Rohde & Schwarz CMD65 DECT Digital Radio Test Set

The Rohde & Schwarz CMD65 DECT Digital Radio Test Set delivers comprehensive testing of DECT devices, including fixed and portable parts, while optionally supporting GSM 900/1800/1900 standards. This single platform integrates CMD55 (GSM) and CMD60 (DECT) capabilities, eliminating the need for separate instruments in R&D, manufacturing, and service environments.

– Technical Specifications

Supported Standards
• DECT (Digital Enhanced Cordless Telecommunications)
• GSM 900/1800/1900 (optional)

Audio Generator (Option CMD-B41)
• Frequency range: 50 Hz to 10 kHz at 0.1 Hz resolution
• Output voltage: 10 µV to 5 V with 10 µV resolution (1%)
• Distortion: ≤0.5%

Audio Voltmeter
• Frequency range: 50 Hz to 10 kHz
• Measurement range: 0.1 mV to 30 V with 100 µV resolution (1%)

Distortion Meter
• Frequency range: 300 Hz to 3 kHz
• Input voltage range: 100 mV to 30 V
• Resolution: 0.1%; inherent distortion ≤0.5%

AF Counter
• Frequency range: 20 Hz to 10 kHz at ≤1 Hz resolution
• Input voltage range: 10 mV to 30 V

IF Counter
• Frequency range: 10 kHz to 60 MHz at 1 Hz resolution
• Input signal: 100 mV minimum; TTL signal maximum

– Key Features

• Transmitter and receiver measurements with signaling tests
• Audio analysis including echo testing for rapid go/no-go assessment
• DC ammeter/voltmeter for pulsed signal power consumption measurement
• Full dynamic power ramp measurements per GSM recommendations
• Automated regression and stress testing with go/no-go routines
• Two RF synthesizers simulating GSM base station signals; one delivers continuous BCCH
• High-contrast backlit LCD with softkey-driven menu interface
• Autotest function initiates complete measurement routines at keystroke
• Parallel measurements and multi-command IEEE strings maximize throughput

– Interfaces

• IEC/IEEE-Bus (IEEE 488, SCPI-compatible) — Option CMD-B61
• RS-232-C
• Centronics
• Reference frequency inputs/outputs — Option CMD-B3

– Typical Applications

Suitable for DECT device validation, GSM radio module testing, manufacturing quality gates, and service bench diagnostics requiring both signaling and audio performance verification.