Keithley 7073 8×12 Coaxial Matrix Card for Models 707A and 708A

The Keithley 7073 is an 8×12 coaxial matrix card engineered for RF and high-frequency signal routing in automated test equipment. It provides 96 crosspoints (1-pole Form A configuration) in a single card slot, delivering low-noise switching with 50Ω characteristic impedance and full signal shielding. The card integrates directly into Keithley 707A and 708A mainframes, offering high switching density with minimal crosstalk and contact potential.

## Technical Specifications

**Matrix Architecture**
• 8 rows × 12 columns (96 total crosspoints)
• 1-pole Form A relay configuration
• Relay drive current: 20mA per crosspoint
• Relay settling time: < 15ms

**Electrical Performance**
• Characteristic impedance: 50Ω
• Bandwidth: 30 MHz typical (50Ω load)
• Maximum signal: 200V, 1A, 30VA peak (resistive load)
• Contact potential: < 2µV per contact
• Offset current: < 200pA (10pA typical)
• Path resistance: < 0.5Ω initial; 80dB at 1MHz (50Ω load), > 65dB at 10MHz (50Ω load), > 55dB at 1MHz (1MΩ load)
• Insertion loss: < 0.5dB (50Ω source/load, 10MHz), 10¹²Ω, 80dB isolation at 1MHz minimizes crosstalk between adjacent channels
• Low contact potential (< 2µV) enables accurate low-level voltage measurements
• Quick-disconnect BNC connectors for rapid instrument connections
• Backplane disconnect jumpers provide flexible row configuration

## Typical Applications

RF signal switching, high-frequency automated test systems, precision analog switching, and low-level signal routing requiring controlled impedance and minimal crosstalk.

## Compatibility & Integration

Designed for Keithley Models 707A and 708A mainframes. Compatible with 707B and 708B mainframes.