CN105353213B

CN105353213B - A kind of wave complete machine gain distribution method of spectrum analyzer

Info

Publication number: CN105353213B
Application number: CN201510938962.6A
Authority: CN
Inventors: 马风军; 邓旭亮; 任水生
Original assignee: CETC 41 Institute
Current assignee: CETC 41 Institute
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2018-02-06
Anticipated expiration: 2035-12-15
Also published as: CN105353213A

Abstract

The invention discloses a kind of wave complete machine gain distribution method of spectrum analyzer, step are as follows：Spectrum analyzer radio frequency and the gain unit in intermediate-frequency circuit are analyzed, the maximum gain that analysis gain unit can distribute, are the gain that each gain unit sets needs to distribute according to the maximum gain that can be distributed；The gain distributed as needed is configured to first gain unit；After being configured gain unit, start to carry out gain data correction analysis to set gain unit；Determine that gain and decision to gain unit itself distribution pass to the new gain error of next gain unit after being analyzed；Judge whether that also gain unit is not provided with, if just setting next gain unit, return to previous step；If it is not, terminate.It is analyzed the relation between gain to be allocated and hardware gain resource, as far as possible distributes gain and realized by hardware, avoid gain compression, improve measurement accuracy by the distribution of each gain unit of dynamic corrections.

Description

A kind of wave complete machine gain distribution method of spectrum analyzer

Technical field

The present invention relates to a kind of wave complete machine gain distribution method of spectrum analyzer.

Background technology

Spectrum analyzer is in order in interior measurement signal amplitude in a big way, need to being directed to different signal amplitude measurement requests Adjust internal gain distribution, to reach optimum measurement state, therefore it is internal radio frequency and intermediate-frequency circuit have it is multiple it is different, can The gain unit of regulation is used to realize that gain distributes.

Conventional gain allocation algorithm is a kind of block form algorithm, obtains the parameter of each gain unit by calibration, distributes When according to these parameter one-time calculations go out the gain that each gain unit needs to distribute, then carry out the hard of each gain unit Part is set.The advantages of this method is the control that each gain unit thinks of oneself only, each other without coupling, algorithm and control All very simple is easily achieved；Shortcoming is the failure to make full use of hardware circuit resource, and gain distribution error may be larger, and works as When hardware gain distribution error is larger, gain compression may occur under some critical conditions, this can directly result in measuring error. An improvement to this scheme is to improve measurement accuracy using software gain compensation, but this method can not improve gain compression.

Prior art technical problem to be solved includes：

1 provides a kind of method that awave, gain distributes sustainable feedback；

2 improving costs are low, few to original software scenario change amount；

3 can realize the optimum utilization of hardware gain unit, and measurement accuracy is good；Interface is simply clear, has well Durability.

The content of the invention

The purpose of the present invention is exactly to solve the above problems, there is provided the wave complete machine gain of a kind of spectrum analyzer point Method of completing the square, it analyzes the relation between gain to be allocated and hardware gain resource by the distribution of each gain unit of dynamic corrections, Gain is distributed as far as possible and realized by hardware, avoids gain compression, improves measurement accuracy.

To achieve these goals, the present invention adopts the following technical scheme that：

A kind of wave complete machine gain distribution method of spectrum analyzer, comprises the following steps：

Step (1)：Spectrum analyzer radio frequency and the gain unit in intermediate-frequency circuit are analyzed, analyze gain unit energy The maximum gain enough distributed, it is the gain that each gain unit sets needs to distribute according to the maximum gain that can be distributed；

Step (2)：After being configured first gain unit, start to increase first set gain unit Beneficial data correction analysis；Determine that gain and decision to the distribution of first gain unit itself pass to next increasing after being analyzed The new gain error of beneficial unit；

Step (3)：Judge whether that also gain unit is not provided with, if just setting next gain unit, return to step (2)；If it is not, terminate.

The maximum gain that the step (1) analysis gain unit can distribute, be because the ability of each gain unit not Together, prevent each gain unit distribution from gross differences occur.

The step of step (2) is：

The gain that judge currently allocated gain error needs to distribute with step (1) adds and whether exceeds this gain unit The maximum gain that can be distributed；

If exceeding, it is the maximum gain that this gain unit can distribute to determine the gain to gain unit itself distribution, And gain error is modified to the first new gain error；First new gain error determines to pass to next gain unit New gain error；

First new gain error=(currently allocated gain error+step (1) needs the gain distributed)-this gain The maximum gain that unit can distribute；

If without departing from, determine distribution to gain unit itself gain be：Currently allocated gain error and step Suddenly (1) need the gain that distributes add and；And gain error is modified to the second new gain error；Second new gain error is Decision passes to the new gain error of next gain unit；

The gain that second new gain error=this gain unit actually distributes-(currently allocated gain error+step (1) gain distributed is needed).

Beneficial effects of the present invention：

The present invention is on the basis of existing gain distribution method, and by the distribution of each gain unit of dynamic corrections, analysis is treated The relation distributed between gain and hardware gain resource, gain is distributed as far as possible and realized by hardware, avoids gain compression, is improved Measurement accuracy.

The present invention uses C Plus Plus and Object-Oriented Design, passes through unified gain allocation algorithm interface, both clear letter It is clean and maintain flexibility during in face of complex hardware circuit, reach multiplexing effect.

1) it is few to original gain distribution control flow change, it need to only increase gain distribution feedback interface；

2) optimum utilization of gain unit can be realized, measurement accuracy is good；Interface is simply clear, easy to use, and has There is good durability.

Brief description of the drawings

Fig. 1 is wave gain allocation flow；

Fig. 2 is wave gain allocation flow；

Fig. 3 is gain data correction analysis flow.

Embodiment

The invention will be further described with embodiment below in conjunction with the accompanying drawings.

1. gain allocation flow designs

The key of gain distribution is to reduce error caused by each gain distribution in time, and this needs gain data amendment Analytical technology, the technology are specifically completed during hardware setting, and its implementation process is as shown in Figure 1.

After the hardware cell for needing gain to distribute to one every time is configured, pass through a unified interface interchange gain Data correction analysis module, the result that gain distributes is passed into gain data correction analysis module and analyzed, gain data Correction analysis module simultaneously return analysis after needed for gain distribution amendment data.Each gain unit is involved in the error of gain Amendment, but the comprehensive analysis with other gain units is not involved in, that is, independence is still kept between each other, design remains unchanged simple Easily.

By distribution->Correction analysis->Distribution->The such method of correction analysis ..., gain error as wave not Break and moved ahead between each gain unit, expanded all the time in continuous amendment but not accumulation.

As shown in Fig. 2 a kind of wave complete machine gain distribution method of spectrum analyzer, comprises the following steps：

Step (1)：Spectrum analyzer radio frequency and the gain unit in intermediate-frequency circuit are analyzed, analyze gain unit The maximum gain that can be distributed, it is the gain that each gain unit sets needs to distribute according to maximum gain；

Step (3)：Judge whether that also gain unit is not provided with, if just setting next gain unit, return to step (2)；If otherwise carrying out software gain-boosted op amp, terminate.

2. gain data correction analysis

When carrying out gain data correction analysis every time, the actual gain data distributed of current gain unit can be all provided, Algorithm is as shown in Figure 3：

The algorithm needs 3 parameters, represents currently allocated gain error respectively, is this time initially required this gain unit The gain of distribution and this gain unit allow the maximum gain of distribution.

First according to allocated gain error, the gain for this time needing to distribute is calculated, gain distribution is passed through this as far as possible The hardware of gain unit is realized, prevents error accumulation；

Determine that ideally this gain unit needs the gain distributed further according to the ability of this gain unit permission；By Logical in the data of gain unit is centrifugal pump, so error is had between the gain that the gain and needs that finally distribute distribute, this Individual new error will be recorded, and be passed to next gain unit ... and be so modified successively, until all gain units Assigning process is involved in, hardware circuit state now is exactly optimum measurement state.

This module interface is clear, as long as repeating to call the once interface after setting every time, durability is good, to original soft The modification of part code is also clearly simple, and the module carries out simple operation using three floating numbers, and run time is relative to hard Part sets and can be ignored.

Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.

Claims

1. a kind of wave complete machine gain distribution method of spectrum analyzer, it is characterized in that, comprise the following steps：

Step (1)：Spectrum analyzer radio frequency and the gain unit in intermediate-frequency circuit are analyzed, analysis gain unit can divide The maximum gain matched somebody with somebody, it is the gain that each gain unit sets needs to distribute according to the maximum gain that can be distributed；

Step (2)：After being configured first gain unit, start to carry out gain number to first set gain unit According to correction analysis；Determine that gain and decision to the distribution of first gain unit itself pass to next gain list after being analyzed The new gain error of member；

Step (3)：Judge whether that also gain unit is not provided with, if just setting next gain unit, return to step (2)； If it is not, terminate.

2. a kind of wave complete machine gain distribution method of spectrum analyzer as claimed in claim 1, it is characterized in that, the step Suddenly the maximum gain that (1) analysis gain unit can distribute, it is because the ability of each gain unit is different, prevents each gain There are gross differences in unit distribution.

3. a kind of wave complete machine gain distribution method of spectrum analyzer as claimed in claim 1, it is characterized in that, the step Suddenly the step of (2) are：

Whether the gain that judge currently allocated gain error needs to distribute with step (1) adds and can divide beyond this gain unit The maximum gain matched somebody with somebody；

If exceeding, it is the maximum gain that this gain unit can distribute to determine the gain to gain unit itself distribution, and will Gain error is modified to the first new gain error；First new gain error is to determine to pass to the new of next gain unit Gain error；

First new gain error=(currently allocated gain error+step (1) needs the gain distributed)-this gain unit The maximum gain that can be distributed.

4. a kind of wave complete machine gain distribution method of spectrum analyzer as claimed in claim 3, it is characterized in that,

If without departing from, determine distribution to gain unit itself gain be：Currently allocated gain error and step (1) The gain for needing to distribute add and；And gain error is modified to the second new gain error；Second new gain error determines Pass to the new gain error of next gain unit；

The gain that second new gain error=this gain unit actually distributes-(currently allocated gain error+step (1) Need the gain distributed).