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 Workstations, Digital
Program Length Manager $3,950.00
25-Seven  25S-PLM
25-Seven Warranty  |  25-Seven List Prices

Program Length Manager
Click to enlarge

Product Details

Radio. Every second counts. Program segments need to start and end exactly on time, with seamless transitions. Editing time is precious in the production room and in the field. If your piece is just a bit long or a bit short, will the pressures of getting it on air force compromising edits or inappropriate filler? Enter the 25-Seven Program Length Manager (PLM) to shrink or stretch your programs and program segments by several minutes per hour without pitch change, artifacts or glitches. Time-manipulated audio is clean enough to use on stereo music programs and live events. PLM is operator friendly and requires little training whether controlled from the front-panel or via web browser.

PLM is the next best thing to being able to stop the clock or add more minutes to the hour. Now, network headends that rely on prerecorded programming are free to focus on creative radio and let PLM assure continuity. That syndicated or brokered program and your local content don’t add up to the allotted slot? PLM can stretch the program to fit without the need for filler material or extra production steps. Need to insert some additional material without program interruption? Easily accomplished with PLM and not perceived by your listeners.

Product Specifications

Audio:S/N ≥ 84 dBA with 10 dB headroom (≥94 dB dynamic range); THD @1 kHz < .01%; IMD (IHF) < .01%; Frequency response ± 0.5 dB, 20 Hz – 20 kHz, measured analog input to analog output.

Power: 100-240 VAC, 50/60 Hz; typical consumption 32 VA.

Power Input

PLM comes with a standard IEC C14 power connector.


PLM connects to a standard 10/100Base-T network connection. This port is used for 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. PLM 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 PLM's internal sample rate. If PLM is not connected to a digital input, it uses its own high-reliability 44.1 kHz sample clock


Eight parallel control inputs and eight parallel control outputs appear on a DB-25 connector. Input and output functions are assigned through a configuration menu on the front panel. Inputs and outputs are opto-isolated for easy interface to other equipment. A +5v supply and ground are also brought out to the DB-25 for simple remote controls using pushbuttons and LED status readouts. The +5v supply can carry 200 mA, more than adequate for 8 LEDs and 8 logic inputs. It is protected by an internal, self-resetting thermal circuit breaker.

Product Dimensions

1RU (rack unit); 19" W (with rack ears) x 12" D x 1.75" H (483 x 305 x 44mm)

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