CN2071406U - Liaison machine for sentry post - Google Patents

Abstract

The utility model discloses a liaison machine for the sentry post, which can conduct single machine talking, talking amplification, conference call and other functions. The utility model is suitable for conducting communication contact on the coated wires, the overhead open wires or the cables of various models and the communication contact of the real wires of long distance with poor line quality. A portable magnetic telephone in an HCX-3 type is additionally provided with a power amplifier, an equalizer, a volume control potentiometer, a function conversion switch and the lightning protection measure of three poles. A sending end improves the signal level as high as possible. A receiving end is provided with attenuation depression signals of an equalizing network. The signal and noise ratio is improved. Mixed noise is suppressed and communication distance is increased.

Description

Liaison machine for sentry post

The utility model relates to a kind of portable type magnetic telephone unit.Be specially adapted to various insulate lines, aerial line and cable are applicable to the remote motor-driven solid line liaison of field operations and company and sentry post, the liaison between sentry post and the sentry post.

What at present army communicated by letter usefulness with local solid line all is HCX-3 type portable type local battery apparatus, and this magnetite unit is mainly by hand generator, magneto bell SHH-1 type electromagnetic receiver, SO-451 type carbon transmitter, hybrid coil (induction coil), mobile phone is held key, compositions such as binding post.When making means of communication with this unit, mate light-duty insulate line road, simultaneously two phones are being not more than under the even noise conditions of 75db audio frequency leading to, and communication distance can reach 21 kilometers, and its other string noise that can not suppress to come on the circuit.Along with the development of telecommunications, the renewal of communication equipment, maintenance work develops into present centralized management by original dispersion multi-location maintenance and safeguards, like this, company and sentry post, the maintenance between sentry post and the sentry post be apart from having elongated, indivedual centralized maintenance sentry posts apart from company about hundred kilometers.Particularly open-wire circuit string noise is big, and speech quality is poor, and still with the existing magnetic telephone unit communication comparison difficulty that just seems, conversation string noise is big, and volume is little, and it is also very inconvenient to open videoconference, like this, and just to bringing very big difficulty in the liaison.

The purpose of this utility model provides a kind ofly under the second-rate situation of circuit, can suppress circuit string noise, improves signal to noise ratio, increases communication distance, gives and drives the sentry post service equipment that videoconference brings convenience.

The utility model is realized as follows: with former HCX-3 type portable type magnetite unit give, the connection of receiver makes five-wire system into by three-wire system, will receive and dispatch separately independent.Sending input, promptly (see figure 1) on former unit circuit diagram disconnects " S " and " SS " connection place respectively, and serial connection one is by two LA4100 power integrated packages and attached resistance, electric capacity, form push-pull power amplifier, improve the signal level of transmitting terminal.Still use the output that is coupled of " HQ " output transformer on the former machine, two outputs of " 1 " of this transformer, " 4 " two termination amplifiers sending output.Secondary " 2 ", the output of " 3 " two ends, this transformer secondary output centre cap is connected " 1 " end place to be disconnected, a 1KC equalizing network of being made up of inductance, electric capacity in secondary centre tap loop serial connection one and an end of an adjustable potential meter and receiver link, the string noise signals that suppresses receiving loop improves signal to noise ratio and antijamming capability.Potentiometer is regulated as the volume of receiving loop and is used.Function conversion is by two double-pole four throw switches controls, and when using as conference telephone, outside line receives the signal of returning and is added in amplifier input terminal again and amplifies, and exports directly to be added to the receiver two ends by transformer and directly to listen to.When doing the conference telephone use, amplifier power supply is not subjected to the mobile phone key control, directly connects by switch.

The utility model increases communication distance because improve on the basis of former HCX-3 type portable type local battery apparatus, and it is obvious to suppress the string noise, and various elements are not had specific (special) requirements, realizes easily and uses.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof:

Fig. 1 is a HCX-3 type portable type local battery apparatus electrical schematic diagram.

Fig. 2 is the utility model circuit diagram.

The utility model (seeing accompanying drawing 2) installs 70 * 100mm printed circuit board (PCB) additional in former HCX-3 type portable type local battery apparatus plastics frame bottom, by two two routine direct insertion LA4100 power integrated packages, with anti-self-excitation capacitance (C5, C6, C7, C9, C13, C14), coupling capacitance (C1, C2, C10, C11), filter capacitor (C15) and resistance (R1, R2, R3, R4) are formed push-pull power amplifier.Amplifier input terminal and transmitter interface link with BB-301 type output transformer (B1), and input signal is coupled to amplifier amplification and output.The output of amplifier utilizes the transformer (B2) of former phone itself to export.Disconnect at transformer (B2) centre cap place, seal in the 1KC equalizing network of forming by inductance (L1), electric capacity (C16), be connected in series together shaft potential meter (W1) simultaneously, adjust volume.When doing the use of meeting amplifier, the signal that outside line receives is through equalizing network, and volume is regulated potentiometer, is added to the input of local amplifier, through amplifying output phone volume is further improved.Adopt the conversion of two double-pole four throw switches (K1 and K2) controlled function in the circuit, make five-wire system into, with sending and receiving independently separately, guarantee unit and amplify two kinds of independently talking modes by original three-wire system.When light engine position uses, still adopt the power supply of 3V power supply,, add battery of two joints, control by subject for ridicule hand key (K) in unit plastic casing lid left side amplifying the position conversation and when the meeting amplifier uses, adopting the power supply of 6V power supply.Output at external connection has added three grades of lightning protection measures, and the first order adopts (R-5B) glass discharge vessel, and two HF switch pipes (BG1, BG2) of butt joint are mutually adopted in the second level, and the third level is adopted 75V piezo-resistance (YZ).

Claims (3)

1, a kind of portable sentry post service equipment, it is characterized in that sending the input in words loop to insert a push-pull power amplifier of forming by two integrated packages, resistance and electric capacity at the magnetic telephone unit, in order to amplifying telecommunication signal, and be sent to the input of magnetic telephone unit output transformer HQ; Simultaneously " HQ " transformer secondary output centre cap " 1 " is located to disconnect series connection equalizing network and an adjustable potentiometer that serial connection one is made up of inductance, electric capacity.

2,, it is characterized in that the output of two LA4100 integrated packages in the amplifying circuit is connected on " 1 " end and " 4 " end of transformer (B2) respectively according to the described sentry post of claim 1 service equipment.

3,, it is characterized in that forming the 1KC equalizing network by inductance (L1) and electric capacity (C16) is connected in series between transformer secondary output centre cap " 5 " end and the adjustable potentiometer (W1) according to the described sentry post of claim 1 service equipment.

Images