The NMVCH AXIe-0 Down module is a mezzanine module carrier made in the AXIe-0 standard. The module ensures the functioning of various modules installed in it, made in the form of double mezzanines. The number of slots in the module is one.
Main function
- radio frequency spectrum Converter
- accumulates a large amount of information in the form of binary codes coming from the mezzanine at high input frequencies and a large number of channels, when it is not possible to process data in real time.
The NMVCH AXIe-0 Down module is used as part of information measurement systems based on the AXIe-0 backbone and is installed in the AXIe 0 standard chassis on the seats of the instrument modules.
A single mezzanine can be installed in the module, compatible with the module via the exchange and management interface, which can work for input, output, or data input and output simultaneously.
It is allowed to install different types of functional mezzanines with different clock frequencies in the module.
In the mode of information output to the mezzanine of the NMVCH AXIe-0 Down module provides output of data recorded in its internal memory at specified time intervals in a single time grid to the specified mezzanine.
The module performs batch buffering of data from heterogeneous mezzanines with data binding to a single time grid and provides access to the current (received at the last time) measurement results on any channel.
The exchange process with the mezzanine can be started:
- programmatically;
- by a programmatically selected signal (any of 12) of the trigger bus signals coming from the AXIe trunk (external trigger mode);
- by the signal "start NM" from the mezzanine (asynchronous operation mode).
The module supports exchange with the mezzanine via two interfaces:
- management interface - used for configuring and monitoring the state of the mezzanine;
- data interface - used for reading the measurement results of the mezzanine in RAM and output data arrays from RAM to the output mezzanine.
The module provides verification of the main technical characteristics in the self-monitoring mode
The parameters of the input "RF INPUT»:
|
Output parameters "RF OUTPUT":
|
Work in two program-defined modes:
|
In the "forward pass" mode, the bandwidth level is -3 dB from 0.1 to 450 MHz |
| In the "frequency transfer" mode, the bandwidth at the level of -3 dB relative to the Central frequency is not less than 150 MHz | The center frequency of the input signal is set in the range from 50 to 10,000 MHz in 50 MHz increments |
| The center frequency of the output signal is set in the range from 50 to 400 MHz in 25 MHz increments | The level of harmonic distortion when the input signal power is 0 dB and the transmission coefficient is 0 dB no more than -30 dB in the frequency range from 50 to 400 MHz |
| The level of inharmonic distortion with an input signal power of 0 dB and a transmission coefficient of 0 dB no more than minus 40 DBN in the frequency range from 50 to 400 MHz | Rated output power when the transmission coefficient is reduced by 1 dB (compression point R1db) at least 5 dBm |
| The intersection point of third-order intermodulation components (OIP3) is not less than 15 dBm | Spectral power density of the noise output of the module, measured in the range up to 1 GHz, no more than -120 dB / Hz |
|
limits of permissible absolute error in setting the module transmission coefficient in the frequency range from 10 MHz to 10 GHz А = ± (15∙10-6∙|K|∙F+0,04∙|ΔF|+1) dB, where |К| – absolute value of the programmed transmission coefficient in decibels in the range from 0 to 20 dB; F – center output frequency value from 50 to 400 MHz in 25 MHz increments; |ΔF| – absolute value of detuning from the Central output frequency F in megahertz in the range from 0 to 75 MHz. |
The transmission rate is set in the range from -20 to 0 dB in 0.5 dB increments |
Program selection of the 100 MHz reference frequency source:
|
|
Long-term relative frequency instability of the internal reference oscillator (without frequency adjustment):
|
|
| Software adjustment of the reference frequency within ± (5∙10-7) | |
|
Note the absolute error in setting the transmission coefficient is provided after the module is warmed up for 45 minutes. Frequency instability is provided after the module is warmed up for 45 minutes. |
|
| Output of the reference frequency signal from the internal generator to the output connector "100 MHz OUT" at the program command |
Parameters of the reference frequency output " 100 MHz OUT»:
|
Input parameters of the reference frequency " 100 MHz IN»:
|
Total spectral power density of the module phase noise at a carrier frequency of 1 GHz no more:
|
Characteristics of the mezzanine data interface:
|
Characteristics of the mezzanine management interface:
|
| Access to the mezzanine can be single or periodic (set programmatically) | |
| The type of "START" signal on the data interface is selected programmatically - either a 190 ns pulse or a constant level during the entire exchange time | |
The module has two methods for monitoring exchange processes with mezzanines:
|
|
|
Control the structure of the mezzanine frame as follows: a bit (33rd) is added to the data bus, the content of which is "1" for the first word of the frame and "0" for subsequent words of the frame. If these conditions are not met, an error flag appears and an interrupt request may be issued |
|
|
Control by the "DATA_VALID" and "EMPTY" signals as follows: the device's mezzanine is a FIFO-type RAM, so when reading from the mezzanine, the presence of data in the mezzanine's FIFO is monitored (the "DATA_VALID" = "0" signal), and when writing to the mezzanine, the absence of data is monitored (the EMPTY = "0"signal). If these conditions are not met, an error flag appears and an interrupt request may be issued |
Synchronous and asynchronous exchange mode, in which the time of reading and writing information when exchanging with the mezzanine is determined by the mezzanine itself using service signals received by the module from the mezzanine |
| Ability to read current data (measurement results, survey) with timestamps at any time without interrupting the device operation (measurement, survey) and with a delay of no more than one measurement period | Exchange with the mezzanine using SDRAM |
Program selection of the reference frequency source for its operation and the operation of the mezzanine from three possible options:
|
The base interface of the AXIe module trunk conforms to the IEEE 802.3 10/100 Base-t standard. IP address assignment modes – DHCP, AutoIP, static (default 192.168.1.100) |
| Module ID – «INFORMTEST, UNMBASE» | |
The module provides the following mezzanine supply voltages and limiting currents:
|
Dimensions- 30×350×318.9 mm |
| The power consumed by the module with the installed mezzanine does not exceed 50 W | |
| Module supply voltage - from -53 to -45 V | |
Current consumed by the power supply circuit:
|
Module weight-3.2 kg |