Input Attenuator Accuracy - TB-9-6625-2351-350012

TB-9-6625-2351-35 Spectrum Analyzer Hewlett-Packard Model 8562A Manual
Page Navigation
12

TB 9-6625-2351-35

NOTE

At 2 MHz setting, several minor peaks might be observed.

Select peak with highest amplitude.

(22) Press synthesizer/level generator AMPLITUDE key then INCR ⇓ key.

(23) Press TI MARKER ON key then [MARKER DELTA] key.

(24) Press synthesizer/level generator INCR ⇑ key.

(25) Press synthesizer/level generator FREQUENCY key and increase frequency for

a TI ∆ MKR indication between -0.02 and +0.02 dB. Record synthesizer/level generator

frequency indication as upper 60 dB frequency.

(26) Decrease synthesizer/level generator frequency past TI signal amplitude peak

amplitude until ∆ MKR indicates between -0.02 and +0.02 dB. Record synthesizer/level

generator frequency as lower 60 dB frequency.

(27) Subtract lower 60 dB frequency recorded in (26) above from upper 60 dB

frequency recorded in (25) above. Record the result as actual 60 dB bandwidth in table 3.

(28) Divide the 60 dB bandwidth recorded in (27) above by the 3 dB bandwidth

recorded in table 3 above. The result must be a shape factor of 15 or less.

(29) Set synthesizer/level generator frequency to 40 MHz.

(30) Press TI MARKER OFF key.

(31) Repeat technique of (18) (b) and (20) through (30) above for remaining CONTROL BW

[RES BW] settings listed in table 3.

b. Adjustments. No adjustments can be made.

11. Input Attenuator Accuracy

a. Performance Check

(1) Connect equipment as shown in figure 2.

Figure 2. Input attenuator accuracy (50 MHz) - equipment setup.

(2) Press synthesizer/level generator keys to values as listed in (a) through (c) below:

(a) FREQUENCY to 50 MHz.

(b) AMPLITUDE to -50 dBm.