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Output Level Flatness
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TB-9-6625-2182-35 Signal Generator SG-1207/U (Hewlett-Packard Model 8642M) Manual
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Spectral Purity

TB 9-6625-2182-35
Table 7. Output Level Flatness
Start frequency
Stop frequency
Calculated flatness
Maximum limit
(Hz)
(Hz)
(dB)
±(dB)
100  k
450  M
1.5
550  M
950  M
2
1200  M
2000  M
2.5
(6) Press RF OFF/ON pushbutton to OFF.
b. Adjustments. No adjustments can be made.
12. Attenuation
a. Performance Check
(1) Press TI pushbuttons as listed in (a) through (c) below:
(a) INSTR PRESET.
(b) ENTRY ­ AMPD.
(c) DATA - 0dBm.
(2) Set measuring receiver with sensor module to measure tuned RF level in
logarithmic mode, then select 0.01 dB mode using special function 32.0.
(3) Press measuring receiver CALIBRATE, and SET REF keys.
(4) Press TI ENTRY ­ AMPTD pushbutton and enter DATA amplitude for each
row in table 8. Using measuring receiver and tuned RF level power measurement
techniques measuring receiver will indicate within limits specified.
NOTE
RECAL (CALIBRATE) as necessary.
Table 8. Attenuator at 100 MHz
Measuring receiver indications
Test instrument
DATA
(dBm)
amplitude
(dBm)
Min
Max
-10
-8
-12
-20
-18
-22
-30
-28
-32
-40
-38
-42
-50
-48
-52
-60
-58
-62
-70
-68
-72
-80
-78
-82
-90
-88
-92
-100
-98
-102
-110
-108
-112
(5) Press RF OFF/ON pushbutton to OFF.
(6) Disconnect measuring receiver from TI OUTPUT RF.
b. Adjustments. No adjustments can be made.

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