Chapter 2a 195
Making Adjustments: If 3335A Source Not Available
15a. Frequency Response of the 8590L, 8591C, and 8591E
16.On the synthesized signal generator, press CW and STEP UP.
Entering Flatness Correction Data
17.Enter the pass code by pressing the following analyzer keys.
PRESET
FREQUENCY, −2001, Hz
75 Ω input: AMPLITUDE, More 1 of 2, AMPTD UNITS, dBm
18.To access the flatness correction menu, press the following analyzer
keys.
CAL, More 1 of 4, More 2 of 4
SERVICE CAL
FLATNESS DATA
Perform the next step only if all the flatness correction data must be
replaced in memory due to the repair or replacement of the A16
processor/video assembly.
19.To initialize the area of memory where the flatness correction data is
stored, press the following keys.
INIT FLT
PRESET
FREQUENCY, −2001, Hz
75 Ω input: AMPLITUDE, More 1 of 2, AMPTD UNITS, dBm
CAL, More 1 of 4, More 2 of 4
SERVICE CAL
FLATNESS DATA
20.To enter flatness corrections, press EDIT FLATNESS.
21.The frequency of the first data point, 4.00 MHz, will be displayed in
the active function block of the analyzer display.
22.Use the data keys on the analyzer to enter the amplitude value for
4 MHz from Column 2 of Table 2a-5 (75 Ω input: Column 5),
Frequency Response Errors. Terminate the entry with the
dB key.
When entering negative amplitude values, precede the numeric
entry with the
− and dB keys or the −dB key.
The
BK SP (backspace) key may be used to correct any entry if the
terminator,
dB or −dB key has not been pressed. Re-enter the data if
the terminator has been pressed.
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