What are you looking for?
Transmit Center Frequency Tolerance
Definition
The transmit center frequency tolerance is a measurement of the center frequency offset from the desired carrier frequency.
Standards
- IEEE Std. 802.11a-1999 16 September 1999 Paragraph 17.3.9.4
- IEEE Std. 802.11b-1999 16 September 1999 Paragraph 18.4.7.4
Measurement Subtleties
Transmit center frequency tolerance is important because circuit transients can produce time-varying frequency changes in the local oscillator. The performance of the equalizer in the receiver depends on the preamble sequence used for training, which can be adversely affected by the transient frequency instabilities in the transmitter.
You can see the transmitter center frequency error numerically by using the 89601A or 89607A software.
Test Tools
You can make the transmit center frequency tolerance measurement using the Keysight 89601A vector signal analysis software in conjunction with a Keysight signal analyzer. You can use the software in various combinations with the Keysight 89600 vector signal analyzers, PSA and ESA-E spectrum analyzers, and several different Infiniium oscilloscopes.
You can also use the Keysight 89607A WLAN test suite software, with the instruments listed above, to perform the transmit center frequency tolerance measurement.