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PK-232 TECHNICAL MANUAL
1.4.2
Modem Characteristics
Demodulator:
Receive bandpass:
VHF packet:
HF (except CW):
CW:
Modulator:
Output Level:
1.4.3
Processor System
Protocol conversion:
RAM:
ROM:
Hardware HDLC:
1.4.4
Input/Output Connections
Radio Interface:
Input/output Lines:
External modem connector Five-pin TTL - TXD, RXD, DCD, PTT, Ground
Direct FSK Outputs
Oscilloscope Outputs
CW keying Outputs
Terminal Interface:
Input/Output
Terminal Data Rates
PK232TM Rev. A 5/87
Limiter-discriminator type, preceded by an eight-pole
Chebyshev 0.5 dB ripple bandpass filter
Automatically switched by operating mode
Center frequency 1700 Hz, bandwidth 2600 Hz
Center frequency 2210 Hz, bandwidth 450 Hz
Center frequency 800 Hz, bandwidth 200 Hz
Low-distortion AFSK sine wave function generator,
phase-continuous AFSK
5 to 100 millivolts RMS, adjustable by rear-panel con-
trol
Zilog Z-80 microprocessor
16 kilobytes
Up to 48 kilobytes of ROM may be used
Zilog 8530 SCC
Two five-pin TTL connectors, selectable on the front
panel
Receive audio
Transmit audio
Push-To-Talk (PTT)
External squelch input
Ground
Normal and reverse
Mark (Stop) and Space (Start)
Positive: +100 VDC max. at up to 100 mA
Negative: -30 VDC max. at up to 20 mA
RS-232C 25-pin DB25 connector
RS-232 with full hardware and software handshake on
wires 1-8 and 20
Auto-baud selection of 300, 1200, 2400, 4800 and
9600 BPS. TBAUD adds 110, 150, 200 and 600 BPS.
1-2
CHAPTER 1 – INTRODUCTION
Page 8
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Table of Contents
Troubleshooting
