Hal Communications CWR6850, Instruction Manual

Page: 36 / 64

CHAPTER 5 PAGE 36
CHAPTER 5
CONNECTIONS TO THE CWR6850
This section of the CWR6850 manual discusses how to connect the Telereader to your equipment.
Section 5.1 will discuss basic connections you may wish to make in a typical radio amateur station.
Later sections of this chapter discuss specialized connections.
5.1 Normal Amateur Station Connections
The basic minimum connections required for a transmit-receive station connection have been
shown in Figure 2 in Chapter 2; more elaborate connections are shown in Figure 4. The HAL cable
set "C2" makes the simple connections or you may fashion your own cables. The "basic required
connections" of Figure 2 are:
1. A good RF ground between all components of the system. Use heavy wire or 1/4" shield braid.
2. A shielded audio cable between the receiver speaker output and the CWR6850 AF IN - RX con-
nector. A high fidelity phono cable will do nicely.
3. A shielded audio cable between the transmitter microphone audio input and the CWR6850
AFSK OUT - TX connector. A stereo phono cable can be used for this and the KOS connection
described next. Note that the phono connector(s) will probably need to be cut-off on the trans-
mitter end of this cable and the correct microphone plug connected. Consult your owners man-
ual for the correct connector and pin numbers. The output level from the AFSK OUT jacks may
be adjusted if necessary with the AFSK GAIN control. Consult your transmitter manual and in-
sert a series capacitor if required as noted in Section 2.1.
4. A shielded cable between the transmitter microphone push-to-talk (PTT) input and the
CWR6850 SW. OUT - REMOTE connector (KOS for Keyboard Operated Switch). The other half
of the stereo cable used for transmit audio can be used for this connection. As above, consult
the transmitter manual for connector and pin numbers. The NPN transistor KOS switch will only
switch positive voltage PTT circuits directly; negative voltage PTT circuits will require an exter-
nal relay. This relay may be connected as shown in Figure 5.
CONNECTION KOS CIRCUIT (POSITIVE VOLTAGE)
CONNECTION TO KOS CIRCUIT (NEGATIVE VOLTAGE)
Figure 5 – KOS Circuit Connections