CN105785084A - System for displaying channel parameters on signal generator - Google Patents
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Abstract
The invention discloses a system for displaying channel parameters on a signal generator, wherein the signal generator at least comprises one signal channel and a display screen. The system is characterized in that the system comprises a channel setting module which sets a channel parameter for the signal generator, a state setting module which converts the channel parameter into a code flag bit according to a encoding rule, a storage module which stores the code flag bit in a predetermined storage area, a parameter acquisition module which obtains code flag bits sequentially according to the predetermined storage area, a decoding conversion module which decodes the code flag bit into an identifiable character string according to a decoding rule corresponding to the encoding rule, and a state parameter rendering module which renders the character string in an independent fixed display area on a display screen, wherein the independent fixed display area is independent from other display areas and is displayed at any one display interface of the signal generator. According to the system of the invention, the channel parameter is quickly and accurately converted into the identifiable character string, and the query of real-time channel parameters can be facilitated for users.
Description
Technical field
The present invention relates to electric variable field tests, particularly relate to a kind of system of display channel parameter on signal generator.
Background technology
Signal generator, as common driving source, has been widely used scientific research and industrial engineering field.One typical case's application of signal generator is exactly simulate various signal in the lab, and as the input stimulus of circuit under test and system, the various performance indications for test circuit under test and system provide simulated environment.Traditional signal generator is divided into four big classes by its signal waveform: (1) sinusoidal signal generator: be mainly used in measuring circuit and the frequency characteristic of system, non-linear distortion, gain and sensitivity etc.；(2) function (waveform) signal generator: produce some specific periodically time function waveform (sine wave, square wave, triangular wave, sawtooth waveforms and impulse wave) signal, except being available for communication, instrument and automatic control system test, it is also widely used in other non-field of electric measurement；(3) pulse signal generator: produce the generator of width, amplitude and the adjustable rectangular pulse of repetition rate, can be used for the transient response of p-wire sexual system, or tests the performance of radar, multichannel communication multiple telecommunication and other pulse digit systems as analogue signal；(4) random signal generator: can be used for the noise simulating in actual operating conditions, introduces the stochastic signal of generation and treats examining system, thus measuring systematic function；The additional known noise Signals & Systems internal noise of system under test (SUT) can to compare to measure noise coefficient；Sinusoidal or pulse signal can also be replaced, to measure system dynamic characteristic etc. with stochastic signal.
Signal generator can be widely used in the fields such as electronics research and development, maintenance, measurement, calibration.In the use procedure of signal generator, the channel parameters such as the carrier type of each passage, modulation waveform, output impedance, need be shown to user and facilitate user to check, therefore current most signal generator all has channel parameters display function.
With reference to Fig. 1, it is shown that the mode of a kind of signal generator display channel parameter of prior art, in the main interface 100 of signal generator, square frame 101 shows and square frame 102 shows the channel parameters of passage 1 channel parameters of passage 2.
With reference to Fig. 2, it is shown that the mode of prior art another kind signal generator display channel parameter, in the main interface 200 of signal generator, square frame 201 shows and square frame 202 shows the channel parameters of passage 1 channel parameters of passage 2.Fig. 3 is the schematic diagram that the signal generator shown in Fig. 2 enters into storage assistant interface.
In prior art, which kind of signal generator all only displays when display channel parameter in two zonules at main interface, user cannot carry out the inquiry of channel parameters in real time, and prior art is after entering into the assistant interface of signal generator, will no longer be shown channel parameters information, user cannot carry out the inquiry of channel parameters in real time, lacks real-time.Prior art lacks the definition that shows of key message, information show unintelligible, do not highlight.
Summary of the invention
It is an object of the invention to, solve prior art signal generator display channel parameter, lack the definition that key message shows, information shows technical problem that is unintelligible and that lack real-time, it is provided that a kind of system of display channel parameter on signal generator.
A kind of system of display channel parameter on signal generator, described signal generator at least includes a signalling channel and a display screen, including with lower module:
Path setting module, for setting a channel parameters of described signal generator；
Status set module, for according to a coding rule, being converted to a coding maker position by described channel parameters；
Memory module, for storing described coding maker position in predetermined memory block；
Parameter acquisition module, for sequentially obtaining described coding maker position according to described predetermined memory block；
Decoding modular converter, for according to the decoding rule corresponding with described coding rule, being decoded as discernible character string by described coding maker position；
State parameter drafting module, on described display screen independent of, in the independent fixed display area of other viewing areas, drawing described character string, described independent fixed display area is shown in arbitrary display interface of described signal generator.
The system of the present invention, the channel parameters of setting is converted to recognizable character string rapidly and accurately, utilizing the independent fixed display area independent of other viewing areas to draw channel parameters, independent fixed display area is shown in arbitrary display interface of signal generator simultaneously.Make to enter into the assistant interface of signal generator or other any interfaces, can independent display channel parameter, user can carry out the inquiry of channel parameters in real time.
Illustrate as one, also include passage and open judge module, for judging to be set whether passage is opened, when judge described set passage unlatching time, in described independent fixed display area, with the color drafting described character string identical with current channel color.
As one illustrate, when judge described set pathway closure time, in described independent fixed display area, be different from described current channel color drafting described character string.
When passage is opened, drawing described character string with the color identical with current channel color, during pathway closure, the color to be different from current channel draws described character string, it is possible to make user clearly identify the channel status of different passage rapidly, it is simple to observe.
Illustrate as one, in described independent fixed display area, be arranged side by side the same channels parameter of multiple described signalling channel.
Illustrate as one, when one new channel parameters of described path setting module settings, when described new channel parameters is decoded as new recognizable character string by described decoding modular converter, described state parameter drafting module, before drawing described new recognizable character string, first empties described independent fixed display area.
Illustrate as one, described decoding modular converter, for regular according to the decoding corresponding with described coding rule, and according to the current system language of described signal generator, described channel parameters is decoded as the discernible character string represented with current system language.
Illustrate as one, also include,
Channel status judge module, is used for judging that a signalling channel is on or off；
Channel status drafting module, during for judging that described current channel is opened, center position area in described independent fixed display area, draw a channel status with the color identical with current channel color and open mark, judge when described current channel is closed, center position area in described independent fixed display area, the color to be different from described current channel is drawn a channel status and is closed mark.
In independent fixed display area both sides with the form display channel parameter of character string, in center position area display channel state, channel status and channel parameters are shown side by side, channel status does not also disappear with entering signal generator assistant interface so that user can become apparent from, pay close attention to the channel status of whole signal generator and all channel parameters clearly in real time.
Accompanying drawing explanation
Fig. 1 is prior art one signal generator display channel bound of parameter face schematic diagram；
Fig. 2 is prior art another kind signal generator display channel bound of parameter face schematic diagram；
Fig. 3 is the interface schematic diagram that the signal generator shown in Fig. 2 enters into storage assistant interface；
Fig. 4 is a kind of method flow diagram of display channel parameter on signal generator of the present invention；
Fig. 5 is a kind of display channel bound of parameter face schematic diagram on signal generator of the preferred embodiment of the present invention；
Fig. 6 is a kind of display channel bound of parameter face schematic diagram on signal generator of another preferred embodiment of the present invention；
Fig. 7 is the partial enlarged drawing of center position area, Fig. 6 interface；
Fig. 8 is the method flow diagram that the preferred embodiment of the present invention draws center position area；
Fig. 9 is a kind of system block diagram of display channel parameter on signal generator of the preferred embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are further described in detail.
With reference to Fig. 4, in conjunction with reference to Fig. 5, a kind of method of display channel parameter on signal generator, described signal generator at least includes a signalling channel and a display screen 500, comprises the following steps:
Path setting step S101, sets a channel parameters of described signal generator；
Channel parameters can be set by the button on signal generator keyboard, it is also possible to is set by the soft menu of signal generator, and the channel parameters of signal generator includes basic wave waveform, trigger source, output mode, modulation waveform and output impedance etc..In the preferred embodiment, basic wave waveform in channel parameters is set by the button on signal generator, concrete, basic wave waveform includes " Sine ", " Square ", " Ramp ", " Pluse ", " Noise " and " Arb ", and they switch over selection respectively through " Sine ", " Square ", " Ramp ", " Pluse ", " Noise " and " Arb " key on signal generator keyboard and set.Trigger source switches over setting by the soft menu " trigger source " under Menu key " triggering ".Output mode then can be switched over by " Mod ", " Sweep " and " Burst " key on keyboard.Modulation waveform and output impedance are also switch over setting by the soft menu under Menu key.
Status set step S102, according to a coding rule, is converted to a coding maker position by described channel parameters；
In the preferred embodiment, coding rule specifically so limits: when " Sine ", " Square ", " Ramp ", " Pluse ", " Noise " and " Arb " key on keypad sets " Sine ", " Square ", " Ramp ", " Pluse ", " Noise " and " Arb " basic wave waveform respectively, the coding maker position of they correspondences respectively " 1 ", " 2 ", " 3 ", " 4 ", " 5 ", " 6 ".Other channel parameters such as output mode are also suitable same coding rule, during " Mod ", " Sweep " and " Burst " key on keypad, and corresponding coding maker position respectively " 1 " " 2 " " 3 ".
Storing step S103, stores described coding maker position in predetermined memory block；
The storage position of each channel parameters has been reserved in advance in memory block, in the preferred embodiment, for basic wave waveform, output mode, trigger source, modulation waveform, output impedance preset 5 sequential memory area, be respectively used to storage the coding maker position " 1 " of basic wave waveform, " 2 ", " 3 ", " 4 ", " 5 ", " 6 "；Storage the coding maker position " 1 " of output mode, " 2 ", " 3 " etc..Concrete, when selected basic wave waveform parameter, when " Sine " button on keypad, in the memory area being used for storing basic wave waveform, just save coding maker position " 1 "；During " Square " button on keypad, in the memory area being used for storing basic wave waveform, just save coding maker position " 2 "；During " Ramp " button on keypad, in the memory area being used for storing basic wave waveform, just save coding maker position " 3 "；The like.Same, when selected output mode parameter, when " Mod " button on keypad, in the memory area being used for storing output mode, just save coding maker position " 1 "；During " Sweep " button on keypad, in the memory area being used for storing output mode, just save coding maker position " 2 "；During " Burst " button on keypad, in the memory area being used for storing output mode, just save coding maker position " 3 ".
Parameters acquiring procedure S104, sequentially obtains described coding maker position according to described predetermined memory block；
In this step, a user graphical interface module in signal generator can inquire about predetermined memory area successively, and sequentially reads coding maker position from predetermined memory block.
Decoding switch process S105, according to the decoding rule corresponding with described coding rule, is decoded as discernible character string by described coding maker position；
In this step, when user graphical interface module gets coding maker position " 1 " in basic wave waveform predetermined storage area, according to the decoding rule corresponding with coding rule, coding maker position " 1 " is decoded as discernible character string " Sine ".
State parameter plot step S106, on display screen 500 one is independent of in the independent fixed display area 501 of other viewing areas, drafting character string " Sine ", independent fixed display area 501 is shown in any one main display interface and the auxiliary display interface of described signal generator.
As other citing, other coding rule can also be set, in this illustration, coding rule is as follows: when " Sine ", " Square ", " Ramp ", " Pluse ", " Noise " and " Arb " key on keypad sets " Sine ", " Square ", " Ramp ", " Pluse ", " Noise " and " Arb " basic wave waveform respectively, the coding maker position of they correspondences is " a, " b ", " c ", " d ", " e ", " f " respectively.Other channel parameters such as output mode are also suitable same coding rule, during " Mod ", " Sweep " and " Burst " key on keypad, and corresponding coding maker position respectively " a " " b " " c ", also can realize same function.
The channel parameters of setting is converted to recognizable character string by the present invention rapidly and accurately, utilizing the independent fixed display area 501 display channel parameter independent of other viewing areas, independent fixed display area 501 is shown in arbitrary display interface of signal generator simultaneously.Make to enter into the assistant interface of signal generator or other any interfaces, can independent display channel parameter, user can carry out the inquiry of channel parameters in real time.
In the independent fixed display area 501 of this preferred embodiment, depict the channel parameters of two signalling channels side by side, wherein " Sine ", " Int ", " Sweep ", " Linear " and " HighZ " of first row, is the basic wave waveform of passage 1, trigger source, output mode, modulation waveform and output impedance respectively." Ramp ", " HighZ " of second row is basic wave waveform and the output impedance of passage 2 respectively, owing to the output mode in passage 2 is basic wave output, so there is no these channel parameters of trigger source, output mode and modulation waveform, correspondence position does not show content.In independent fixed display area 501, draw the channel parameters of two signalling channels side by side, it is possible to use family, when the channel parameters of two signalling channels of reference, conveniently contrasts the channel parameters index of two signalling channels.
As other citing, in this illustration, independent fixed display area 501 can also only be drawn the channel parameters of a passage.
As other citing, in this illustration, also include a passage unlatching and judge step, judge to be set whether passage is opened, when judge described set passage open time, in independent fixed display area 501, draw representative with the color identical with current channel color and set the character string of the channel parameters of passage.In this illustration, when the color of current channel refers to that being set passage opens, set the color of display waveform in the display interface of passage.
As other citing, in this illustration, when judge described set pathway closure time, in independent fixed display area 501, with Lycoperdon polymorphum Vitt draw represent set the character string of the channel parameters of passage.
When passage is opened, draw to represent with the color identical with current channel color and set the character string of the channel parameters of passage, during pathway closure, color to be different from current channel is drawn to represent and is set the character string of the channel parameters of passage, user can be made clearly to identify the channel parameters of different passage rapidly, it is simple to observe.
In the preferred embodiment, when path setting step S101 sets a new channel parameters, when described new channel parameters is decoded as new recognizable character string by decoding switch process S105, state parameter plot step S106, before drawing described new recognizable character string, first empties described independent fixed display area 501.
In the preferred embodiment, in decoding switch process S105, according to the decoding rule corresponding with described coding rule, and according to the current system language English of described signal generator, described channel parameters is decoded as the discernible character string represented with current system language, wherein the channel parameters of first row respectively " Sine ", " Int ", " Sweep ", " Linear " and " HighZ ", the channel parameters of second row respectively " Ramp ", " HighZ ".
As other citing, in this illustration, according to the current system language Chinese of described signal generator, channel parameters can also be decoded as the discernible character represented with current system language, wherein the channel parameters of first row respectively " sine wave ", " internal trigger ", " frequency sweep ", " linearly " and " high resistant ", the channel parameters of second row respectively " square wave ", " high resistant ".
With reference to Fig. 6, in another preferred embodiment of the present invention, also including, channel status judges step, it is judged that a signalling channel is on or off；
Channel status plot step, judge when described current channel is opened, the center position area in independent fixed display area 601 on the display screen 600 of signal generator, draw a channel status with the color identical with current channel color and open mark " ON ", judge when described current channel is closed, center position area in independent fixed display area 601, the color to be different from described current channel is drawn a channel status and is closed mark " OFF ".
The form display channel parameter with character string in independent fixed display area 601 both sides, in center position area display channel state, channel status and channel parameters are shown side by side, channel status does not also disappear with entering signal generator assistant interface so that user can become apparent from, pay close attention to the channel status of whole signal generator and all channel parameters clearly in real time.
With reference to Fig. 7, center position area 701 is a rectangular region, center position area 701 includes a graded bedding 7011 and a channel status draws layer 7012, graded bedding 7011 is with rectangular bottom for string, the minor arc region formed in rectangular region, the color of the pixel in minor arc region is from the central point of string, radial direction along minor arc place circle gradually becomes shallower as with linear rule, channel status is drawn layer 7012 and is placed on graded bedding 7011, channel status opens mark " ON " and channel status is closed mark " OFF " and is plotted on channel status drafting layer 7012.In the preferred embodiment, the midpoint on the upper base of described rectangular region is the end points of a diameter of the circle at described minor arc place.As other citing, in this illustration, the upper base of described rectangular region and described minor arc can not have intersection point.In the preferred embodiment, it is isosceles-trapezium-shaped that channel status draws the shape of layer 7012, and going to the bottom of isosceles trapezoid overlaps with described string, and the color of the pixel within isosceles trapezoid is identical with the background color of display screen 600.In the preferred embodiment, the color of two waists of isosceles trapezoid and the pixel of upper base, relatively the color of graded bedding 7011 is deep, and is gradually become shallower as with linear rule to upper base by two waists.
With reference to Fig. 8, it is shown that the preferred embodiment of the present invention draws the method flow diagram of graded bedding 7011,
Step S801, the total pixel count iNum according to the wide and high calculating center position area 701 of center position area 701；
Step S802, starts counting up from ith pixel point, and i is initially 0；
Step S803, it is judged that whether i is less than total pixel count iNum；
When step S804, i are less than total pixel count iNum, calculate the distance Di between ith pixel point and the center of circle of minor arc；
Step S805, it is judged that the radius whether the distance Di between ith pixel point and the center of circle of minor arc is round less than or equal to minor arc place；
Step S806, when distance Di is less than or equal to the radius of minor arc place circle, according to the color of the color calculation ith pixel point of dark pixel point most on the color of brightest pixel point, minor arc on Di, minor arc；Due in the preferred embodiment, the color of the pixel in minor arc region is from the central point of string, radial direction along minor arc place circle gradually becomes shallower as with linear rule, so, the pixel that on minor arc, color is the deepest is the central point of string, the pixel that on minor arc, color is the most shallow be minor arc point on the circumference of the circle；
As other citing, in this illustration, the color of the pixel in minor arc region can also from the central point of string, radial direction along minor arc place circle deepens gradually with linear rule, so, the pixel that on minor arc, color is the most shallow is the central point of string, the pixel that on minor arc, color is the deepest be minor arc point on the circumference of the circle；
Step S807, draws ith pixel point；
Step S808, when distance Di is more than the radius of minor arc place circle, is plotted as the background color of display screen 600 by the color of ith pixel point；
As other citing, in this illustration, the upper base of rectangular region to the color of the pixel between the arc of minor arc can also be different from the background color of display screen 600, adopts other colors to draw.Simply the upper base of rectangular region to the color of the pixel between the arc of minor arc identical with the background color of display screen 600 time, best results, more highlight the effect that the gradual change of graded bedding highlights.
Step S809, pixel i adds 1；
Step S810, when i is equal to total pixel count iNum, flow process terminates.
In the preferred embodiment, making two waists of isosceles trapezoid and the color of the pixel of upper base, relatively the color of graded bedding 7011 is deep, and is gradually become shallower as with linear rule by two waists to upper base and be specifically achieved in that
First, the coordinate of trapezoidal 4 end points is determined according to trapezoidal size；
Secondly, the coordinate according to described 4 summits, determine respectively the number of the pixel of trapezoidal upper base be n1, the number of the pixel of trapezoidal every waist be n2；
Then, it is color1 by the color settings of the pixel of trapezoidal upper base, the color of the pixel that the color of color1 is the most shallow compared with color on minor arc wants deep, the color settings of the pixel of trapezoidal two waist bottommosts is color2, the color of the pixel that the color of color2 is the deepest compared with color on minor arc wants deep, the color of trapezoidal two waists x-th pixel from the bottom to top is colorx, colorx=color2-(color2-color1) * x/n2.The computing of color is specifically performed in such a way that color value is to realize by the mode of coding, determine according to the figure place used in system: first a color value is formed R (red) by three parts, G (green), B (indigo plant), if system uses 24 place values to calculate color, RGB takies 8 respectively, value is from 0～255, altogether can encode the 24 power kind colors of 2, can select black is encoded to 0 (0x000000), white color-coded is 16777215 (0xFFFFFF), and other colors are between black and white；If system using 16 place values to calculate color, RGB takies 5,6,5 respectively, or 5,5,5 (highest order is invalid), still can select to be encoded to black 0 (0x0000), white color-coded is 65535 (0xFFFF), and other colors are between black and white.Realize color value by the mode of coding and belong to the implementation of prior art, no longer describe in detail here.
It is isosceles trapezoid that channel status draws layer 7012, and the color of two waists of isosceles trapezoid and the pixel of upper base is deeper than the color of graded bedding, and is gradually become shallower as with linear rule to upper base by two waists, more highlights the third dimension of the whole single centre band of position 701.
As other citing, in this illustration, the color of two waists of isosceles trapezoid and the pixel of upper base, it is possible to distinguish in the color of graded bedding, and deepened gradually with linear rule to upper base by two waists, as long as the third dimension that can strengthen the single centre band of position 701 is just passable.
In the preferred embodiment, it is draw channel status with the color identical with current channel color to open mark " ON ", draw channel status with gray color and close mark " and OFF ".
Draw channel status with the color identical with current channel color and open mark " ON ", draw channel status with the color of Lycoperdon polymorphum Vitt and close mark, it is possible to make user discover rapidly channel status, it is simple to observe.
As other citing, in this illustration, it is also possible to be different from the color of current channel color, select a kind of brightly painted color to draw channel status and open mark " ON ", as long as it is just passable to play the purpose highlighted.
As other citing, in this illustration, it can be the arbitrary shape except isosceles trapezoid that channel status draws the shape of layer 7012.And channel status draw the color of the interior pixels point that pixel and the channel status on limit of layer 7012 draws layer 7012 all can be identical with the background color of display screen 600.
With reference to Fig. 9, in conjunction with reference to Fig. 5, it is shown that a kind of system of display channel parameter on signal generator of the preferred embodiment of the present invention.Described signal generator at least includes a signalling channel and a display 500, it is characterised in that include with lower module:
Path setting module 901, for setting a channel parameters of described signal generator；
Status set module 902, for according to a coding rule, being converted to a coding maker position by described channel parameters；
Memory module 903, for storing described coding maker position in predetermined memory block；
Parameter acquisition module 904, for sequentially obtaining described coding maker position according to described predetermined memory block；
Decoding modular converter 905, for according to the decoding rule corresponding with described coding rule, being decoded as discernible character string by described coding maker position；
State parameter drafting module 906, on display screen 500 independent of, in the independent fixed display area 501 of other viewing areas, drawing described character string, independent fixed display area 501 is shown in arbitrary display interface of described signal generator.
On signal generator, the system of display channel parameter specifically flow chart shown in Fig. 4 performs each step.
Above-described it is only the preferred embodiments of the present invention; it is it should be understood that; the explanation of preferred embodiment above is only intended to help to understand method and the core concept thereof of the present invention; the protection domain being not intended to limit the present invention; the any amendment made within all thought in the present invention and principle, equivalent replacement etc., should be included within protection scope of the present invention.
Claims (10)
1. a system for display channel parameter on signal generator, described signal generator at least includes a signalling channel and a display screen, it is characterised in that include with lower module:
Path setting module, for setting a channel parameters of described signal generator；
Status set module, for according to a coding rule, being converted to a coding maker position by described channel parameters；
Memory module, for storing described coding maker position in predetermined memory block；
Parameter acquisition module, for sequentially obtaining described coding maker position according to described predetermined memory block；
Decoding modular converter, for according to the decoding rule corresponding with described coding rule, being decoded as discernible character string by described coding maker position；
State parameter drafting module, on described display screen independent of, in the independent fixed display area of other viewing areas, drawing described character string, described independent fixed display area is shown in arbitrary display interface of described signal generator.
2. system according to claim 1, it is characterised in that also include a passage and open judge module, for judging to be set whether passage is opened, when judge described set passage open time, in described independent fixed display area, draw described character string with the color identical with current channel color.
3. system according to claim 2, it is characterised in that when judge described set pathway closure time, in described independent fixed display area, be different from described current channel color draw described character string.
4. the system according to claim 1,2 or 3, it is characterised in that in described independent fixed display area, be arranged side by side the same channels parameter of multiple described signalling channel.
5. the system according to claim 1,2 or 3, it is characterized in that, when one new channel parameters of described path setting module settings, when described new channel parameters is decoded as new recognizable character string by described decoding modular converter, described state parameter drafting module, before drawing described new recognizable character string, first empties described independent fixed display area.
6. the system according to claim 1,2 or 3, it is characterized in that, described decoding modular converter, for regular according to the decoding corresponding with described coding rule, and according to the current system language of described signal generator, described channel parameters is decoded as the discernible character string represented with current system language.
7. system according to claim 4, it is characterized in that, when one new channel parameters of described path setting module settings, when described new channel parameters is decoded as new recognizable character string by described decoding modular converter, described state parameter drafting module, before drawing described new recognizable character string, first empties described independent fixed display area.
8. system according to claim 4, it is characterized in that, described decoding modular converter, for regular according to the decoding corresponding with described coding rule, and according to the current system language of described signal generator, described channel parameters is decoded as the discernible character string represented with current system language.
9. system according to claim 5, it is characterized in that, described decoding modular converter, for regular according to the decoding corresponding with described coding rule, and according to the current system language of described signal generator, described channel parameters is decoded as the discernible character string represented with current system language.
10. system according to claim 1, it is characterised in that also include,
Channel status judge module, is used for judging that a signalling channel is on or off；
Channel status drafting module, during for judging that described current channel is opened, center position area in described independent fixed display area, draw a channel status with the color identical with current channel color and open mark, judge when described current channel is closed, center position area in described independent fixed display area, the color to be different from described current channel is drawn a channel status and is closed mark.
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