Analogue (DSLA)

The DSLA is a high-quality 2, 4 or 6 channel analogue hardware device designed by Malden with an optimal interface for voice-band test.

Each channel offers three modes of connection to connect reliably to any type of analogue system you may need to test. Connect to the handset port on a VoIP phone, the 2-wire line connection to a PBX or PSTN and to the hands-free port of a mobile phone or a sound card in a PC.

Technical Specifications

Front Panel Interfaces

  • Two, four or six telephone line ports (600 Ω or complex impedance) on RJ11. Output level limited to +6dBm. DTMF or Pulse dialling
  • Two, four or six balanced and floating handset inputs (10kΩ) and outputs (25 Ω) on RJ22. Output level attenuated by 28dB. Network isolated.
  • Two balanced and floating inputs (600 ± 0.1 Ω or 1 MΩ) and outputs (600 ± 0.1 Ω) on 4mm sockets (2 Channel DSLA only)
  • Monitor output(s) with switching/mixing of input and output of each channel pair
  • 4 or 6 x 3.5mm jacks for control purposes (4, 6 Channel DSLA)

Back Panel Interfaces

  • 10/100 Mbps Ethernet, IPv4 for each channel pair
  • RS232 9-way serial for each channel pair
  • 4 x 3.5mm jacks for external synchronisation and control purposes (2 Channel DSLA)
  • 4 or 6 x 3.5mm jacks for external synchronisation (4, 6 Channel DSLA)

Signal Generation

  • Sample Rates 8k, 16k & 32k or 8k, 16k & 48k
  • Sound file output levels -99dBm to +10dBm
  • Sine wave 20Hz to 22kHz, -99dBm to +10dBm, any duration
  • Swept sine wave 20Hz to 22kHz, -99dBm to +10dBm any duration
  • White, Gaussian white, pink noise -99dBm to +10dBm any duration
  • DTMF, -99dBm to +10dBm any duration, user definable twist, frequency offset and break duration
  • Two independent tracks on each channel to create complex mixed signals

Measurement Performance

  • Sample Rates 8k, 16k, 32k or 8k, 16k & 48k
  • Linearity 0.1dB for levels -60 to +10dBm
  • Linearity 0.1dB for frequencies 20Hz to 22 kHz
  • Noise floor -85dBm or better
  • Range of measured levels -75dBm to +19dBm
  • Minimum measurable mean active speech level -65dBm
  • Dynamic range of balanced inputs 110dB (2 Channel DSLA only)

Physical Characteristics

  • Dimensions:  2 Channel DSLA 72mm high x 218mm wide x 200 deep
  • Dimensions:  4, 6 Channel DSLA 86mm high x 385mm deep, 19 inch rack mounting
  • Weight: 3Kg/5Kg excluding packaging and accessories

Operating Conditions

  • Power Supply: 2 Channel DSLA 100-240V AC or 9-18V DC, 12W
  • Power Supply: 4 or 6 Channel DSLA 100-240V AC, 21/27W
  • Temperature Range: -2 to 40oC

Approvals and Compliance

  • RoHS: Hazardous substances:
  • WEEE: Disposal of hazardous parts
  • CE
  • FCC