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

DC FM Frequency
Error Performance
Tkst
Connect the Test
Equipment
HP 8848 UNDER TEST
Configure the For frequencies > 10 MHz and
Frequency Counter Use Input 2; press m.
w For frequencies > 500 MHz:
DC FM Frequency Error Performance Test
HP 53508
FREQUENCY COUNTER
ATTEGTOR
10 do
Figure 8-15. DC FM Frequency Error Equipment Setup
Use Input 1; press m).
< 500 MHz:
Configure the HP 8648 1. Set the amplitude; press @KKK] @ krs(m)l.
2. Select external DC FM; press (FM [EXTDC).
3. Press (j-ON/OFF) to turn the RF output on.
4. Turn on [MOD ON/OFF).
5. Press (EXTDC) to perform DC FM Calibration.
Measure Deviations 1. Set the frequencies and deviations shown in the test record.
2. For each data point, measure the carrier frequency with FM turned
off, press (~00 ON/OFF).
3. For each data point, measure the carrier frequency with FM turned
on, press (MOD ON/OFF).
4. Compute the error (difference) and compare it to the corresponding
limits.
Test Record HP 8648A .................................................. ‘Ihble 8-15
HP 8648B .................................................. .‘lhble 8-36
HP 8648C ................................................... Table 8-61
HP 8648D .................................................. .‘Ihble 8-86
Performance Tests 8-21