Demodulator (Receive) Adjustments; Functional Tests - AEA PK-232 Technical Reference Manual

PK-232 TECHNICAL MANUAL
6.2.2. Demodulator (Receive) Adjustment
1. Connect the oscilloscope to U30 pin 14.
2. Adjust R81 for maximum signal amplitude.
3. Press the [SPACE BAR]. The on-screen frequency counter should read 2310 Hz.
4. Connect the oscilloscope to U30 pin 1.
5. Adjust R96 for maximum signal amplitude.
6. Type Q
6.3. Functional Test
1. Type MY AEA
The monitor should display
2. Type C AEA
The monitor should display
3. Type a few characters and press [RETURN]. These same characters should be
echoed back to the terminal.
4. Type ^C
The monitor should display
5. Type K
6. Adjust the PK-232's
PK-232's front panel is lit. Type several characters and a [RETURN]. Observe the
SEND LED
7. Adjust the
Observe that the
echoed on the screen.
8. Adjust R155 (AFSK output level) to 200 millivolts peak-to-peak as measured at the
junction of C59 and R160.
9. Type ^C.
10. Type VHF OFF
The monitor should echo
11. Type HB 300
The monitor should echo
12. Type K
13. Type several characters followed by a [RETURN].
PK232TM Rev. A 5/87
to exit the calibration routine.
[RETURN].
MYCALL was AAA
[RETURN].
*** CONNECTED TO AEA
<CTRL-C>.
CMD:
[RETURN] to enter CONVERSE mode.
THRESHOLD
on the front panel. The
THRESHOLD control counterclockwise until the
SEND LED
[RETURN].
VHF was ON
[RETURN].
HBAUD was 1200
[RETURN].
CHAPTER 6 – ADJUSTMENTS AND TESTS
.
.
control clockwise until the
SEND LED should NOT be lit.
is lit and that the characters that were typed are
.
.
6-3
.
on the
DCD LED
DCD LED is extinguished.
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