Patton electronic Patton Model 2450 Specifications, Appendix B Cable Recommendations

APPENDIX A

PATTON MODEL 2450 SPECIFICATIONS

DDS Type:	Dedicated
Transmission Format:	Synchronous, full duplex
Maximum Operating
Distance:	18000 feet (3.4 miles) over 26 AWG twisted
	pair
DTE Interface:	RS-232 (DB-25 female), RS-422/530 (DB-
	25 female), V.35 (M/34 female or DB-25
	female)
DDS Line Interface:	RJ-48S jack
Standards:	AT&T 62310 compliant
DDS Line Rates:	56 and 64 Kbps
DTE Rates:	56 and 64 Kbps
Transmission Line:	4-wire
Applications:	DDS, point-to-point or multipoint; Clear
	Channel, point-to-point; campus-area point-
	to-point
Indicators:	LED indicators for TD, RD, CD, No Signal,
	Error and Test Mode
Diagnostics:	V.54 compliant local and remote loopback
	tests; V.52 compliant 511/511E BER test
Power Supply:	120 VAC, 60 Hz or 230 VAC, 50 Hz to 10
	VAC, 1A wall mount transformer
Dimensions:	(RS-232 version) 1.65”H x 4.18”W x 3.55”D;
	(V.35 version w/ screws) 1.65”H x 4.18”W x
	3.96”D

APPENDIX B

CABLE RECOMMENDATIONS

The following statements apply to the Model 2450 when used as a short range modem over private twisted pair:

All Patton Electronics Company Short Range Modems (SRMs) are tested to the distances published in our Catalogs and Specification Sheets on twisted-pair cable with the following characteristics:

Wire Gauge	Capacitance	Resistance
19 AWG	83nF/mi or 15.72 pF/ft.	.0163Ω /ft.
22 AWG	83nF/mi or 15.72 pF/ft.	.0326Ω /ft.
24 AWG	83nF/mi or 15.72 pF/ft.	.05165Ω /ft.
26 AWG	83nF/mi or 15.72 pF/ft.	.08235Ω /ft.

We fully expect that the Short Range Modems will operate on lines with specifications different from those tested, but to reduce the potential difficulties in the field, one should ensure that the cable being used has similar or better characteristics (lower capacitance or lower resistance).

Wire with capacitance of 20pF/ft. or less is suitable for all our Short Range Modems . However, distances may vary from those published in our catalog. Variations in wire resistance will also affect distance but not functionality. Wire should be 26 AWG or larger (smaller AWG#).

Patton products are designed to withstand normal environmental noise and conditions however, other environmental factors too numerous to discuss in this format may affect proper operation of the SRM’s.

Selection of the proper SRM for an application is critical to maintaining Customer Satisfaction and should be taken seriously. Certain models are better suited for particular applications and environments than others.

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