PLANTRONICS INC WH500 Internal Photos
Applicant:
Plantronics Inc.
Model:
WH500
FCC ID:
AL8-WH500
IC:
457A-WH500
DUT Type:
Portable UPCS/LE-PCS DECT Wireless Headset
Freq. Range:
1921.536 - 1928.448 MHz
2010 Celltech Labs Inc.
This document is not to be reproduced in whole or in part without the prior written permission of Celltech Labs Inc.
Page 1 of 3
RFx Exhibit Serial No.
051810AL8-T1020-S15D
RFx Exhibit Issue Date
June 18, 2010
RFx Exhibit Revision No.
Rev. 1.1 (2nd Release)
Test Lab Certificate No. 2470.01
FCC RF EXPOSURE EXHIBIT
Plantronics Model: WH500 DECT UPCS Wireless Headset FCC ID: AL8-WH500
Device Mode of Operation
Device Mode of Operation
The system (base and headset together) can be unlinked, linked but with no voice path open (idle locked state) or linked with
voice paths open. Unlinked is when the ends of the system are out of range. Linked but no voice path open is when the
system is ready for use but no voice path is active (idle locked), and linked with voice paths open is when the system is in use
for voice communication. Audio can be provided from the telephone and/or the USB interface.
Transmission Mode
voice paths open. Unlinked is when the ends of the system are out of range. Linked but no voice path open is when the
system is ready for use but no voice path is active (idle locked), and linked with voice paths open is when the system is in use
for voice communication. Audio can be provided from the telephone and/or the USB interface.
Transmission Mode
The headset unit is mated with the base unit (subscribed to each other) under normal operation. The communications link is
custom (double-slot) TDMA (UPCS standard), and is symmetrical; both ends of the link transmit using the same protocol.
Maximum Duty Cycle
custom (double-slot) TDMA (UPCS standard), and is symmetrical; both ends of the link transmit using the same protocol.
Maximum Duty Cycle
Maximum Duty Cycle occurs when the headset and base are in a wideband audio link. Maximum duty cycle (wideband audio
mode) is approximately 8.3%. For each end of the active link in wideband audio mode, a unit transmits for 2 out of 24
timeslots Æ 2:24 duty cycle. The DECT frame rate is 10ms, so each end of the link transmits for approximately 800 uS every
10ms when the system is linked and active. In narrowband audio mode, the duty cycle is exactly half that in wideband audio
mode, so approximately 4.1%. When the system is linked but voice paths are not open (headset is “idle-locked” to the base)
the base transmits with a 1.3% duty cycle (130uS every 10mS). In this mode the headset will transmit link maintenance
information every thirty seconds. When unlinked and out of range (the headset cannot hear the base), the headset does not
transmit, and the base transmits at a 1.3% duty cycle (130uS every 10mS). Two time slots are used for wideband audio,
effectively doubling the duty cycle, minus idle time.
mode) is approximately 8.3%. For each end of the active link in wideband audio mode, a unit transmits for 2 out of 24
timeslots Æ 2:24 duty cycle. The DECT frame rate is 10ms, so each end of the link transmits for approximately 800 uS every
10ms when the system is linked and active. In narrowband audio mode, the duty cycle is exactly half that in wideband audio
mode, so approximately 4.1%. When the system is linked but voice paths are not open (headset is “idle-locked” to the base)
the base transmits with a 1.3% duty cycle (130uS every 10mS). In this mode the headset will transmit link maintenance
information every thirty seconds. When unlinked and out of range (the headset cannot hear the base), the headset does not
transmit, and the base transmits at a 1.3% duty cycle (130uS every 10mS). Two time slots are used for wideband audio,
effectively doubling the duty cycle, minus idle time.
Maximum RF Output Power
Manufacturer’s Rated Maximum Peak Conducted Power = 19.7 dBm (93.3 mW)
Manufacturer’s Specified Source-Based Time-Averaged Duty Cycle = 8.3%
Max. Source-Based Time-Averaged Output Power = 8.9 dBm (7.8 mW)
Device Operating Configuration(s) and Exposure Conditions
Manufacturer’s Specified Source-Based Time-Averaged Duty Cycle = 8.3%
Max. Source-Based Time-Averaged Output Power = 8.9 dBm (7.8 mW)
Device Operating Configuration(s) and Exposure Conditions
The Plantronics WH500 Headset can be worn on either the left or right ear and is worn over-the-ear. The Plantronics WH500
Headset is intended for use within the General Population / Uncontrolled RF exposure environment. See photographs (next
page) of device and antenna placement.
Antenna-to-Ear Separation Distance
Headset is intended for use within the General Population / Uncontrolled RF exposure environment. See photographs (next
page) of device and antenna placement.
Antenna-to-Ear Separation Distance
15 mm (manufacturer measurement)
Analysis Summary
Analysis Summary
Based on the transmission modes, operating configurations and maximum source-based time-averaged output power and
duty cycle as described in this document, SAR compliance is demonstrated for the Plantronics WH500 DECT UPCS Headset
without routine SAR measurements (in accordance with the FCC’s response to KDB Inquiry Tracking Number 309465).
duty cycle as described in this document, SAR compliance is demonstrated for the Plantronics WH500 DECT UPCS Headset
without routine SAR measurements (in accordance with the FCC’s response to KDB Inquiry Tracking Number 309465).