The Marconi IFR Aeroflex CPM20 is a portable, field-deployable combination instrument that integrates frequency counter, power meter, and digital voltmeter functions into a single ruggedized unit. Operating from 10 MHz to 20 GHz, it delivers rapid frequency measurements with user-selectable resolution down to 1 Hz, precise power analysis across -65 dBm to +44 dBm (0.31 nW to 25 W), and DC voltage measurement capability. The 4.9 kg package runs on an internal rechargeable battery for 3 hours continuous operation, making it ideal for RF/microwave commissioning, maintenance, and troubleshooting in the field.
Technical Specifications
Frequency Counter
• Range: 10 MHz to 20 GHz
• Sensitivity: -20 dBm typical (below 20 MHz)
• Resolution: User selectable from 1 Hz to 1 MHz
• Temperature stability: Better than ±5 in 10⁸ (0 to 50°C with standard DTCXO)
• Measurement time: 1 Hz resolution
• FM tolerance: 20 MHz peak-to-peak (>1 kHz rate)
• AM tolerance: 20 kHz rate
• Amplitude discrimination: 20 dB for signals >400 MHz
• Pass/fail limits function included
Power Meter
• Frequency range: 30 kHz to 46 GHz (sensor dependent)
• Power range: -65 dBm to +44 dBm (0.31 nW to 25 W, sensor dependent)
• Resolution: 4 digits
• Units: dBm, dBW, pW, nW, µW, mW, W, kW
• Supported sensors: 6910, 6920, 6930, 6930 opt.2
• Auto-calibration against 0 dBm reference at 50 MHz
• Auto-zero function
• Analog meter display, pass/fail limits, dB rel, power offset, and duty cycle modes
Digital Voltmeter
• Range: 0 to 10 VDC
• Accuracy: 2.5%
• Resolution: 10 mV
• Application: AGC voltage measurement
General
• Display: Transflective LCD with integral backlight
• Power supply: Rechargeable battery, AC adapter, or 10 V to 28 V DC vehicle supply
• Battery life: 3 hours continuous
• Weight: 4.9 kg (10.8 lb)
• Operating temperature: 0 to +45°C
• EMC: EEC Council Directive compliant
– Key Features
• Three-function integration eliminates need for multiple instruments
• Ruggedized carrying case with field-hardened construction
• Fast frequency measurements with selectable resolution and limits checking
• Wide power measurement range with automatic calibration and offset capability
• Analog meter for real-time power tuning and adjustment
– Typical Applications
• Digital microwave radio installation and commissioning
• Field maintenance of communication systems
• Power level verification and frequency validation
• Receiver AGC circuit monitoring
– Compatibility & Integration
Works with Aeroflex 6900 series power sensors including models 6910, 6920, 6930, and 6930 opt.2 for operation across 30 kHz to 46 GHz.
