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Model 3540
Product Overview
Key Features
Specifications
Software Demo
Model 3540 Version 2 Telephone Network Emulator and Voiceband Analyzer

Note: Levels selectable as dBm (for 600 ohms DUT termination) or dBV (for CTR21).
 
Accuracy given below in (parentheses)

Central Office (FXS) Emulation
Line Type Two-Wire, Loop Start (Ground Start Optional)
Source AC Impedance Selectable 600 Ohms or CTR21 Complex
CO Voltage and Line Current Programmable -15 to -48 VDC, Current Limited to 30 mA
Ringing Voltage 10 to 100 Hz, 10 to 90 Vac RMS (+/-2 Vac)
Transmit Noise Floor < 10dBrnC
Terminal Equipment (FXO) Interface
Type 600 Ohms, Two-Wire, Loop Start DAA, FCC Part 68
Bridge Mode > 6 Mohms (for Caller ID and Audio Monitoring)
Internal 2 to 4 Wire Hybrid 600 Ohm impedance
Signaling DTMF

FSK Signal Generation and Detection
FSK Modem Standards Bell 202 and ITU V.23 in Simplex of Half-Duplex Modes
Level Resolution and Accuracy -50 to +4 dBm in 0.1 dB steps (+/- 0.5 dB)
FSK Receiver Sensitivity -30 to 0 dBm with SNR > 14 dB

USB Digital Audio Processor
Type Full-Duplex Mono or Stereo Record and Playback
Frequency Characteristics Flat, 300 to 4000 Hz (+/-0.5 dB)
Audio Format up to 22 kHz Sampling Rate, 16-Bit PCM
Audio Record Sources Channel A Tx, A Rx, A Hi-Z Tap, B Tx, B Rx, B Hi-Z Tap
(left and right may be configured separately)
Audio Playback Channel A (left), Channel B (right)

Measurements
Receive Signal Level: 10 to 10000 Hz (+/- 0.5 dB, 300 to 4000 Hz.)
Speech Level As per ITU P.56, Method B. 300 to 4000 Hz (+/- 0.5 dB.)
Idle Channel Noise C-Message & D Filters with 1010 Hz Notch option as per IEEE 743-1995. 20 to 80 dBrnC (+/- 1.0 dB)
DTMF Analysis -30 to 0 dBm (+/- 0.5 dB),Twist Accuracy: +/- 1 dB, Duration Accuracy +/- 2 ms.
Frequency Sweep/Response: 10 to 10000 Hz (+/- 1.0 dB, 300 to 4000 Hz.)
Generate DTMF/MF -50 to +4 dBm (+/- 0.5 dBm)
Programmable Tones 4 Generators Adjustable 10 Hz to 10 kHz (+/- 1 Hz)
-50 to +4 dBm (+/-0.5 dB, 300 to 4000 Hz.)
Duration: 10 to 64000 mS
Generate Noise Flat, 300 to 4000 Hz, 20 to 80 dBrnC (+/- 1.0 dB)

Network Emulation
Attenuation: 0 to 50 dB (+/- 1.0 dB, 300-4000 Hz.)
Return Loss: 12 to 48 dB (+/- 2.0 dB, 300-4000 Hz.)
Echo Level: -55 to 6 dB (+/- 2.0 dB, 300-4000 Hz.), delay 5 to 100 mS

Interface to Host PC
Type Full-Speed (12 MHz) device, compatible with USB Versions 1.1 and 2.0
Classification Internal 4-Channel Hub with a USB Digital Audio Controller and Two USB Serial UARTs

Mechanical
Size  25 x 33 x 7 cm (10" x 13" x 2.75")
Weight 3.6 kgs (8 lbs)
Operating Temperature 10 to 40C (50 to 104F)
Power 100 to 240 VAC, 50 to 60 Hz, 1.5A Max.

Specifications subject to change without notice.
Product Overview Key Features Software Demo
   
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