Connect Systems Inc. - Model 9800 Page 8
P8 RX VOX: Receiver VOX sensitivity: Used in VOX simplex
mode only. Sets RX audio triggering
sensitivity. Should be fully CW in VOX
simplex applications. Reduce setting when
used through repeaters or trunked systems if
land line cannot respond to mobile during
hangtime due to noise or tone on the
repeater's carrier.
NOTE; When operating through a repeater as a
control station patch, it is best to connect
the AUDIO IN to the volume control and make a
COS connection to the receiver.
P9 TEL VOX: Telephone VOX sensitivity: Sets telephone VOX
sensitivity for VOX mode, VOX enhancement for
sampling mode, call progress tone detection,
and dial click detection. Adjust to suit. Mid
rotation is about right for most
applications.
Occasionally P9 may require critical
adjustment to allow proper decoding
(counting) of incoming pulse digits when
using the optional dial click detector.
P10 L->M Land to mobile level: Press the C/D
(Connect/Disconnect) switch so that a
dialtone is heard. Adjust P10 until the
dialtone produces about 3 Khz. of
modulation deviation. Cut JP-3 if required.
P11 COS COS Threshold level: This control is only
adjusted if you are using the COS input and
JP-6 has been strapped. Measure the voltage
at TP-1 with no signal. Then measure the
voltage again with a signal applied. Adjust
P-11 until the voltage reading at TP-2 is
approximately midway between the two readings
previously obtained at TP-1.
For example: If TP-1 reads 2 volts with no
signal, and 4 volts with a signal applied to
the receiver, TP-2 would be set to read
3 volts.
Important: If JP-6 is properly strapped and
P11 properly adjusted, the Noise LED will be
illuminated when there's no signal. The noise
LED should go out when a signal is received.
