Service manual

24 Agilent 8494/95/96A/B Attenuators Operating and Service Manual
3Operating Guides
Procedure
1 Connect equipment as shown in Figure 2 on page 23 with the
attenuator set to 0 dB attenuation.
2 Set the test oscillator to 0.3 Vrms at 1 kHz.
3 Set SWR meter range to 2 dB (expanded) [or for the 8494A/B to
10 dB (expanded)] and adjust its bandwidth to the center of the
adjustment range. Fine- tune the oscillator frequency to obtain
maximum meter indication.
4 Set attenuator and SWR meter range switch as listed in Table 9
and verify that the SWR meter indicates within the limits
shown.
Table 9 Attenuator and SWR Settings
SWR Meter Range
(dB)
Attenuation (dB) Meter Indication (dB)
Minimum Actual Maximum
8494A/B 8495A/B
8496A/B
8494A/B 8495A/B 8496A/B 8494A/B 8495A/B
8496A/B
8494A/B 8495A/B
8496A/B
8494A/B 8495A/B
8496A/B
10 2 0 0 0 – – Set to 0.0 Set to 0.5 – –
10 6 1 10 10 0.40 1.40 – – 0.60 1.60
10 12 2 20 20 0.90 0.30 – – 1.10 0.70
10 16 3 30 30 1.35 1.25 – – 1.65 1.75
10
[1]
22 4 40 40 1.85 0.15 – – 2.15 0.85
12 26 5 50 50 0.35 1.10 – – 0.65 1.90
12 32 6 60 60 0.85 0.00 – – 1.15 1.00
12 36
[1]
7 70 70 1.30 0.90 – – 1.70 2.10
12
[1]
42
[1]
8 – 80 1.80 –0.15 – – 2.20 1.15
14 46
[1]
9 – 90 0.30 0.75 – – 0.70 2.25
14 52
[1]
10 – 100 0.80 –0.30 – – 1.20 1.30
14 56
[1]
11 – 110 1.75 0.60 – – 1.75 2.40
[1] Adjust range by 2 dB, if needed, to obtain an on-scale indication.