HP 8591C, User Manual, Page: 100 / 373

I
Channel Measurements
Making Channel Measurements
System frequency
response test
1. To perform a cable TV overall system frequency response, press the
following analyzer keys:
Main
of 3 Main 2 of 3
SYSTEM FRQ RESP
Press ENTER STRT FRQ , enter the start frequency of your system, then
press
Press ENTER STOP FRQ , enter the stop frequency of your system, then
press
N O T E
The start and stop frequencies for the measurement should be the same as the reference trace for
meaningful results.
4. If you want to use a reference trace that was previously stored in the
analyzer’s internal memory and you know the trace register number of
the reference trace, press RECALL FRM INT . See Chapter 5 for more
information about using RECALL FRM INT
If you want to create a reference trace, press CONTINUE ,
TAKE REF TRACE See Chapter 5 for more information about using
TAKE REF TRACE.
After the reference trace appears on screen, select FAST SWEEP or
SLOW SWEEP , then, if you want to save the reference trace, press
SAVE TRB TO INT , enter a register number, then press
Press DO FRQ RESP TST to perform the measurement. See
Figure 2-39. Also, see Chapter 5 for more information about using
DO FRQ RESP TST
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