Tektronix 11 aps free download

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Testing Automatic Protection Switching This section describes how to generate Automatic Protection Switching (APS) commands and view the network response. APS commands are located in the K1 and K2 bytes of the section overhead. The K1 byte indicates a request for switch action. The K2 byte provides additional information about network architecture and alarm conditions. Setting the APS Mode The APS mode specifies whether the network is a ring network or a span network. The APS mode determines how the K1 and K2 bytes are interpreted and displayed by the CTS850. To specify the APS mode: Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT APS APS Mode Span COMMANDS (see Figure 3 83) Ring CTS850 SDH/PDH Test Set CTS850 SDH/PDH Test Set User Manual 3 217 Testing Automatic Protection Switching Figure 3 83:The APS COMMANDS Page Setting the K1 Byte There are two ways to edit the bits of the K1 byte. The first way is to set the value of each bit of the byte, one bit at a time. The second way is to assign values to the bits using preset choices, which use mnemonics to identify bit patterns. To set the bit pattern of the K1 byte one bit at a time: Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT APS K1 FULL BYTE Set to COMMANDS 00000000 Set to 11111111 Default 10101010 EDIT BYTE 3 218 CTS850 SDH/PDH Test Set User Manual Testing Automatic Protection Switching H Select EDIT BYTE to set the byte to a pattern different from the preset choices. To set the bit pattern for the first four bits of the K1 byte: Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT APS Bits 1 4:Switch as appropriate COMMANDS Request (under K1 FULL BYTE) The se