Atec IFRMLS800 User Manual
Page 3
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Accuracy
±10% of setting
Beam Level
Adjustable relative to preamble (Note 6, 8 and 10)
Range
-14.0 to +13.0 dB
Resolution
1.0 dB steps
Accuracy
±1.0 dB, -3.0 to +13.0 dB
±2.0 dB, -14.0 to -4.0 dB
SIDE LOBES
Relative to beam level
Level
-20.0 dB, ±1.0 dB
Main Path to Multi-path
±1.0 dB tracking error
FADE RATE
Frequency Range
Selectable 0.05, 1 and 1000 Hz
Accuracy
±1.0 %
Steps
Eight discrete steps that approximate a sine wave
Clearance Pulses (Note 9)
Position
Two pulses spaced equidistant from 0.0°
Angle Resolution
±0.05°
Angle Accuracy
±0.05°
Pulse Width
50.0
µ
s, ±5.0
µ
s
AMPLITUDE
Range
-3.0 to +13.0 dB
Resolution
1.0 dB steps
Accuracy
±1.0 dB
A
AD
DD
DIIT
TIIO
ON
NA
AL
L F
FU
UN
NC
CT
TIIO
ON
NS
S
AZ to EL RATIO
Selectable so Azimuth to Elevation function ratio is 0 or -75 dB
Accuracy
±2 dB
Interference Modulation
Propeller Modulation
Frequency
Variable 1 to 199 Hz
Resolution
1.0 Hz steps
Accuracy
±1%
Duty Cycle
-12 dB, ±2 dB applied for 15%, ±1%
Sync
Not in sync with any function
6.75 HZ MODULATION
Frequency
6.75 Hz
Accuracy
±1%
Level
Selectable ±6.0 dB square wave modulation to main beam (Note 6
and 10)
Accuracy
±1.0 dB
Sync
Not in sync with any function
MORSE CODE
Selection
Off, selectable or Continuous Tone
OSCILLOSCOPE SYNC
Selection
Selectable to occur at start of any function, basic or auxiliary data
word
Amplitude
Positive TTL pulse approximately 14
µ
s wide.
Note:
Sync control specifies to which function or data word the tests
in Table 1 apply.
FUNCTION
APPLICATION
P PARITY
CONTROLS PREAMBLE PARITY
6.75 Hz
ENABLES OR DISABLES 6.75 Hz MODULATION
UPDATE
CONTROLS % UPDATE RATE
FADE RATE
CONTROLS FADE RATE (APPLIED TO MULTI-PATH
BEAM)
SYMMETRY
CONTROLS BEAM SYMMETRY
PROP MOD
CONTROLS PROPELLER MODULATION
FREQUENCY
PFE
MEASUREMENT OF PATH FOLLOWING ERROR
CMN
MEASUREMENT OF CONTROL MOTION NOISE
Table 1 - Oscilloscope Sync
FUNCTION UPDATE RATE
Selection
100%, 75%, 55%, 45%, 25% and 0%
Accuracy
±3.9 %
FUNCTION
UPDATE RATE
AVERAGE RATE OVER 10
SECONDS
AZ
100 %
13.0 ±0.5 Hz
HiAZ
100 %
39.0 ±1.5 Hz
BAZ
100 %
6.5 ±0.25 Hz
EL
100 %
39.0 ±1.5 Hz
FUNCTION PREAMBLE PARITY
Selection
Function identified by Oscilloscope Sync selection is candidate to have
its parity bits individually inverted to provide a change in parity.
SCANNING BEAM TIME SYMMETRY
Selection
0 (OFF), ±60
µ
s in 1
µ
s steps referenced to proper timing from pre-