2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor. If any questions or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Technical Support at (301) 975-1007.
2.1 FEATURES
• Supports point-to-point data rates from 1.2 to 19.2 Kbps
• Internal, crystal controlled clock
• Transformer isolation guards against ground looping
• Range to 11 miles
• Full duplex operation
• Custom VLSI chip with separate filter for each data rate
• No AC power or batteries required
• Miniature size
• High speed surge protection (Model 1020S only)
2.2 DESCRIPTION
The Patton Electronics Model 1020 miniature, synchronous short
range modem uses the latest in VLSI technology to combine high-
quality data transmission with compact size. The Model 1020 does not
require any AC power or batteries to operate, and communicates up to
11 miles in point-to-point environments.
Supporting full duplex transmission over two twisted pairs, the
Model 1020 has a crystal controlled internal clock. Data rates are
switch selectable from 1200 to 19,200 bps. The Model 1020’s custom
VLSI chip uses a separate filter for each data rate, rather than a single
“compromise” filter. Transformer isolation allows the Model 1020 to
operate between buildings without data disruption due to ground
potential differences.
The Model 1020S is a surge protected version of the Model 1020,
incorporating Silicon Avalanche Diodes that provide 600 watts of
protection per wire.
3.0 CONFIGURATION
The Model 1020 provides four configuration switches which allow
selection of RTS/CTS delay and data rates. This section describes
switch locations and explains all possible switch configurations.
3.1 SWITCH LOCATIONS
For your convenience, all configuration switches are located on a
SIP (single in-line package) mounted on the PC board. Figure 1 shows
the location of the SIP with respect to other PC board components. For
instructions on opening the Model 1020 case, see Section 4.1.2.
Figure 2 shows the orientation of the configuration switches,
including the ON/OFF position.
4
3
P AT
TO
N
PE068
XXXX
1
2
3
4
ON
OFF
Figure 1. Model 1020 PC board showing switches
Figure 2. Close-up of configuration switches
Control
Switches
Terminal Block
Patton
VLSI chip
Isolating
Transformers