 or AUDEMAT Golden Eagle modulation monitor.

When sports fans listen to radio play-by-play at the stadium, they may not know if they are in the right ballpark when HD Radio diversity delay is running. Getting your station into “ball-game mode” means switching the HD Radio signal on and off without annoying listeners or impacting ratings. Precision Delay lets you smoothly build in and out of delay.

Protecting the integrity of ratings watermark codes during delay builds and exits presents special challenges. Precision Delay’s unique Watermark Safe Mode helps accommodate the time-based structure of watermark encoding. Our algorithms never alter pitch, so unlike other time manipulation processes, they never undermine the critical frequencies upon which watermarking depends.


-Power Input:
Precision Delay comes with a standard IEC C14 power connector.

Precision Delay connects to a standard 100BASE-T network connection. This port is used for Axia® Livewire, synchronization to a network time server, and secure remote control via a web browser. If connected to the Internet, it should be behind a hardware firewall.


-Analog Inputs and Outputs:
Stereo inputs are electronically balanced XLR females, pin 2 hot, with a load of 20kΩ: this makes it compatible with all modern electronically-balanced outputs. If fed from a transformer-balanced output, we recommend bridging a 680Ω resistor between pins 2 and 3. Outputs are electronically balanced XLR males, pin 2 hot, designed to feed a load of 600Ω or greater. Input and output sensitivity default levels can be set from the front panel, and can range between +20dBu and -10dBu.


-Digital Inputs and Outputs:
When set to AES/EBU via the configuration menu, this input conforms to IEC 958 Professional (5v
p-p, 110Ω balanced) on XLR connectors. When set to s/pdif, the voltage and impedance switches to IEC 958 Consumer (.5v p-p, 75Ω unbalanced): connect signal to pin 2 and shield to pins 1 and 3. Digital output (selectable AES or s/pdif) is always active, regardless of whether you are using analog or digital inputs. PD will lock to any valid 32 kHz, 44.1 kHz, or 48 kHz signal at the digital input connector, even if you have selected analog for the input. In that case, the digital input controls Precision Delay s internal sample rate. If Precision Delay is not connected to a digital input, it uses its own high-reliability 44.1 kHz sample clock.

-Axia Livewire Inputs and Outputs:
Precision Delay supports Livewire, with audio connections exclusively via the network. Precision Delay also supports Livewire-based GPIO.