Hal Communications CWR6850, Инструкция по эксплуатации

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CHAPTER 5 PAGE 37
5. A shielded cable between the transmitter Morse code key input and the CWR685Q SW. OUT -
CW connector. Either a positive or negative voltage keying circuit may be connected to this
jack. Again, this cable can be a high fidelity phono cable with the transceiver plug end modified
as appropriate. This connection can often be combined in a stereo cable with the receiver
audio cable (item 2) when connections are made to a transceiver.
6. Connect the keyboard to the CWR6850 with the cable and connector furnished.
7. Connect the CWR6850 to a DC power source capable of +12 to +14.5 VDC output with a 1.6
Ampere load.
*** CAUTION ***
Be sure that you connect the RED wire to the positive terminal and the BLACK wire to the negative
terminal. Reverse power connection may damage both the CWR6850 and the DC power source!
If you use an AC power supply to generate the +12 VDC, use a grounding type of AC connector or
provide a separate power ground return for the power supply to prevent any electrical shock.
5.2 Use of the TTL Data Connections
The CWR6850 includes input and output connectors for use with TTL data devices ("FSK TTL IN"
and "FSK TTL OUT"). These I/O connections can be used with any TTL compatible device. The TTL
voltage standard is as follows:
MARK = +2.7 volts (+5.0 volts maximum)
SPACE = +0.6 volts (0.0 volts minimum)
UNDEFINED: +0.6 volts to +2.7 volts
Notice that the voltage levels of the TTL standard are NOT compatible with those of RS232 data
connections. Do not be misled by some claims of direct TTL - RS232 compatibility; damage may be
caused to one or both units! The TTL I/O connections may be used for connection to printers,
computers, or other TTL data devices.
The TTL output is always available for all ASCII and Baudot signals; the TTL input is selected with
the FSK DEMOD. - INT / EXT switch on the rear panel. Leave the switch in the "INT" position
whenever you wish to use the internal demodulator for receiving Baudot or ASCII signals.
5.3 Use of the SW-OUT FSK Connection
Some amateur transmitters have provision for direct FSK keying of an internal oscillator. These FSK
inputs typically require that a control line be switched between open circuit and ground for the
mark and space RTTY conditions. The SW-OUT FSK rear panel jack may be used to control such
transmitter inputs. The internal transistor switch of the CWR6850 has maximum ratings of +100
VDC and +100 mA DC; negative voltages can not be switched. The SW-OUT FSK standard configu-
ration shows an "open circuit" for mark condition and a "closed circuit" (transistor switch "on") for
space. However, an internal jumper of the CWR6850 allows this polarity to be reversed, setting
mark to "on" and space to "off". Refer to section 6.4 for location of the jumper and connections to
be made. It is not recommended that you use this SW-OUT FSK jack to key a high-voltage RTTY
loop circuit; use an optical isolator driven from the TTL output instead.