Programming Using An External Computer - HP 8920A User Manual

Programming Using an External Computer

Writing programs on an external computer using BASIC allows you to write and
edit the NMT program, and then store it on mass media (memory card, RAM disk,
external disk).
Since some NMT syntax used are not valid BASIC language commands, a special
program structure is required.
Program Structure
The following rules must be followed when writing NMT programs to be stored
on mass media:
• All statements in the program must appear as BASIC comments, beginning with an ex-
clamation point (!) following the line number. REM statements cannot be substituted
for the (!) symbol.
• All statements desired as comments in the NMT program are indicated by a double ex-
clamation point (!!) as the first entry following the line number.
• The first line of all NMT programs must have !!NMT following the line number.
• When storing NMT programs, file names must begin with the letter n (either lower or
upper case). The n is removed before the filename is shown in the menu for the Load
Test field. (For example, a file saved as nNMT1 appears as NMT1.) Program Exam-
ple
The following example can be saved on mass storage, and then retrieved and run
using the decoder's
Load Test
10 !!NMT
20 !BEGIN
30 !SET 1 5
40 !10 SEND 1A
50 !SEND 2A
60 !REPEAT 1 10
70 !EXIT 0
80 !END
Chapter 8, Signaling Decoder Screen
field:
Creating NMT Tests
329