RFL Electronics 9780 - Table 17-20. Logic Straps; Table 17-21. Logic Straps

RFL 9780 RFL Electronics Inc.
April 8, 2003 17-92 (973) 334-3100
Table 17-20. Logic Straps
Logic with straps in position:
JP1-A JP2-A JP5-B
Input Name Input Status at TB9 Output Status at
C12
Fail#1 (TB9-1&-2) 12V 0V (OK)
Fail#2 (TB9-3&-4) 12V
Fail#1 (TB9-1&-2) 0V 5V (FAIL)
Fail#2 (TB9-3&-4) 0V
Fail#1 (TB9-1&-2) 12V 5V (FAIL)
Fail#2 (TB9-3&-4) 0V
Fail#1 (TB9-1&-2) 0V 5V (FAIL)
Fail#2 (TB9-3&-4) 12V
Table 17-21. Logic Straps
Logic with straps in position:
JP1-B JP2-B JP5-B
Input Name Input Status at TB9 Output Status at
C12
Fail#1 (TB9-1&-2) 12V 5V (FAIL)
Fail#2 (TB9-3&-4) 12V
Fail#1 (TB9-1&-2) 0V 0V (OK)
Fail#2 (TB9-3&-4) 0V
Fail#1 (TB9-1&-2) 12V 5V (FAIL)
Fail#2 (TB9-3&-4) 0V
Fail#1 (TB9-1&-2) 0V 5V (FAIL)
Fail#2 (TB9-3&-4) 12V
17.9.2 RECEIVER LINE INTERFACE AND PROIVISION FOR EXTERNAL
METER
The RX Line Interface section provides termination and surge protection for the receive signal.
Termination is selectable via JP101 for 50 ohm, 75 ohm or high impedance. E101 is a 90 volt high-
energy spark gap and along with R105 and CR101 provide maximum surge protection for the 9780
receiver. In addition, connections are provided for an external power meter.
17.9.3 TX SCALING AND EXTERNAL POWER AMP SECTION
This section provides transmitter signal scaling and output buffering via U1 and associated variable and
fixed resistors. Additionally, provisions for two external power amplifier alarm signals are located on
this module. The standard input level is 12 volts selected via JP3 and JP4 position C. The alarm inputs
are capable of handling other voltage levels via components associated with JP3-A&B and JP4-A&B.
This can be provided for future applications. Alarm inputs are isolated via U3 and U4 and any
combination of logic can be selected via jumpers JP1, JP2 and JP5.