Kantronics KPC-9612, Getting Started And Reference Manual

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KPC-9612 Version 5.2 July 19, 1994
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KPC-9612 Jumpers
There are several junipers in the KPC-9612 which can be used to configure various options. The
jumpers are listed below in sequential order as a reference.
J1 (1200 baud equalization) This two-pin jumper is used to set the equalization for the 1200
baud modem. When placed on both posts, no equalization is selected, and when placed on
one post, partial equalization is used. See the CALIBRATION/EQUALIZATION section for de-
tails. (DEFAULT: no equalization)
J2 (NOR/HT) When placed on the center post and the post marked NOR, this configures the
AFSK output line of port 1 (1200 baud) for use with base radios. When placed on the center
post and the post marked HT, this configures the AFSK output line to also serve as the PTT
line for HT radios. (DEFAULT: nor)
J3 (9600 watchdog) This jumper enables/disables the watchdog timer for the 9600 baud modem.
When placed on one post, the watchdog timer is active, and when placed on both posts, the
timer is disabled. (DEFAULT: enabled)
J4 (1200 watchdog) This jumper enables/disables the watchdog timer for the 1200 baud modem.
When placed on one post, the watchdog timer is active, and when placed on both posts, the
timer is disabled. (DEFAULT: enabled)
J5 (1200 baud AFSK drive) This two-pin jumper selects the hi-range or low-range for the 1200
baud AFSK output level. Placing the jumper on one pin only selects the low range, and placing
the jumper on both pins selects the high range. (DEFAULT: low)
J6 (9600 dc coupling) This two-pin jumper allows the transmit signal from the 9600 baud modem
to be dc coupled to your radio. When placed on both pins, the transmit signal is dc coupled,
and when placed on one pin only, the signal is ac coupled. (DEFAULT: ac)
J7 (9600 baud drive) This two-pin jumper selects the hi-range or low-range for the 9600 baud
output level. Placing the jumper on one pin only selects the low range, and placing the jump-
er on both pins selects the high range. (DEFAULT: hi)
J8 (9600 equalization) This three-pin header selects fixed or variable equalization for the 9600
baud modem. When placed on the center post and 1, fixed equalization is used. When placed
on the center post and 2, equalization is adjusted using resistor R-33. (NOTE: The KPC-9612
will not operate 9600 baud if this jumper is on one post only.) (DEFAULT: fixed)
J9 (9600 receive level) This two-pin jumper sets the 9600 baud modem receive level for a high-
level signal from the radio or a low level signal. When placed on both pins, a low level signal is
expected from the radio, and when placed on only one pin, a high level signal is expected.
(DEFAULT: hi)
J10 (9600 loopback) This two-pin jumper allows you to perform a loopback test on the 9600 baud
modem. When placed on both pins, the transmit signal from the 9600 baud modem is con-
nected to the receive input of the 9600 baud modem. When placed on one pin only, the loop-
back is disabled. You should be sure the loopback is disabled for normal operation. NOTE:
Transmit level and receive equalization have no effect in loopback mode. (DEFAULT: disabled)
J11 (RAM +5 V) This jumper is not installed in amateur units. If the clock chip (U22) is not instal-
led, this jumper must be installed to p5V to the RAM.