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subject to change without notice.
August 2012 Page 7 of 10 Revision B
Connect the equipment as shown in Figure 2, then proceed as follows:
(a)
Increase power from the signal generator to attain an output
power measurement of 1 watt as indicated on the output power
meter.
(b)
Measure input power and calculate gain. Gain should be a
nominal 40 dB
(c)
Vary the frequency of the sweep generator across the band
from 500 KHz to 1000 MHz. Note that the variation of gain is
/- 2.5 dB
3.3 Measurement of Harmonics
Equipment required:
(a)
Sweep/Signal generator
(b)
Attenuator, 20 dB
(c)
Power Meter - HP434A
(d)
Spectrum Analyzer
Connect the equipment as shown in Figure 3 then proceed as follows:
(d)
Adjust the sweep/Signal generator at a CW center frequency of
0.5 MHz for an indicated output of 1.0W on the power meter.
(e)
Using the spectrum analyzer, check that the level of harmonics
are less than -17 dB with respect to the carrier.
(f)
Vary the frequency of the generator from 500 KHz to 1000 MHz,
the harmonics should remain at -17dBc or below.
Chapter 4 Maintenance
4.1
Introduction
The E&I 601L RF amplifier requires no periodic maintenance. The instrument is
unconditionally stable and is fail safe under all load conditions. Damages can
only be externally caused by an input signal in excess of the specified IV RMS
maximum.
This chapter therefore, deals only with certain fundamental procedures for fault
location and with the subsequent re-alignment procedures.
