The Rohde & Schwarz NAS-Z7 Insertion Unit is a directional power measurement component engineered for GSM900/1800/1900 mobile communication systems. It connects to the NAS Directional Power Meter to deliver accurate forward power, reflected power, and Standing Wave Ratio (SWR) measurements across the specified frequency bands. The unit employs a signal-controlled circuit that suppresses transient overshoots in TDMA signal bursts, enabling precise Peak Envelope Power (PEP) measurements compliant with GSM specifications.
Technical Specifications
• Frequency Range (Nominal): 890 to 960 MHz and 1710 to 1990 MHz
• Frequency Range (Usable): 850 MHz to 2000 MHz
• Power Measurement Range: 0.01 W to 30 W
• Impedance: 50 Ω
• Insertion Loss: <0.2 dB
• Connector: N-type female input
• Dimensions: 55 × 120 × 90 mm
• Weight: 0.7 kg
– Key Features
• Signal-controlled circuit mitigates transient overshoots in signal bursts
• Optimized for clocked TDMA signals used in digital mobile transmission
• Measures forward power, reflected power, and SWR simultaneously
• Direct insertion into NAS meter or remote measurement via 1.5 m cable
• Integrated self-test and automatic calibration functionality
• Automatic power range selection
• Battery operation capable
• Automatic power-off feature
– Typical Applications
• Mobile station transmitter testing in time-slot allocated systems
• Peak Envelope Power verification for GSM network compliance
• RF transmission line SWR assessment
• Digital mobile radio power measurements
• Cordless telephone system characterization
– Compatibility & Integration
The NAS-Z7 is purpose-designed for the Rohde & Schwarz NAS Directional Power Meter. Connection is via N-type female connector with optional 1.5 m cable for remote mounting configurations.
