User's Manual

120 20170-302 Paragon
PD
Technical Manual
14
3.2.1.2 Clearing Errors
Major and minor error LED indications remain lit
on the front panel until:
• The unit is RESET
• The unit is powered OFF and ON again
• PF 1 is pressed
The PF 1 switch can be pressed at any time to
clear an error display without affecting normal
operations.
3.2.1.3 Test Transmissions
To select a pattern and begin transmission, start
by pressing and holding PF1. It beeps once, all
five RS232 LEDs light; listen for a second beep
followed by a third beep. After two seconds, the
unit beeps and goes in “TX Select” mode with
only the three rightmost RS-232 LEDs now used
as selection indicators. Only release PF1 after the
third beep.
Following release:
• Start of selection must be made within two
seconds. If not, the unit will default to pattern
one and start test transmitting.
• PF1 may be pressed more than once. The
number of times it is pressed determines the
type of pattern that will be transmitted ac-
cording to Table 3.
• Each pressing of PF1 extends the two-second
timer.
• The three rightmost RS-232 LEDs display
are used to indicate TX mode selection as
shown in Table 2.
Table 2 - TX mode selection LEDs indications
Binary TX mode LED indications
TX pattern
selected
FT LED RD LED TD LED
1OffOffOn
2 Off On Off
3 Off On On
4OnOffOff
5OnOffOn
6OnOnOff
7OnOnOn
Once the type of transmission is selected, stop
pressing PF1, allow the two-seconds timer to run
down. Automatically, the BDLC
PD
turns its
transmitter ON, sends the selected “test pattern”
for 55 seconds and turns its transmitter OFF. The
TX LED in the RF group of indicators lights in
red while test transmitting. Pressing PF1 while
the 55 seconds test is in progress stops the test.
At the end of test transmission, BDLC
PD
opera-
tion returns to normal and the RX LED lights in
green (monitoring normal transmitter activity).
Table 3 - Test Transmissions
DGMSK Paragon
PD
# times
PF1 is
pressed
8000 b/s 9600 b/s 19200 b/s
1 2000 Hz Dotting 2400 Hz Dotting 4800 Hz Dotting
2 4000 Hz 4800 Hz 9600 Hz
3 100 Hz Square wave
4 Random data Random data Random data
5 Unmod Unmod Unmod
6
1000 Hz sine
beacon mode
1000 Hz sine
beacon mode
1000 Hz sine
beacon mode
7
1000 Hz sine wave
Adjustment tone
xRC4FSK Paragon
PD
# times
PF1 is
pressed
32000
b/s
25600
b/s
19200
b/s
16000
b/s
14400
b/s
1
4000 Hz
Dotting*
3200 Hz
Dotting*
2400 Hz
Dotting*
2000 Hz
Dotting*
1800 Hz
Dotting*
2
Do not
use
Do not
use
Do not
use
Do not
use
Do not
use
3
100 Hz
Square
wave
100 Hz
Square
wave
100 Hz
Square
wave
100 Hz
Square
wave
100 Hz
Square
wave
4
Random
data
Random
data
Random
data
Random
data
Random
data
5 Unmod Unmod Unmod Unmod Unmod
6
1000 Hz
sine
beacon
mode
1000 Hz
sine
beacon
mode
1000 Hz
sine
beacon
mode
1000 Hz
sine
beacon
mode
1000 Hz
sine
beacon
mode
7
1000 Hz
sine
wave
Adj. tone
1000 Hz
sine
wave
Adj. tone
1000 Hz
sine
wave
Adj, tone
1000 Hz
sine
wave
Adj, tone
1000 Hz
sine
wave
Adj, tone
* Dotting with reduced amplitude
Notes:
- For DGMSK models, a dotting pattern consists of an
alternating series of bits.
- For the xRC4FSK models, a dotting pattern consists of
an alternating series of bits where only the lowest-level
symbol’s modulation is used.
- The square wave is used to check transmitter low fre-
quency balance..
- Pattern 6 produces a transmission of approximately 55
seconds followed by about 55 seconds of silence.
Initial transmission in a sequence may be shorter than
55 seconds. TX LED stays steadily red for duration of
the test. Press PF1 to terminate beacon mode.