4-4.
SWEPT FREQUENCY ACCURACY (Cont’d)
7. Refer to Table 4-8,
press the HP 8340B/41B
[STARTFREQ] key and enter the start frequency shown in
Table 4-8. Press the [STOPFREQ] key and enter the appropriate stop frequency. Press the [SWEEPTIME]
key and enter the appropriate sweep time. Select the appropriate spectrum analyzer resolution bandwidth.
Set the spectrum analyzer center frequency to the appropriate frequency for the percentage of band being
tested. Press
the
HP 8340B/41B
[CONT]key to return to the swept mode. Stop Frequencies greater than
20.0
GHz only apply to the HP 8340B.
8.
Ideally, the oscilloscope response will be at the center graticule line, if not, adjust the spectrum analyzer
center frequency to bring the oscilloscope response to the center graticule line. The difference between the
original center frequency setting and present center frequency is the HP 8340B/41B swept frequency error.
This error should be within the test limit shown in Table 4-8.
9. Repeat steps 3 through 8 to test at 50% and 80% of band.
NOTE
If the swept frequency accuracy error exceeds the test limit, refer to the Sweep
Gain and Delay Adjustments, in Section V, Adjustments in the Service Manual.
Table 4-8.
Swept Frequency Accuracy Test Frequencies
DUT
Spectrum Analyzer
Test
Limit (kHz)
Start
Freq (0Hz)
Stop
Freq (0Hz)
Sweep
Time (ins)
center Frequency (0HZ)
Res
BW (kHz)
20% of Band
50% of Band
80% of Band
2.3
2.300099
3000
2.3000198
2.3000495
2.300792
0.3
±0.99
2.3
2.300101
3000
2.3000202
2.3000505
2.3000808
0.3
~l.01
2.3
2.300499
1000
2.3000998
2.3002495
2.3003992
1.0
p4.99
2.3
2.300501
1000
2.3001002
2.3002505
2.3004008
1.0
~5.01
2.3
2.30499
300
2.300998
2.302495
2.303992
3.0
±49.9
2.3
2.30501
300
2.301 002
2.302505
2.304008
3.0
±100.02
2.3
2.31
300
2.302
2.305
2.308
3.0
±200
2.3
2.32
100
2.304
2.310
2.316
10
±400
2.3
2.33
100
2.306
2.315
2.324
10
±600
2.3
2.34
100
2.308
2.320
2.332
30
±800
2.3
2.349
100
2.3098
2.3245
2.3392
30
±998
2.3
2.3501
100
2.31002
2.32505
2.34008
30
±1020
2.3
2.36
100
2.312
2.33
2.348
30
±1200
2.3
2.37
100
2.314
2.335
2.356
30
±1400
2.3
2.38
100
2.316
2.34
2.364
30
±1600
2.3
2.39
100
2.318
2.345
2.372
30
±1800
2.3
2.3999
100
2.31998
2.34995
2.37992
30
±1980
2.3
2.4001
100
2.32002
2.35005
2.38008
100
±2002
2.3
2.799
100
2.3998
2.5495
2.6992
1000
±4990
2.3
2.801
100
2.4002
2.5505
2.7008
1000
±5010
2.3
7.29
100
3.298
4.795
6.292
3000
±49900
2.3
7.31
100
3.302
4.805
6.308
3000
±50000
2.3
8.3
100
3.500
5.300
7.100
3000
±50000
2.3
16.452
100
5.1304
9.376
13.6216
3000
±50000
2.3
20.0
100
5.84
11.15
16.46
3000
±50000
2.3
24.551
100
6.75
13.425
20.1
3000
±50000
2.3
26.51
100
7.14
14.4
21.66
3000
±50000
1. Applies to 8340B only.
4-24
Performance Tests
HP 8340B/41B
