Hardkey and Softkey Reference ESG Family Signal Generators
Phase Modulation
4-68 User’s Guide
Φ
M Dev
Use this softkey to set the phase modulation deviation for the ΦMPath1
and
ΦMPath2 configurations. To change the value of the
Φ
M deviation,
press the softkey once. The current value for
Φ
M deviation is displayed
in the active entry area. To enter a new value, rotate the front panel
knob until the desired value is displayed, use the up and down arrow
keys, or enter the value using the numeric keypad and press the
pi rad,
rad, or deg terminator softkey. The range of values allowed depends on
the carrier frequency and the rate selected. Refer to Table 4-2.
Table 4-2 Maximum Deviation Values for Phase Modulation
Table 4-3 Carrier Frequency Bands versus Value of N
For example, if you set up ΦMPath1 for normal phase modulation with a
carrier frequency of 400 MHz, and a rate of 100 kHz, the maximum
peak deviation that you can set is 0.5 (value of N) times 90 radians
resulting in a maximum peak deviation of 45 radians.
Notice that the new value of ΦM deviation applies only to whichever
ΦM path configuration you have currently selected. Also,
ΦMPath2 is
limited to a maximum rate of 1 MHz. Also, whenever
ΦMPath1 is used
with
ΦMPath2, the deviation for ΦMPath1 must be greater than or equal
to the deviation for
ΦMPath2.
Default Value: 0 radians
Softkey Location:
FM/ΦM hardkey > FM ΦM softkey > ΦMPath12
Mode
Maximum
Deviation
Maximum Rates (3 dB BW)
Φ
MPath1
Φ
MPath2
Normal
N
1
x 90 radians
1. For the value of N, refer to Table 4-3.
100 kHz 100 kHz
High
Bandwidth
N x 2
π
radians 1.5 MHz (typical) 1 MHz (typical)
N x
π
/2 radians 6 MHz (typical) 1 MHz (typical)
Carrier Frequency N
250 kHz to
≤
249.999 MHz 1
> 249.999 MHz to
≤
500 MHz 0.5
> 500 MHz to
≤
1 GHz 1
> 1 GHz to
≤
2 GHz 2
> 2 GHz to 4 GHz 4
To Next Page
Loading...
Need help?
General
