Philips SPENDEX 40 Maintenance Manual page 36

NATO CONFIDENTIAL
S P E N D E X 4 0 U A 8 2 5 1 / 0 0 A N D / O l L I M I T E D M A I N T E N A N C E M A N U A L
Jumper 3
By means of jumper 3 the communication interface can be set on V22 or
B e l l .
Communication interface
Position of jumper 3
V22
B e l l
not inserted
PE3
Jumper 4
It is not important whether jumper 4 is inserted in position PE4 or
not (jumper 4 is not inserted).
Jumpers 5. 6 and 7
With the jumpers 5, 6 and 7 the output level of the modem can be set
from -14 dB...O dB in steps of 2 dB.
Output
level (dB)
Position of jumpers
Jumper 5 Jumper 6 Jumper 7
-14.0
-12.0
-10.0
- 8 . 0
- 6 . 0
- 4 . 0
- 2 . 0
0.0
not inserted
P E 5
not inserted
PE5
not inserted
PE5
not inserted
PE5
not inserted
not inserted
P E 6
P E 6
not inserted
not inserted
P E 6
P E 6
not inserted
not inserted
not inserted
not inserted
PE7
PE7
PE7
PE7
Remark: the level of the output modem signal can be accurately
adjusted with the help of potentiometer R18 on the line
interface board (see § 5.13.5).
9922 154 13431
NATO CONFIDENTIAL
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