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HP 8648 A/B/C/D - Changpuak.ch

HP 8648 A/B/C/D - Changpuak.ch

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Residual FM<br />

Performance Test<br />

Connect the Test<br />

Equipment<br />

MEASURING RECEIVER<br />

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<strong>HP</strong> 6648 UNDER TEST<br />

MODULATION<br />

OUTPUT<br />

Residual FM Performance Test<br />

RF MIXER<br />

Figure 8-12. Residual FM Equipment Setup<br />

\<br />

IF<br />

OUTPR:<br />

Note Use RF mixer MDC-174 when testing the <strong>HP</strong> <strong>8648</strong>ABC. When testing<br />

the <strong>HP</strong> <strong>8648</strong>D, both RF mixer MDC-174 and MDC-164 are required.<br />

Configure the 1. Reset<br />

Measuring Receiver 2. FM mode<br />

3. Peak+ detector<br />

4. 50 Hz high-pass filter<br />

5. 15 kHz low-pass filter<br />

Configure the Audio 1. AC level mode<br />

Analyzer 2. CCITT weighting filter<br />

3. 30 kHz low-pass filter<br />

4. Set low input to ground<br />

/<br />

sn68a<br />

Performance Tests 8-17

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