VNA Master MS202xA MM
7
7.
Press the Freq/Dist key, and select the
Start Freq
soft key. Using the keypad, enter
1
, then press the
GHz
soft
key.
8.
Press the
Stop Freq
soft key. Using the keypad, enter
1
, then press the
GHz
soft key.
9.
Press the
Measurement
key and select the
Power Monitor
soft key.
10. On the MG3691A press the
Level
key, then use the knob to adjust the power level so that the power meter reads
-40 dBm.
11. Verify that the VNA Master reading is 40 ± 1.0 dBm.
12. Repeat steps 10 and 11 for the other power level settings shown in Table 3.
4.5
Bias Tee (Option 10) Verification
If the Bias Tee (Option 10) is installed in the VNA Master, the following test can be used to verify the performance of the
bias termination.
Equipment Required:
•
105 Ohm, 1 Watt, Low Current Load, Anritsu T3377
•
40 Ohm, 5 Watt, High Current Load, Anritsu T2904
•
VNA Master External Power Supply, Anritsu Part Number 40-168
Procedure:
1.
Connect the external power supply (Anritsu part number 40-168) to the VNA Master.
2.
Press the
On/Off
key to turn on the VNA Master.
3.
Press the
Shift
key, the
Preset
key (1), and then the
Preset
soft key to reset the instrument to the default start-
ing conditions.
4.
Press the
Shift
key, and then the
Sweep
(3) key.
Low Current Test
1.
Press the
Bias Tee
soft key and verify that the
12V
soft key is selected and the
Current
soft key is set to
Low
.
2.
Press the
Bias Tee On/Off
soft key to turn the Bias Tee
On
.
3.
Connect the 105 Ohm load to the
RF In
test port.
4.
Verify the voltage and current readings displayed on the left side of the screen are within the specifications
shown in Table 4.
5.
Select each of the voltage setting soft keys and verify the voltage and current readings displayed on the left side
of the screen are within the specifications shown in Table 4.
Table 3
Power Monitor Verification
Power Level (dB)
Spec (dB)
-40
± 1.0
-21
-4
0
+13
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
Table 4
Bias Tee Verification, 105 Ohm Load, Low Current
Voltage Setting (V)
12
15
18
21
25
Voltage Specification (V)
± 0.5
± 0.6
± 0.7
± 0.8
± 1.0
Current Specification (mA)
85-145
113-173
142-202
172-230
199-259
