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:
Wire 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.
