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The Nagra Seven

Two channel universal digital audio recorder


2 channels
24 bit, 192 kHz AD / DA Optional MPEG-1 layer II audio compression
Compact flash and 16 GB internal Micro SD memory Optional on-board graphic audio editor
USB 2.0 and Ethernet communication ports Optional SMPTE / EBU Time Code or I.S.D.N.
Colour touch-screen Lightweight and battery operated

Product description
The Nagra Seven has been designed as the successor to the Nagra LB, ARES-C and the ARES-BB+ recorders, as well as to fill a gap in the current market. It is designed to be a flexible device and can be adapted to a multitude of specific applications depending on the internal options installed. The base machine is a 2 channel 24-bit digital recorder offering sampling frequencies up to 192 kHz, and is equipped with AES 42 facilities for digital microphones. Identical in size to the LB, the Seven offers a selection of internal optional circuit cards to allow it to be adapted according to requirements. These hardware options consist of 3G and Wifi, SMPTE/EBU time code or ISDN communication possibilities. In addition there are software options for internal audio editing and audio compression (MPEG).

Audio inputs
The Seven offers two analogue audio inputs and a single stereo digital input. It will record in PCM linear audio at sampling frequencies up to 192 kHz or in MPEG-1 layer II compressed audio formats if the compression option is installed. The inputs are equipped with traditional Nagra microphone pre-amplifiers for dynamic and phantom +48V microphones and offer a range of switchable sensitivities to accomadate all common microphones. AES-42 microphones can also be used as the recorder can supply the necessary 10V dc supply voltage on the AES input, which is also equipped with a smple rate converter.

The analogue LINE input will accept up to +24dB allowing it to be connected to a standard audio mixer in the field.

The Nagra Seven has a state-of-the-art color touchscreen allowing greater flexibility in the display modes and screens, but also eliminating all switches which are the weakest link in modern electronics.
The audio levels, current operating mode and status of the recorder are shown on the touchscreen display mounted on the front of the unit. The screen is sunlight readable, and gives access to the entire menu structure of the recorder.
Various programmable "short cuts" are available giving many personalization possibilities.

The Nagra Seven is fitted with an internal 16GB micro SD flash memory. The main extractable media is an SD memory card which inserts into the slot on the left side of the recorder (see picture above). An external USB storage device may also be connected to the USB port using an adaptor interface cable.

USB 2.0 port
A micro-AB USB port allows the unit to be connected to a computer for file transfer. With an interface adaptor, the same port can also be used to connect an external device such as a USB memory stick or computer keyboard for data entry.

Editing and communication
If the optional editing option is installed, then graphic editing of the audio files is possible on the main display. Once the editing of the audio material is complete, files can be transmitted to the studio either over IP (through the ethernet connection using the File Transfer Protocol "FTP" connection) or via a GSM phone using 3G or by Wifi (if the option is installed). An optional I.S.D.N. board can replace the time code circuit for digital transmission over the I.S.D.N. network.

SMPTE / EBU Time code
The Nagra Seven has an optional internal time code board that works with all currently accepted frame rates including those for HD TV. It will handle both drop and non-drop frame rates, and will allow pull-up/down too.

Start / Stop
A 3.5mm miniature Jack socket is fitted for remote fader start/stop commands. This will allow the unit to be remotely controlled by a simple switch closure according to the current operational mode.

The Nagra Seven powered by a lithium-polxmer rechargeable battery pack, that will power the unit for about 8 hours. However, if transmission options such as WiFi or 3G are used the battery life will be reduced. Rechargable "AA" cells or even dry cells (in an emergency) can also be used in the supplied battery compatment.

Technical Specifications

Internal storage MIcro SD Flash memory card
Removable media SD Flash memorycard
Disk format FAT 16 / 32
Recording Method Linear digital PCM, optional:MPEG 1 layer II
File type 16 / 24 bit Broadcast Wave File BWF (WAV)
A/D & D/A conversion 24 Bit Sigma Delta
Bit rates 32 kbits/s up to 384 kbits/sec
Tracks 2 individual
Sampling Rate 44.1, 48 kHz, 88.2, 96, 176.4 and 192kHz
Recording capacity 1hr at 24 bit 48 kHz per GB of memory
Pre-recording buffer Programmable
Display Color LCD touchscreen
Level meters On color display

Digital input XLR 3-pole / AES 42
Analogue inputs
2 x XLR Microphone (Dynamic, +48V Phantom) / line
Microphone input sensitivity 2.8, 10 and 40 mV/Pa selectable
Mic input noise

Uin < 1µV (2.8 and 10 mV) @ 220?
Uin < 1.6µV (40 mV)

Limiters On microphone inputs
Line input sensitivity Adjustable from -6 dBm up to +24 dBm for 0 dBFS recording
THD at 1 kHz 2.8mV Mic <0.2%, 10mV Mic <0.1%, line <0.1% (measured on AES out)
Frequency response Mic, 10Hz - 75 kHz (+0 - 3dB), Line 10 Hz - 90 kHz (+0 -1dB) (measured on AES out)
Signal-to-noise ratio >110 dB ASA "A"
Input level adjustment range 45 dB Mic and from -6 to +24 dB Line
Input filters LFA
Internal microphone On the front panel
Crosstalk Mic >70dB : Line > 110dB

Analogue line output XLR 4.4V max (+15 dBm)
Crosstalk >110 dB
Signal-to-noise ratio >100 dB
Digital output XLR AES-3 (24 bit or 16 bit)
THD+N <0.004%
Frequency response

10 Hz - 75 kHz (+0-3dB)
Headphones Stereo 6.3mm (¼”) Jack 50 ?
Internal speaker 0.3W

USB Micro AB connector
M/S Decoder Switchable
Ethernet RJ 45

165 x 175 x 65mm (6½ x 7 x 2½") (W x D x H) (Incl. battery box)

Weight 800g (1.75 lbs) (Incl. battery pack)
Power supply External 15V
Power Consumption Approximately 5W
Charge time Approximately 3 hours (LIPO pack)
Battery life
>7 hours

Relative humidity From 10% to 99% (non condensing)
Referencia marca:7019180001
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