PK-88 OPERATING MANUAL
INSTALLATION
2 - 11
PK-88 - 27
your transmitter automatically after 60 (sixty) seconds. As you perform the
following adjustments, unkey periodically, then rekey the transmitter by typ-
ing
[K]
.
10.
Press the
[K]
key on the keyboard to key, the transmitter. You should hear a contin-
uous tone in the monitor output.
11.
Tap the space bar several times until you hear the higher-pitched of the two tones
('Space').
12.
With the PK-88 keying the transmitter, adjust the transmit audio level as follows:
o
Rotate the microphone gain control clockwise to about one-quarter open.
o
Turn the PK-88's internal AFSK Output Level adjustment screw (VR1) clock-
wise (CW) until the ALC meter shows only a very small deflection from the
unmodulated reading. Check the radio's output current or output power indi-
cators.
NOTE:
Verify the radio manufacturer's output device current specifications.
o
Adjust the AFSK Output Level control until the radio's indicators show ap-
proximately fifty percent (50 %) of the manufacturer's rated full-power read-
ing.
EXAMPLE:
If the radio's output device current specification for CW operation is
200 mA, set the AFSK Output Level control and your microphone gain
control so that the output device current indicates approximately 100
mA.
13.
Type
[Q]
to QUIT the calibrate mode.
You have now set the PK-88's transmit audio output level and the SSB radio's micro-
phone gain control to an approximately correct level for Packet-Radio operation.
14.
With your radio in receive mode, tune the receiver to a clear, unoccupied frequency.
15.
Set the receiver's audio volume control (AF Gain) to the position you would normally
use for CW reception, or to a position such that the DCD LED on the PK-88 is just lit
by the output noise signals from your receiver.
This is the approximate receiver audio output level for best receive performance
from the PK-88's modem.
2.9
Command List Displays
Type the command word
display
. Your screen will show:
cmd:
display
DISPLAY A,C,I,L,M,T,Z
2.9.1
Display Complete Command List
At the
cmd:
-prompt, type the command word
DISPLAY Z
. The PK-88 displays the entire
list as shown in APPENDIX A.
