Attenuator accuracy.

mental input signal to the spectrum analyzer that

lished in (3) above.

b. Adjustments. No adjustments can be made.

varies from 5 to 15 MHz.

10. Attenuator accuracy. a. Performance Check

(5) Observe the spectrum analyzer display for har-

monic signals between 10 and 45 MH. All harmonic

(1) Connect equipment as shown in figure 3.

signals will be at least 35 dB below the reference estab-

Figure 3 Attenuator accuracy (100 kHz) - equipment setup

(2) Set TI ATTENUATION (dB) pushbutton

voltmeter will indicate between 0.341 and 0.944 V ac.

switches at 0 dB (all pushbuttons out).

(5) Release the TI 1 dB pushbutton switch to out

(3) Adjust frequency of test oscillator (A6) to 100

and press the pushbuttons listed in table 4. The digital

kHz and output amplitude for a 1.600 V (volt) ac in-

voltmeter indications will be within the limits specified

dication on digital voltmeter (A2).

for each pushbutton setting.

(4) Press TI 1 dB pushbutton switch. Digital