| 经销商 | 联系方式 |
|---|---|
| 爱思创Extron电子 | 4000.398766、 021-3760 1568 |
Extron MLS 304MA 和 MLS 304SA MediaLink 切换器是带有集成音频放大器的 4 路输入、多格式有源切换器。两种型号都提供了复合视频、计算机视频和音 频切换，是适用于单投影机教室和会议室的经济型解决方案。每款切换器都 包括两路线路电平音频输出（1 路固定，1 路可变），可以通过 RS-232 配置为 用于单声道或立体声输出。
| 随附附件 | ||
|---|---|---|
| MBD 149 | 1U, Full Rack Width, Rack Mount and Through-Desk Kit for Four-Piece Enclosure | 70-077-03 |
| 可选附件 | ||
|---|---|---|
| MLC 226 IP | 带 IP Link® 以太网控制的增强型 MediaLink® 控制器 | |
| RCAF-BNCM | RCA Female to BNC Male Adapter | |
| MLM-WB+ | 带向下翻转 4U 机架空间的可锁定金属墙盒 | |
| VGA-A M-M MD | 插头对插头 VGA 和音频电缆 - 压铸连接器 | |
| SYM BNCM | 15 针 HD 插头对 BNC 插头微型高分辨率电缆 | |
| SYM BNCF | 15 针 HD 插头对 BNC 插座微型高分辨率电缆 | |
Extron MLS 304MA 和 MLS 304SA MediaLink 切换器是带有集成音频放大器的 4 路输入、多格式有源切换器。两种型号都提供了复合视频、计算机视频和音 频切换，是适用于单投影机教室和会议室的经济型解决方案。每款切换器都 包括两路线路电平音频输出（1 路固定，1 路可变），可以通过 RS-232 配置为 用于单声道或立体声输出。
特性
280 MHz (-3 dB) RGB 视频带宽
可通过 MediaLink 控制器、前面板按键或 RS-232 进行控制
本地监视器输出
可通过 RS-232 执行音频输入增益和衰减
固定和可变的预放大线路电平音频输出
附加输入可接受平衡/非平衡单声道线路电平音频信号，以便与 4 路可切 换输入中的任何一路混合
响度控制
用于 RGB 延迟的三动作切换
前面板安全锁定
可机架式安装、1U 高、全机架宽的金属外壳
内置式通用电源
集成的立体声音频放大器在每个通道上为 4 Ω 提供 12 W rms 输出， 为 8 Ω 提供 8 W rms 输出
在绝缘的螺丝端子上输出放大的立体声音频
示意图
面板图
| MLS 304 Series | |||
| Video | |||
|---|---|---|---|
| Gain | Unity | ||
| Bandwidth | 280 MHz (-3 dB) | ||
| Differential phase error | 1.0° at 3.58 MHz and 4.43 MHz | ||
| Differential gain error | 1.0% at 3.58 MHz and 4.43 MHz | ||
| Crosstalk | -68 dB @ 10 MHz, -39 dB @ 100MHz | ||
| Switching speed | 5 ms (max.) | ||
| Video input and loop through | |||
| Number/signal type | 2 RGBHV, RGBS, RGsB, RsGsBs 1 RGBHV, RGBS, RGsB, RsGsBs local monitor loop-through 2 composite video |
||
| Connectors | 2 female 15-pin HD (RGB), 1 female 15-pin HD (RGB loop-through) 2 female RCA (composite video) |
||
| Nominal level | 1 Vp-p for Y of S-video, and for composite video 0.7 Vp-p for RGB |
||
| Minimum/maximum levels | |||
| RGB | Analog: 0.3 V to 1.5 Vp-p with no offset | ||
| S-video, composite video | Analog: 0.4 V to 2.0 Vp-p with no offset | ||
| Impedance | 75 ohms | ||
| Horizontal frequency | 15 kHz to 145 kHz | ||
| Vertical frequency | 30 Hz to 170 Hz | ||
| Return loss | |||
| RGB | <-40 dB @ 5 MHz | ||
| S-video | <-25 dB, 0 to 10 MHz | ||
| Composite video | <-40 dB, 0 to 10 MHz | ||
| DC offset (max. allowable) | 1.5 V | ||
| Video output | |||
| Number/signal type | 1 RGBHV, RGBS, RGsB, RsGsBs (follows input) 1 composite video |
||
| Connectors | 5 female BNC (RGB) 1 female BNC (composite) |
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| Nominal level | 1 Vp-p for Y of S-video, and for composite video 0.7 Vp-p for RGB |
||
| Minimum/maximum levels | |||
| RGB | Analog: 0.3 V to 1.5 Vp-p (follows input) | ||
| Composite video | Analog: 0.4 V to 2.0 Vp-p (follows input) | ||
| Impedance | 75 ohms | ||
| Return loss | <-40 dB @ 5 MHz | ||
| DC offset | ±5 mV with input at 0 offset | ||
| Switching type | Triple-Action (RGB delay) | ||
| Sync | |||
| Input type | RGBHV, RGBS, RGsB, RsGsBs | ||
| Output type | RGBHV, RGBS, RGsB, RsGsBs (follows input) | ||
| Standards | NTSC 3.58, NTSC 4.43, PAL, SECAM | ||
| Input level | 2.0 V to 5.0 Vp-p | ||
| Output level | TTL: 5.0 Vp-p, unterminated | ||
| Input impedance | 10k ohms | ||
| Output impedance | 75 ohms | ||
| Max. input voltage | 5.0 Vp-p | ||
| Max. propagation delay | 30 ns | ||
| Max. rise/fall time | 4.0 ns | ||
| Polarity | Positive or negative (follows input) | ||
| Audio | |||
| Gain | Unbalanced output: 0 dB; balanced output: +6 dB | ||
| Frequency response at 1 watt output | |||
| Preamp/Lineout | 20 Hz to 20 kHz, ±0.5 dB | ||
| Direct (4/8 ohm) | 20 Hz to 20 kHz, ±1.0 dB | ||
| Transformer (70 V or 100 V mono amplifier) | |||
| 50 Hz to 20 kHz, +0 dB/-3 dB | |||
| THD + Noise | |||
| Power amp (mono or stereo) | 0.037% @ 1 kHz at nominal level (1 watt, 8 ohm load) | ||
| Preamp | 0.11% @ 1 kHz at nominal level | ||
| Lineout | 0.018% @ 1 kHz at nominal level | ||
| S/N at maximum power output (unweighted) | |||
| Power amp | >75 dB @ 10 Hz to 22 kHz | ||
| Preamp | >80 dB @ 10 Hz to 22 kHz | ||
| Lineout | >80 dB @ 10 Hz to 22 kHz | ||
| Crosstalk | |||
| Power amp | <-75 dB @ 1 kHz, fully loaded | ||
| Preamp | <-75 dB @ 1 kHz, fully loaded | ||
| Lineout | <-80 dB @ 1 kHz, fully loaded | ||
| Stereo channel separation | >80 dB @ 1 kHz | ||
| CMRR | >85 dB @ 20 Hz to 200 Hz, >75 dB @ 20 Hz to 20 kHz | ||
| Bass | ±10 dB @ 100 Hz | ||
| Treble | ±10 dB @ 10 kHz | ||
| Loudness (contour) | +6 dB @ 100 Hz to 10 kHz | ||
| Audio input | |||
| Number/signal type | 4 stereo, unbalanced 1 Aux/Mix balanced/unbalanced mono (nonswitchable) |
||
| Connectors | 2 pairs of female RCA connectors (inputs 1-2) 2 female 3.5 mm mini stereo jacks (unbalanced only) (inputs 3-4); tip (L), ring (R), sleeve (GND) (1) 3.5 mm captive screw connector, 3 pole (Aux/Mix input) |
||
| Impedance | |||
| Aux/Mix input | >18k ohms unbalanced, DC coupled | ||
| All other inputs | >10k ohms unbalanced, DC coupled | ||
| Nominal level | -10 dBV (316 mVrms) | ||
| Input gain adjustment | -42 dB to +24 dB, adjustable per input | ||
|
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| Audio output — Lineout and Preamp | |||
| Number/signal type | 2 (1 Lineout/fixed and 1 Preamp/variable) stereo/mono, balanced/unbalanced | ||
| Connectors | (2) 3.5 mm captive screw connectors, 5 pole | ||
| Impedance | 50 ohms unbalanced, 100 ohms balanced | ||
| Gain error | ±0.8 dB channel to channel | ||
| Nominal level | Configurable: -10 dBV (316 mVrms, default), +4 dBu (1.23 Vrms) | ||
| Maximum level (600 ohm) | |||
| Preamp | >+19 dBu, balanced <0.1% THD+N | ||
| Lineout | >+16 dBu, balanced <0.1% THD+N | ||
|
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| Audio output — mono power amp (MLS 304MA only) | |||
| Number/signal type | (1) mono | ||
| Connector | (1) 5-position screw terminal | ||
| Sensitivity | -20 dBV (-17.8 dBu; 100 mVrms) (adjustable) for maximum power output | ||
| Power bandwidth | |||
| Direct (4 ohm) | 1 kHz at 4 ohms | ||
| Direct (8 ohm) | 20 Hz to 20 kHz, 0.15% THD | ||
| Transformer (70 V) | 50 Hz to 20 kHz, 1% THD | ||
| Transformer (100 V) | 50 Hz to 20 kHz, 0.5% THD | ||
| Maximum power output | |||
| Direct (4/8 ohm) | 20 watts max. (continuous) | ||
| Transformer (70/100 V) | 16 watts max. (continuous), transformer coupled | ||
| Protection | Input limiting, thermal, short circuit | ||
| Audio output — stereo power amp (MLS 304SA only) | |||
| Number/signal type | (1) stereo (default) or dual mono (configured via software) | ||
| Connector | (1) 5-position screw terminal | ||
| Sensitivity | -20 dBV (-17.8 dBu; 100 mVrms) (adjustable) for maximum power output | ||
| Power bandwidth | |||
| Direct (4 ohm) | 1 kHz at 4 ohms | ||
| Direct (8 ohm) | 20 Hz to 20 kHz, 0.8% THD | ||
| Maximum power output | |||
| Direct (4 ohm) | 24 watts max. (continuous), 12 watts (rms) per channel | ||
| Direct (8 ohm) | 16 watts max. (continuous), 8 watts (rms) per channel | ||
| Protection | Input limiting, thermal, short circuit | ||
| Control/remote — switcher | |||
| Serial control port | RS-232, 3.5 mm captive screw connector, 5 pole (uses 3 poles) | ||
| Baud rate and protocol | 9600, 8-bit, 1 stop bit, no parity | ||
| Serial control pin configuration | 1 = Tx, 2 = Rx, 4 = GND | ||
| Program control | Extron configuration program for Windows ® Extron Simple Instruction Set (SIS ™ ) |
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| General | |||
| Power | Internal Input: 100-240 VAC, 50-60 Hz, 48 watt power supply |
||
| Temperature/humidity | Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing Operating: +32 to +113 °F (0 to +45 °C) / 10% to 90%, noncondensing |
||
| Cooling | Convection, no vents | ||
| Mounting | |||
| Rack mount | Yes, with included brackets | ||
| Enclosure type | Metal | ||
| Enclosure dimensions | 1.75" H x 17.5" W x 8.5" D (1U high, full rack wide) 4.4 cm H x 44.4 cm W x 21.6 cm D (Depth excludes connectors and knob. Width excludes rack ears.) |
||
| Product weight | 6.0 lbs (2.7 kg) | ||
| Shipping weight | 11 lbs (5 kg) | ||
| Vibration | ISTA 1A in carton (International Safe Transit Association) | ||
| Regulatory compliance | |||
| Safety | CE, c-UL, UL | ||
| EMI/EMC | CE, C-tick, FCC Class A, ICES, VCCI | ||
| Warranty | 3 years parts and labor | ||
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| (8.0-041311-D11) | |||
| 可选附件 | ||
|---|---|---|
| MLC 226 IP | 带 IP Link® 以太网控制的增强型 MediaLink® 控制器 | |
| RCAF-BNCM | RCA Female to BNC Male Adapter | |
| MLM-WB+ | 带向下翻转 4U 机架空间的可锁定金属墙盒 | |
| VGA-A M-M MD | 插头对插头 VGA 和音频电缆 - 压铸连接器 | |
| SYM BNCM | 15 针 HD 插头对 BNC 插头微型高分辨率电缆 | |
| SYM BNCF | 15 针 HD 插头对 BNC 插座微型高分辨率电缆 | |
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