Intertek Testing Services Ericsson Inc.
Model: DT-620
FCCID: AXAROA1173201
Report Name: ERI2433.DOC 3of 28
1.0 General Description
1.1 Product Description
The DT620 is a portable telephone which operates in the unlicensed isochronous PCS band from 1920Mhz
to 1930Mhz. The frequency spacing of 8 separate channels is 1.25Mhz with the lowest channel centered at
1920.625Mhz. The DT620 operates on two power levels, 2mW and 90mW. The maximum peak transmit
power level is 19.5dBm or 90mW. The Frequency reference for the handset is a 15Mhz Temperature
compensated crystal oscillator (TCXO), D200.
The portable transceiver is made up of two major circuit elements. A combination of digital and analog
circuits provides a telephony user interface, with associated keypad, display, microprocessor and battery
functions. The other part of the transceiver is the radio circuit. Radio circuits consist of synthesizers,
mixer, amplifiers and filters. Also included is the QPSK modem(D20) function and related radio control
functions for transmitting and receiving digital radio signals. Since the system is Time Division Duplexed
the same frequency is used for both transmit and receive.
After converting the TX signal to the frequency between 1920Mhz and 1930Mhz the signal is routed
through a 3 pole bandpass filter, k L235, which removes the 1075.625Mhz to 1085.625Mhz image signals
as well as the second LO at 1498.125 to 1506.875Mhz. A discrete filter follows the PA to reject harmonics
of the output signal.
1.2 Related Submittals / Grants
There is a related submittal for this application. A related filing has been made for the DT-600, a previous
version of the EUT. The FCC ID for the previous filing is AXAROA1173197. The base station for the DT
620 was filed under FCC ID: AXAKRC1011371.
1.3 Test Methodology
Both AC mains line-conducted and radiated emission measurements were performed according to the
procedures in ANSI C63.4 (1992). All measurements were performed in Open Area Test Sites. For each
scan, the procedures for maximizing emissions described in Section 8.1 of this report were followed. All
radiated tests were performed at an antenna to EUT distance of 3 meters, unless stated otherwise in the
appropriate section of this Application. The DT-620 was tested in accordance with ANSI C63.17:1998.
1.4 Test Facility
The North site is located at 4317-A Park Drive in Norcross, Georgia. The site consists of a wooden
enclosed structure with a steel ground plane. The site meets the characteristics of ANSI C63.4:1992 and is
on file with the FCC. Please reference the site filing number: 3140/SIT 1300F2, dated April 26, 1996. For
measurements a remotely controlled flush mount metal top turntable is used to rotate the EUT a full 360
degrees. A remote controlled non-conductive antenna mast is used to scan from one to four meter heights.
The site enclosure is constructed of non conductive materials.
