User's Manual

inactive state until the NIC is in receive mode shall be not more than 10µs.
3.1.6. RF center frequency
The RF function provides programming of the RF center frequency from 2400MHz to
2500MHz in steps of 1MHz. The RF center frequency for transmission and reception shall be stable within 25kHz of its final value,
0.75ms after reprogramming or switching from doze mode to receive mode.
3.1.7. RF center frequency and clock accuracy
The master clock frequency and the RF center frequency shall be within +/-25ppm of the nominal value.
The carrier jitter is within 25kHz of its final value 40µs after switching between RX and TX mode.
3.2. Transmitter
3.2.1. Transmit power-on and power-down ramp
The transmit power-on ramp from 10% to 90% of the maximum power shall not take longer than 2µs. The transmit power-down ramp
from 90% to 10% of the maximum power shall not take longer than 2µs. The transmit power ramp shall be constructed such that the
emissions comply with the radio regulations.
3.2.2. Transmitted power level
The nominal transmitted power shall be 15 dBm +/- 2dB at full operational temperature range. This range complies with the
IEEE802.11 PHY standard and the radio regulations. The power density shall not exceed 10dBm/MHz EIRP.
3.2.3. Transmitted output spectrum
The transmitted spectral products shall be less than -30dBr (dB relative to the sin(x)/x peak) for frequencies between 11MHz
and 22MHz from the center frequency and -50dBr for frequencies more than 22MHz from the center frequency. The
measurement shall be made at the antenna port using 100kHz resolution bandwidth.
3.2.4. RF carrier suppression
The RF carrier suppression measured at the channel center frequency shall be at least 15dB below the peak sin(x)/x power
spectrum.
3.3. Receiver
3.3.1. Medium busy
The DSP reports to the WMAC the presence of a spread-spectrum signal on the medium by the MBUSY signal.
3.3.2. Minimum input level sensitivity
For all channels, the Frame-Error Rate (FER) shall be less than 8*10
-2
at a frame length of 1024 bytes for:
• an input level of -91dBm at 25ºC or -89dBm at full operational temperature range,
measured at the antenna connector using 1Mbit/s DBPSK modulation
• an input level of -88dBm at 25ºC or -86dBm at full operational temperature range,
measured at the antenna connector using 2Mbit/s DQPSK modulation
• an input level of -85dBm at 25ºC or -83dBm at full operational temperature range,
measured at the antenna connector using 5.5Mbit/s CCK modulation.
• an input level of -82dBm at 25ºC or -80dBm at full operational temperature range,
measured at the antenna connector using 11Mbit/s CCK modulation.
The test for the minimum input level sensitivity shall be conducted with the Carrier Detect threshold set less than –95dBm.
3.3.3. Maximum input level
The FER shall be less than 8*10
-2
(1024 byte frames) for a maximum input level of -4Bm measured at the antenna connector. This
applies to all modulation types and data rates.
3.3.4. Over-voltage protection
The receiver shall not be damaged by over-driving levels up to +17dBm at the antenna connector. No DC voltage shall be
exposed to the antenna connector.
3.3.5. Out-of-band signal rejection
A Mini-PCI board signal is applied together with two Continuous Wave (CW) interference signals at the receiver antenna input. The
level of the Mini-PCI board signal is -55dBm. The CW interference signals have equal level and 1.2MHz frequency distance. The
maximum level of each of the two interfering CW signals for a FER better than 8*10
-2
(1024 byte frames) is shown in Table 1 as a