Agilent Technologies HP 8566B Spécifications Page 235

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10. Step Gain and 18.4 MHz Local Oscillator Adjustments
Equipment
Digital Voltmeter (DVM)
....................................
HP 3456A
Power Meter
...............................................
..HP436
A
Power Sensor
...............................................
HP 8481A
10
dB
Step Attenuator .........................
HP 3&D, Option H89
1
dB
Step Attenuator ..........................
HP
355C,
Option H25
Procedure
Note
Adjustment
A4A5R33
CAL sets the gain of the
A4A5
Step Gain
Assembly with no gain steps enabled. Perform Adjustment Procedure
5, “Log Amplifier Adjustments,” (steps 1-12) Adjustment Procedure 6,
“Video Processor Adjustments,
Adjustment Procedure 8, “2 1.4 MHz
Bandwidth Filter Adjustments,” and Adjustment Procedure 23, “Track
and Hold Adjustments” to ensure that the signal level at the top CRT
graticule line is properly set before adjusting
A4A5R33
CAL.
1.
2.
3.
4.
5.
+
10
V
Temperature
6.
Compensation
Supply
7.
Adjustment
8.
IF
Gain
Adjustment
9.
10.
11.
12.
13.
Position the spectrum analyzer upright as shown in Figure
Figure 3-46 and remove the IF-Display Section top cover.
Set the spectrum analyzer LINE switch to ON and press
1-1.
Connect the spectrum analyzer CAL OUTPUT to the RF INPUT.
On the spectrum analyzer, key in
(j-1
8 and adjust the front
panel AMPTD CAL control for a displayed signal level of -10.00
dBm.
On the spectrum analyzer, key in
(jj]
9 and adjust the
front panel FREQ ZERO control for maximum amplitude of the
displayed signal trace.
Connect DVM to A4A5TPl (+
1OVF).
If DVM indication is between
+9
V dc and 10.0 V dc, no
adjustment is required.
If DVM indication is not within tolerance of step 5, adjust
A4A5R2
+
1OV
ADJ for DVM indication of +9.5 fO.l V dc at normal
room temperature of approximately
25’C.
Voltage change is
approximately 30
mV/OC.
Therefore, if room temperature is higher
or lower than
25”C,
adjustment should be made higher or lower,
accordingly.
Key in (CENTER FREQUENCY] 100 MHz,
@EEKQ
0
dB,
CFREQUENCY
SPAN) 0 Hz,
100 Hz, and [SWEEP TIME) 20 ms.
CREFERENCE
LEVEL] -10
dBm,
[RES-
1
kHz,
[V’DEOBW]
Disconnect cable 97 (white/violet) from
A4A8Jl
and connect cable
to the calibrated power meter/power sensor. Refer to Figure 3-47
for location of cable 97 and A4A8Jl.
Adjust front-panel AMPTD CAL adjustment for a power meter
indication of -5
dBm.
Disconnect power meter and reconnect cable 97 to A4A8Jl.
Press LIN pushbutton and MARKER
fjj).
Adjustments 3-95
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