Analogue (DSLA)

The DSLA is a high-quality 2 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 telephone line ports (600 Ω or complex impedance) on RJ11. Output level limited to +6dBm. DTMF or Pulse dialling
  • Two 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
  • Monitor output with switching/mixing of input and output of each channel

Back Panel Interfaces

  • 10/100 Mbps Ethernet, IPv4
  • RS232 9-way serial
  • 4 x 3.5mm jacks for external synchronisation and control purposes

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

Physical Characteristics

  • Dimensions: 72mm high x 218mm wide x 200 deep
  • Weight: 3kg excluding packaging and accessories

Operating Conditions

  • Power Supply: 100-240V AC or 9-18V DC, 12W
  • Temperature Range: -2 to 40oC

Approvals and Compliance

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