Spectrum Analyzer Measurement Accuracy Verification - Anritsu Spectrum Master MS2711D Maintenance Manual

8. Spectrum Analyzer Measurement Accuracy Verification

The tests in this section verify the level accuracy of the Spectrum Master. There are two parts to this
test:
· Level Accuracy with Frequency Test
· Level Accuracy with Power Test
Level Accuracy with Frequency Test
a. Equipment Required:
· Anritsu MG3692A Synthesized Signal Source, with options 2A, 4 and 15A
· Anritsu ML2438A Dual Channel Power Meter or equivalent
· Anritsu MA2442A High Accuracy Power Sensors or equivalent (2)
· Anritsu N241A50 Power Splitter or equivalent
· Anritsu 34NN50A 50 ohm adapter or equivalent
· Anritsu 34RSN50 50 ohm adapter or equivalent
· Anritsu 34RKNF50 50 ohm adapter or equivalent
· Anritsu 15NNF50-1.5C RF Coaxial Cable or equivalent
· Weinschel 1-10 10 dB Fixed Attenuator
b. Procedure
1. Turn on the power meter and signal source.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
2. On the power meter, press the
display Channel 2 setup menu. Press the
Press the
Sensor
3. Connect the power sensors to the power meter and calibrate the sensors.
4. Set the MG3692A output power level to 5 dBm.
5. Set the MG3692A output to 30 MHz CW.
6. On the power meter, press the
the keypad to enter 30 MHz as the input signal frequency, which sets the power meter to the
proper power sensor cal factor. Press the
reading.
7. Connect Sensor A to the MG3692A output, measure the output power level and record the value
in column A of Table 2.
8. Disconnect Sensor A from the MG3692A output.
9. Connect the power splitter to the MG3692A output and Sensor B to one of the power splitter out-
puts. Install the 10 dB Fixed Attenuator to the other power splitter output and then connect Sen-
sor A to the end of the Attenuator. Refer to Figure 1.
10. Record the new sensor A reading in column B of Table 2.
11. Record the Sensor B reading in column D of Table 2.
12. Calculate the Splitter/Attenuator Combined Loss using the following formula and record the re-
sult in column C of Table 2: C = A – B
13. Calculate the Sensor B path Power Splitter Loss using the following formula and record the re-
sult in column E of Table 2: E = A – D
Spectrum Master MM
key, the
Channel
INPUT
key to display both Sensor A and Sensor B readings.
key, the
Sensor
SENSOR
soft key and then the
Setup
key twice to set the Input Configuration to B.
soft key, and then the
Cal Factor
key on the power meter to display the power
soft key to
CHANNEL
soft key. Use
FREQ
9