1.4 PK-232 Specifications
As part of its program of product improvement, AEA reserves the right
to make changes in this product's specifications. Changes may also be
made to the information in this document and incorporated in revisions
to this manual. Prices and specifications are subject to change
without notice or obligation.
1.4.1 Modem Characteristics
Demodulator: Limiter-discriminator type, preceded by
an eight-pole Chebyshev 0.5-dB ripple
bandpass filter
Receive Band-pass: Automatically switched by operating mode
VHF packet: Center frequency 1700 Hz,
bandwidth 2600 Hz
HF (except CW) Center frequency 2210 Hz,
bandwidth 450 Hz
CW Center frequency 800 Hz,
bandwidth 200 Hz
Modulator: Low-distortion AFSK sine wave function
generator, phase-continuous AFSK
Output Level: 5 to 100 millivolts RMS into 600 Ohms,
adjustable by a rear-panel control
1.4.2 Processor System
Protocol conversion: Zilog Z-80 microprocessor
RAM: 32 kilobytes
ROM: Up to 128 kilobytes of ROM may be used
Hardware HDLC: Zilog 8530 SCC
1.4.3 Input/Output Connections
Radio Interface: Two five-pin Molex connectors,
selectable on the front-panel
Input/Output Lines Receive audio
Transmit audio
+/- Push-To-Talk (PTT) (+25 / - 40 VDC)
External squelch input
Ground
External modem connector Five-pin Molex- TXD, RXD, DCD, PTT and
Ground (TTL levels)
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
Negative: -30 VDC max, at up to 20 mA
Terminal Interface: RS-232-C 25-pin DB25 connector
Input/Output RS-232-C with full handshake (hardware
and software)
USE WIRES 1 THROUGH 8 AND 20 ONLY.
Terminal Data Rates Autobaud selection of 110, 300, 600,
1200, 2400, 4800 and 9600 BPS. TBAUD
COMMAND adds 150, 200 and 400 BPS.
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