3.0 CONFIGURATION
The Model 1025 provides six configuration switches which allow
selection of clocking method, RTS/CTS delay and data rate. This sec-
tion describes switch locations and explains all possible switch config-
urations.
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 compo-
nents. For instructions on opening the Model 1025 case, see Section
4.1.2.
Figure 2 shows the orientation of the configuration switches,
including ON/OFF position.
2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is warrant-
ed for One Year parts and labor. If any questions or problems arise
during installation or use of this product, please do not hesitate to con-
tact Patton Electronics Technical Support at (301) 975-1007.
2.1 FEATURES
• Supports data rates to 19.2 Kbps
• Internal, external or receive loopback clocking
• Transformer isolation guards against ground looping
• Range to 11 miles
• Operates full duplex over two unconditioned twisted pair
• Customized VLSI chip with separate filter for each data rate
• No AC power or batteries required
• Miniature size
• Silicon Avalanche Diode surge protection (Model 1025S)
2.2 DESCRIPTION
The Patton Electronics Model 1025 miniature, synchronous
short range modem uses the latest in VLSI technology to combine
high-quality data transmission with compact size. The Model 1025
does not require any AC power or batteries to operate, and communi-
cates up to 11 miles in point-to-point environments. For maximum flex-
ibility, the Model 1025 supports three clocking options: internal, exter-
nal or receive loopback.
Providing full duplex transmission over two twisted pair, the Model
1025 accommodates seven switch selectable data rates from 1200 to
19,200 bps. The Model 1025’s custom VLSI chip uses a separate filter
for each data rate, rather than a single “compromise” filter.
Transformer isolation allows the Model 1025 to operate between build-
ings without data disruption due to ground potential differences.
The Model 1025S is a surge protected version of the Model 1025,
incorporating Silicon Avalanche Diodes that provide 600 watts of pro-
tection per wire.
PATTON
PE068
XXXX
Control
Switches
Terminal
Block
Patton
VLSI chip
Isolating
Transformers
3 4
123456
ONOFF
Figure 2. Close-up of configuration switches
Figure 1. Model 1025 PC board showing switches