Section 8 Performance Test
8-4
8.3 RF Output Level Accuracy
(1) Test criteria
ALC On, output: –3 dBm, level difference from results during CW and
during modulation at noise bandwidth of 7.68 MHz: ±3 dB (excluding
when noise internal adder function is On.)
(2) Measuring instruments for test
•
Power meter .........ML4803A
•
Power sensor ........MA4601A
(3) Setup
Anritsu
M ｷ3681A
ML4803A
Power Meter
MG3681A+
MU368060A
Sensor Input
RF Output
Anrits u POWER METER ML4803A
ML4803A
Power Sensor
(4) Test procedures
[1] Set the communication system for the MU368060A to "NOISE1".
[2] Press the [Preset] button and then set the following parameters:
Baseband : On
Noise : 7.68 MHz
[3] Set the RF Output on the MU368060A to Off.
[4] Perform zero point adjustment and sensor sensitivity calibration
of the power meter.
[5] Set the output level of the MU368060A to –3 dBm.
[6] Set the frequency to be measured on the MU368060A.
[7] Set the sensor calibration factor for the power meter.
[8] Set the RF Output on the MU368060A to On and then measure
the output level.
[9] Set the following prameters.
Digital Modulation : On
[10] Repeat procedures from [3] to [8].
[11] Find the level difference from the results [7] during CW and [9]
during modulation.
