Tektronix 1705A Miscellaneous Uses forthe 1705A

Introduction
1705A Spectrum Monitor 1-17
1705A
SPECTRUMMONITOR
IN
RF
OUT
HPA
OUT
IN
UPCONVERTER
OUT
VIDEO
EXCITER
70MHZ
INPUT
DIRECTIONAL
COUPLER
Figure1 -9: Up linkVideo Exciter, Up converter, and High Power Amplifier (HPA)
showinghow to hook up a 1705A Spectrum Monitort o lookat the VideoExciter
output
In addition to the othermeasurements that can be made a quick check of HPA,
antenna, and transponder(as a system) can be made by comparing the exciter
output (using the 70 MHz input)to the incoming signal from the down link
(using the L--Band Input) by simply switching between inputs. See Figure 1-10.
Miscellaneous Uses forthe 1705A
The 1705A Spectrum Monitor 70 MHz band covers a frequencyrange from 45
to 100 MHz, at center screen. The lo w VHF television channels and major
portion of the FM broadcast band arewithin the frequency rangeof the 1705A.
If a spectrummonitoring application within this band of frequencies exists the
1705A can easilybe used.