2 Operating Your Frequency Counter
108 Keysight 53150A/151A/152A Operating Guide
RS-232 Serial Port Data Rate (BAUD)
The Baud rate for the RS-232 serial port is configurable at 2400, 4800, 9600,
14,400, and 19,200 bps. The default setting is 9600 bps.
Frequency Modulation (FM)
The Counter can measure signals that are modulated in frequency, such as a
microwave radio carrier. When FM is set to AUTO (the default setting), the Counter
automatically detects FM signals and modifies its measurement algorithm
accordingly. Since this increases the time it takes to compute each measurement,
you can turn this feature OFF to increase measurement speed, or leave it set to
AUTO to increase accuracy when measuring FM signals.
Channel 1 Low-Pass Filter (CH1 LPF)
The Counter has a built-in 50 KHz low-pass filter that can be enabled from the
Menu to eliminate measurement distortions that result from noise in
low-frequency signals. When the low-pass filter is enabled, signals above 50 KHz
cannot be measured on Channel 1.
Power Offset
(POWER Offset On/Off key)
Off, On
(-99.99 through +99.99 dBm)
Off
(0)
Relative Power
(Rel Pwr key)
Off, On Off
Table 2-1 Factory Default Function Settings (continued)
Function Available Settings Default Setting
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