Tx Control Codes; Rx Level And Sealing Current Detection; Bert - Bit Error Rate Test And Display - Textron Greenlee Communications DataScout 10G User Manual

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TX Control Codes

TX Control Codes
To transmit a control code tap the TX code pull down menu and select the control code
you want to send.
DMI – Data Mode Idle (all 1's)
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CMI – Control Mode Idle (1111xov where xov is a BPV)
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OOS – Out of Service (network out of service)
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OOF – Out of Frame
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UMC- Unassigned Mux Code
ASC – Abnormal Station Code (sent when the far-end CSU/DSU is unplugged).
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MOS – Mux Out of Sync
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To stop sending a control code tap the selected control code then tap "TX code" (off).

RX Level and Sealing Current Detection

The test set will display receive (input) level at the bottom of the screen along with
sealing current detected on No Loop Current. In a 4-Wire DDS circuit there must be
sealing current.

BERT - Bit Error Rate Test and Display

To send a straight-away BERT or BERT to a unit in loopback tap the BERT pull down
menu and select the desired BERT.
2047 – 2^11-1 (2047 bit) pseudo-random data sequence
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511 – 2^9-1 (511 bit) pseudo-random data sequence
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SP1 – DDS Special Pattern 1 100 Bytes of 0xFF and 100 Bytes of 0x00
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SP2 – DDS Special Pattern 2 100 Bytes of 0x7E and 100 Bytes of 0x00
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SP3 – DDS Special Pattern 3 Continuously send 0x32
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SP4 – DDS Special Pattern 4 Continuously send 0x40
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SP5 – DDS Special Pattern 5 Combination of SP1-4
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Packet – Embeds CMI(Control Mode Idle) into a 2047 or 511 used in Switch 56
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Modes
All-1's – DMI (used for optimum level measurements)
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