Applied Systems Engineering Bell-202T Manual de usuario descargar pdf (Pagina 7)

Applied Systems Engineering, Inc.

Page 3

Jumper Settings for Box Mount (5006) Modem (Rev E)

• Bold Italics indicates factory settings

Jumper Usage Notes Jumper Meaning

1-2 DTR

JP1 DTR/DSR

• Uses DTR as “clear-to-send” signal, instead of CTS

• Uses DSR as “request-to-send” signal instead of RTS

• Normal mode (RTS/CTS) has no jumpers installed

3-4 DSR

1-2 -45 dB JP2 Receiver

gain

• Sets receiver gain to –35 or –45 dB

• Exactly one jumper must be installed

3-4 -35 dB

JP3 Receiver

squelch

• For half duplex mode, adds 156 millisecond delay between

end of transmitted message and enabling receiver

• Receiver constantly enabled if not installed

1-2 156 msec

1-2

3-4

2-wire

5-6

JP4 2W/4W

• Selects 2-wire (half duplex) or 4-wire (full-duplex) operation

• Exactly 2 jumpers must be installed

7-8

4-wire

JP5 Carrier

• Selects switched or constant carrier

• Remove jumper for switched carrier

1-2

Removed

JP6 900Hz soft

carrier

turn-off

• Installed if 900Hz-carrier turn-off is not required.

• Removed if 900Hz-carrier turn-off is required.

• Note: Must be installed for V.23 CCITT operation

1-2 Installed

JP7 Transmit

level range

selection

• If installed, SW1 settings interpreted as 0 to –15 dB

• If removed, SW1 settings interpreted as –16 to –31 dB

1-2 Installed

1-3

2-4

3-5

JP8 Power

Supply

• If 1-3 and 2-4, input power must be regulated 5 VDC

• If 3-5 and 4-6, input power can be 12 to 160 VDC

4-6

12-160 V

3-5

JP9 Reserved

• These jumpers are factory installed and must not be altered

after shipment.

4-6

Installed

JP10 Earth

• Jumper inserted connects (-) power input to (S) shield on

terminal block

1-2

Removed

1 2 3 4 5 6 7 8 9 10 11 12 13

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Applied Systems Engineering Bell-202T Manual de usuario Pagina 7

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