Instruction/ maintenance manual of the product 2703 Patton electronic
Go to page of 11
USER MANU AL MODEL 2703 G.703/E1 Digital Modem SALES OFFICE (301) 975-1000 TECHNICAL SUPPORT (301) 975-1007 http://www .patton.com Part# 07M2703-I Doc# 031041UI Revised 08/16/99 An ISO-9001 Certified .
1.0 WARRANTY INFORMA TION Patton Electronics warrants all Model 2703 components to be free from defects, and will—at our option—repair or replace the prod- uct should it fail within one year from the first date of shipment.
2.0 GENERAL INFORMA TION Thank you for your purchase of this Patton Electronics product. This product has been thoroughly inspected and tested and is warrant- ed for One Y ear parts and labor .
3.1.1 Switch Set S1 The configuration switches on S1 set clocking, rate adaptation, loopback enable, data invert, and interface (see also Switch S2). The default settings are summarized in table below .
Switch S1-8: Loopback T est Enable Depending upon the setting of switch S1-8 the Model 2703 will either be continually in loopback mode, or loopback mode will be enabled by pressing and holding the front panel switch.
The internal jumpers mounted on the Model 2703’s PC board (labeled LK1 - LK7) are used to configure the 75 ohm or 120 ohm net- work link parameters. Figure 4 (above) shows the location of the Model 2703’s jumpers on the internal PC board. The table below shows the factory default jumper settings.
Jumper LK6 & LK7: 75 Ohm T ermination Impedance This jumper sets the termination impedance correctly for 75 Ohm operation. Both jumpers must be in place when operating in 75 Ohm (unbalanced) mode. Conversely , both jumpers must be removed when operating in 120 Ohm (balanced) mode.
4.2 CONNECTION TO THE TERMINAL DEVICE The Model 2703 is wired as a DCE, and–when configured proper- ly–supports communication with a wide variety of terminal (DTE) devices. Compatible interface standards include EIA-530 (RS-422), CCITT X.21 and CCITT V .
5.3 LOOPBACK TEST (LAL) The Model 2703 is equipped with a Local Analog Loopback (LAL) mode to assist in evaluating the operation of the local Model 2703. Any data sent to the local Model 2703 in this test mode will be echoed (returned) back to the user device.
APPENDIX B P A TTON MODEL 2703 PIN CONFIGURA TIONS 17 13- (CTS/) Clear to Send 12- (TC/) Transmit Clock 1 1- Not Used 10- (CD/) Carrier Detect 9- (RC/) Receive Clock 8- (CD) Carrier Detect 7- (SG) Sig.
19 APPENDIX C (contd) P A TTON MODEL 2703 F ACTOR Y P ARTS AND ACCESSORIES C-3 T erminal (DTE) Interface Cables No terminal (DTE) cable is supplied with the Model 2703. Y ou may construct your own cable using the pin-out diagrams in Appendix B, or purchase one of the Patton’s standard adapter cables listed below .
An important point after buying a device Patton electronic 2703 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Patton electronic 2703 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Patton electronic 2703 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Patton electronic 2703 you will learn all the available features of the product, as well as information on its operation. The information that you get Patton electronic 2703 will certainly help you make a decision on the purchase.
If you already are a holder of Patton electronic 2703, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Patton electronic 2703.
However, one of the most important roles played by the user manual is to help in solving problems with Patton electronic 2703. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Patton electronic 2703 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
