Datum Systems PSM-500L Bedienungsanleitung PDF herunterladen (Seite 32)

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification

Rev. 0.86

A-32

interface. The interface is selectable as either RS-232 three line interface (transmit, receive and

ground) or RS-485 interface to a 4 wire bus with 3 state transmit operation. The modem address

and operating mode is settable via the front panel or from terminal mode. The serial command

mode control interface only responds to commands from its associated controller when properly

addressed.

Refer to the associated "Remote Command Interface Specification" for details of the serial link

command structure, protocol and available commands.

General Unit Specifications

Mechanical

IF connection type:........................................... 75Ω BNC female connectors, 1 XMT, 1 RCV

.......................................................... Located on Rear Panel

Reference Input: ..............................................50Ω BNC female located on Rear Panel.

Data and Digital I/O connector :....................... 37 pin female D type rear panel connector.

Controller Interface: ......................................... 9 pin "D" type female for RS-485 and RS-232

.......................................................... interface located on Rear Panel.

Alarm Interface:................................................ 9 pin “D” type male with 2 form C contacts.

.......................................................... interface located on Rear Panel.

Auxiliary Interface ............................................37 pin male D type rear panel connector.

Power Connector: ............................................ IEC 3-pin male with switch located on rear

.......................................................... panel.

Main Board Size:.............................................. Approximately 9.5 x 11 X 1.2 inches.

Option Interface Board Size:............................ Approximately 3.5 x 7 X 1.5 inches.

Packaged Modem Size:.................................. 1 Rack Mounting Spaces by 12 inches deep.

.......................................................... Approximately 19.0 x 12 X 1.75 inches.

Electrical Power Requirements

Prime Power:.................................................... 90 to 260 Vac, 47-63 Hz, 50 Watts maximum

70/140 MHz Unit typical ................... Less than 25 Watts.

L-Band Unit typical ........................... Less than 30 Watts exclusive of BUC power.

Internal Voltages: ............................................. +5 Volts DC ± 5% at 1.5 Amp max.

.......................................................... +12 Volts DC ± 5% at 0.8 Amps max.

.......................................................... -12 Volts DC ± 5% at 0.3 Amp max.

Note: Options may increase internal current draw.

Environmental

Operating: ........................................................ -10 to +50°C, to 95% humidity, non-condensing.

Non-Operating: ................................................-20 to +70°C, to 99% humidity, non-condensing.

Burst Mode Operation

A standard modulator burst mode has not been implemented in the PSM-500 modem yet. This is

because of the lack of a standard or available burst demodulators. The circuitry is capable of

perfoming this function based on a burst specification. Please contact Datum Systems for specifics

of implementing this function and available burst protocols.

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Datum Systems PSM-500L Bedienungsanleitung Seite 32