DHX TH-4B hotline coupler
The TH-4B hotline telephone coupler is a professional hotline telephone access and control device, which can be used in various radio stations and television stations in live broadcast programs, or applicable to electrical conferences, telephone recording and other applications. Key Features ★ Provide four-way telephone access, you can implement multiple calls ★ Audio and control interface for two live rooms, used for two live rooms, users can switch to switch ★ Equal sound network, Each way has a roll-up tone switch, which must be turned on to debug ★ Provide a non-conductive mode, easy to achieve a lead-free and non-conductive switch ★ real-time level display and volume control ★ 19-inch 1U standard chassis ★ automatic lightning measures, suitable Lightning area, safe use indicator TH-4B ★ audio input: L 0kΩ balance 0dB 6.35mm three-core plug (from live room) ★ audio output: (1) 20Ω balance 0DB 6.35mm three-core plug (to live room) (2) 600Ω (mixed output) non-balance -10dB 6.35mm three-core plug (3) 16Ω (earphone listening) 6.35mm three-core plug (4) 8Ω (internal call output) non-semi-horizontal 6.35mm three-core plug ★ Sound: 300Hz- -3 kHz ★ distortion: ≤1% ★ Signal noise ratio: ≥70dB (no telephone line noise) ★ Side sound suppression: ≥ 45dB ★ Power consumption: 10W Technical performance TH-4B ◇ This product is professional hotline access and control The device can be used for all kinds of broadcasting stations, and the television station can be used in live broadcast programs, or applicable to telephone conferences, telephone recording and other occasions. ◇ Provide four-way telephone access, using microcomputer chip and electronic switch technology, all road controls are independent, and the cut-out operation is convenient and flexible, and you can achieve the four-way phone simultaneously, the audience and the host, the audience and the audience are both It can be set to multi-party calls, free conversation, or the call hold, talk separately. ◇ Provide audio and control interfaces of the two live rooms, and users only need to add a control small box and the corresponding control cable to achieve a hotline device in two live rooms. ◇ Each way is equipped with a roll-up tone switch, which can achieve better phone sound quality to avoid harmful sound feedback. ◇ In the main broadcast and host control small box built-in call, including the microphone and speaker (the host can turn the call to the mixer or headphone distributor), and set the call button to make internal calls are very convenient. . ◇ The no-conductive mode is suitable for automatically answering and switching the hotline on only the host present. Structure and Mounting TH-4B panel Description The picture below shows the front and rear panel structural functions of the TH-4B hotline telephone coupler host. Host Front Panel 1, T E L O U T L E V Live Chamber Sends a Signal Size Adjustment Covered Cathode (Tape Code) to the telephone line. 2, T E L I N L E V E l Telephone Lines Send Signal Size Tuning Knot (Tape Instructions) to live room. 3, the headset can listen to the volume adjustment knob. 4, live room L and live room 2 Select the switching switch. 5, live room 1 and live room 2 switching instructions, red lights indicate automatic broadcast status. 6, headphone jack. 7, power switch. Mainter rear panel 8, power outlet. 9. The fuse holder (0.25 a). 10. Control cable interface, connected from left to right, respectively, respectively, respectively, the second live room, the first live room. 11, the audio input output interface, from left to right, the mixed output, go to the second live room, go to the first live room, from the second live room, from the first live room. 12, telephone interface (L i n e offline, P h o N e answering the phone). 13, lightning protection to the ground.
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