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Data Sheet

DSS1

Digital Speech Memory Module

DSS1

Digital speech memory module

with RAM and flash memory banks

Fig. DSS1 (L- No. 2.600)

At a Glance:

• 6 memory addresses for speech recording:

- Up to 8 banks in RAM memory (volatile)

- Up to 8 banks in flash memory (permanent)

• Write protection feature for speech memory

• Ringing tone detector, e.g. for railway radio

• Synchronisation mode for redundant systems

Date: 13.03.2009 Page:

1/9

Author:

Document-No.:

DB_DSS1_2600_01

Summary of content (9 pages)

PAGE 1
Data Sheet DSS1 Digital Speech Memory Module DSS1 Digital speech memory module with RAM and flash memory banks Fig. DSS1 (L- No. 2.600) At a Glance: • 6 memory addresses for speech recording: - Up to 8 banks in RAM memory (volatile) - Up to 8 banks in flash memory (permanent) Date: • Write protection feature for speech memory • Ringing tone detector, e.g. for railway radio • Synchronisation mode for redundant systems 13.03.2009 Page: 1/9 Author: HS Document-No.
PAGE 2
Data Sheet DSS1 Digital Speech Memory Module The module DSS1 makes it possible to save recurring verbal announcements and to output them on call stations and loudspeaker circuits. For this there are eight memory banks available each on RAM and flash chips. The module has four independent sets which can all be run in different modes of operation. This way different functions can be realized on a DSS1. Each set can simultaneously access each of the 2 x 8 memory banks.
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Data Sheet DSS1 Digital Speech Memory Module Function Description: The principle functions are illustrated in the following block diagram.
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Data Sheet DSS1 Digital Speech Memory Module The module is available in two variations which only differ in terms of their software: - Ringing tone detector Speech memory Variation "Ringing tone detector": This variation is currently in use at the Deutsche Bahn AG and serves to switch on radio modules. Basic arrangement of a DVS-21 for ringing ton analysis The DSS1 checks cyclically whether a signal is pending from the radio module on the low frequency line.
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Data Sheet DSS1 Digital Speech Memory Module The following frequencies are available per default: 1520 Hz 1750 Hz 2135 Hz Other frequencies are possible for special cases. Variation "Speech Memory": In this variation, three further modes of operation can be selected in the configuration software: - Speech Memory - Sync Master - Sync Slave The features on the card depend on the mode of operation.
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Data Sheet DSS1 Digital Speech Memory Module Modes of Operation "Sync Master" and "Sync Slave" A redundant public address system can be built with two DVS-21 systems in order to ensure adequate public address capabilities for possible disruptions.
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Data Sheet DSS1 Digital Speech Memory Module The Front Plate Symbols and their Meaning: The System Blinker Addressing from processor taking place I/O Input/Output BUS output works as push-push operation with the system blinker BUS input works as push-pull operation with the system blinker 01 - 03 Status Display Set 1 13 - 15 04 - 06 Status Display Set 2 16 - 18 07 - 09 Status Display Set 3 19 - 21 10 - 12 Status Display Set 4 22 - 24 LED Displays (depending on the set): 1 13 4 16 7 19 10 22
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Data Sheet DSS1 Digital Speech Memory Module LED Illumination Function Description Delete Delete flash Flash Delete Delete terminated with success Flash Recording Transfer terminated RAM Æ Flash Recording Inactive RAM Æ Flash Special Cases If this pattern appears immediately following the copy command, there is no flash in the socket or the flash is defective When this pattern appears, then the flash was delivered write protected.
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Data Sheet DSS1 Digital Speech Memory Module Technical Data: Operating Voltage: +/-5 V (control) Operational Current (+5 V): Date: Weight: 300 g Installation Height: 3HE Installation Width: 6TE 13.03.2009 Page: 9/9 6 mA Author: HS Document-No.