Giga-tronics 8650A Series, Руководство по эксплуатации

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Front Panel Operation
Manual 31470, Rev. E, April 2001 2-25
2.3.4 Measuring Source Output Power
To measure the source output power:
1. Connect the power sensor to the RF output of the microwave source.
2. Verify that the microwave source RF output is ON.
3. Press
[FREQ]
; enter the operating frequency (use the cursor keys to adjust the value), and press
[
OK
OK OK
OK
].
4. The 8650A will now display the microwave source output power. Adjust the source amplitude to
the desired level.
The 8650A responds rapidly to amplitude changes. Ranging is automatically performed in real time
through a 90 dB dynamic range using CW or modulated sensors. The peak sensor dynamic range is 40
dB Peak and 50 dB CW. Entering the operating frequency enables the 8650A to automatically apply
frequency calibration factors appropriate to the sensor being used. The operating frequency can be
communicated to the 8650A using the front panel menus, the GPIB, or the V
PROP
F voltage input.
2.3.5 Using the Peaking Meter
The line bar graph provides a linear display of power level on a decade range basis. For example, a power
level of 3 dBm produces an approximate 50% response on the peaking meter. The peaking meter
displays on the configured line as a solid horizontal bar between two brackets. The bracket on the left of
the screen represents the lower limit of the peaking meter, and the bracket on the right of the screen
represents the upper limit (see Figure 2-15). The procedure to turn the peaking meter on and off, and to
set it’s limits is detailed in Section 2.2.2.
Figure 2-15: The Peaking Meter
CAL ON
A - 70.999
B - 54.245
- 16.754
CW
dB
CW
dBm
CW
dBm
dB
Configure Display
Line 1
Line 2
Line 3
Line 4
More
Options
Cancel
-24.246
A/B
-B
A
[
]
Lower Limit
Bracket
Upper Limit
Bracket
Peaking Meter
(Bar Graph)