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5.4.2
OUTPUT SETTINGS
Selecting the Output Settings screen brings the display shown in Figure 9.
Using this menu, configure the primary functions of the Transmit (output) interface. Each of the fields contained on the
display are explained below. The Output settings control the data and clock characteristics, including data content, Doppler
shifting, error insertion and blanking.
Table 4: Selectable Definitions of the actions field on the Status Screen
Field
Clock
Bit Rate
Type
Code
Polarity
Doppler Shift
Operation
Doppler Mode
Cycle Time
Start
End
Error Insertion
Error Type
Error Rate
rd
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Figure 9: TX SETUP SCREEN
Definition
Select Internal or External clock. This field is automatically modified to show DOPPLER if the
DOPPLER function is selected and enabled.
Data rate of internal clock from 100 bps to 75,000,000 bps
The maximum rate of 75Mbps is valid, but the module is only specified to operate up to
50Mbps. At higher rates, careful attention must be payed to cabling and termination.
Selects the output data source as PRN or PCM data
NRZ-L, NRZ-M, NRZ-S, BiP-L, BiP-M, BiP-S, RNRZ-15, DM-M, DM-S
+clk/+dat, -clk/+dat, +clk/-dat, -clk/-dat (Refer to Figure 10:
SETTINGS
and Figure 11:
The Doppler function is enabled (On) by selecting Single sweep, Cycle sweep or Sawtooth
sweep. The Doppler function is disabled by selecting Off.
Determines the bit rate change curve. Selecting Curve causes the output bit rate to follow a
frequency change curve that emulates the data rate changes received from an orbiting satellite.
Selecting Linear results in a bit rate change profile that is a linear ramp function.
Sets the time to cycle from the START bit rate to the END bit rate; programmable from 1 to 600
seconds.
Starting frequency from 100 bps to 50,000,000 bps
Ending frequency from 100 bps to 50,000,000 bps
No Errs, Periodic, Random
1.0E-2, 1.0E-3, 1.0E-4, 1.0E-5, 1.0E-6
DATA POLARITY SETTINGS
8
09.21.2017
F1
F2
F3
F4
F5
CLOCK POLARITY
)
A
L
, I
POGEE
ABS
.
NC
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