3G Twin Base Station (LDK 4420)

Dual triax/fiber camera transmission system

The Grass Valley™ LDK 4420 3G Twin Base Station is a heavy duty, high-quality, multi-standard transmission system with new and specially developed highly advanced technologies that is fully 3G and 3D-ready. It supports current 1080i50/60 and 720p50/60 formats as well as future 1080p50/60 transmission from the LDK 8000 Elite WorldCam.

The LDK 4420 3G Twin Base Station system combines a triax module and a single mode (dark) fiber (SC or ST) module in a single base station. This makes the LDK 4420 the base station of choice for every truck or studio environment.

For production cameras that are equipped with Grass Valley 3G Triax, "traditional" triax cable can be plugged into the 3G Twin Base Station to cover up to 1,500 meters (4,921 ft). For longer cable runs (e.g., 5 km/3.1 miles), single mode (dark) fiber cables can be plugged into the same 3G Twin Base Station, which in turn plugs into the LDK 4426 3G Camera to 3G Fiber converter to output full Grass Valley 3G Triax to the camera. The LDK 4426 converter box can be placed close to the camera, or up to 1,500m (4,921 ft.) away.

When Grass Valley 3G Fiber cameras are used, the single mode (dark) fiber cables plug into the 3G Twin Base Station and are connected to the LDK 4425 3G Fiber Power Converter. This will deliver full SMPTE hybrid fiber to the camera, keeping full functionality including diagnostics.

With a compact design of only 2 RU and weighing only 2.3 kg (5.1 lbs.), the LDK 4420 3G Twin Base Station takes up minimal rack space. When combined with its low power consumption and efficient internal cooling (that eliminates the need for space between adjacent units), the LDK 4400 Base Station is ideal for implementation in OB vans.

Key Features

Member of the versatile Grass Valley 3G Transmission family
Maximum flexibility with both triax and single mode (dark) fiber connectivity
Range of transmission conversion boxes to meet every need
Full feature set for both today's and tomorrow's broadcast requirements
Full support for all HD formats 720p/1080i/1080p
6X 3G video outputs / 8X 1.5G video outputs
Extensive (analog/digital) audio connectivity
Embedded audio
Three selectable return inputs (3G, HD, or SD)
Universal 3G power supply
Long triax cable capabilities (1,500m/4,921 ft.)
Compact (2 RU) and robust base station

Specifications

Video
720p: 23.98/25/29.97/50/59.94 Hz
1080p (WorldCam): 23.98/24/25/29.97/50/59.94 Hz
1080i: 50/59.94 Hz
S/N ratio in Y signal: 61 dB typical
Modulation depth: 55% at 27 MHz typical

General
Dimensions (HxWxL, approx.): 438 (19" rack) x 88 (2 RU) x 510 mm
Operating temperature: 0 to +45° C (+32 to +113° F)
Storage temperature: -40 to +70° C (-40 to +158° F)
Operation humidity: Max. 90% (non-condensing)
Weight: 13.0 kg (28.66 lbs.) full option equipped
Power consumption: 380 VA or 375 watt max. in studio configuration; 200 VA or 180 watt max. in portable configuration
Typical triax (14 mm) cable length: 1,500m (4,921 ft.)
Typical SMPTE hybrid fiber (SMPTE 311) cable length: 3,000m (9,842 ft.) - in combination with 3G Twin Power converter LDK 4429

Connectors
Teleprompter in: BNC 1X (loop-through output), (C)VBS, 1.0 Vp-p, 75Ω
Reference in: 1X (loop-through output), 1.0 Vp-p, 75Ω HD tri-level sync or SD black-burst
HD-SDI out:

BNC 6X 0.8 Vp-p, 75Ω, SMPTE 292M, 1080i/720p at 59.94/50 Hz
BNC 6X 0.8 Vp-p, 75Ω, SMPTE 425M-A/SMPTE 425M-B, 1080p at 59.94/50 Hz

HD-SDI out (live/effect): BNC 2X 0.8 Vp-p, 75Ω, SMPTE 292M, 1080i/720p at 59.94/50 Hz
HD monitoring out: BNC 1X 0.8 Vp-p, 75Ω, SMPTE 292M, 1080i/720p at 59.94/50 Hz
Composite video out: BNC 1X 1.0 Vp-p, 75Ω (CVBS text w/ or w/o video, for viewing purposes)
Signaling in/out: D-sub 15-pin, male; preview, green tally (call), dry contact; yellow tally (iso), dry contact; red tally (on-air), dry contact; remote audio level control (22-64 dB), DC
Auxiliary in/out: D-sub 9-pin, female; An0, 0-5 VDC in, An1, 0-5 VDC in, output on camera head; 16:9 <0.8 VDC in; private data in/out; 100 kb TTL (RS-232)
Control data: RJ-45 connector for Ethernet C2IP
Power requirement: AC 115V/230V ±15%, 47 to 63 Hz
Power connector: IEC type, 3-pin male
Power consumption: 380VA or 375 watt max. in studio configuration; 200 VA or 180 watt max. in portable configuration

3G Transmission Module
Triax connections: Fischer, ARD, Lemo-4E, Lemo-3T, BBC-Lemo, Trilock
Fiber connections: SMPTE(Lemo), SC, ST
External video in:

HD-SDI or SD-SDI in 1, (loop-through output), 0.8 Vp-p, 75Ω
HD-SDI or SD-SDI in 2, 0.8 Vp-p, 75Ω
HD-SDI or SD-SDI in 3, 0.8 Vp-p, 75Ω

2-channel audio: Audio out, XLR-3 2X; 0/+6 dBu (±1.5 dB, max. 18 dBu, 600Ω, gain max. 70 dB)
Frequency response: 40 Hz to 15 kHz, (+1/-3 dB, 1 kHz, -10 dBu output level)
Distortion: Less then 0.5% (100 Hz/1 kHz, +6 dBu out, 600Ω)
S/N ratio: 58 dB (unweighted RMS)
AES/EBU 1+2: BNC 75Ω, digital audio output audio 1 and 2
AES/EBU 3+4: BNC 75Ω, Dig audio output audio 3 and 4
Intercom in/out (2/4-wire intercom): D-sub 15-pin, female (program in, production in/out, engineering in/out), in: 0 or 6 dBu; out: 0 or 6 dBu (±2 dB, max. 12 dBu)
Frequency response: 150 Hz to 6 kHz (1 kHz, -10 dBu output level)
Distortion: Less than 2% (1 kHz, +12 dBu level)

Data Sheet