Racal Instruments 9916 User Manual

5.43 Connect the oscilloscope to monitor the 1 MHz OUTPUT socket on the rear panel
of the UUT. Connect a T piece to the frequency standard output and connect one
end of the T piece to the oscilloscope external trigger input.
5.44 Set the oscilloscope to External Trigger and to a time base of 1 f-Is/cm.
5.45 Verify that the amplitude of the monitored signal is at least 3 volts peak to peak.
5.46 Connect the free end of the T piece to the UUT rear panel EXTERNA L STANDARD
socket. Check that the trace observed on the osci Iloscope locks
r
and that the
EXTERNA L STAt'--IDARD indicator lights.
Internal Frequency Standard Ca I ibration
·.47 Equipment reguired:
Item
/
Osci Iloscope
Frequency Standard
Coaxia I leads
Table 3 [tern No.
2
3
8
5.43 Connect the oscilloscope to monitor the 1 MHz OUTPUT socket on the rear panel
of the UUT. Connect the frequency standard to the external trigger input of the
oscilloscope. Set the oscilloscope to External Trigger.
5.49 When the frequency standard and the UUT have been switched on for at least one
hour set the osci Iloscope time base speed according to the internal frequency
standard fitted. Adjust the internal frequency standard (if necessary) to ensure that the
drift of the displayed waveform is less than 1 cm in 10 seconds.
TABLE 10
Internal Frequency Standard Calibration
Freguency
Time Base Cycles of Woyeform
Standard
Setting per cm
9442 (04A) lOOns/cm
t;
o .1
9421 (04B)
lOOns/cm
O. 1
11 -1254 (04C)
f fJs/cm
I
1
5-12
- 9916 Vol.2

Racal Instruments 9916 Specifications

General

Brand	Racal Instruments
Model	9916
Category	Measuring Instruments
Language	English