User manual TELEX AUDIOCOM US-2000 REV D

[. . . ] The US-2000 is factory set to allow all channels (including those of any attached ES-4000 units) to be heard through a single powered speaker, such as the Audiocom® SPK-1000. If the user wants to have each channel go to a separate powered speaker, three jumpers must be changed as described in the section on Speaker Setup in this manual. The headset microphone termination is initially set for unbalanced operation. To change the headset microphone termination, refer to Table 2 in this manual for the position of jumper J16. [. . . ] (Works with US-2000, ES-4000, SS-1000, BP1000 and BP2000 stations. ) Tap the key once to access this feature. To turn off all activated microphones on any channel, press the Talk or Listen key for the desired channels. Program Kill Feature: This feature allows the program audio to be individually disabled on each channel. The key will glow green and the current Program Kill status will be displayed (when a Talk key is lit, program audio is enabled on that channel). Press a Talk key to enable or disable program au- 5 dio on that channel. Headset Audible Call Alert Feature: This feature will cause an audible beep in the headset whenever there is an incoming call from any channel. The key will glow green and the current Headset Audible Call Alert status will be displayed (when both Call keys are lit, Headset Audible Call Alert is enabled). Press either Call key to enable or disable Headset Audible Call Alert on both US-2000 channels. With either the Headset or Panel Mic selected, the Talk keys operate in two ways: Latched Mode: Tap the key once to talk. Call keys The Call function allows the user to signal other devices on the intercom system. The Call keys operate in two ways: Call receive: When there is an incoming call signal, the key blinks red. (If Headset Audible Call Alert is enabled, incoming calls will cause a beep in the headset. ) To respond to an incoming call, turn on the Talk key for that channel and begin talking. Call send: To send a call signal to a station on a channel, press and hold the Call key until a verbal response is received. The Listen key 6 for that channel automatically turns on when the Call key is pressed. The Listen keys operate in two ways: Latched Mode: Tap the key once to turn on listen. Program Inputs Connector and Program Volume Controls In a television studio intercom system, the program input is usually the actual program audio signal. In another intercom system, the program input can be any auxiliary audio signal, such as background music. There is a separate program input for each channel (see Connector Pin Configurations for connector details). The VOL PGM 1 control adjusts the program 1 level heard on intercom channel 1. The VOL PGM 2 control adjusts the program 2 level heard on intercom channel 2. As supplied, the US-2000 does not interrupt the program inputs during talk. Program interrupt during talk requires an internal switch change (see Table 1, switches SW2-4 and SW2-5). [. . . ] Output Type: 1/8-inch Stereo Phone Jack Unbalanced Wiring (-000 Model) Tip: PA output high Ring: Not used Sleeve: Common Balanced Wiring (-001 Model) Tip: PA output high Ring: PA output low Sleeve: Common Speaker Outputs (Connect to a powered speaker or the auxiliary input of an amplifier) Type: RCA Phone Jack Tip: Speaker output high Sleeve: Common Ground Program 1 input low Program 2 input low NC NC Program 1 input high Program 2 input high NC NC 14 Intercom Channel Connectors Type: One XLR-3M and XLR-3F pair for each channel Audiocom® Mode (Internal switch SW1 set to BAL position) Pin 1 Common Pin 2 Intercom audio low and +24 VDC input Pin 3 Intercom audio high and +24 VDC input Clear-Com Mode (Internal switch SW1 set to UNBAL position) Pin 1 Common Pin 2 +24 VDC input Pin 3 Intercom audio high Expansion Out Type: 2. 0 mm stereo jack Tip: Talk output Ring: Listen input Sleeve: Common External Power Type: 2. 0 mm jack Internal pin: positive (+) External shell: negative (-) 15 SPECIFICATIONS GENERAL Power Requirements: Channel supplied: 24 VDC nominal (12 to 30 VDC), 65 to 150 mA External supply: 12 to 15 VDC, 65 to 150 mA Environmental Requirements: Storage: -20ºC to 80ºC; 0% to 95% humidity, non-condensing Operating: -15ºC to 60ºC; 0% to 95% humidity, non-condensing Dimensions: 1. 75" (44. 5 mm) H x 8. 25" (209. 5 mm) W x 5. 25" (133. 4 mm) D Weight: 1. 3 pounds (0. 59 kg) INTERFACE REQUIREMENTS: Headset: 50 to 200W dynamic microphone 150 to 600W headphones Panel Microphone: 5 kW Electret microphone (-57 dB) Balanced Intercom Channel: Output Level: 1 Vrms nominal Input Impedance: 300W Bridging Impedance: greater than 10, 000W Return Cancellation: -40 dB, 35 dB adjustable range Call Signalling: Send: 20 kHz ±100 Hz, 0. 5 Vrms ±10% Receive: 20 kHz ±800 Hz, 100 mVrms Mic-Off Frequency: Send: 24 kHz ±300 Hz, 0. 5 Vrms ±10% Detect: 24 kHz ±800 Hz, 100 mVrms Noise Contribution: less than -70 dB Common Mode Rejection Ratio: greater than 50 dB 16 Unbalanced Intercom Channel: Output Level: 200 mVrms ±10% Input Impedance: 150W Bridging Impedance: greater than 10, 000W Return Cancellation: -40 dB, 35 dB adjustable range Call Signalling: Send: 11 ±3 VDC Receive: 4 VDC minimum PROGRAM INPUT Voltage Gain Range: 25 ±3 dB Output Level: 1. 0 Vrms nominal, 2. 3 Vrms maximum Input Impedance: Balanced: 75 kW Unbalanced: 38 kW Common Mode Rejection: Greater than 50 dB PA OUTPUT Output Level: 235 mVrms nominal HEADPHONE AMPLIFIER Voltage Gain: 30 ±3 dB Maximum Output: 250 mW ±10% into 150W, 65 mW±10% into 600W Frequency Response: 200 Hz to 8 kHz +1/-3db Audible Alert: 2 kHz, at the headset 17 Total Harmonic Distortion: Less than 0. 2% at 200 mW Sidetone: 18 ±2 dB, adjustable PANEL MICROPHONE AMPLIFIER: Voltage Gain: · Mic to CHN; 25±3 dB, before limiting · Mic to Headphone; adjustable, 45 dB ±10% maximum, into 150W · Mic to PA; 15 ±3 dB, 235 mVrms ±10% Frequency Response: 200 Hz to 8 kHz +1/-3dB Total Harmonic Distortion: Less than 0. 2% at CHN output VOX Range: -75 to -30 dB, -60 dB factory set SPEAKER OUTPUT: Output Level: 0 dB nominal (1. 0 Vrms) Output Impedance: 1000W nominal Frequency Response: 200 Hz to 15 kHz +1/-3dB 18 FACTORY SERVICE All equipment returned for repair must be accompanied by documentation stating your return address, telephone number and proof of date of purchase, along with a description of the problem. In lieu of this, you may obtain a Return Authorization form from our Customer Service Department. Telephone: (612) 884-4051 (Collect calls not accepted) Return equipment to: Service Department Telex Communications, Inc. Warranty Repairs - If in warranty, no charge will be made for the repairs. [. . . ]