Schematics

Report No.: BCTC2104274903E
No.：BCTC/RF-EMC-007 Page: 58 of 69 Edition：A.3
14. DWELL TIME
14.1 Block Diagram Of Test Setup
14.2 Limit
Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels.
The average time of occupancy on any channel shall not be greater than 0.4 seconds
within a period of 0.4 seconds multiplied by the number of hopping channels employed.
Frequency hopping systems may avoid or suppress transmissions on a particular
hopping frequency provided that a minimum of 15 channels are used.
14.3 Test procedure
1. Remove the antenna from the EUT and then connect a low RF cable from the antenna
port to the spectrum.
2. Set spectrum analyzer span = 0. Centred on a hopping channel;
3. Set RBW = 1MHz and VBW = 3MHz.Sweep = as necessary to capture the entire dwell
time per hopping channel. Set the EUT for DH5, DH3 and DH1 packet transmitting.
4. Use the marker-delta function to determine the dwell time. If this value varies with
different modes of operation (e.g.. data rate. modulation format. etc.). repeat this test for
each variation. The limit is specified in one of the subparagraphs of this Section. Submit
this plot(s).