The HP/Agilent 70903A is an IF section module for the HP 70000 Modular Measurement System that processes intermediate frequency signals with selectable resolution bandwidths from 100 kHz to 3 MHz. It delivers calibrated logging amplifier outputs and a 21.4 MHz IF signal, enabling precise amplitude measurements and external instrument connectivity for spectrum analysis, signal demodulation, and waveform capture.
Technical Specifications
• Resolution Bandwidth: 100 kHz to 3 MHz in 10% increments
• Bandwidth Selectivity: 1, 3, and 10 sequence options available
• Video Bandwidth: 300 Hz to 3 MHz, ±20% accuracy (characteristic)
• IF Output Frequency: 21.4 MHz
• Selectivity Ratio (-60 dB/-3 dB): Less than 16:1 across 10 kHz to 3 MHz range
• Module Width: 1/8 width in HP 70000 mainframe
– Key Features
• Calibrated logging amplifier for accurate amplitude measurements
• Multiple video and IF output connectors for external instrument integration
• SMB connectors for 21.4 MHz IN and OUT; BNC connectors for auxiliary video and IF outputs
• Typical video output: 0–2 V (SMB); auxiliary video output: 0–1 V (BNC)
• Auxiliary IF output: approximately −15 dBm (BNC)
• Hex-nut module latch with 8 mm hex-ball driver for secure mainframe mounting
• Recyclable housing materials
– Typical Applications
• Multi-stage IF filtering and signal conditioning within modular measurement systems
• Cascaded configurations with additional IF sections for enhanced selectivity
• Signal routing to external demodulators, digitizers, and oscilloscopes
• Spectrum analysis with variable resolution and measurement speed trade-off control
– Compatibility & Integration
Designed for direct integration into the HP 70000 Series MMS as a slave module. Accepts 21.4 MHz input at nominal −5 dBm from RF sections and external mixer interface modules. Operates under control of system master modules such as the HP 70900A Local Oscillator. Supports cascading with modules including the HP 70902A for complex signal processing chains.
