15
APPENDIX A
PATTON MODEL 2702
SPECIFICATIONS
Network Data Rate: 2.048 Mbps
+
50ppm
Network Connector: RJ-48C
Nominal Impedance: 120 ohm (75 ohm available when using
Patton Model 460 Balun)
DTE/DCE Interface: V.35 (DCE Orientation) on Male M/34
Line Coding: Selectable AMI or HDB3
Line Framing: G.703 (Unframed)
Clocking: Network, Internal, External (from DTE)
DTE Data Rates: 2.048 Mbps
Diagnostics: V.54 Loopback & Local Loopback
Indicators: Power, Transmit Data, Receive Data,
Alarm, Loss of Tx Clock, Test Mode,
Error
Configuration: 8-Position DIP Switch
Power: Regulated 5VDC
+
5%, 300 mA mini-
mum
Humidity: Up to 90% non-condensing
Temperature: 0 to 50
o
C
Dimensions: 4.8”L x 2.0”W x 0.88”H (12.2 x 5.1 x 2.2
cm)
16
APPENDIX B
PATTON MODEL 2702
CABLE RECOMMENDATIONS
The Patton Model 2702 has been performance tested by Patton
technicians using twisted-pair cable with the following characteristics:
W
ire Gauge Capacitance Resistance
19 AWG 83nf/mi or 15.72 pf/ft. .0163 Ohms/ft.
22 AWG 83nf/mi or 15.72 pf/ft. .0326 Ohms/ft.
24 AWG 83nf/mi or 15.72 pf/ft. .05165 Ohms/ft.
To gain optimum performance from the Model 2702 , please keep
the following guidelines in mind:
•
Always
use twisted pair wire—this is not an option.
• Use twisted pair wire with a capacitance of 20pf/ft or less.
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid AWG
numbers higher than 26)
• Use of twisted pair with a resistance greater than the above
specifications may cause a reduction in maximum distance obtain-
able. Functionality should not be affected.
• Many environmental factors can affect the maximum distance
obtainable at a particular site. Use the above data rate/distance
table as a
general guideline only.