Step 2. Connect The Signal To The Analyzer - HP 8591C User Manual

System Measurements
Making System Measurements

Step 2. Connect the signal to the analyzer

To prevent the analyzer input from being damaged, the total power at the
C A U T I O N
analyzer input must be less than +72 dBmV.
To prevent the analyzer input mixer from being overloaded, the total
power at the analyzer input mixer must be less than +37 dBmV, except
for CSO/CTB for which +27 dBmv is the maximum total power input
to the mixer.
total power must be calculated by summing the individual carriers. The
TOTL PWR (8 INPUT softkey function accounts for system tilt.
You can measure the input power by pressing Setup , Analyzer Input ,
TOTL PWR (8 INPUT The total power is displayed at the bottom of the
screen.
Total power at the input mixer can be reduced by increasing input
attenuation. Press (-1 ATTEN , and make the adjustment. The
analyzer retains a manually selected attenuation until you either select a new
value or reset the analyzer power-on default conditions.
For all tests provided by the HP 85721A personality, the analyzer
automatically selects the attenuator setting to meet the above requirements.
1. Use the necessary adapters to connect the cable TV signal to the analyzer
2. If your analyzer has Option 107 installed, you must use the coupler
3. If your analyzer has Option 107 installed, ensure that the rear-panel
3-8
For systems with unequal carrier levels (system tilt), the
See Figure 3-3.
(provided) and connect the cable TV signal to the TV IN and analyzer
input connectors as shown in Figure 3-4. Figure 3-4 shows the
connections for RF and video measurements.
TV TRIG OUT is connected to GATE IN as shown in Chapter 1.
I -