Setting Up Delay Test Mode

Use this test mode to have the test set measure the round trip delay of an E1 circuit. It is necessary to have a loop condition at the far end during this test. The best accuracy is obtained when a hard loop exists at the far end. Be aware that devices placed in loopback may add additional delay. During this mode, a pattern consisting of a zero inserted into a string of ones is transmitted and analyzed to determine the delay in the path. The selected test pattern is sent as filler during the calculation interval.
 To Preform a Sample Delay Mode Test Procedure

Step
 		Notes
1
 		[Mode]
2
 		[Backhaul]
3
 		[E1 Analyzer]
4
 		[Get Started/ Test Mode]
5
 		Perform Delay test.
  1. [Delay]
  2. [Full E1]
Use this test mode to measure the delay between the Primary Tx and Rx ports. Use this measured delay to determine the approximate distance between near end and far end. The far end of the line must be manually looped during this test. Since a signal is being sent on the E1 line, service on the E1 will be affected.
 Delay measurements require full E1 bandwidth.
6
 		[Setup]
 		Select this to display a list of setup choices that pertain to this test mode.
7
 		Setup Rx Input.
  1. [Rx Input]
  2. [Terminate]
This assumes the test set is connected into a jack that interrupts the circuit.
8
 		Setup Line Code.
  1. [Line Code]
  2. [AMI] or [HDB3]
This assumes that the circuit is designed for AMI or HDB3.

9
 		Setup Framing.
  1. [Framing]
  2. [Unframed] or [PCM30] or [PCM30 + CRC4] or [PCM31] or [PCM31 + CRC4]
This assumes that the circuit has been designed for the option you select.
10
 		Setup the Pattern.
  1. [Pattern]
  2. Use the up and down arrow buttons to move to a pattern.
  3. [Select]

11
 		Setup the Tx Pattern.
  1. [Tx Pattern]
  2. [Normal] or [Invert]

12
 		Setup the Tx Clock.
  1. [Tx Clock]
  2. [Internal] or [Primary Rx]
None of the options available on [More 1 of 2] are available in Delay mode.