The Rohde & Schwarz CTH100A is a portable radio test set engineered for field verification of analog FM transceiver systems in demanding outdoor environments. This battery-powered instrument measures transmitter power, frequency, and VSWR while generating calibrated RF signals for receiver testing. Its splashproof aluminum enclosure with shock-rated construction (30 g per MIL-PRF-28800F) and outdoor-optimized display enable rapid commissioning and maintenance tasks without requiring specialized expertise.
Technical Specifications
Transmitter Measurements
• Frequency Range: 30 MHz to 512 MHz
• Frequency Counter Resolution: 100 Hz
• Forward Power: 0.1 W to 50 W
• Reflected Power: 0.1 W to 50 W
• VSWR: Calculated from forward and reflected power measurements
• Power Measurement Uncertainty: ±0.8 dB at both connectors (frequencies below 200 MHz)
• Absolute Maximum Input Power: 100 W (CW or FM constant envelope)
Receiver Testing
• RF Output Level (Below 100 MHz): −97 dBm to −120 dBm
• RF Output Level (Above 100 MHz): −11 dBm to −134 dBm
• Channel Spacing: Fixed 5 MHz or user-defined frequency
• FM Deviation Measurement: Post-transmitter test analysis
• Squelch and Demodulation Testing: Supported
Environmental Performance
• Shock Specification: 30 g spectrum per MIL-PRF-28800F
• Vibration: 5 Hz to 150 Hz at 0.15 mm amplitude constant; 55 Hz to 150 Hz at 0.5 g constant (IEC 60068-2-6)
• Enclosure: Splashproof with sealed battery compartment and keypad
– Key Features
• Compact, field-portable design with aluminum enclosure and rubber-reinforced corners
• Direct connection to DUT with immediate transmitter and receiver measurements
• Outdoor-readable display for operation across variable lighting conditions
• Battery-powered operation for extended field service without external infrastructure
– Typical Applications
• Land mobile radio (LMR) system commissioning and maintenance
• Two-way radio transceiver qualification and performance verification
• Field service measurements in remote and adverse weather conditions
• Rapid frequency and power compliance checks during deployment
– Compatibility & Integration
Measures analog FM radio systems with constant-envelope modulation. Tests transceiver units via direct RF connection with forward and reflected power measurement through dual connectors.
