JPS58157230A - Automatic measuring device of multiplex line - Google Patents

Abstract

PURPOSE:To decrease the time required for teaching a worker and to prevent the reading error and mis-recording, by forming a combined measuring circuit in response to measuring items automatically with a control section, switching a measuring channel and performing the measurement and recording automatically. CONSTITUTION:Measuring devices 12-16 are incorporated in a measuring device so as to measure most of the requested measuring items. The control section 19 forms the combined measuring circuit in matching with the measuring items and procedures, and channels CH1-CH12 are switched for the measurement. The result of measurement is recorded on a printer 22 and a data cassette tape 23 and data communication is done with other systems via a modulation and demodulation device 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic multiple rotation fixing device for audio frequency bands for testing and maintaining carrier equipment using either FDM or PCM.

Currently, in Japan, the effective transmission band for voice over telephone lines is 300 to 340, based on the recommendations of CCI TT.
0Hz is adopted and this is called the audio frequency band. In recent years, with the increase in the number of telephone users, multiple carrier systems have become popular, and this system ensures the quality of calls over long distance transmission lines and has a configuration that is fully satisfactory considering the economic efficiency of calls. .

FIG. 1 is a connection diagram schematically showing the conveyance device.

In the figure, (1) and (5) are terminal devices, (2) and (4) are terminal equipment, and (3) is wired or wireless transportation outside the city.
layer, A-kai R, D and 8R) ilJk-111r and d are relay contacts, H is a hybrid circuit, and station is a balanced network. Since these K are already known, their explanation will be omitted. Also, 2W is a 2-wire communication line, 4W8 and 4WR are 4
The R-type call sending line and call receiving line are lines, 8S and SR are the signal sending line and signal amount line used for sending and receiving calling signals, and the terminals shown with black circles are the points where measurements are taken in this WA. It is. The measurement at this point includes each layer of 4W8.4WR188 and 8R, and usually one terminal equipment K is installed with 12 to 24 channels, and approximately 10 measurements are required for each channel. Since there are various items, it is necessary to use a combination of several types of constant devices. Conventionally, this type of measurement requires the use of several FGI measuring instruments, which has required the operator to have specialized knowledge about the terminal equipment itself and the measuring instruments used. In addition, since most of the measuring instruments are analog instruments, not only is there a difference in readability, but also the problem of having nested data is a problem that cannot be ignored. Furthermore,
There were also problems with variations in work time due to differences in the proficiency of workers and the complexity of transportation.

The present invention seeks to provide a novel multi-line automatic measuring device that overcomes the various drawbacks mentioned above. That is, the present invention uses an oscillator, a level needle, and a bandpass PIIl so that almost all of the required measurement items can be measured.
The control unit automatically combines these components to form a measurement circuit according to the KaJ fixed items, switches the adjustment channel, and automatically performs measurement and measurement. It is characterized by the act of recording notes.

Hereinafter, the present invention will be specifically explained with reference to the drawings.

First of all, the main V! Table 1 shows the items to be measured in 4. FIG. 2 is a block diagram showing an example of the configuration of the present invention. As shown, the terminal station's 4W8s4WR*88 and SR each i1
1, ll'DM or P
It is applicable to any modulation method of CM. In FIG. 2, QQ indicates a channel selector, aυ indicates a connection connector, and connection connectors αD are provided for the number of channels CHI to CH1g, 4WS and 4WR1, respectively.
88 and 8R1 [with constant plug. When measuring, connect these fixed plugs to the measurement terminals marked with black circles in Figure 1, and remove the line with the white circle terminals.In the example in Figure 0, connect the measurement channels to 12
However, it is of course possible to increase or decrease the number of channels to 24 channels or other channels. The channel selector OI is controlled by a control unit a9 to be described later.
Select the connection connector aυ that corresponds to the measurement channel via 4WS or 4W depending on the signal to be used.
Switch RI 88, SR@. a'a is an oscillator with variable frequency and output, for example, 300 to 3
It outputs the frequency of the 400Hz audio band in steps of 100Hz, and the output level ranges from -34dBm to +34dBm.
The Kf tag outputs up to 10 dBm at 0.5 dBm every f). The frequency and output of these '1 oscillators az are controlled by a control unit 09, which will be described later, in accordance with the measurement items, and are output to 4WS@.

q3 is a dial signal generator, 10pps or 201
) can be set to either PI and output to SSM. In addition, this 88 signal can be used as a data communication signal when performing a facing test of the transport device (in a facing test, the feed points of both end stations are connected), but in this example, both end stations The dial is used to measure distortion between the two. The dial distortion measuring device (141) inputs the SR signal and keeps its rate constant.

The level regulator αG is, for example, in the measurement station wave number band 29GH.
z ~ 130kHz and the measurement level is -70dBm ~
+ 10dBm 4 digits # -) V 7 Digital
It is a level needle. The measured value is output directly to the display QllK and also to the control unit fi9. aS is the evaluation noise equalization amount EQL, 51 band pass filters, band 1
i1 stop? '1l14118EF circuit, these BQL, BPF depending on the measurement items as described later.

Switch the BEF to keep the reception level constant.

The control section a9 can be composed of, for example, an 8-bit microcomputer and its peripheral elements (ROM*RAM, etc.) K, and controls all functions of the apparatus except the display of level meter measurement data. That is, oscillator a2, dial signal generator α, dial distortion measuring device (14), EQL
and various FF devices α, channel selection @(1(I i/
The measurement circuit described below is configured by combining with the III constant items and measurement procedures to perform measurements.

Measurement results can be obtained from a printer or data cassette (c).
Can be arranged. The modulator/demodulator is for normal data transmission, allowing data communication with other systems and enabling remote control and transmission. Also,
If it is combined with a direct value data processing device (such as a personal computer), it becomes easy to perform theta-no-hata collection.

The operation section (2) is a section for presetting all the functions of this device, and is composed of, for example, switches, and is mainly used for switching between automatic measurement and manual measurement, setting measurement items, channels, etc.

The settings may also be in the form of interaction with the character display.

The measurement circuits for each item are all similar to conventional measurement circuits, and the measurement data is compatible with already measured data. In addition, since all of the items are parameterized, there is no need to set various conditions when performing basic measurements. Furthermore, conditions etc. can be arbitrarily set according to the requirements. In addition to recording measurement results, the data cassette 123 also records most of the conditions that can be input from the operation section ①. As a result, FDM
The time required to measure all nine items on all channels was about 11 minutes, but the time required could be further reduced by making the printer and data cassettes more expensive.

Next, the outline of the measurement circuit configured when measuring the measurement item indicated by the first 'llK with this apparatus will be described. Measurements begin after a meeting between the terminal stations.

■ Level diagram measurement As shown in Figure 3, set the oscillator 0z to 800Hz (PC
(900Hz for M system), -BdBmK set, 4W
8 Output to II. On the receiving side, the input level at 4WRIIK is read by level meter α9. in this case,
Match the channel numbers of the 4W8 Aoi and 4WR lines, and measure all channels.

0 frequency characteristics As shown in Figure 4, 5 & C, the output level of the oscillator α is 1 $.
dBm [fixed, my number 300Hz-400Hxt6
00Hz*800Hz e 1500Hz 12400
Hz 3000Hx * 3400Hz and 11th switching and read the reception level of each side tIla of all channels.

■Overload characteristics (FDM method only) Oscillator αa is 800H14,5dBm K * 7)
L, output to JWS line. At this time, read the deviation of the reception level (based on QdBm). The measurement circuit is the same as II [Figure 3] except that only the output of the attenuator is set to -4,5alBmK. Measurements are made for all channels.

■Transmission loss level characteristics (PCM method only) As shown in Figure 5, the frequency tII of the oscillator a3 is fixed at 909HzK,
Output v Her +3 dBmt QdBrr++ -I
QdBm*-20dBm = -30dBm Switch to output K and read the deviation of the reception level. Measurements are made for all channels.

ox book mts nature (FDM) J [MfI when calling! #Sex C
j′cM) As shown in the 61st gK, the output *tjJ(12 is not used and all output terminals of 4W8 are terminated with 600Ω, although not shown.And, ff1fH1iF equalization amount QL (CC
I'Ivr, G-277) Measure the filtered noise level for all channels.

■Quantization noise characteristics (PCM only) As shown in Figure 7, oscillator a2 has a frequency of 900Hz.
Fix K and output v to tv Od Bm s 10d
Bm s 39dBm Il-34dB K is switched and output. The receiving side evaluates using IQL and measures the noise level. Then, by comparing f[Nq that passes through BEF (fo = 900H) and the value S that does not pass, S/
The N ratio is determined as 8-Nq.

■Far-end crosstalk characteristics 5 as shown in Figure 8. On the oscillator - 800Hz (PCM
is 900Hz), =8dBm K(!
Output to 4W8@. The receiving side reads the skin through the BPF. At this time, measurements are made with the channel number of 4W8 lI and the channel number of 4WR11 made different.

m constant is performed on all channels, AWR not measured
Line channels are terminated in 600Ω.

■Near-end crosstalk characteristics As shown in Figure 9, oscillator α2 transmits 8QQHz (
PCM is 900Hz), -8dBm signal is added, all channels of the other station are terminated with 6000, and the 4WRI of the corresponding channel A- (i.e. channel 1) of the own station is added.
Measure the level of I. Measure all channels in the same way.

■Dial distortion characteristics Partner station (7) 88 (signal sending) I! A dial signal of 10 pps (or 20 pps) and a make rate of 33% is added to the signal, and the distortion of the own station is measured.

Control unit 0 for configuring the above-mentioned measurement circuit! Since those skilled in the art can easily implement J and the operation section (2), detailed explanations thereof will be omitted.

As is clear from the above explanation, the present invention can be applied to both modulation methods of FDM*PCM, shortens the time required for training workers on specialized fine details, and improves readability. Errors and writing errors are almost eliminated, and since it is possible to remotely control equipment and transfer data over long distances, data can be centrally managed easily and quickly, data file creation is streamlined, and workers are able to move easily. This also eliminates the complexity of

It should be noted that the present invention is not limited to the above-described embodiments, and can be modified in various forms as long as they fall within the gist of the invention as set forth in the claims.

[Brief explanation of the drawing]

Fig. 1 is a connection diagram showing an outline of the conveyance electric manufacturing system, Fig. 2 is a block diagram showing a configuration example of the present invention, and Figs. 3 to 9 are various measurements configured using the measuring device shown in Fig. 2. It is a contact diagram showing an example of a circuit. (21, (41... Carrier terminal equipment, Ss...
・Signal sending line, SR...Signal receiver is at the edge, 4WS...
...Call sending line, 4WR...Call receiving line, 01
... Channel selector, O2 ... Oscillator,
α〥・・・Dial signal generator, α4: Dial distortion measuring device, α9: Circuit including evaluation noise equalizer and band Pfl device, (IE9: Level Measuring instrument, a...control section, ■...operation section.Figure 2Figure 3Figure 4

Claims (1)

[Claims] A channel selector that selects the channel to be measured and separately switches the signal sending line, signal amount line, call sending line, and call receiving line of the carrier end station equipment belonging to that channel, and the frequency and output level are variable. an oscillator,
The dial signal generator, dial distortion measuring device, equivalent noise equalizer, band PrHt device, level measuring device, and each of the above layers are controlled to form a combined measurement circuit according to the measurement items and measurement procedures. A voice W8 equipped with a control unit for setting measurement items and channels, and an operation unit for setting measurement items and channels.
Multiline automatic measurement device for wavenumber bands.