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USER'S GUIDE
1.3.2.2
Modem Characteristics
Demodulator:
Receive Bandpass:
VHF Packet:
HF (except CW):
CW:
Modulator:
Output Level:
1.3.2.3
Processor System
Protocol conversion:
RAM:
ROM:
Hardware HDLC:
1.3.2.4
Input/Output Connections
Radio Interface:
Input/output Lines:
External modem
Direct FSK Outputs: Normal and reverse
Oscilloscope Outputs: Mark (Stop) and Space (Start)
CW keying Outputs: Positive: +100 VDC max. at up to 100 mA
Terminal Interface:
Input/Output:
Terminal Data Rates: Auto-baud selection of 300, 1200, 2400, 4800 and 9600 BPS.
PK232UG Rev. B 9/86
Limiter-discriminator type, preceded by an eight-pole Cheby-
shev 0.5 db-ripple bandpass filter.
Automatically switched by operating mode.
Center frequency 1700 Hz
Center frequency 2210 Hz, Bandwidth 450 Hz
Center frequency 800 Hz, bandwidth 200 Hz
Low-distortion AFSK sine wave function generator, phase-con-
tinuous AFSK.
5 to 100 millivolts RMS, adjustable by rear-panel control.
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
connector:
Five-pin TTL - TXD, RXD, DCD, PTT, Ground
Negative: -30 VDC max. at up to 20 mA
Standard RS-232C 25-pin DB25 connector
RS-232 with full handshake (hardware and software)
Use only wires 1-8 and 20
TBAUD adds 110, 150, 200 and 600 BPS.
1-2
INTRODUCTION
16
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