ET2148 G.703 Circuit Tester
Specification

• Power: Off/On
• Sensiitivity: Hi = -43dB, Lo = -12dB
• Matching: 75ohm, 120ohm
• Master / Slave In Master ET2048 originates the timing In Slave ET2048 synchronises output to the clock of the received signals.
• Pattern Select: press to sequentially select all 0s, all 1s, alternate 0s/1s, PRP15
• Inject Errors: (BERT mode only)
• Loop up/down: press to send loop set and loop clear down pattern sequences
• Reset: resets displayed error counts

• Lo Battery: £ 30 mins power remaining
• M / S: Master / Slave clocking mode
• 0 / 1: indicates test pattern selected all 0s, all 1s, both = alternating
• PRP15:
  • Green = PRP15 test pattern being transmitted
  • Red Flashes = errors being sent
  • (green= valid signals, red= no HDB3 signals)
• U / D:
  • U = Loop up sequence sent
  • D = Loop Down sequence sent
• Line status:
  • Green = valid HDB3 signals detected
  • Red = no valid HDB3 signals detected
  • Yellow (flash) = BPV-Bipolar Violations-detected
• 0 / 1: each lights for every 0 or 1 detected
• A0s: More than 32 contiguous zeros detected
• A1s: More than 32 contiguous ones detected

• Green = error free test pattern being received
• Red (flash) = test pattern errors

• Matching: 75W or 120W
• Return Loss: >15dB (51kHz to 3.072mhz)
• Dynamic Range: 0 to -12db or 0 to -43dB
• Isolation: typically 3kV transmit to receive
• Transmit: pulse amplitude and masks to G.703
• Test Pattern: PRP15 ( 2/15-1)

• Size: 65´120´22mm (excluding connectors)
• Weight: 140g (5oz) approx (including batteries)
• Case: ABS to UL-94H

• Source: 2 ´ AA cells (MnAlk recommended)
• Life: typically 8 hours