ET-475
(430-0572)                 Specifications             Faxback Doc. # 8038


MEASUREMENT CONDITIONS

Supply Voltage

Handset Unit............................................... DC 3.7V +/-0.1V

Base Unit................................................... AC 120V, 60 Hz

Room Temperature..................... 77 +/-5 degrees F (25 +/-5 degrees C)

Channel Frequency

Handset Unit

CH                TX                RX

I                 49.770 MHz        46.710 MHz
M                 49.930 MHz        46.870 MHz
N                 49.990 MHz        46.930 MHz
Q                 49.970 MHz        46.970 MHz

Base Unit

CH                TX                RX

I                 46.710 MHz        49.770 MHz
M                 46.870 MHz        49.930 MHz
N                 46.930 MHz        49.990 MHz
Q                 46.970 MHz        49.970 MHz

Standard Modulation................................. 1 kHz, +/-2.5 kHz Dev.

Telephone Line Voltage........................................ 48 +/- 1 VDC

Pulse Dialing

Dialing Rate.................................................... 8 - 11 pps

Break Ratio....................................................... 58 - 64%

Interdigital Interval........................................ 750 - 2000 mS

Access Pause................................................. 1.7 - 3.3 sec

Tone Dialing

Duration Timing................................................ 100 - 50 mS

Interdigital Interval........................................... 80 - 50 mS

Frequency

Row 1......................................................... 687 - 707 Hz
Row 2......................................................... 759 - 781 Hz
Row 3......................................................... 840 - 864 Hz
Row 4......................................................... 927 - 955 Hz
Column 1.................................................... 1191 - 1227 Hz
Column 2.................................................... 1316 - 1356 Hz
Column 3.................................................... 1455 - 1499 Hz

Transmission Level

Signal Freq. @ 20 mA

Low Group.................................................. -5.0 - -7.5 dBm

High Group................................................. -3.0 - -5.5 dBm

Twist.............................................................. 0-4 dBm

Signal Freq. @ 80 mA

Low Group................................................... -5.0 - -12 dBm

High Group.................................................. -3.0 - -10 dBm

Twist.............................................................. 0-4 dBm

Distortion @ 20 mA

Low Group........................................................... 2 - 8%

High Group.......................................................... 2 - 8%

BASE UNIT
Receiver

Sensitivity Squelch........................................... 0.5 - 1.0 uV

Sensitivity....................................................... 1 - 2 uV

Bandwidth @ -6 dB...................................... +/-9.0 - +/-7.5 kHz

Adjacent Channel

Selectivity @ +2.0 kHz.......................................... 45 - 30 dB

Spurious Rejection.............................................. 40 - 27 dB

S/N (1 mV RF Input)............................................. 70 - 60 dB

THD (1 mV RF Input).............................................. 5.0 - 10%

Frequency Response
(Ref. 1 kHz) @ 500 Hz......................................... -3.0 +/-5 dB
             @ 3 kHz.......................................... -7.0 +/-5 dB

Line Output Level
@ 1 mV RF Input.............................................. -9.0 +/-4 dBm

Transmitter

Transmit Power at 50 ohm................................. 0.02 +/-0.05 vp-p

Frequency Tolerance..................................... +/-500 - +/-800 Hz

Modulation Sensitivity
Line Output @ -19 dBm.................................... +/-2.5 +/-0.5 kHz

Audio Freq. Response
(Ref. 1 kHz) @ 500 Hz....................................... -1.0 +/-0.5 dB
             @ 3 kHz............................................. 0 +/-5 dB
TELEPHONE RINGER

Ringer Level
@ "A-WEIGHT" 1 Foot............................................... 85-95 dB

Minimum Ringer Start
Voltage @ 20 Hz................................................. 35-40 Vrms

EIA Ringer Tap Voltage......................................... 130-105 Vdc

Memory Retention Time............................................ 15-10 Min

AC Power Consumption............................................. 3.0-6.0 W

Note:  Nominal specs represent the design specs.  All units should be able
       to approximate these - some will exceed and some may drop slightly
       below these specs.  Limit specs represent the absolute worst 
       condition which still might be considered acceptable; in no case
       should a unit fail to meet limit spec.

(km-03/26/1997)

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