RADIOBEACON TRANSMITTER
ND500 II (125 WATTS) DOUBLE SIDEBAND - NO VOICE
Page 5-20
15 September 2003
Table 5-2 Functional Test Check List
ESTABLISHED REFERENCES
VOLT READING
B+ VOLTS______VDC
24 VOLTS______VDC
+15 VOLTS______VDC
CORRECTION FACTORS:
Carrier Frequency........................... __________kHz
Modulation Frequency.......................__________Hz
Intended Carrier Level ................... _________Watts
Intended Modulation Depth ............... __________ %
B+ VOLTS ..................................... __________VDC
DC CURRENT ................................... _______Amps
Carrier Level Fault Threshold ........ _________Watts
Mod Depth Fault Threshold............... __________ %
Shutdown Delay...............................______Seconds
Station Identification Code ................ ____________
Standby #1 Code ...........................______________
Standby #2 Code .............................. ____________
FUNCTIONAL TEST RESULTS
PARA
FUNCTION OBSERVED
TEST RESULTS
TOLERANCES
5.3.2.2
(k)
Lamp status
Accept
¨
Reject
¨
Specified lamps on
(m)
Lamps status
Accept
¨
Reject
¨
Specified lamps on
5.3.2.3
(b)
B+ VOLTS
______VDC
±5% of reading recorded as
Established Reference
5.3.2.4
(b)
+24 VOLTS
______VDC
Between 22.0 and 26.0V
5.3.2.5
(b)
+15 VOLTS
______VDC
Between 14.0 and 16.0V
5.3.2.6
(b)
-12 VOLTS
______VDC
Between -11.0 and -13.0V
5.3.2.7
(b)
ATU +15 VOLTS
______VDC
Between 14.0 and 16.0V
5.3.3
(j)
RF drive alarm
______VDC
Between 22.0 and 26.0V
(p)
Carrier Frequency
______kHz
±0.0005% of assigned Fc
(s)
RF drive (amplitude)
______V
Between 46 and 66V peak-peak
(v)
RF drive level
______VDC
Between 23.0 and 33.0V
5.3.4
(f)
PWM oscillator frequency
______Hz
Between 69.8 and 70.2Hz
(l)
Mod drive alarm
Accept
¨
Reject
¨
Rectangular waveform with
positive portion between 60 and
70% of waveform period
(x)
PWM ramp waveform
Accept
¨
Reject
¨
Triangular waveform with
negative peak at ground.
5.3.5
(f)
Reflected Power (CW)
______Watts
Near zero watts
(i)
DC current (CW-125W)
______Amps
Between 3.3 and 3.7A (125W),
<650 kHz
Between 2.6 and 3.5A (100W),
>650 kHz
(k)
B+ Volts (CW-125W)
______VDC
Between 46 and 52V
(p)
RF monitor (CW-125W)
______V
Between 10.0 and 14.0 volts p-p
125W, <650 kHz
Between 10.0 and 14.0 volts p-p
100W, >650 kHz
