The decision to upgrade, of course, depends on what you hope to gain through the upgrade. One of the main differences is that the 37000D series supports LAN communication, whereas the 37000C does not. The 37000D has better system dynamic range than the 37000C The 37000D has new measurements not available on the 37000C: Mixer Measurements: Directly measure frequency translation devices utilizing the NxN multiple device solution utility. The NxN application provides an accurate method of measuring frequency translated devices, such as mixers, providing both magnitude and phase information and the unique ability to measure absolute phase (group) delay. By measuring the response characteristics of device pairs, the Lightning VNA will solve for device pairs and de-embed the characteristics. The NxN application module for mixer measurements includes capabilities for characterizing the IF path of frequency translation device measurements. The result is a real-time display of the de-embedding characteristics of the device under test. Embedding/De-embedding: Manipulate S2P networks to automatically remove fixtures and devices or add effects of a known structure. De-embedding is generally used for removal of test fixture contributions and other S2P networks from measurements. The de-embedding can be applied to a calibration and then stored for future measurements. Similarly, the Embedding function can be used to simulate matching circuits for optimizing amplifier designs or simply adding effects of a known structure to a measurement.
The part number of the Basic Measurement Software for the 37000D VNA’s is 2300-500. Please contact your local Anritsu Service Center for assistance.
S11 Forward Reflection represents the measurement in which the signal leaves port 1 and is reflected back to port 1. S21 Forward Transmission represents the measurement in which the signal leaves port 1 and is transmitted to port 2. S12 Reverse Transmission represents the measurement in which the signal leaves port 2 and is transmitted to port 1. S22 Reverse Reflection represents the measurement in which the signal leaves port 2 and is reflected back to port 2.
The display is thin film transisor (TFT) LCD
Security Procedures for the 37XXX VNAs: This note describes the precautions to take when using the Anritsu Lightning 37XXX VNAs in a secure environment. There are different locations in the CPU which are used to store different parameters of the VNA, and an understanding of the contents of these locations and the procedures to clear them is important when working in secure environments. The following locations in the processor are used to store data and other parameters. Memory Description DRAM Running firmware code, Application downloads and drives. Contents are completely erased when system power is turned off. SRAM Stores last front panel set-up, calibration data tables, and state storage. Also stores data when user selects Save front panel set up and cal date on memory. Contents are saved even after power off, since it is backed up by a battery. System will have to be reset to erase data (see erasing memory). CPU Flash Contains boot up code used to run the VNA firmware upon boot up of the instrument. This location doesn't save any user data and is not accessible to the user. Memory contents cannot be removed by turning power off or resetting the instrument. But there is no user accessible data on the CPU flash. Hard Disk Saves user files, including: calibrations, S2p data, test data, graphical data, instrument states, set-up parameters. Memory cannot be deleted by turning power off or resetting the instrument. The hard disk will have to be formatted to erase all the contents. This can be done through the front panel. Erasing Memory To erase instrument memory in a secure environment where the VNA may be shared between different users. Different Reset Levels 1) Pressing the key on the front panel: defaults current state, erases memory location (SRAM) that saves current set-up and calibration data and clears trace memory 2) Pressing the key and the key: defaults current state, erases the memory location (SRAM) that saves current set-up and calibration data and clears trace memory. In addition, it also clears internal memories (memory 1-10) that are used to store set-up and cal data. 3)Pressing the key and the key: Similar to and in addition also clears reserved parameters. This is the highest level of system reset. Reserved parameters include GPIB addresses, Coax/WG cal kit info, test set configuration (including millimeter-wave, panorama), external source configuration, receiver mode, output (printer), DUT protection, adapter removal info, and color configuration. Erase is accomplished by writing "10101010"'s into these memory locations which meet the DoD wipe memory routine (DoD 5220.22-M). NOTE: For highly secure environments, it is recommended that the hard drive be removed using option 4A; and the system should be operated using an external hard drive. 3700/4A - Option 4A, External SCSI-2 Hard Disk Drive compatibility (Internal HDD removed, External SCSI-2 PCMCIA drive ordered separately). In addition, the following SCSI drives are available for use with option 4A: 2000-1397 Lightning SCSI-2 External PCMCIA Drive (for use in the United States) Includes: PCMCIA Drive with Power Supply, SCSI-2 Interface Cable, and pre-programmed Memory Card. (Requires Option 4A installed in 37000 VNA) 2000-1398 Lightning SCSI-2 External PCMCIA Drive (for use in Europe, except United Kingdom) 2000-1399 Lightning SCSI-2 External PCMCIA Drive (for use in the United Kingdom) 2000-1400 Lightning SCSI-2 External PCMCIA Drive (for use in Australia) The external hard drive can remain in the secure area or be destroyed (disintegrated, incinerated, pulverized, shredded or melted). In a nonsecure environment, a spare external hard drive can be used.
It is used to connect to external peripherals and/or instrumentation for network analyzer controlled operations (e.g. plotters, frequency counters, frequency synthesizers and power meters).
Ten front panel states (no calibration) can be stored and recalled from non-volatile memory locations. The current front panel setup is automatically stored in non-volatile memory at instrument power down. When power is applied, the instrument returns to its last front panel setup.
The suggested calibration interval is 1 year however the customer's application of the product may require a different calibration interval.
In order to restore the 37000D to factory default simply push the "Default Program" button, then the "0" button. This will restore the system to factory default settings including clearing the calibration kit information. The Calibration Kit will need to be reloaded.
Temperature: <5 x 10-E9 over 0 deg. to 55 deg. Celsius range Aging: <1 x 10-E9/day
The Fast CW is an ideal mode of operation to attain rapid data over GPIB. To achieve a fast measurement rate, the display is not updated and only the raw S-parameter or user-defined parameter of the active channel is measured.
It is used to connect to an external controller for use in remote programming of the network analyzer. The address can be set from the front panel and can range from 1 to 30.
External TTL triggering for 37000D series VNA measurement. 10 K ohm input impedance, BNC female.
It is 0.5 GB, used to store and recall measurement and calibration data and front-panel setups. File names can be 1 to 8 characters long, and must begin with a character, not a number. Extensions are automatically assigned.
The power requirements are: 85-240 volts, 48-63 Hz. The VNA automatically senses the voltage line present.
It is apparent that something has failed in the down converter of the signal source of your VNA. If you look at the block diagrams for your VNA, you will see that the VNA has only one internal signal source that is used for S parameter measurements. This signal source is a 2 - 20 GHz YIG oscillator that is used direct with filters for frequencies above 2 GHz. Below 2 GHz, this source is down converted with a fixed frequency oscillator, filtered and amplified. It is this down converter assembly that has apparently failed in your VNA based on the symptoms you described. There is no capability to substitute an alternative source to make S parameter measurements. The best course of action is to send your VNA to an Anritsu service center for repair.
A full 2 path 12 term calibration is needed in order to see all 4 S parameters in the S2P file format.
Yes, calibration coefficients for non-Anritsu calibration kits can be entered manually through the user defined connector type. During the calibration process, the 37000D will prompt the user for a connector type. If the user selects "User Defined," the 37000D will then allow the user to enter the calibration coefficients manually.
It supports Linear, CW, Marker, or N-Discrete point sweeps.
It is +/- 50 volt input for displaying external signals on the LCD, the connector is BNC female.
