Anritsu MG3641A - Manual (Page 61)

SECTION 4 OPERATING INSTRUCTIONS
4.6.4 Setting Range of FM Frequency Deviation
In setting an FM frequency deviation, you can set it up to maximum 2048 kHz, irrespective of the output frequency.
However, the actual FM frequency deviation is restricted by the output frequency, as shown in the table below. If
you make a setting in excess of this limit, the "Uncal" lamp will come on, indicating that the range was surpassed,
and, at the same time, the deviation will be set to the maximum value of the FM frequency deviation range
corresponding to the current output frequency.
Output Frequency FM Frequency Deviation Range
≥125 kHz, <250 kHz
0 to 125 Hz
≥250 kHz, <500 kHz
0 to 250 Hz
≥500 kHz, <1 MHz
0 to 500 Hz
≥1 MHz, <2 MHz
0 to 1 kHz
≥2 MHz, <4 MHz
0 to 2 kHz
≥4 MHz, <8 MHz
0 to 4 kHz
≥8 MHz, <16 MHz
0 to 10 kHz
≥16 MHz, <32 MHz
0 to 25.6 kHz
≥32 MHz, <64 MHz
0 to 51.2 kHz
≥64 MHz, <128 MHz
0 to 102 kHz
≥128 MHz, <256 MHz
0 to 256 kHz
≥256 MHz, <512 MHz
0 to 512 kHz
≥512 MHz, ≤1040 MHz
0 to 1024 kHz
>1040 MHz, ≤2080 MHz
0 to 2048 kHz
4.6.5 Polarity of Modulation Signal
You can switch the polarity of modulation signals independently for each type of modulation.
Modulation signals are usually of non-inverted polarity. Yet, they invert the polarity as you set an AM modulation
factor or FM frequency deviation in a negative value through the number keys.
For example, if you set the AM modulation factor to
−30 %, you obtain an AM of 30 % modulation factor with
modulation signals in inverted polarity.
The inversion and non-inversion cannot be switched by the step keys or rotary knob.