A null modem cable is still required by the satellite government. Next for flashing satellite receivers. If you don’t expect it, you can buy it and bring it yourself.

Yak I have already shown 0-modem cable We are now in the first place for rewiring satellite receivers. First, if you can buy a short one, which is simpler to buy, then for cardsharing through a computer you will need a new one or two (up to 15 m). And this is more beautiful to sleep yourself. Moreover, it is easy to be afraid to finish.

Yak zrobiti yourself null modem cable (RS232) cord for tuning the tuner with your own hands?

We know two DB-9F roses, a soldering iron, a soldering iron, a cable - a pair is twisted, how can I go for the most time (it’s possible to use the telephone with my hand normally), the diagrams and the hands.

Є There are several connection options, but most often a cable for three contacts is required. Well, it’s not like that, it’s just like that on all contacts, all the way down to the pictures below.

Do not re-zero the modem cable. Ale і vin man іznovedi, if there is a contact

Contacts 2 - 2 and 3 - 3, 5 - 5 straight lines

Contacts 2 - 3 and 3 - 2, 5 - 5 are not straight

Do not go straight to the most often.

Rspayuvannya com port rs-232 in satellite receivers can be ma and viglyad yak "tata" and "mami".

"Mothers" start playing more often, so the raju robots with two "mothers" at the end of the day.

The very indirect null modem cable With two mothers, and with a right-hand side opening, go for flashing more satellite receivers, or for sharing.

The installation of a new software protection from a satellite receiver can only be done through a zero modem cable. Forgive the price to be called the firmware of the satellite receiver. For receivers equipped with a RS-232 rose, upgrading the software, keys, dumping, upgrading the receiver in most cases, the modem cable must be deprived of the additional zero. To use the receiver, you need a computer or a laptop with (USB-COM adapter) or a COM port. The operating system for your computer receiver can be victorious Windows 98, Windows XP, Windows 7. Uvaga! Conduct the connection and connection to the cable from the receiver, only todi, if there are connections from the 220 volts. Before the hour of updating the software security, do not overwhelm the process of updating the software security. All can be connected from the fret of the satellite receiver.

Briefly about the null modem cable. The scheme is awkward, and it is not important to be able to read the picture in the minds of your own people using photographs below. In extreme vipadku buy on the radio market or a computer store. You need to use a null modem cable with your own hands, you need 2 RS-232 roses (type “mother”), a cable with three cores and a screen, even more importantly, you need to ensure stability for an hour of robotics ... It’s not so great a dojini! All the prices will need to be soldered behind the hover circuit below.

Scheme of a null modem cable for a satellite receiver

Zagalny viglyad zero modem cable. Zagalna dovzhina can be up to 10 meters. It is recommended that you choose a screening of 3 living wires. Screen solder on the ground.

photo 1

Below on the photo є zero modem cable for a satellite receiver without roses. 3 dots and a screen are used.

photo 2

Schematic representation of a null modem cable for a receiver.

photo 3

The current laptop and netbook do not have an RS-232 port. Only USB 2.0 or USB 3.0 Tom, for flashing a satellite receiver, you need to use an adapter to the USB-RS232 type (div. In the photo below). Such a link can be found at the computer store. Costu is inexpensive. For a set with an adapter, there is a disk for software security - a driver. The driver must be installed on a laptop, netbook. To blame the USB-RS232 adapter, use a zero modem cable at once. Without a null modem cable, you cannot flash a satellite receiver, so you can't get rid of roses. The circuit of a null modem cable is amazing.

For RS-232 (cables, roses, short description)

RS-232C pins

Disconnecting the "modem" cable to the RS-232C interface

Data exchange and RS-232 interface

Suspension of faults via RS-232

RS-232C pins

Contacts to the DB-9 connector to the RS-232C interface

Disconnecting the "modem" cable to the RS-232C interface

Supports a "null-modem" cable for the RS-232C interface

Supports RS-232C cable for Kramer switches

Data exchange and RS-232 interface

With robots in potentially noisy minds, we need to do the transmission of tribute. The archaic RS-232C (Recommended Standard 232 Version C), adopted by the EIA (Electronic Industries Association) from the 1969 rock, is still becoming the most popular standard.
Reverses RS-232:
Popularity - all PC computers (not Mac) have one RS-232 port
Easy handling of ready-made cables
Possibility of storing hardware control over the transmission process
Shortcomings of RS-232:
Point-to-point coupling (DTE? DCE)
Nizka, for modern little things, speed (call 9600 baud [bit per second])
Pratsyuє lishe on small walls (up to 10 m)
Warehouse line connection between DTE and DCE outbuildings is definitely not of value. The standard describes the functionality of up to 25 full lines, but it will not be ordered, who is not guilty of who is not guilty but who is not guilty of the line. More beautifully (technologically) please refer to the standard RS-422. For the tsim standard of communication, there are two pairs of wires, and the signal, which is transmitted, can be accepted by more than one attachment. According to the RS-485 standard (RS-422 counts), one pair of darts can be selected to be used for transmission or reception by attachments.
Characteristics of those reversals RS-422 / RS-485:
May vikoristovuvatisya for the many-point z'єdnan
Є de facto standard for a significant part of the movie video industry!
You can vikoristovuvatis on the vidstani up to 1.2 km.
Visoka stiffness to re-code for the distribution of differential (balance) lines
KRAMER VP-43 Range Extender:
The meanings for the podolannya obmezhena on vіdstanі for our products, which can be used for keruvannya via RS-232.
Zdіysnyu conversion to the RS-422 interface, and then back, to RS-232, which allows you to make a physical connection between two wires.
You can also get a quick connection for making a connection for any null-modem connection RS-232.
It can also be used to control our virobs via RS-422, otherwise it will transform the signal from RS-232 to RS-422 and back.
KRAMER VP-14 Port Extender:
The meanings for podolannya interconnected to the RS-232 interface, which can be used instead of using the "speck-speck" type. Allowing calls between decilcom and add-ons with RS-232 interfaces.
Dani, which come to be attached to any port, override the third port.
You can also buy a vicorist for a keruvannya with a commutator from three DTE attachments (for example, computers).
In all modes, communication (number of beats, speed, pairing is too small) and does not require adjustment of these parameters.

Suspension of faults via RS-232

Enter below, if you can help you see the problem, see the connection to the Kramer add-ons via the RS-232 interface.
1. Switch between the attachments (switch, router) and the computer (PC) a null-modem is installed.
Nayprostishe (with a 25-pin port on a PC), a null-modem adapter can be used to reach the attachment. Connect this adapter with a 25-pin socket to the last port of the PC, if you use a straight cable - to connect one to one - connect the 9-pin socket of the adapter to the last port on the attachment. (If the adapter is installed with an incompatible cable, then it is necessary to use a minimum of 9-pin roses from both ends: contact 2 with contact 2, 3 - 3 and 5 - 3 5.)
If a non-frontal 25-pin port on the PC is connected to a 9-pin socket on the annex (that is, without a null-modem adapter), do the following:
Pin 2 on a 25-pin rose'єmi - with pin 2 on a 9-pin
Contact 3 on a 25-pin rose'єmi - with pin 3 on a 9-pin
Contact 7 on a 25-pin rose'єmi - with pin 5 on a 9-pin
Short-circuit contacts 6 and 20 at once on a 25-pin rose
Short-circuit contacts 4, 5 and 8 at once on a 25-pin rose
If the 9-pin port on the PC is not connected to the front to a 9-pin rose on the annex, do the following:
Contact 2 on rose RS - with contact 3 on rose annex
Contact 3 on rose RS - with contact 2 on rose annex
Contact 5 on rose RS - with contact 5 on rose annex
Short-circuit contacts 4 and 6 at once on a rose RS
Short-circuit contacts 1, 7 and 8 at once on the rose RS
2. Reverse if all DIP switches are correctly installed.
3. Change, so the parameters of the transmission of the data on the PC will be lost on the attachment, and on the PC the correct com-port is vibrated.
4. As soon as the stench is attached to the vicorist one hour, get over it, and the stench is gone. Even in the system, which works according to the "master / slave" scheme, which is from the attachments, the exchange with such systems will not be superb.
5. If the attachment є has the function "DISABLE TXD" Likewise, if the DIP switch is selected for "connecting to the display", change the connection if it is allowed.
6. Contact 3 on the RS-232 rose will attach a vicorist for sending tributes to the PC (I will attach TXD and RXD to the PC). Contact 2 on the rosette will be attached to the PC for receiving data from the PC (I will attach the RXD and TXD on the PC). I can be cynical for the additional digital storage of the oscilloscope to change the position of the transmission / reception of the data on the indicated contacts.
7. In the majority of attachments, the "bidirectional" protocol of exchange is established. This means that the same code will be displayed as for transmission to the attachment of the command for the display of the song, so as it will be displayed in the attachment (in the PC) when pressing the buttons on the front panel for displaying the analogous event. For example, when you press the buttons and press the input 4 to the output 5, attach the sixteen code 7B to the computer; at the same hour, when the code 7B is rejected, it is also displayed when input 4 is connected to output 5. For such a protocol, you can easily analyze the code, you can use the add-on when pressing buttons on the front panel of the protocol.
8. For the hour of usuning of inadequacies, we can be victorious about the communal program of the Procomm type or Viewcom, which can be used to analyze the codes and add them. Then it is possible to try to supervise such code back (div. Point 7), reversing, so that you can correctly respond to them. Nareshty, it is possible to send a code that will turn your camp.
9. I am guilty of vikoristovuvatisya program, written by koristuvach, if possible, with the help of additional program programs, change to the one where the calls between the PC and the attachment of the pratsyu are normal.
10. For the possession, in which keruvannya via RS-232 is transferred as an option that is entered by the installation of additional hardware payment, invert, such a board is correctly installed (as described in the booklet). Zokrem, for a series of X02 switches, twist the straight cable to connect to the module;
11. Deyaky attachments can remove the control of one of the other elements of the possession and can adjust the robot via RS-232 with such a possession, and not with a computer. For most people, it is necessary to set the correct settings. For example, models BC-2216 and BC-2616 (matrix commutators of sound signals 16X16) are adjusted at the factory (for reasons) to the robot from BC-2516 (matrix commutator video 16X16). And here the sound matrix will reject the control from the PC through the video matrix. As a sound matrix, the demand is not overwhelmed, it seems to be changed over to the robot (I will add it to the robot in the mode, but the sound is out of place).
12. If you need to hang up a number of teams, before the final command of the command, you will turn over, then attach the command in front of the front. For a whole lot of daughter, reject the lead to the front of the team before the forces of the offensive.
13. Change the way you want to use the RS-232 interface for connecting to the add-on! Deyake possession (for example, a standard last Macintosh port), I would like an analogue RS-232, but we will exchange data.
14. If you are running Windows NT4.0 (and lower), you will see the previous logins. The system doesn’t have plug and play functionality, and it’s not easy to set up computer ports in this system. Go to Windows NT Documentation! Navigate as soon as your program works on computers with an operating system, it is possible that the Windows NT port will not be able to work correctly.
15. Beast to respect, but working for RS-232 (for the designation) does not change 10 meters! As long as there is a great need for a sound, it’s next to our podzhuvach line sound VP-43.
16. For viznachennyam, the RS-232 interface indicates the exchange between 2 ports (in the case of a PC and a switch). If you need to connect a number of attachments with RS-232 interfaces at once, you can use the VP-14 (for example, if you need to control the switch from 2 computers and the BC-2000 controller).
(NOTE: For some children from our line, it is allowed to use such annexes with such annexes in the case of a last-minute connection with straight cables - it’s worth it to be wrong in the light of a well-spoken house! with a computer via RS-232, only one is connected, a wire attachment.

Uvaga !!! A copy of the statty is hardened!
Entry
A lot of people are stuck with the problem, de buy a cable for the receiver and the computer for updating the software. We would like to tell you if you can solder a null-modem cable to connect the receiver and computer via the RS-232 port. Cable rewired on receivers: DRE 4000,5000,7300; Openbox FTA300, X800, X820, 770PVR.

Required parts for soldering
You need two COM(mom) rose'єmu. Rose'єm viglyadє like this:

This is the same way to get a body for a whole lot of roses:

Tsi roz'єmi z'єnuyutsya with a three-core cable behind the circuit 5-5;2-3;3-2


Yak droti can be vikoristovuvati twist a couple, yak can be stuck for the collection of hemlock cards.
The cable, which can be used for soldering, can be used for flashing receivers and card-sharing via a computer.

The author is not aware of the fact that your receiver will be out of order due to incorrect soldering. Nagaduєmo, the cable has been inverted on the following models: DRE 4000,5000,7300; Openbox FTA300, X800, X820, 770PVR. Find a receiver, a diagram of a cable for those who see it!

Mayzhe skin computer owns one last asynchronous adapter. You can call it an okremoyu board, which can be inserted into the expansion slot of a computer, or can be installed directly on the motherboard (system) board.

The last asynchronous adapter is also called an asynchronous RS-232-C adapter or an RS-232-C port. A leather asynchronous adapter is available to accommodate a number of RS-232-C ports, which can be connected to a computer for additional external attachments. This skin port will receive a number of registries, through which program I will receive access, and the IRQ number for signaling the computer about changing the port. After an hour, the BIOS will display the procedure for cobbing all the RS-232-C ports to the logical names COM1 - COM4 (COM-port number 1 - 4).

7.1. For what purpose is the asynchronous port of the input / output

The port of the last transmission is even wider. The axis is far from being a secondary transition to Zasosuvan:

• connect misi;
• connection of graphoboxes (plotters), scanners, printers, digitalizers;
• connection of two computers through the port of the last transmission for an additional special cable (null-modem);
• connection of modems in transmission of data via telephone lines;
• connecting to personal computers

7.2. Technical parameters for the RS-232-C interface

When transferring tribute to great cities without special equipment through the crosswalk, it can be induced by electro-magnetic fields, it is possible to win pardons. In addition, it is imposed on a dozen of cables with the available outbuildings, so you can use the additional RS-232-C interface.

The standard RS-232-C cable is 15.24 meters wide. However, in practice, it can be much larger. Vono bezpossredno to lay down in high speed transmissions. According to McNamara (Technical Aspects of Data Communications, Digital Press, 1982), the following values ​​are given:

Equivalent springs on the lines of the rose should be set for a logical zero -15-3 volts, for a logical unit - + 3-15 volts. Progress from -3 to +3 volts to an unassigned value.

If you connect the external attachments to the connector to the RS-232-C interface (and also when connecting two computers with a null modem), first connect the external charger to the computer, And if not, then you can put the asynchronous adapter into operation.

7.3. Asynchronous adapters

In the asynchronous serial adapter, a microcircuit of a universal asynchronous receiver - UART 8250 is stuck. In the given hour, more modern microcircuits of receivers - UART 16450, 16550 and 16550A - will freeze.

The UART microcircuits, prepared for the new technology, allow you to reach more high-performance data exchange, as well as new hardware capabilities. The main characteristics of the small UART microcircuits, and also of the asynchronous serial adapters, on such microcircuits are overhauled:

Type of microcircuit UART	Specifications
8250 (8250-B)	Vikoristovuvavavsya on the first models of the IBM PC / XT, there is little productivity
16450 / (8250-A)	The microcircuit 16450 will practically increase the display 8250. They have a pardon in the register to allow rewriting and the possibility of transferring the OUT2 line for a high-impedance mill
16550	There is also the possibility of internal buffering of data that can be transmitted and accepted. Buffers of the viconany at the viglyadi cherga (FIFO). Through a pardon in microcircuits, the power of buffering is more beautiful than vikoristovuvati - it is possible to draw in some symbols. In zalny vipadku microcircuit 16550 shvidshe, nizh 16450. microcircuit 16550 yes the ability to drive a number of channels in direct access (DMA channels)
16550A (16550AN)	For its characteristics, won 16 550, albeit in the right direction of the implementation of FIFO. This microcircuit allows you to select programs from several direct access channels (DMA channels). As long as you bazyuvati on higher speeds, at least 9600 baud, you are bazed to use an asynchronous last-time adapter, so you can take revenge on the same microcircuit.

7.4. SHO TAKE NULL MODEM

Since yours has two computers with asynchronous serial adapters, you can use a null-modem dog for help. The null-modem cable is connected to the ports of the last computer adapters.

For the additional help of special software security through a null-modem cable, you can preserve a copy of data from computers. As far as computers are not connected to a local border, and you need to rewrite from one computer to one great information exchange, you can register a null modem for the most beautiful solutions.

Null-modem є forgive the add-ons. It is stored in two roses and cables, with a singing rank. As long as you have two roses at the ports of the asynchronous adapter and a large-core cable, you can easily read the null modem yourself.

On little 7.1 there are two zero-modem circuits, like two pink DB25s.

Rice. 7.1. Null-modem circuits

The pink ports of the serial adapter are available in two types, DB9 and DB25. The number of roses is recognized by the number of signs of visnovka. Rose DB9 revenge 9, and Rose DB25 - 25 times. Uninvolved on business occasions, their functional capabilities are the same.

You took the null modem as soon as the circuit was in place, and the last adapter has a lot of roses from 9 patterns, and you can use a special adapter (div. Fig. 7.2).

Rice. 7.2. Converters DB25 - DB9

7.5. Yak call computers via asynchronous port

As long as you have two or more computers at your disposal, you can organize the exchange of data between them without a diskette and without installing fingered adapters.

For the general demand, use a port of asynchronous serial adapters of computers for an additional null-modem cable. For additional special software security, you can restore access from one computer, called the robot, to the disks of the server. You can only use it at a work computer, but you can get additional access to the server's disk drive.

As a program to secure, as vikoristovutsya to secure the connection between computers through the ports of the asynchronous serial adapter, you can speed up the programs Norton Commander or FastLynx. The operating system MS-DOS version 6.0 can be used in its own warehouse for organizing the connection of computers via a null modem.

Below you can see the list of Norton Commander programs from MS-DOS version 6.0.

Vikoristannya programs Norton Commander

A simpler program, as it is possible to vikoristovuvati for a non-frontal connection of two computers via a null-modem cable - tse Norton Commander. For an additional set of programs, you can exchange files between computers, with a whole lot of work you can only on one computer.

Making a null modem and asynchronous adapters can be as simple as possible, if you need to copy from one computer to the great information exchange. Since computers are not in the local framing, the process of copying through floppy disks can be trivial. Having shrunk as a null modem, you can significantly speed up the copying process. Below is a short instruction, like connecting two computers via asynchronous last adapters.

A selection of live data from both computers and connect them through an asynchronous serial port (COM port) with a null-modem cable. Then bring up the computers and run the Norton Commander program on both computers.

For a skin computer, vibrate from the Left or Right menu item linK. The Commander Link dialog box appears on the screen (div. Small 7.3).

Rice. 7.3. Dialogue window Commander Link

Then you need to vibrate the robot mode - "Master" (a working computer) or "Slave" (server), as well as the last port, which you can use to send - COM1 or COM2. A null-modem cable is connected to the same port.

For one of the computers, to recover, you need to vibrate the "Master" mode, and for the other - "Slave". With a whole lot of you can do it only on the computer, which is in the "Master" mode.

Changing Turbo Mode, retouching at the dialogue window Commander Link, setting the speed of exchanging data. Turbo Mode makes it possible to install instantly on both computers.

For additional Norton Commander programs, you can view the following:

• copy and transfer files from one computer to the first;
• see, open new server files, change file attributes;
• view directories on the server.

With the help of the Norton Commander programs, you cannot use the main computer to display such simple things over the server disks, as if you were looking at the directory tree and launching the program.

If you don’t satisfy with the power of Norton Commander, please use the operating system MS-DOS version 6.0 or connect your computers to the additional local hedge.

Vikoristannya zasob_v MS-DOS

Before the warehouse of the distribution kit of the operating system MS-DOS version 6.0, software is included for organizing the exchange of data between computers through the ports of the asynchronous adapter or parallel ports. The Interlnk driver and the Intersvr program are referred to them.

With the help of the Interlnk and Intersvr drivers, you can restore additional access from the work computer to the disks and printers connected to the server. At the same time, new attachments appear on the work computer, through which you can turn to the disks and parallel ports of the server.

Such a rank on a working computer is new disks and parallel ports. For their power, for the blame of shvidkodiya, the stench will increase the display of local disks and parallel ports of the computer. You can easily record and read files from these discs, run the programs. When a printer is connected to the server, you can open a new document without a front-end computer.

The process of connecting computers through the ports of the asynchronous adapter is understandable.

To use two computers, you need to use an additional null modem. Then enable the Interlnk driver in the CONFIG.SYS file of the work computer:

DEVICE = C: DOSINTERLNK.EXE

Parameter n indicates the number of server disks, if you want to send vicorists from a working computer. If you don't set the parameter, if only three disks are available:

DEVICE = C: DOSINTERLNK.EXE

Then start the Intersvr program on the server:

INTERSVR

Now the logical drives of the server and the th port of the printer can be accessed from your work computer.

Rice. 7.4. Server

Our work computer got three new disks with the names I :, J: and K:, as well as a new parallel (printer) port LPT2.

Through the I: and J: drives, you can restore access to the A: and B: drives installed on the server, through the K: drive to the C: hard drive of the server, and through the parallel LPT2 port, you can return to the attached printer (printer). to parallel to the LPT1 port on the server.