Hal Communications CWR6850, Instruction Manual

Page: 63 / 64

ADDENDUM PAGE 63
The following additions apply to your CWR6850:
1. The command "CTRL-B" may be used to give a "break" transmit condition. The "break" com-
mand in RTTY gives continuous SPACE condition output until a second CTRL-B is typed. The
"break" command in CW gives continuous "key-down" condition until a second CTRL-B is
typed. The CTRL-B command may only be used when the SEND-AUTO-RECEIVE switch is in
the SEND position. Activity of the "break" command is shown by the letter "B" in the status
line.
2. The double vertical arrow symbol ( ) at the right-hand side of the status line is used to indi-
cate that a command is waiting further input from the keyboard. Except for the ESC command,
commands showing (
) can be canceled with the RUBOUT key. Also, the command will be
canceled if a key other than the proper response is typed (for example any key except RETURN
after a CTRL-L). The exception is, of course, when CTRL-W is used to program the HERE IS
messages; only the RUBOUT ends HERE IS programming.
3. An open ( ) or closed ( ) right-arrow on the status line shows that data input from the
keyboard is not being accepted (such as during CTRL-L or CTRL-S operations). The arrow
changes from open (
) to closed ( ) when the operation is active. Only the RESET front
panel switch may be used to cancel the right-arrow commands.
4. The CTRL-Q:n command is used to change the display page from the keyboard as explained on
page 58 of the manual. When the CWR6850 is first turned on, the display is set to display page
1 on the screen; other pages may be set with the CTRL-Q:0, CTRL-Q:2, etc. commands. CTRL-
Q:5 will reset the display back to page 1. The CTRL-Q:5 return page may be set to any other
page with the following procedure: Use CTRL-Q:
n to select the desired "default" display page
and then type CTRL-Q:6. Now, the display will return to the new "default" page when CTRL-
Q:5 is used.
5. The following precautions apply when using the CWR6850 with the ICOM brand of HF trans-
ceivers (IC710, 720, 720A, 730):
a. When using SW-OUT FSK connection (see section 5.3 of the manual) to drive the direct
FSK connection of the ICOM transceivers, it is necessary to invert the normal sense of the
FSK output from mark = "on" to space = "on". To make this change, refer to section 6.4 of
the manual and short-across jumper JP-1 on the digital board (top board). See Figure 10.
for the location of JP-1. Refer to item (c) below for further considerations.
b. On the IC710 and IC720 (but NOT the IC720A), the FSK TTL OUT connection may be used
in place of the SW-OUT FSK connection for direct FSK, subject to conditions listed in (c)
below.
c. Measure the voltage at the FSK input terminal to the ICOM transceiver:
I. If a voltage larger than 5 volts is measured, use the SW-OUT FSK connection outlined in
step (a) above.
II. If no voltage is measured, use the FSK TTL OUT connection as discussed in step (b)
above.
d. Do NOT use the audio signal on pin 4 of the ICOM accessory connector for audio output
connection; connect the EXT-SP terminal of the ICOM to the AF IN RX connector of the
CWR6850 instead.
e. Use the REV position of the NOR-REV switch of the CWR6850.
f.
When transmitting CW, place a solder short across JP-2 on the digital board (top board) as
explained in section 6.4 of the manual.
g. If problems are experienced with transmit-receive control of the ICOM transceiver by the
CWR6850, it may be necessary to change the value of R50 on the digital board. R50 is lo-
cated at the center rear of the circuit board and is presently a 1500 ohm resistor. Because
of the high current relays used in the ICOM transceivers, it may be necessary to replace
the 1500 ohm resistor with a 470 ohm resistor. This has not been found to a problem in
our testing of the CWR6850, but may be present on some units due to ICOM production
variations between units.