Auxiliary Controller
Description
Model: MI-789Our Auxiliary Controller (MI-789) provides extended capability for more complex measurement systems using legacy NSI-MI or VNA based systems. Besides the multi-frequency, multi-port acquisition capability, the MI-789 adds multi-beam control and triggering to the real-time data acquisition process. The beam steering interface includes two ports that can be connected to the user’s equipment to signal a change in beam state. This enables multi-beam measurements to be made on-the-fly in the same way that basic multi-frequency, multi-port measurements can be made.
The MI-789 also provides more control over the acquisition process, allowing the sequence of measurement conditions to be optimized for the fastest acquisition process. The order in which beams, channels, and frequencies are switched can be configured so that slower switching devices are changed less often. This effectively optimizes acquisition speed for the types of devices used in a given test.
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Specifications
Control Interfaces Description Control Interfaces 10/100BaseT Ethernet using TCP/IP VNA Interface 10/100BaseT Ethernet using TCP/IP Trigger Bus Interface Provides Four Differential Real-Time
Signals Programmable Pulse Width:Frequency Trigger
Measurement TriggerMaximum Range: 65.5 mS, Resolution: 1 uS
Maximum Range: 65.5 mS, Resolution: 1 uSBeam Steering Control Interfaces (2 ports) Data
Control Signals
Logic Level
DC Power16 bits, Parallel Output
Strobe Output, Input Acknowledgment
Differential LVTTL (RS-422 Compatible)
+/- 18 VDCProgrammable Timing: Strobe Out Pulse Width
Data to Strobe Delay (with Sync)
Data to Strobe Delay (no Sync)Maximum Range: 65.5 mS, Resolution: 1 uS
Maximum Range: 65.5 mS, Resolution: 1 uS
Maximum Range: 65.5 mS, Resolution: 1 uS
Multiplexer Interfaces (2 ports) Compatibility
Control Signals
Logic Level
DC PowerLegacy MI Multiplexers (MI-759 Series)
2 Bits per Port
Differential RS-422 Compatible
+/- 18 VDCAuxiliary BNC Interfaces (2) Control Signals Programmable as Input or Output Timing Latency Delay Hardware Input Response
Hardware Output Response
VNA Read after Sweep Complete1 uS max.
1 uS max.
8 mS typicaAC Power Requirements 90 -264 VAC, 47 - 63 Hz, 3.5A Environmental 0-95% Humidity, Non-Condensing
