{"product_id":"sonifex-rb-sd1-silence-detection-unit","title":"Sonifex RB-SD1 | Silence Detection Unit","description":"\u003cp\u003eThe RB-SD1 silence detection unit is a 1U rack-mount device used to monitor an unattended stereo studio feed and in the event of the signal going “quiet” after a given period the unit will switch through an alternative stereo audio signal. This signal could be a recorded message (e.g. “normal service will be resumed”, etc), a feed from a CD player or minidisc machine, or an alternative recorded programme. Controls are provided to start external equipment and to provide remote status indication. It has 2 balanced stereo audio inputs with the maximum input level being +28dBu. Each input is user-defined as either the main source or auxiliary source and both sources are monitored for failure, each having a remote failure alarm. In the event of the main source dropping below a pre-set level for a pre-determined amount of time, the unit will automatically switch through to the auxiliary signal. The silence detect level is adjustable between -60dBu and -15dBu in 3dB steps via a 16 position rotary switch on the rear panel. The silence interval can be adjusted between 2 seconds to 30 seconds in 2 second steps, or, alternatively, set to 2 minutes 5 seconds also via a 16 position rotary switch on the rear panel. The audio outputs use stereo professional balanced XLR-3 male connectors. The unit can operate in 2 modes – automatic or manual. In both modes it will automatically switch over to the auxiliary source on detecting silence. When the main signal is again detected it will either return to the main signal automatically or manually depending on the mode chosen. The RB-SD1 has a number of remote operational features. Remote outputs provide separate relay contact closures for failure of the main and auxiliary inputs. You can also control remotely all of the front panel switches for source selection, mode selection and signal Restore. You can remotely start and stop another piece of equipment on alarm failure and main signal Restore respectively. Also, the longest silence time (2min 5sec) can be set remotely, which is useful if you are expecting to broadcast a long silence. The unit can be configured to alarm when either the left or right channel of the main input source fails, or if the whole stereo signal fails. There are also options to set the remote start output as momentary or latched, to disable switching to the auxiliary input on alarming and to increase the gain on the auxiliary input so that an unbalanced input can be used, for example, from a domestic minidisc player. Front panel LED indicators show individually left and right programme and alarm conditions for both the main and auxiliary inputs. The status of the source, mode and alarm state are also shown on the front panel with LED indicators. Additionally, the RB-SD1 can be programmed for specific applications which can be defined on power-up of the unit. Contact Sonifex for further information if you have a particular requirement. (Refer to the handbook on the website for information on current configurations). The RB-SD1 has been designed to have a passive signal path through the main input, so if power to the unit fails, the signal input will still be routed through to the output. This is essential for applications such as installation at transmitter sites, where a power failure to the unit should not prevent the audio input signal from being output to the transmitter. Balanced stereo analogue main and aux inputs.\u003c\/p\u003e\u003ch3\u003eProduct Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBalanced stereo analogue main and aux inputs.\u003c\/li\u003e\n\u003cli\u003eBalanced stereo analogue outputs.\u003c\/li\u003e\n\u003cli\u003eAutomatic or manual switch to or from the auxiliary source.\u003c\/li\u003e\n\u003cli\u003eAdjustable silence detect threshold level and silence duration.\u003c\/li\u003e\n\u003cli\u003eRemote I\/O for alarms and unit functions.\u003c\/li\u003e\n\u003cli\u003ePassive signal path.\u003c\/li\u003e\n\u003cli\u003eFront panel LED indications of alarm status.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cp\u003eAt a radio transmitter site, before the input to the transmitter. A local audio source will become the secondary input in case silence is detected from the studio source. At a radio studio in case of failure of broadcast playout server, it can switch in an emergency playback system.\u003c\/p\u003e\u003ch3\u003eProduct Category\u003c\/h3\u003e\u003cp\u003eSilence Detectors\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ch4\u003eAudio Specification\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Input Level:\u003c\/strong\u003e +28dBu\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Output Level:\u003c\/strong\u003e +28dBu\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz - 20kHz ±0.1dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e +8dB (for unbal input B - optional)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistortion:\u003c\/strong\u003e As input for balanced input, \u0026lt;0.05% ref +8dBu output for unbalanced input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e \u0026gt;100kΩ balanced\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e As input, except when using unbalanced auxiliary input where output impedance \u0026lt;50Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise:\u003c\/strong\u003e \u0026lt;-87dB, unity gain, ref +8dBu output for unbal input\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eRear Panel Connections and Controls\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs (Main \u0026amp; Auxiliary):\u003c\/strong\u003e 4 x XLR 3 pin female (balanced, auxiliary can be unbalanced)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e 2 x XLR 3 pin male (balanced)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemotes:\u003c\/strong\u003e 15 way D-type plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm Threshold:\u003c\/strong\u003e -15dBu to -60dBu in 3dB steps via rotary switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilence Detect Duration:\u003c\/strong\u003e 2 - 30 seconds in 2 second intervals \u0026amp; 125 second option via rotary switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetection Type:\u003c\/strong\u003e Mono or stereo, via DIP switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilence Switch Defeat:\u003c\/strong\u003e Disable\/enable silence switching, via DIP switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote Start:\u003c\/strong\u003e Latched or momentary, via DIP switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMains Input:\u003c\/strong\u003e Filtered IEC, switchable 110-120V, or 220-240V, fused, 9W max\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Rating:\u003c\/strong\u003e Anti-surge fuse 100mA 20 x 5mm (230VAC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Rating:\u003c\/strong\u003e Anti-surge fuse 250mA 20 x 5mm(115VAC)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFront Panel Controls and Indicators\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls (with indicators):\u003c\/strong\u003e Source select, mode select and restore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicator:\u003c\/strong\u003e Program and alarm indicators for left and right source for both main and auxiliary channels\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eEquipment Type\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eRB-SD1:\u003c\/strong\u003e Silence detection unit\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003ePhysical Specification\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Raw):\u003c\/strong\u003e 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Raw):\u003c\/strong\u003e 19” (W) x 4.3” (D) x 1.7” (H) (1U)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Boxed):\u003c\/strong\u003e 58.5cm (W) x 22.5cm (D) x 7cm (H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Boxed):\u003c\/strong\u003e 23” (W) x 8.9” (D) x 2.8” (H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Nett: 1.4kg Gross: 2.0kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Nett: 3.1lbs Gross: 4.4lbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSupport and Downloads\u003c\/h3\u003e\u003ch4\u003eHandbooks \u0026amp; Guides\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/ad56550c.delivery.rocketcdn.me\/wp-content\/uploads\/products\/RB-SD1\/redbox-02_hb.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRB-SD1 Handbook\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eBrochures\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/brochures-guides\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick to visit the brochures page.\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eDeclarations\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/support\/ce-ukca-declarations\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick to visit the declarations page.\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eRelated Products\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/rb-dsd1\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRB-DSD1 Digital Silence Detection Unit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/rb-dsd8\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRB-DSD8 8 Channel Silence Switcher\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/rb-sd1ip\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eRB-SD1IP Silence Detection Unit With Ethernet \u0026amp; USB\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOfficial Links\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/rb-sd1\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOfficial Product Page\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"Sonifex","offers":[{"title":"Default Title","offer_id":53670172459349,"sku":"RB-SD1","price":815.07,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/6993\/3141\/files\/Sonifex_Sonifex_RB_SD1_Silence_Detection_Unit_01_6897e4de-0f0b-4b63-b117-def2205de395.jpg?v=1780663032","url":"https:\/\/tvpro.lt\/products\/sonifex-rb-sd1-silence-detection-unit","provider":"tvpro.lt – Broadcast \u0026 Pro Video Equipment Online Store","version":"1.0","type":"link"}