Patton electronic 1094A user manual Switch S3-7 Reset Software Defaults, 4 . 0 INSTALLATION

NOTE: Based upon the chosen DTE rate, the Model 1094A will automatically select the optimum line rate for distance. This selection is based on the lowest line rate that will support the DTE rate.

Switch S3-7: Reset Software Defaults

Switch S3-7 allows the user to reset the software configured facto- ry defaults.

S3-7	Factory Test
On	Normal Operation
Off	Reset

Switch S3-8: Transmit Data (TD) Sampling Point

Switch 3-8 controls the Transmit Data (TD) sampling point.

S3-8	Setting	Description
On	Normal	TD sampled on the falling
		edge of the 1094A Transmit
		Clock (TC)
Off	Invert	TD sampled on the rising
		edge of the 1094A Transmit
		Clock.

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4 . 0 INSTALLATION

Once the Model 1094A is properly configured, it is ready to con- nect to the twisted pair interface, to the serial port, and to the power source. This section tells you how to make these connections.

4.1 CONNECTING THE TWISTED PAIR INTERFACE

The Model 1094A supports communication between two DTE devices at distances to 4 miles (8 km) over 24 AWG (.5mm) twisted pair wire. There are two essential requirements for installing the Model 1094A:

1.These units work in pairs. Both units at the end of the twisted pair must have the same 2-Wire connection and DTE rate.

2.To function properly, the Model 1094A needs one twisted pair of metallic wire. This twisted pair must be unconditioned, dry, metallic wire, between 19 (.9mm) and 26 AWG (.4mm) (the higher number gauges will limit distance). Standard dial-up telephone circuits, or leased circuits that run through signal equalization equipment, or standard, flat modu- lar telephone type cable, are not acceptable.

The RJ-45 connector on the Model 1094A’s twisted pair interface is polarity insensitive and is wired for a two-wire interface. The signal/pin relationships are shown in Figure 3 below.

	1	(N/C)
1	2	(N/C)
	3	(N/C)
2
3	4	(2-Wire TIP)
4

55 (2-Wire RING)

6	6 (N/C)
7
8	7 (N/C)

8 (N/C)

Figure 3. Model 1094A twisted pair line interface.

IMPORTANT!: The Model 1094A has been optimized for performance at high bitrates (DTE rates greater than 512 kbps). To ensure accurate performance at these bit rates, please use twisted pair line interface cable that is at least 330ft (100m) in length.

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