Overload Lndi Cator Check; Frequency Standard Check - Racal Instruments 9916 Workshop Manual

5.36 Set the RESOLUTION switch to 1 Hz and check that the OVERFLOW indicator
lights.
Overload Indicator Check
5.37
Equipment required:
Item
Signal Generator
Power Ampl ifier
Coaxial leads
Table
3
Item No.
4
5
8
5.38 Connect the signal generator to the power amplifier input. Connect the power
amplifier output to the 'A' Channel input of the UUT.
5.39
Set the controls of the UUT as follows:
(1)
NOR!v\A l/BURST/CHECK switch to NOR!v\A
L
(2)
OPERA TE/STANDBY switch to OPERATE
(3)
Channel 'A' selected
(4) RESOLUTION switch to 10 Hz
5.40
Set the output of the signal generator to a level which will give a power amplifier
output of
8
volts r.m.s. at
60 MHz.
Check that the OVERLOAD indicator on the
UUT lights.
5.41
Reduce the input level to the power amplifier until the OVERLOAD indicator is
exti nguished. Check that the display shows the appl ied frequency.
Frequency Sta"ndard Check
5.42
Equipment required:
Item
Osci [Ioscope
Frequency Standard
T
piece
Coaxial leads
Table 3 Item No.
t;
2
3
6
8
5-11
9916 Vol.2