Filter
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Table 2-2. Adjustable Components
Reference
Designator
A2R152
A2R206
A2R209
A2R215
A2R218
A2R262
A2R263
A2R268
A2R271
A4C707
A4R445
A4R531
A4R544
A4R826
A5L300
A5L301
A5L700
A5L702
A5R343
A5T200
A5T202
Adjustment
Name
16 MHz PLL ADJ
DGTL X GAIN
SWEEP OFFSET
DGTL Y GAIN
VIDEO OFFSET
STOP BLANK
START BLANK
VIDEO GAIN
SWEEP GAIN
FM DEMOD
LIMITER PHASE
LOG AMP TOS
LIN FIDELITY BOW
CAL OSC AMPTD
LC CTR 1
LC CTR 2
LC CTR 3
LC CTR 4
15 DB ATT
XTAL CTR 1
XTAL CTR 2
Adjustment
Number
17
2
2
2
2
2
2
2
2
13
5
5
5
4
3
3
3
3
4
3
3
Description
Adjusts the free-running frequency of the
16 MHz CPU clock.
Adjusts the horizontal gain in the X line generator.
Adjusts the beginning of the trace to the leftmost
vertical graticule line in fast-analog zero-span mode.
Adjusts the vertical gain in the Y line generator.
Adjusts the vertical position in fast-analog zero
span to match the digital zero-span input.
Adjusts the blanking at the end of a vector on
the display.
Adjusts the blanking at the start of a vector on
the display.
Adjusts the vertical gain in fast-analog zero span
to match with the digital zero-span input.
Adjusts the end of the trace to the rightmost
vertical-graticule line in fast-analog
zero-span mode.
Adjusts the FM demodulation for a peak response.
Adjusts Limiter Phase for peak response.
Minimizes error to Top of Screen.
Minimizes Linearity Fidelity error.
Sets calibration oscillator output power
(nominally -35
dBm).
This power is injected into
the IF during the AUTO IF ADJUST routines.
Adjusts center frequency of first stage of LC
bandwidth filter to 10.7 MHz.
Adjusts center frequency of second stage of LC
bandwidth filter to 10.7 MHz.
Adjusts center frequency of third stage of LC
bandwidth filter to 10.7 MHZ.
Adjusts center frequency of fourth stage of LC
bandwidth filter to 10.7 MHz.
Adjusts the attenuation of the reference 15 dB
attenuator for 15 dB between minimum and
maximum attenuation.
Adjusts center frequency of first stage of crystal
bandwidth filter to 10.7 MHZ.
Adjusts center frequency of second stage of crystal
bandwidth filter to 10.7 MHZ.
2-6 Adjustment Procedures