User manual TELEX AUDIOCOM SSA-324 REV G

[. . . ] (Lincoln, NE) Telephone: 402-467-5321 Fax: 402-467-3279 Factory Service: 800-553-5992 Please include a note in the box which supplies the company name, address, phone number, a person to contact regarding the repair, the type and quantity of equipment, a description of the problem and the serial number(s). TABLE OF CONTENTS 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 PROPRIETARYNOnCE SECTION 1; DESCRIPTION AND SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 5 1. 2 SPECIFICATONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In addition, it can optionally interconnect "Calls" or tally signals between systems. The four-wire interface can deliver and accept high level signals such as those from the McCurdy intercom system. An SSA324 can also function as a two-wire to two-wire interface by interconnecting the two individual interfaces at the four-wire level. The SSA324 carries two voice channels when used as a dual two-wire to four-wire interface, and one voice channel when functioning as a two-wire to two-wire interface. A front panel channel select switch for each of the two interfaces (A and B) will select one of two, two-wire channels. For Audiocom use, a rear panel switch will select balanced two-wire operation. Front panel controls include 1) adjustments for null, level, ducking, 2) switches for monitoring and channel select. Rear panel controls include balance/unbalance switches for er the two-wire connection of each interface. R a panel connectors include two XLR3 connectors for two-wire, eight terminals for two four-wire interconections, one 25 pin D connector for duplicate four-wire connections plus options connections. The D connector aids rapid replacement where meantime-to-repair is an issue and also allows option strapping. The SSA324 replaces the Model TWI224 and TWI222 interfaces where powering from the intercom is not required. Differences between the Model TWI224 / TWI222 interface and Model SSA324 include the following: 1)The SSA324 is self (locally) powered, the TWI224 / TWI222 is usually powered from the TW line or may be locally powered. 2) The SSA324 has a maximum output at the four-wire output port of +22 dBm, the TWI224 / TWI222 maximum output is 9 dBm. Adjustable, 0 to 30 dB. Each interface has depth level adjustment (front panel). Monitoring Uses standard headset. User uses headset microphone or a built in oscillator to adjust for null in headset earphones (or via a built-in oscillator which is jumper selected by a jumper on the printed circuit board). There are three null adjustments associated with each twowire port. These are resistive (medium), capacitive (high), and inductive (low) nulls. Medium, High, and Low refers to frequency ranges; medium centers about 1kilohertz, high, 3 kilohertz, low, 300 hertz. 1. 2. 1 FUNCTIONAL SPECIFICATIONS The Model SSA324 consists of two two-wire to four-wire convertersin a singlepackage (converter A and converter B). If the two converters are interconnected, the Model SSA324 then functions as two-wire to two-wire converter. [. . . ] 16. Adjust DuckLevel only if full duplex operation is not possible because of feedback. Unbalance (Out) Balance (In) / Select Two-Wire, System B SSA324 User Manual 11 SECTION 7: DIAGRAMS Document N m e Sz m u br ie SD6926 SD6926 SD6926 AS6926 B B Schematic Diagram- System To System Adapter, Model SSA324, Sht 1 of 3 Schematic Diagram- System To System Adapter, Model SSA324, Sht 2 of 3 Schematic Diagrarn- System To System Adapter, Model SSA324, Sht 3 of 3 Assembly Diagram, PCA, System To System Adapter, Model SSA324 B B 12 SSA324 User Manual +-WIRE IN 4-WIRE OUT TRANSFORMERS T i 0 2 AND T202 NORMALLY NOT INSTALLED. I I TRANSFORMERS T l O l AND T201 NORMALLY NOT INSTALLED. 1 LAST USED: NOT USED: ~ l e o ?R126. Rl27 ! TRANSFORMERS T I 0 3 AND T 2 0 3 NORMALLY NOT INSTALLED. [. . . ]