(2) The receiving LDF is loaded with a copyset, which consists of a bound sheet of paper and
a sheet of carbon paper. (A flimsy protective sheet of paper placed between the carbon surface and the
blank sheet is removed prior to use.) Ordinary carbon paper may be used; the carbon paper is placed on
top of the blank sheet of paper before mounting on the drum.
(3) During normal transmit/receive operations, the input copy and printed out copies are
unloaded automatically after completion of operations.
e. Self-test. Self-test is performed by activating the momentary action SELF-TEST switch
which initiates the built in test (BIT) functions.
(1) In Mode A the operator loads the LDF with a combined message and a copyset and
momentarily sets the switch to the SELF-TEST position. The BIT function causes three vertical lines to
be printed out on the left side of the copy along with the image scanned. If the vertical lines printed out
on the left-hand margin are straight, the self-test is successful.
(2) The operator may test Mode B operations by loading a message into the memory, then
use the SELF-TEST switch to print out the result.
Mode A Operations. Mode A operations described below function when the MODE/DATA
FORMAT (MODE A-COMP/COMP FEC/UNCOMP) switch (Figure 5) is set to the MODE A position.
The MEMORY LOAD switch and the NATO STD/ALT LDF (Mode B) switch are inoperable during
Mode A operations. When the sending and receiving LDFs in Mode A are powered up, interconnected
as described in paragraph 1-13.1.2 of TM 11-5815-615-10, and the documents loaded as described in
paragraph 1-13.1.3 of TM 11-5810-615-10, the sending/receiving operations can begin. The operators
communicate by telephone set or radio handset to ensure both LDFs are ready for operation. Mode A is
selected, and when the sending operator is satisfied that switch settings on both machines correspond,
the receiving operator presses the RCV push button. After hearing the receive-ready tone from the
receiving LDF, the sending operator presses the SEND push button. The message is scanned at the
sending LDF and printed out at the receiving LDF. When the transmission is complete, both machines
stop, the drums revolve one turn backwards, and both sent and received messages are ejected.
Mode B Operations. Mode B operations described below function when the MODE/DATA
FORMAT (MODE A-COMP/COMP FEC/UNCOMP) switch (Figure 5) is set to any position except
MODE A. All other switches except the ANLG/ANLG(V) DIGITAL switch are operable during Mode